From 4f5c45c7fc31a36355ddf0ce262f01944a9b0168 Mon Sep 17 00:00:00 2001
From: Siddhant Goel <me@sgoel.dev>
Date: Sun, 21 Apr 2024 20:49:33 +0200
Subject: [PATCH] feat: extract PS_START handler

---
 streaming_form_data/_parser.c   | 2410 ++++++++++++++++++-------------
 streaming_form_data/_parser.pyx |   38 +-
 2 files changed, 1429 insertions(+), 1019 deletions(-)

diff --git a/streaming_form_data/_parser.c b/streaming_form_data/_parser.c
index 1b9fe6d3..356e437e 100644
--- a/streaming_form_data/_parser.c
+++ b/streaming_form_data/_parser.c
@@ -1546,17 +1546,18 @@ struct __pyx_obj_19streaming_form_data_7_parser_Finder {
  * 
  * 
  * cdef class _Part:             # <<<<<<<<<<<<<<
- *     """One part of a multipart/form-data request
  *     """
+ *     A single part of a multipart/form-data request
  */
 struct __pyx_obj_19streaming_form_data_7_parser__Part {
   PyObject_HEAD
+  struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part *__pyx_vtab;
   PyObject *name;
   PyObject *targets;
 };
 
 
-/* "streaming_form_data/_parser.pyx":146
+/* "streaming_form_data/_parser.pyx":150
  * 
  * 
  * cdef class Part(_Part):             # <<<<<<<<<<<<<<
@@ -1568,7 +1569,7 @@ struct __pyx_obj_19streaming_form_data_7_parser_Part {
 };
 
 
-/* "streaming_form_data/_parser.pyx":160
+/* "streaming_form_data/_parser.pyx":167
  * 
  * 
  * cdef class AsyncPart(_Part):             # <<<<<<<<<<<<<<
@@ -1580,7 +1581,7 @@ struct __pyx_obj_19streaming_form_data_7_parser_AsyncPart {
 };
 
 
-/* "streaming_form_data/_parser.pyx":174
+/* "streaming_form_data/_parser.pyx":184
  * 
  * 
  * cdef class _Parser:             # <<<<<<<<<<<<<<
@@ -1604,7 +1605,7 @@ struct __pyx_obj_19streaming_form_data_7_parser__Parser {
 };
 
 
-/* "streaming_form_data/_parser.pyx":161
+/* "streaming_form_data/_parser.pyx":168
  * 
  * cdef class AsyncPart(_Part):
  *     async def start(self):             # <<<<<<<<<<<<<<
@@ -1620,7 +1621,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct__start {
 };
 
 
-/* "streaming_form_data/_parser.pyx":165
+/* "streaming_form_data/_parser.pyx":172
  *             await target.start()
  * 
  *     async def data_received(self, bytes chunk):             # <<<<<<<<<<<<<<
@@ -1637,7 +1638,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_1_data_receiv
 };
 
 
-/* "streaming_form_data/_parser.pyx":169
+/* "streaming_form_data/_parser.pyx":176
  *             await target.data_received(chunk)
  * 
  *     async def finish(self):             # <<<<<<<<<<<<<<
@@ -1653,7 +1654,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_2_finish {
 };
 
 
-/* "streaming_form_data/_parser.pyx":221
+/* "streaming_form_data/_parser.pyx":231
  *         self.active_part.start()
  * 
  *     async def async_set_active_part(self, part, str filename):             # <<<<<<<<<<<<<<
@@ -1668,7 +1669,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_3_async_set_a
 };
 
 
-/* "streaming_form_data/_parser.pyx":231
+/* "streaming_form_data/_parser.pyx":241
  *         self.active_part = None
  * 
  *     async def async_unset_active_part(self):             # <<<<<<<<<<<<<<
@@ -1681,7 +1682,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_4_async_unset
 };
 
 
-/* "streaming_form_data/_parser.pyx":240
+/* "streaming_form_data/_parser.pyx":250
  *             self.active_part.data_received(value)
  * 
  *     async def async_on_body(self, bytes value):             # <<<<<<<<<<<<<<
@@ -1695,7 +1696,7 @@ struct __pyx_obj_19streaming_form_data_7_parser___pyx_scope_struct_5_async_on_bo
 };
 
 
-/* "streaming_form_data/_parser.pyx":260
+/* "streaming_form_data/_parser.pyx":270
  *         return self._parse(chunk, index)
  * 
  *     async def async_data_received(self, bytes data):             # <<<<<<<<<<<<<<
@@ -1743,7 +1744,49 @@ struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder {
 static struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *__pyx_vtabptr_19streaming_form_data_7_parser_Finder;
 
 
-/* "streaming_form_data/_parser.pyx":174
+/* "streaming_form_data/_parser.pyx":123
+ * 
+ * 
+ * cdef class _Part:             # <<<<<<<<<<<<<<
+ *     """
+ *     A single part of a multipart/form-data request
+ */
+
+struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part {
+  PyObject *(*is_sync)(struct __pyx_obj_19streaming_form_data_7_parser__Part *);
+};
+static struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part *__pyx_vtabptr_19streaming_form_data_7_parser__Part;
+
+
+/* "streaming_form_data/_parser.pyx":150
+ * 
+ * 
+ * cdef class Part(_Part):             # <<<<<<<<<<<<<<
+ *     def start(self):
+ *         for target in self.targets:
+ */
+
+struct __pyx_vtabstruct_19streaming_form_data_7_parser_Part {
+  struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part __pyx_base;
+};
+static struct __pyx_vtabstruct_19streaming_form_data_7_parser_Part *__pyx_vtabptr_19streaming_form_data_7_parser_Part;
+
+
+/* "streaming_form_data/_parser.pyx":167
+ * 
+ * 
+ * cdef class AsyncPart(_Part):             # <<<<<<<<<<<<<<
+ *     async def start(self):
+ *         for target in self.targets:
+ */
+
+struct __pyx_vtabstruct_19streaming_form_data_7_parser_AsyncPart {
+  struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part __pyx_base;
+};
+static struct __pyx_vtabstruct_19streaming_form_data_7_parser_AsyncPart *__pyx_vtabptr_19streaming_form_data_7_parser_AsyncPart;
+
+
+/* "streaming_form_data/_parser.pyx":184
  * 
  * 
  * cdef class _Parser:             # <<<<<<<<<<<<<<
@@ -1754,8 +1797,10 @@ static struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *__pyx_vtab
 struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser {
   PyObject *(*_part_for)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, PyObject *);
   PyObject *(*include_leftover_buffer)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, PyObject *);
+  PyObject *(*handle_ps_start)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, __pyx_t_19streaming_form_data_7_parser_Byte const *, size_t *, size_t *);
   size_t (*rewind_fast_forward)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *, __pyx_t_19streaming_form_data_7_parser_Byte const *, size_t, size_t);
   PyObject *(*mark_error)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *);
+  PyObject *(*has_error)(struct __pyx_obj_19streaming_form_data_7_parser__Parser *);
 };
 static struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *__pyx_vtabptr_19streaming_form_data_7_parser__Parser;
 /* #### Code section: utility_code_proto ### */
@@ -2181,6 +2226,9 @@ static CYTHON_INLINE int __Pyx_PyList_Append(PyObject* list, PyObject* x) {
 #define __Pyx_PyList_Append(L,x) PyList_Append(L,x)
 #endif
 
+/* PyObjectCallNoArg.proto */
+static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func);
+
 /* IncludeStructmemberH.proto */
 #include <structmember.h>
 
@@ -2232,9 +2280,6 @@ static int __Pyx_PyObject_GetMethod(PyObject *obj, PyObject *name, PyObject **me
 /* PyObjectCallMethod1.proto */
 static PyObject* __Pyx_PyObject_CallMethod1(PyObject* obj, PyObject* method_name, PyObject* arg);
 
-/* PyObjectCallNoArg.proto */
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func);
-
 /* CoroutineBase.proto */
 struct __pyx_CoroutineObject;
 typedef PyObject *(*__pyx_coroutine_body_t)(struct __pyx_CoroutineObject *, PyThreadState *, PyObject *);
@@ -2774,10 +2819,15 @@ static int __pyx_f_19streaming_form_data_7_parser_6Finder_inactive(struct __pyx_
 static int __pyx_f_19streaming_form_data_7_parser_6Finder_active(struct __pyx_obj_19streaming_form_data_7_parser_Finder *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
 static int __pyx_f_19streaming_form_data_7_parser_6Finder_found(struct __pyx_obj_19streaming_form_data_7_parser_Finder *__pyx_v_self, int __pyx_skip_dispatch); /* proto*/
 static size_t __pyx_f_19streaming_form_data_7_parser_6Finder_matched_length(struct __pyx_obj_19streaming_form_data_7_parser_Finder *__pyx_v_self); /* proto*/
+static PyObject *__pyx_f_19streaming_form_data_7_parser_5_Part_is_sync(CYTHON_UNUSED struct __pyx_obj_19streaming_form_data_7_parser__Part *__pyx_v_self); /* proto*/
+static PyObject *__pyx_f_19streaming_form_data_7_parser_4Part_is_sync(CYTHON_UNUSED struct __pyx_obj_19streaming_form_data_7_parser_Part *__pyx_v_self); /* proto*/
+static PyObject *__pyx_f_19streaming_form_data_7_parser_9AsyncPart_is_sync(CYTHON_UNUSED struct __pyx_obj_19streaming_form_data_7_parser_AsyncPart *__pyx_v_self); /* proto*/
 static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser__part_for(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, PyObject *__pyx_v_name); /* proto*/
 static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_include_leftover_buffer(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, PyObject *__pyx_v_data); /* proto*/
+static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_handle_ps_start(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, __pyx_t_19streaming_form_data_7_parser_Byte const *__pyx_v_chunk_ptr, size_t *__pyx_v_idx, size_t *__pyx_v_buffer_start); /* proto*/
 static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forward(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self, __pyx_t_19streaming_form_data_7_parser_Byte const *__pyx_v_chunk_ptr, size_t __pyx_v_pos_first, size_t __pyx_v_pos_last); /* proto*/
 static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_mark_error(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self); /* proto*/
+static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_has_error(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self); /* proto*/
 
 /* Module declarations from "streaming_form_data._parser" */
 static int __pyx_v_19streaming_form_data_7_parser_c_hyphen;
@@ -2804,6 +2854,7 @@ int __pyx_module_is_main_streaming_form_data___parser = 0;
 /* Implementation of "streaming_form_data._parser" */
 /* #### Code section: global_var ### */
 static PyObject *__pyx_builtin_ValueError;
+static PyObject *__pyx_builtin_NotImplementedError;
 /* #### Code section: string_decls ### */
 static const char __pyx_k_[] = "";
 static const char __pyx_k_v[] = "v";
@@ -2878,6 +2929,7 @@ static const char __pyx_k_asyncio[] = "asyncio";
 static const char __pyx_k_default[] = "_default";
 static const char __pyx_k_disable[] = "disable";
 static const char __pyx_k_inspect[] = "inspect";
+static const char __pyx_k_is_sync[] = "is_sync";
 static const char __pyx_k_members[] = "__members__";
 static const char __pyx_k_message[] = "message";
 static const char __pyx_k_on_body[] = "on_body";
@@ -2970,6 +3022,7 @@ static const char __pyx_k_asyncio_coroutines[] = "asyncio.coroutines";
 static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
 static const char __pyx_k_multipart_filename[] = "multipart_filename";
 static const char __pyx_k_pyx_unpickle__Part[] = "__pyx_unpickle__Part";
+static const char __pyx_k_NotImplementedError[] = "NotImplementedError";
 static const char __pyx_k_Pyx_EnumBase___repr[] = "__Pyx_EnumBase.__repr__";
 static const char __pyx_k_Pyx_FlagBase___repr[] = "__Pyx_FlagBase.__repr__";
 static const char __pyx_k_async_data_received[] = "async_data_received";
@@ -3080,6 +3133,8 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6__pyx_unpickle_AsyncPa
 static PyObject *__pyx_pf_19streaming_form_data_7_parser_8__pyx_unpickle__Parser(CYTHON_UNUSED PyObject *__pyx_self, PyObject *__pyx_v___pyx_type, long __pyx_v___pyx_checksum, PyObject *__pyx_v___pyx_state); /* proto */
 static PyObject *__pyx_tp_new_19streaming_form_data_7_parser_Finder(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_19streaming_form_data_7_parser__Part(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_19streaming_form_data_7_parser_Part(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
+static PyObject *__pyx_tp_new_19streaming_form_data_7_parser_AsyncPart(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_19streaming_form_data_7_parser__Parser(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_19streaming_form_data_7_parser___pyx_scope_struct__start(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
 static PyObject *__pyx_tp_new_19streaming_form_data_7_parser___pyx_scope_struct_1_data_received(PyTypeObject *t, PyObject *a, PyObject *k); /*proto*/
@@ -3176,6 +3231,7 @@ typedef struct {
   PyObject *__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4;
   PyObject *__pyx_n_s_IntEnum;
   PyObject *__pyx_n_s_IntFlag;
+  PyObject *__pyx_n_s_NotImplementedError;
   PyObject *__pyx_n_s_NullTarget;
   PyObject *__pyx_n_s_OrderedDict;
   PyObject *__pyx_n_s_Parser;
@@ -3283,6 +3339,7 @@ typedef struct {
   PyObject *__pyx_n_s_inspect;
   PyObject *__pyx_n_s_is_async_target;
   PyObject *__pyx_n_s_is_coroutine;
+  PyObject *__pyx_n_s_is_sync;
   PyObject *__pyx_kp_u_isenabled;
   PyObject *__pyx_n_s_main;
   PyObject *__pyx_n_s_match_start;
@@ -3538,6 +3595,7 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4);
   Py_CLEAR(clear_module_state->__pyx_n_s_IntEnum);
   Py_CLEAR(clear_module_state->__pyx_n_s_IntFlag);
+  Py_CLEAR(clear_module_state->__pyx_n_s_NotImplementedError);
   Py_CLEAR(clear_module_state->__pyx_n_s_NullTarget);
   Py_CLEAR(clear_module_state->__pyx_n_s_OrderedDict);
   Py_CLEAR(clear_module_state->__pyx_n_s_Parser);
@@ -3645,6 +3703,7 @@ static int __pyx_m_clear(PyObject *m) {
   Py_CLEAR(clear_module_state->__pyx_n_s_inspect);
   Py_CLEAR(clear_module_state->__pyx_n_s_is_async_target);
   Py_CLEAR(clear_module_state->__pyx_n_s_is_coroutine);
+  Py_CLEAR(clear_module_state->__pyx_n_s_is_sync);
   Py_CLEAR(clear_module_state->__pyx_kp_u_isenabled);
   Py_CLEAR(clear_module_state->__pyx_n_s_main);
   Py_CLEAR(clear_module_state->__pyx_n_s_match_start);
@@ -3878,6 +3937,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4);
   Py_VISIT(traverse_module_state->__pyx_n_s_IntEnum);
   Py_VISIT(traverse_module_state->__pyx_n_s_IntFlag);
+  Py_VISIT(traverse_module_state->__pyx_n_s_NotImplementedError);
   Py_VISIT(traverse_module_state->__pyx_n_s_NullTarget);
   Py_VISIT(traverse_module_state->__pyx_n_s_OrderedDict);
   Py_VISIT(traverse_module_state->__pyx_n_s_Parser);
@@ -3985,6 +4045,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
   Py_VISIT(traverse_module_state->__pyx_n_s_inspect);
   Py_VISIT(traverse_module_state->__pyx_n_s_is_async_target);
   Py_VISIT(traverse_module_state->__pyx_n_s_is_coroutine);
+  Py_VISIT(traverse_module_state->__pyx_n_s_is_sync);
   Py_VISIT(traverse_module_state->__pyx_kp_u_isenabled);
   Py_VISIT(traverse_module_state->__pyx_n_s_main);
   Py_VISIT(traverse_module_state->__pyx_n_s_match_start);
@@ -4228,6 +4289,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4 __pyx_mstate_global->__pyx_kp_s_Incompatible_checksums_0x_x_vs_0_4
 #define __pyx_n_s_IntEnum __pyx_mstate_global->__pyx_n_s_IntEnum
 #define __pyx_n_s_IntFlag __pyx_mstate_global->__pyx_n_s_IntFlag
+#define __pyx_n_s_NotImplementedError __pyx_mstate_global->__pyx_n_s_NotImplementedError
 #define __pyx_n_s_NullTarget __pyx_mstate_global->__pyx_n_s_NullTarget
 #define __pyx_n_s_OrderedDict __pyx_mstate_global->__pyx_n_s_OrderedDict
 #define __pyx_n_s_Parser __pyx_mstate_global->__pyx_n_s_Parser
@@ -4335,6 +4397,7 @@ static int __pyx_m_traverse(PyObject *m, visitproc visit, void *arg) {
 #define __pyx_n_s_inspect __pyx_mstate_global->__pyx_n_s_inspect
 #define __pyx_n_s_is_async_target __pyx_mstate_global->__pyx_n_s_is_async_target
 #define __pyx_n_s_is_coroutine __pyx_mstate_global->__pyx_n_s_is_coroutine
+#define __pyx_n_s_is_sync __pyx_mstate_global->__pyx_n_s_is_sync
 #define __pyx_kp_u_isenabled __pyx_mstate_global->__pyx_kp_u_isenabled
 #define __pyx_n_s_main __pyx_mstate_global->__pyx_n_s_main
 #define __pyx_n_s_match_start __pyx_mstate_global->__pyx_n_s_match_start
@@ -9084,7 +9147,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_6Finder_12__setstate_cy
   return __pyx_r;
 }
 
-/* "streaming_form_data/_parser.pyx":130
+/* "streaming_form_data/_parser.pyx":131
  *     cdef list targets
  * 
  *     def __init__(self, str name, object target):             # <<<<<<<<<<<<<<
@@ -9131,7 +9194,7 @@ static int __pyx_pw_19streaming_form_data_7_parser_5_Part_1__init__(PyObject *__
           (void)__Pyx_Arg_NewRef_VARARGS(values[0]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 130, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 131, __pyx_L3_error)
         else goto __pyx_L5_argtuple_error;
         CYTHON_FALLTHROUGH;
         case  1:
@@ -9139,14 +9202,14 @@ static int __pyx_pw_19streaming_form_data_7_parser_5_Part_1__init__(PyObject *__
           (void)__Pyx_Arg_NewRef_VARARGS(values[1]);
           kw_args--;
         }
-        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 130, __pyx_L3_error)
+        else if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 131, __pyx_L3_error)
         else {
-          __Pyx_RaiseArgtupleInvalid("__init__", 1, 2, 2, 1); __PYX_ERR(0, 130, __pyx_L3_error)
+          __Pyx_RaiseArgtupleInvalid("__init__", 1, 2, 2, 1); __PYX_ERR(0, 131, __pyx_L3_error)
         }
       }
       if (unlikely(kw_args > 0)) {
         const Py_ssize_t kwd_pos_args = __pyx_nargs;
-        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "__init__") < 0)) __PYX_ERR(0, 130, __pyx_L3_error)
+        if (unlikely(__Pyx_ParseOptionalKeywords(__pyx_kwds, __pyx_kwvalues, __pyx_pyargnames, 0, values + 0, kwd_pos_args, "__init__") < 0)) __PYX_ERR(0, 131, __pyx_L3_error)
       }
     } else if (unlikely(__pyx_nargs != 2)) {
       goto __pyx_L5_argtuple_error;
@@ -9159,7 +9222,7 @@ static int __pyx_pw_19streaming_form_data_7_parser_5_Part_1__init__(PyObject *__
   }
   goto __pyx_L6_skip;
   __pyx_L5_argtuple_error:;
-  __Pyx_RaiseArgtupleInvalid("__init__", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 130, __pyx_L3_error)
+  __Pyx_RaiseArgtupleInvalid("__init__", 1, 2, 2, __pyx_nargs); __PYX_ERR(0, 131, __pyx_L3_error)
   __pyx_L6_skip:;
   goto __pyx_L4_argument_unpacking_done;
   __pyx_L3_error:;
@@ -9173,7 +9236,7 @@ static int __pyx_pw_19streaming_form_data_7_parser_5_Part_1__init__(PyObject *__
   __Pyx_RefNannyFinishContext();
   return -1;
   __pyx_L4_argument_unpacking_done:;
-  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_name), (&PyUnicode_Type), 1, "name", 1))) __PYX_ERR(0, 130, __pyx_L1_error)
+  if (unlikely(!__Pyx_ArgTypeTest(((PyObject *)__pyx_v_name), (&PyUnicode_Type), 1, "name", 1))) __PYX_ERR(0, 131, __pyx_L1_error)
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-        /* "streaming_form_data/_parser.pyx":329
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-        /* "streaming_form_data/_parser.pyx":328
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-      /* "streaming_form_data/_parser.pyx":332
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-        /* "streaming_form_data/_parser.pyx":339
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-        /* "streaming_form_data/_parser.pyx":337
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-      /* "streaming_form_data/_parser.pyx":341
+      /* "streaming_form_data/_parser.pyx":358
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-      /* "streaming_form_data/_parser.pyx":343
+      /* "streaming_form_data/_parser.pyx":360
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@@ -16099,7 +16372,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-      /* "streaming_form_data/_parser.pyx":331
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@@ -16109,7 +16382,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-      /* "streaming_form_data/_parser.pyx":345
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-        /* "streaming_form_data/_parser.pyx":346
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-        /* "streaming_form_data/_parser.pyx":345
+        /* "streaming_form_data/_parser.pyx":362
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@@ -16147,7 +16420,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-      /* "streaming_form_data/_parser.pyx":349
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-        /* "streaming_form_data/_parser.pyx":350
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-        /* "streaming_form_data/_parser.pyx":351
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         __Pyx_XDECREF(__pyx_r);
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-        /* "streaming_form_data/_parser.pyx":349
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-      __Pyx_GetModuleGlobalName(__pyx_t_4, __pyx_n_s_Parser); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 353, __pyx_L1_error)
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+      __pyx_t_9 = (__Pyx_PySequence_ContainsTF(__pyx_kp_u_content_type, __pyx_v_message, Py_EQ)); if (unlikely((__pyx_t_9 < 0))) __PYX_ERR(0, 392, __pyx_L1_error)
       if (__pyx_t_9) {
 
-        /* "streaming_form_data/_parser.pyx":376
+        /* "streaming_form_data/_parser.pyx":393
  *                         self.set_active_part(part, params.get("filename"))
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  *                     if self.active_part:             # <<<<<<<<<<<<<<
  *                         self.active_part.set_multipart_content_type(
  *                             message.get_content_type()
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-        __pyx_t_9 = __Pyx_PyObject_IsTrue(__pyx_v_self->active_part); if (unlikely((__pyx_t_9 < 0))) __PYX_ERR(0, 376, __pyx_L1_error)
+        __pyx_t_9 = __Pyx_PyObject_IsTrue(__pyx_v_self->active_part); if (unlikely((__pyx_t_9 < 0))) __PYX_ERR(0, 393, __pyx_L1_error)
         if (__pyx_t_9) {
 
-          /* "streaming_form_data/_parser.pyx":377
+          /* "streaming_form_data/_parser.pyx":394
  *                 elif "content-type" in message:
  *                     if self.active_part:
  *                         self.active_part.set_multipart_content_type(             # <<<<<<<<<<<<<<
  *                             message.get_content_type()
  *                         )
  */
-          __pyx_t_5 = __Pyx_PyObject_GetAttrStr(__pyx_v_self->active_part, __pyx_n_s_set_multipart_content_type); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 377, __pyx_L1_error)
+          __pyx_t_5 = __Pyx_PyObject_GetAttrStr(__pyx_v_self->active_part, __pyx_n_s_set_multipart_content_type); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 394, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_5);
 
-          /* "streaming_form_data/_parser.pyx":378
+          /* "streaming_form_data/_parser.pyx":395
  *                     if self.active_part:
  *                         self.active_part.set_multipart_content_type(
  *                             message.get_content_type()             # <<<<<<<<<<<<<<
  *                         )
  * 
  */
-          __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_v_message, __pyx_n_s_get_content_type); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 378, __pyx_L1_error)
+          __pyx_t_4 = __Pyx_PyObject_GetAttrStr(__pyx_v_message, __pyx_n_s_get_content_type); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 395, __pyx_L1_error)
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           __pyx_t_10 = NULL;
           __pyx_t_8 = 0;
@@ -16629,7 +16902,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
             PyObject *__pyx_callargs[2] = {__pyx_t_10, NULL};
             __pyx_t_7 = __Pyx_PyObject_FastCall(__pyx_t_4, __pyx_callargs+1-__pyx_t_8, 0+__pyx_t_8);
             __Pyx_XDECREF(__pyx_t_10); __pyx_t_10 = 0;
-            if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 378, __pyx_L1_error)
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             __Pyx_DECREF(__pyx_t_4); __pyx_t_4 = 0;
           }
@@ -16652,13 +16925,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
             __pyx_t_6 = __Pyx_PyObject_FastCall(__pyx_t_5, __pyx_callargs+1-__pyx_t_8, 1+__pyx_t_8);
             __Pyx_XDECREF(__pyx_t_4); __pyx_t_4 = 0;
             __Pyx_DECREF(__pyx_t_7); __pyx_t_7 = 0;
-            if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 377, __pyx_L1_error)
+            if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 394, __pyx_L1_error)
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           __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-          /* "streaming_form_data/_parser.pyx":376
+          /* "streaming_form_data/_parser.pyx":393
  *                         self.set_active_part(part, params.get("filename"))
  *                 elif "content-type" in message:
  *                     if self.active_part:             # <<<<<<<<<<<<<<
@@ -16667,7 +16940,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         }
 
-        /* "streaming_form_data/_parser.pyx":375
+        /* "streaming_form_data/_parser.pyx":392
  * 
  *                         self.set_active_part(part, params.get("filename"))
  *                 elif "content-type" in message:             # <<<<<<<<<<<<<<
@@ -16677,7 +16950,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       }
       __pyx_L13:;
 
-      /* "streaming_form_data/_parser.pyx":381
+      /* "streaming_form_data/_parser.pyx":398
  *                         )
  * 
  *                 buffer_start = idx + 1             # <<<<<<<<<<<<<<
@@ -16686,7 +16959,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_buffer_start = (__pyx_v_idx + 1);
 
-      /* "streaming_form_data/_parser.pyx":383
+      /* "streaming_form_data/_parser.pyx":400
  *                 buffer_start = idx + 1
  * 
  *                 self.state = ParserState.PS_ENDED_HEADER             # <<<<<<<<<<<<<<
@@ -16695,7 +16968,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_ENDED_HEADER;
 
-      /* "streaming_form_data/_parser.pyx":348
+      /* "streaming_form_data/_parser.pyx":365
  *                     self.state = ParserState.PS_ENDING_HEADER
  * 
  *             elif self.state == ParserState.PS_ENDING_HEADER:             # <<<<<<<<<<<<<<
@@ -16705,7 +16978,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_ENDED_HEADER:
 
-      /* "streaming_form_data/_parser.pyx":385
+      /* "streaming_form_data/_parser.pyx":402
  *                 self.state = ParserState.PS_ENDED_HEADER
  *             elif self.state == ParserState.PS_ENDED_HEADER:
  *                 if byte == c_cr:             # <<<<<<<<<<<<<<
@@ -16715,7 +16988,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       __pyx_t_9 = (__pyx_v_byte == __pyx_v_19streaming_form_data_7_parser_c_cr);
       if (__pyx_t_9) {
 
-        /* "streaming_form_data/_parser.pyx":386
+        /* "streaming_form_data/_parser.pyx":403
  *             elif self.state == ParserState.PS_ENDED_HEADER:
  *                 if byte == c_cr:
  *                     self.state = ParserState.PS_ENDING_ALL_HEADERS             # <<<<<<<<<<<<<<
@@ -16724,7 +16997,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_ENDING_ALL_HEADERS;
 
-        /* "streaming_form_data/_parser.pyx":385
+        /* "streaming_form_data/_parser.pyx":402
  *                 self.state = ParserState.PS_ENDED_HEADER
  *             elif self.state == ParserState.PS_ENDED_HEADER:
  *                 if byte == c_cr:             # <<<<<<<<<<<<<<
@@ -16734,7 +17007,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         goto __pyx_L19;
       }
 
-      /* "streaming_form_data/_parser.pyx":388
+      /* "streaming_form_data/_parser.pyx":405
  *                     self.state = ParserState.PS_ENDING_ALL_HEADERS
  *                 else:
  *                     self.state = ParserState.PS_READING_HEADER             # <<<<<<<<<<<<<<
@@ -16746,7 +17019,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       }
       __pyx_L19:;
 
-      /* "streaming_form_data/_parser.pyx":384
+      /* "streaming_form_data/_parser.pyx":401
  * 
  *                 self.state = ParserState.PS_ENDED_HEADER
  *             elif self.state == ParserState.PS_ENDED_HEADER:             # <<<<<<<<<<<<<<
@@ -16756,7 +17029,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
       case __pyx_e_19streaming_form_data_7_parser_PS_ENDING_ALL_HEADERS:
 
-      /* "streaming_form_data/_parser.pyx":391
+      /* "streaming_form_data/_parser.pyx":408
  * 
  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:
  *                 if byte != c_lf:             # <<<<<<<<<<<<<<
@@ -16766,18 +17039,18 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       __pyx_t_9 = (__pyx_v_byte != __pyx_v_19streaming_form_data_7_parser_c_lf);
       if (__pyx_t_9) {
 
-        /* "streaming_form_data/_parser.pyx":392
+        /* "streaming_form_data/_parser.pyx":409
  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:
  *                 if byte != c_lf:
  *                     self.mark_error()             # <<<<<<<<<<<<<<
  *                     return ErrorCode.E_PART_HEADERS
  * 
  */
-        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 392, __pyx_L1_error)
+        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 409, __pyx_L1_error)
         __Pyx_GOTREF(__pyx_t_6);
         __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-        /* "streaming_form_data/_parser.pyx":393
+        /* "streaming_form_data/_parser.pyx":410
  *                 if byte != c_lf:
  *                     self.mark_error()
  *                     return ErrorCode.E_PART_HEADERS             # <<<<<<<<<<<<<<
@@ -16785,13 +17058,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  *                 buffer_start = idx + 1
  */
         __Pyx_XDECREF(__pyx_r);
-        __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_PART_HEADERS); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 393, __pyx_L1_error)
+        __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_PART_HEADERS); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 410, __pyx_L1_error)
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         __pyx_r = __pyx_t_6;
         __pyx_t_6 = 0;
         goto __pyx_L0;
 
-        /* "streaming_form_data/_parser.pyx":391
+        /* "streaming_form_data/_parser.pyx":408
  * 
  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:
  *                 if byte != c_lf:             # <<<<<<<<<<<<<<
@@ -16800,7 +17073,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       }
 
-      /* "streaming_form_data/_parser.pyx":395
+      /* "streaming_form_data/_parser.pyx":412
  *                     return ErrorCode.E_PART_HEADERS
  * 
  *                 buffer_start = idx + 1             # <<<<<<<<<<<<<<
@@ -16809,7 +17082,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_buffer_start = (__pyx_v_idx + 1);
 
-      /* "streaming_form_data/_parser.pyx":397
+      /* "streaming_form_data/_parser.pyx":414
  *                 buffer_start = idx + 1
  * 
  *                 self.state = ParserState.PS_READING_BODY             # <<<<<<<<<<<<<<
@@ -16818,7 +17091,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_READING_BODY;
 
-      /* "streaming_form_data/_parser.pyx":390
+      /* "streaming_form_data/_parser.pyx":407
  *                     self.state = ParserState.PS_READING_HEADER
  * 
  *             elif self.state == ParserState.PS_ENDING_ALL_HEADERS:             # <<<<<<<<<<<<<<
@@ -16828,39 +17101,39 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
       break;
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-      /* "streaming_form_data/_parser.pyx":399
+      /* "streaming_form_data/_parser.pyx":416
  *                 self.state = ParserState.PS_READING_BODY
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  *                 self.delimiter_finder.feed(byte)             # <<<<<<<<<<<<<<
  *                 self.ender_finder.feed(byte)
  * 
  */
-      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 399, __pyx_L1_error)
+      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 416, __pyx_L1_error)
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       __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-      /* "streaming_form_data/_parser.pyx":400
+      /* "streaming_form_data/_parser.pyx":417
  *             elif self.state == ParserState.PS_READING_BODY:
  *                 self.delimiter_finder.feed(byte)
  *                 self.ender_finder.feed(byte)             # <<<<<<<<<<<<<<
  * 
  *                 if self.delimiter_finder.found():
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-      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 400, __pyx_L1_error)
+      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_byte, 0); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 417, __pyx_L1_error)
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-      /* "streaming_form_data/_parser.pyx":402
+      /* "streaming_form_data/_parser.pyx":419
  *                 self.ender_finder.feed(byte)
  * 
  *                 if self.delimiter_finder.found():             # <<<<<<<<<<<<<<
  *                     self.state = ParserState.PS_READING_HEADER
  * 
  */
-      __pyx_t_9 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->found(__pyx_v_self->delimiter_finder, 0); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 402, __pyx_L1_error)
+      __pyx_t_9 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->found(__pyx_v_self->delimiter_finder, 0); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 419, __pyx_L1_error)
       if (__pyx_t_9) {
 
-        /* "streaming_form_data/_parser.pyx":403
+        /* "streaming_form_data/_parser.pyx":420
  * 
  *                 if self.delimiter_finder.found():
  *                     self.state = ParserState.PS_READING_HEADER             # <<<<<<<<<<<<<<
@@ -16869,7 +17142,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_READING_HEADER;
 
-        /* "streaming_form_data/_parser.pyx":405
+        /* "streaming_form_data/_parser.pyx":422
  *                     self.state = ParserState.PS_READING_HEADER
  * 
  *                     if idx + 1 < self.delimiter_length:             # <<<<<<<<<<<<<<
@@ -16879,18 +17152,18 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         __pyx_t_9 = ((__pyx_v_idx + 1) < __pyx_v_self->delimiter_length);
         if (__pyx_t_9) {
 
-          /* "streaming_form_data/_parser.pyx":406
+          /* "streaming_form_data/_parser.pyx":423
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  *                     if idx + 1 < self.delimiter_length:
  *                         self.mark_error()             # <<<<<<<<<<<<<<
  *                         return ErrorCode.E_INTERNAL
  * 
  */
-          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 406, __pyx_L1_error)
+          __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 423, __pyx_L1_error)
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           __Pyx_DECREF(__pyx_t_6); __pyx_t_6 = 0;
 
-          /* "streaming_form_data/_parser.pyx":407
+          /* "streaming_form_data/_parser.pyx":424
  *                     if idx + 1 < self.delimiter_length:
  *                         self.mark_error()
  *                         return ErrorCode.E_INTERNAL             # <<<<<<<<<<<<<<
@@ -16898,13 +17171,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  *                     match_start = idx + 1 - self.delimiter_length
  */
           __Pyx_XDECREF(__pyx_r);
-          __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 407, __pyx_L1_error)
+          __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 424, __pyx_L1_error)
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           __pyx_r = __pyx_t_6;
           __pyx_t_6 = 0;
           goto __pyx_L0;
 
-          /* "streaming_form_data/_parser.pyx":405
+          /* "streaming_form_data/_parser.pyx":422
  *                     self.state = ParserState.PS_READING_HEADER
  * 
  *                     if idx + 1 < self.delimiter_length:             # <<<<<<<<<<<<<<
@@ -16913,7 +17186,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         }
 
-        /* "streaming_form_data/_parser.pyx":409
+        /* "streaming_form_data/_parser.pyx":426
  *                         return ErrorCode.E_INTERNAL
  * 
  *                     match_start = idx + 1 - self.delimiter_length             # <<<<<<<<<<<<<<
@@ -16922,7 +17195,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
         __pyx_v_match_start = ((__pyx_v_idx + 1) - __pyx_v_self->delimiter_length);
 
-        /* "streaming_form_data/_parser.pyx":411
+        /* "streaming_form_data/_parser.pyx":428
  *                     match_start = idx + 1 - self.delimiter_length
  * 
  *                     if match_start >= buffer_start:             # <<<<<<<<<<<<<<
@@ -16932,7 +17205,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         __pyx_t_9 = (__pyx_v_match_start >= __pyx_v_buffer_start);
         if (__pyx_t_9) {
 
-          /* "streaming_form_data/_parser.pyx":412
+          /* "streaming_form_data/_parser.pyx":429
  * 
  *                     if match_start >= buffer_start:
  *                         try:             # <<<<<<<<<<<<<<
@@ -16948,20 +17221,20 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
             __Pyx_XGOTREF(__pyx_t_13);
             /*try:*/ {
 
-              /* "streaming_form_data/_parser.pyx":413
+              /* "streaming_form_data/_parser.pyx":430
  *                     if match_start >= buffer_start:
  *                         try:
  *                             self.on_body(chunk[buffer_start: match_start])             # <<<<<<<<<<<<<<
  *                         except Exception:
  *                             self.mark_error()
  */
-              __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_on_body); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 413, __pyx_L24_error)
+              __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_on_body); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 430, __pyx_L24_error)
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@@ -17361,11 +17634,11 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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  *                     if match_start >= buffer_start:
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@@ -17381,7 +17654,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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  *                     if match_start >= buffer_start:             # <<<<<<<<<<<<<<
@@ -17391,7 +17664,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
           goto __pyx_L35;
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-        /* "streaming_form_data/_parser.pyx":441
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@@ -17399,11 +17672,11 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          /* "streaming_form_data/_parser.pyx":442
+          /* "streaming_form_data/_parser.pyx":459
  *                     else:
  *                         self.mark_error()
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@@ -17411,7 +17684,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 442, __pyx_L1_error)
+          __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 459, __pyx_L1_error)
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@@ -17419,7 +17692,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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         __pyx_L35:;
 
-        /* "streaming_form_data/_parser.pyx":444
+        /* "streaming_form_data/_parser.pyx":461
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  *                     buffer_start = idx + 1             # <<<<<<<<<<<<<<
@@ -17428,14 +17701,14 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-        /* "streaming_form_data/_parser.pyx":446
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  *                     self.unset_active_part()             # <<<<<<<<<<<<<<
  *                     self.ender_finder.reset()
  * 
  */
-        __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_unset_active_part); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 446, __pyx_L1_error)
+        __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_unset_active_part); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 463, __pyx_L1_error)
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@@ -17455,24 +17728,24 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 446, __pyx_L1_error)
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-        /* "streaming_form_data/_parser.pyx":447
+        /* "streaming_form_data/_parser.pyx":464
  * 
  *                     self.unset_active_part()
  *                     self.ender_finder.reset()             # <<<<<<<<<<<<<<
  * 
  *                 else:
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-        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 447, __pyx_L1_error)
+        __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 464, __pyx_L1_error)
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-        /* "streaming_form_data/_parser.pyx":426
+        /* "streaming_form_data/_parser.pyx":443
  *                     self.delimiter_finder.reset()
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  *                 elif self.ender_finder.found():             # <<<<<<<<<<<<<<
@@ -17482,7 +17755,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
         goto __pyx_L21;
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-      /* "streaming_form_data/_parser.pyx":455
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  *                     if self.delimiter_finder.inactive():             # <<<<<<<<<<<<<<
@@ -17490,20 +17763,20 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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+        __pyx_t_9 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->inactive(__pyx_v_self->delimiter_finder, 0); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 472, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":456
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+          __pyx_t_14 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->rewind_fast_forward(__pyx_v_self, __pyx_v_chunk_ptr, (__pyx_v_idx + 1), (__pyx_v_chunk_len - 1)); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 473, __pyx_L1_error)
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-          /* "streaming_form_data/_parser.pyx":459
+          /* "streaming_form_data/_parser.pyx":476
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@@ -17512,7 +17785,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          /* "streaming_form_data/_parser.pyx":455
+          /* "streaming_form_data/_parser.pyx":472
  *                     # middle of a potential delimiter.
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  *                     if self.delimiter_finder.inactive():             # <<<<<<<<<<<<<<
@@ -17523,7 +17796,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-      /* "streaming_form_data/_parser.pyx":398
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  *             elif self.state == ParserState.PS_READING_BODY:             # <<<<<<<<<<<<<<
@@ -17533,7 +17806,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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       case __pyx_e_19streaming_form_data_7_parser_PS_END:
 
-      /* "streaming_form_data/_parser.pyx":462
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@@ -17541,13 +17814,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-      __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_OK); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 462, __pyx_L1_error)
+      __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_OK); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 479, __pyx_L1_error)
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-      /* "streaming_form_data/_parser.pyx":461
+      /* "streaming_form_data/_parser.pyx":478
  *                         idx += skip_count
  * 
  *             elif self.state == ParserState.PS_END:             # <<<<<<<<<<<<<<
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       break;
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-      /* "streaming_form_data/_parser.pyx":464
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-      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 464, __pyx_L1_error)
+      __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 481, __pyx_L1_error)
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-      /* "streaming_form_data/_parser.pyx":465
+      /* "streaming_form_data/_parser.pyx":482
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  *                 self.mark_error()
  *                 return ErrorCode.E_INTERNAL             # <<<<<<<<<<<<<<
@@ -17576,7 +17849,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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+      __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 482, __pyx_L1_error)
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@@ -17584,7 +17857,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-    /* "streaming_form_data/_parser.pyx":467
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-  /* "streaming_form_data/_parser.pyx":469
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-    /* "streaming_form_data/_parser.pyx":470
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  *         if idx != chunk_len:
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  */
-    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 470, __pyx_L1_error)
+    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 487, __pyx_L1_error)
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-    /* "streaming_form_data/_parser.pyx":471
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+    __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 488, __pyx_L1_error)
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-    /* "streaming_form_data/_parser.pyx":469
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  *         if idx != chunk_len:             # <<<<<<<<<<<<<<
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-  /* "streaming_form_data/_parser.pyx":473
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  *         if buffer_start > chunk_len:             # <<<<<<<<<<<<<<
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-    /* "streaming_form_data/_parser.pyx":474
+    /* "streaming_form_data/_parser.pyx":491
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  *         if buffer_start > chunk_len:
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  *             return ErrorCode.E_INTERNAL
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  */
-    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 474, __pyx_L1_error)
+    __pyx_t_6 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 491, __pyx_L1_error)
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-    /* "streaming_form_data/_parser.pyx":475
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@@ -17667,13 +17940,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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     __Pyx_XDECREF(__pyx_r);
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+    __pyx_t_6 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_INTERNAL); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 492, __pyx_L1_error)
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-    /* "streaming_form_data/_parser.pyx":473
+    /* "streaming_form_data/_parser.pyx":490
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  *         if buffer_start > chunk_len:             # <<<<<<<<<<<<<<
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  */
   }
 
-  /* "streaming_form_data/_parser.pyx":477
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-    /* "streaming_form_data/_parser.pyx":480
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+    __pyx_t_14 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->matched_length(__pyx_v_self->ender_finder); if (unlikely(PyErr_Occurred())) __PYX_ERR(0, 497, __pyx_L1_error)
 
-    /* "streaming_form_data/_parser.pyx":479
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-    /* "streaming_form_data/_parser.pyx":480
+    /* "streaming_form_data/_parser.pyx":497
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@@ -17725,7 +17998,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
     }
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-    /* "streaming_form_data/_parser.pyx":482
+    /* "streaming_form_data/_parser.pyx":499
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  *             match_start = idx - matched_length             # <<<<<<<<<<<<<<
@@ -17734,7 +18007,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-    /* "streaming_form_data/_parser.pyx":484
+    /* "streaming_form_data/_parser.pyx":501
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  * 
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@@ -17744,7 +18017,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-      /* "streaming_form_data/_parser.pyx":485
+      /* "streaming_form_data/_parser.pyx":502
  * 
  *             if match_start >= buffer_start + c_min_file_body_chunk_size:
  *                 try:             # <<<<<<<<<<<<<<
@@ -17760,20 +18033,20 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          /* "streaming_form_data/_parser.pyx":486
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-          __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_on_body); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 486, __pyx_L51_error)
+          __pyx_t_5 = __Pyx_PyObject_GetAttrStr(((PyObject *)__pyx_v_self), __pyx_n_s_on_body); if (unlikely(!__pyx_t_5)) __PYX_ERR(0, 503, __pyx_L51_error)
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             PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
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-          __pyx_t_7 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, __pyx_v_match_start); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 486, __pyx_L51_error)
+          __pyx_t_7 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, __pyx_v_match_start); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 503, __pyx_L51_error)
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@@ -17794,13 +18067,13 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-            if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 486, __pyx_L51_error)
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-          /* "streaming_form_data/_parser.pyx":485
+          /* "streaming_form_data/_parser.pyx":502
  * 
  *             if match_start >= buffer_start + c_min_file_body_chunk_size:
  *                 try:             # <<<<<<<<<<<<<<
@@ -17819,7 +18092,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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         __Pyx_XDECREF(__pyx_t_7); __pyx_t_7 = 0;
 
-        /* "streaming_form_data/_parser.pyx":487
+        /* "streaming_form_data/_parser.pyx":504
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  *                 except Exception:             # <<<<<<<<<<<<<<
@@ -17829,23 +18102,23 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          if (__Pyx_GetException(&__pyx_t_6, &__pyx_t_5, &__pyx_t_7) < 0) __PYX_ERR(0, 487, __pyx_L53_except_error)
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-          /* "streaming_form_data/_parser.pyx":488
+          /* "streaming_form_data/_parser.pyx":505
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-          __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 488, __pyx_L53_except_error)
+          __pyx_t_4 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser__Parser *)__pyx_v_self->__pyx_vtab)->mark_error(__pyx_v_self); if (unlikely(!__pyx_t_4)) __PYX_ERR(0, 505, __pyx_L53_except_error)
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-          /* "streaming_form_data/_parser.pyx":489
+          /* "streaming_form_data/_parser.pyx":506
  *                 except Exception:
  *                     self.mark_error()
  *                     raise             # <<<<<<<<<<<<<<
@@ -17857,11 +18130,11 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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-          __PYX_ERR(0, 489, __pyx_L53_except_error)
+          __PYX_ERR(0, 506, __pyx_L53_except_error)
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         goto __pyx_L53_except_error;
 
-        /* "streaming_form_data/_parser.pyx":485
+        /* "streaming_form_data/_parser.pyx":502
  * 
  *             if match_start >= buffer_start + c_min_file_body_chunk_size:
  *                 try:             # <<<<<<<<<<<<<<
@@ -17877,7 +18150,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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       }
 
-      /* "streaming_form_data/_parser.pyx":491
+      /* "streaming_form_data/_parser.pyx":508
  *                     raise
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  *                 buffer_start = match_start             # <<<<<<<<<<<<<<
@@ -17886,7 +18159,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
       __pyx_v_buffer_start = __pyx_v_match_start;
 
-      /* "streaming_form_data/_parser.pyx":484
+      /* "streaming_form_data/_parser.pyx":501
  *             match_start = idx - matched_length
  * 
  *             if match_start >= buffer_start + c_min_file_body_chunk_size:             # <<<<<<<<<<<<<<
@@ -17895,7 +18168,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
     }
 
-    /* "streaming_form_data/_parser.pyx":477
+    /* "streaming_form_data/_parser.pyx":494
  *             return ErrorCode.E_INTERNAL
  * 
  *         if self.state == ParserState.PS_READING_BODY:             # <<<<<<<<<<<<<<
@@ -17904,7 +18177,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":493
+  /* "streaming_form_data/_parser.pyx":510
  *                 buffer_start = match_start
  * 
  *         if idx - buffer_start > 0:             # <<<<<<<<<<<<<<
@@ -17914,7 +18187,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
   __pyx_t_9 = ((__pyx_v_idx - __pyx_v_buffer_start) > 0);
   if (__pyx_t_9) {
 
-    /* "streaming_form_data/_parser.pyx":494
+    /* "streaming_form_data/_parser.pyx":511
  * 
  *         if idx - buffer_start > 0:
  *             self._leftover_buffer = chunk[buffer_start: idx]             # <<<<<<<<<<<<<<
@@ -17923,9 +18196,9 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
     if (unlikely(__pyx_v_chunk == Py_None)) {
       PyErr_SetString(PyExc_TypeError, "'NoneType' object is not subscriptable");
-      __PYX_ERR(0, 494, __pyx_L1_error)
+      __PYX_ERR(0, 511, __pyx_L1_error)
     }
-    __pyx_t_7 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, __pyx_v_idx); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 494, __pyx_L1_error)
+    __pyx_t_7 = PySequence_GetSlice(__pyx_v_chunk, __pyx_v_buffer_start, __pyx_v_idx); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 511, __pyx_L1_error)
     __Pyx_GOTREF(__pyx_t_7);
     __Pyx_GIVEREF(__pyx_t_7);
     __Pyx_GOTREF(__pyx_v_self->_leftover_buffer);
@@ -17933,7 +18206,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
     __pyx_v_self->_leftover_buffer = ((PyObject*)__pyx_t_7);
     __pyx_t_7 = 0;
 
-    /* "streaming_form_data/_parser.pyx":493
+    /* "streaming_form_data/_parser.pyx":510
  *                 buffer_start = match_start
  * 
  *         if idx - buffer_start > 0:             # <<<<<<<<<<<<<<
@@ -17942,7 +18215,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":496
+  /* "streaming_form_data/_parser.pyx":513
  *             self._leftover_buffer = chunk[buffer_start: idx]
  * 
  *         return ErrorCode.E_OK             # <<<<<<<<<<<<<<
@@ -17950,14 +18223,14 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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  */
   __Pyx_XDECREF(__pyx_r);
-  __pyx_t_7 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_OK); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 496, __pyx_L1_error)
+  __pyx_t_7 = __Pyx_Enum_77593a__19streaming_form_data_7_parser_enum__dunderpyx_t_19streaming_form_data_7_parser_ErrorCode__etc_to_py(__pyx_e_19streaming_form_data_7_parser_E_OK); if (unlikely(!__pyx_t_7)) __PYX_ERR(0, 513, __pyx_L1_error)
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   __pyx_t_7 = 0;
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-  /* "streaming_form_data/_parser.pyx":290
- *         return (chunk, index)
+  /* "streaming_form_data/_parser.pyx":311
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  * 
  *     def _parse(self, bytes chunk, size_t index):             # <<<<<<<<<<<<<<
  *         cdef size_t idx, buffer_start, chunk_len
@@ -17983,7 +18256,7 @@ static PyObject *__pyx_pf_19streaming_form_data_7_parser_7_Parser_24_parse(struc
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 }
 
-/* "streaming_form_data/_parser.pyx":498
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  *     cdef size_t rewind_fast_forward(             # <<<<<<<<<<<<<<
@@ -18005,7 +18278,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("rewind_fast_forward", 1);
 
-  /* "streaming_form_data/_parser.pyx":511
+  /* "streaming_form_data/_parser.pyx":528
  * 
  *         # we need at least 4 characters in buffer
  *         if pos_first + 3 > pos_last:             # <<<<<<<<<<<<<<
@@ -18015,7 +18288,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
   __pyx_t_1 = ((__pyx_v_pos_first + 3) > __pyx_v_pos_last);
   if (__pyx_t_1) {
 
-    /* "streaming_form_data/_parser.pyx":512
+    /* "streaming_form_data/_parser.pyx":529
  *         # we need at least 4 characters in buffer
  *         if pos_first + 3 > pos_last:
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@@ -18025,7 +18298,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
     __pyx_r = 0;
     goto __pyx_L0;
 
-    /* "streaming_form_data/_parser.pyx":511
+    /* "streaming_form_data/_parser.pyx":528
  * 
  *         # we need at least 4 characters in buffer
  *         if pos_first + 3 > pos_last:             # <<<<<<<<<<<<<<
@@ -18034,7 +18307,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   }
 
-  /* "streaming_form_data/_parser.pyx":516
+  /* "streaming_form_data/_parser.pyx":533
  *         # calculate pointer to the first character of the buffer and the
  *         # pointer to a character after the end of the buffer
  *         ptr = chunk_ptr + pos_first + 3             # <<<<<<<<<<<<<<
@@ -18043,7 +18316,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
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   __pyx_v_ptr = ((__pyx_v_chunk_ptr + __pyx_v_pos_first) + 3);
 
-  /* "streaming_form_data/_parser.pyx":517
+  /* "streaming_form_data/_parser.pyx":534
  *         # pointer to a character after the end of the buffer
  *         ptr = chunk_ptr + pos_first + 3
  *         ptr_end = chunk_ptr + pos_last + 1             # <<<<<<<<<<<<<<
@@ -18052,7 +18325,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   __pyx_v_ptr_end = ((__pyx_v_chunk_ptr + __pyx_v_pos_last) + 1);
 
-  /* "streaming_form_data/_parser.pyx":518
+  /* "streaming_form_data/_parser.pyx":535
  *         ptr = chunk_ptr + pos_first + 3
  *         ptr_end = chunk_ptr + pos_last + 1
  *         skipped = 0             # <<<<<<<<<<<<<<
@@ -18061,7 +18334,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   __pyx_v_skipped = 0;
 
-  /* "streaming_form_data/_parser.pyx":525
+  /* "streaming_form_data/_parser.pyx":542
  *         # is found.
  * 
  *         while True:             # <<<<<<<<<<<<<<
@@ -18070,7 +18343,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
   while (1) {
 
-    /* "streaming_form_data/_parser.pyx":526
+    /* "streaming_form_data/_parser.pyx":543
  * 
  *         while True:
  *             if ptr >= ptr_end:             # <<<<<<<<<<<<<<
@@ -18080,7 +18353,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
     __pyx_t_1 = (__pyx_v_ptr >= __pyx_v_ptr_end);
     if (__pyx_t_1) {
 
-      /* "streaming_form_data/_parser.pyx":529
+      /* "streaming_form_data/_parser.pyx":546
  *                 # normalize pointer value because we could jump few characters
  *                 # past the buffer end
  *                 ptr = ptr_end - 1             # <<<<<<<<<<<<<<
@@ -18089,7 +18362,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       __pyx_v_ptr = (__pyx_v_ptr_end - 1);
 
-      /* "streaming_form_data/_parser.pyx":534
+      /* "streaming_form_data/_parser.pyx":551
  *                 # keep up to 3 characters in the buffer until next chunk
  *                 # guess we will skip all characters in the buffer
  *                 skipped = pos_last - pos_first + 1             # <<<<<<<<<<<<<<
@@ -18098,7 +18371,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       __pyx_v_skipped = ((__pyx_v_pos_last - __pyx_v_pos_first) + 1);
 
-      /* "streaming_form_data/_parser.pyx":536
+      /* "streaming_form_data/_parser.pyx":553
  *                 skipped = pos_last - pos_first + 1
  * 
  *                 if ptr[0] == c_cr:             # <<<<<<<<<<<<<<
@@ -18108,7 +18381,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       __pyx_t_1 = ((__pyx_v_ptr[0]) == __pyx_v_19streaming_form_data_7_parser_c_cr);
       if (__pyx_t_1) {
 
-        /* "streaming_form_data/_parser.pyx":537
+        /* "streaming_form_data/_parser.pyx":554
  * 
  *                 if ptr[0] == c_cr:
  *                     skipped = skipped - 1             # <<<<<<<<<<<<<<
@@ -18117,7 +18390,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         __pyx_v_skipped = (__pyx_v_skipped - 1);
 
-        /* "streaming_form_data/_parser.pyx":536
+        /* "streaming_form_data/_parser.pyx":553
  *                 skipped = pos_last - pos_first + 1
  * 
  *                 if ptr[0] == c_cr:             # <<<<<<<<<<<<<<
@@ -18127,7 +18400,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L7;
       }
 
-      /* "streaming_form_data/_parser.pyx":538
+      /* "streaming_form_data/_parser.pyx":555
  *                 if ptr[0] == c_cr:
  *                     skipped = skipped - 1
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:             # <<<<<<<<<<<<<<
@@ -18145,7 +18418,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       __pyx_L8_bool_binop_done:;
       if (__pyx_t_1) {
 
-        /* "streaming_form_data/_parser.pyx":539
+        /* "streaming_form_data/_parser.pyx":556
  *                     skipped = skipped - 1
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:
  *                     skipped = skipped - 2             # <<<<<<<<<<<<<<
@@ -18154,7 +18427,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         __pyx_v_skipped = (__pyx_v_skipped - 2);
 
-        /* "streaming_form_data/_parser.pyx":538
+        /* "streaming_form_data/_parser.pyx":555
  *                 if ptr[0] == c_cr:
  *                     skipped = skipped - 1
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:             # <<<<<<<<<<<<<<
@@ -18164,7 +18437,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L7;
       }
 
-      /* "streaming_form_data/_parser.pyx":541
+      /* "streaming_form_data/_parser.pyx":558
  *                     skipped = skipped - 2
  *                 elif (
  *                     ptr[0] == c_hyphen             # <<<<<<<<<<<<<<
@@ -18178,7 +18451,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L10_bool_binop_done;
       }
 
-      /* "streaming_form_data/_parser.pyx":542
+      /* "streaming_form_data/_parser.pyx":559
  *                 elif (
  *                     ptr[0] == c_hyphen
  *                     and ptr[-1] == c_lf             # <<<<<<<<<<<<<<
@@ -18192,7 +18465,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L10_bool_binop_done;
       }
 
-      /* "streaming_form_data/_parser.pyx":543
+      /* "streaming_form_data/_parser.pyx":560
  *                     ptr[0] == c_hyphen
  *                     and ptr[-1] == c_lf
  *                     and ptr[-2] == c_cr             # <<<<<<<<<<<<<<
@@ -18203,7 +18476,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       __pyx_t_1 = __pyx_t_2;
       __pyx_L10_bool_binop_done:;
 
-      /* "streaming_form_data/_parser.pyx":540
+      /* "streaming_form_data/_parser.pyx":557
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:
  *                     skipped = skipped - 2
  *                 elif (             # <<<<<<<<<<<<<<
@@ -18212,7 +18485,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       if (__pyx_t_1) {
 
-        /* "streaming_form_data/_parser.pyx":545
+        /* "streaming_form_data/_parser.pyx":562
  *                     and ptr[-2] == c_cr
  *                 ):
  *                     skipped = skipped - 3             # <<<<<<<<<<<<<<
@@ -18221,7 +18494,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         __pyx_v_skipped = (__pyx_v_skipped - 3);
 
-        /* "streaming_form_data/_parser.pyx":540
+        /* "streaming_form_data/_parser.pyx":557
  *                 elif ptr[0] == c_lf and ptr[-1] == c_cr:
  *                     skipped = skipped - 2
  *                 elif (             # <<<<<<<<<<<<<<
@@ -18231,7 +18504,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       }
       __pyx_L7:;
 
-      /* "streaming_form_data/_parser.pyx":546
+      /* "streaming_form_data/_parser.pyx":563
  *                 ):
  *                     skipped = skipped - 3
  *                 break             # <<<<<<<<<<<<<<
@@ -18240,7 +18513,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       goto __pyx_L5_break;
 
-      /* "streaming_form_data/_parser.pyx":526
+      /* "streaming_form_data/_parser.pyx":543
  * 
  *         while True:
  *             if ptr >= ptr_end:             # <<<<<<<<<<<<<<
@@ -18249,7 +18522,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
     }
 
-    /* "streaming_form_data/_parser.pyx":548
+    /* "streaming_form_data/_parser.pyx":565
  *                 break
  * 
  *             if ptr[0] != c_hyphen:             # <<<<<<<<<<<<<<
@@ -18259,7 +18532,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
     __pyx_t_1 = ((__pyx_v_ptr[0]) != __pyx_v_19streaming_form_data_7_parser_c_hyphen);
     if (__pyx_t_1) {
 
-      /* "streaming_form_data/_parser.pyx":549
+      /* "streaming_form_data/_parser.pyx":566
  * 
  *             if ptr[0] != c_hyphen:
  *                 ptr += 2             # <<<<<<<<<<<<<<
@@ -18268,7 +18541,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
       __pyx_v_ptr = (__pyx_v_ptr + 2);
 
-      /* "streaming_form_data/_parser.pyx":548
+      /* "streaming_form_data/_parser.pyx":565
  *                 break
  * 
  *             if ptr[0] != c_hyphen:             # <<<<<<<<<<<<<<
@@ -18278,7 +18551,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       goto __pyx_L13;
     }
 
-    /* "streaming_form_data/_parser.pyx":551
+    /* "streaming_form_data/_parser.pyx":568
  *                 ptr += 2
  *             else:
  *                 if ptr[-1] != c_hyphen:             # <<<<<<<<<<<<<<
@@ -18289,7 +18562,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
       __pyx_t_1 = ((__pyx_v_ptr[-1L]) != __pyx_v_19streaming_form_data_7_parser_c_hyphen);
       if (__pyx_t_1) {
 
-        /* "streaming_form_data/_parser.pyx":552
+        /* "streaming_form_data/_parser.pyx":569
  *             else:
  *                 if ptr[-1] != c_hyphen:
  *                     ptr += 1             # <<<<<<<<<<<<<<
@@ -18298,7 +18571,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         __pyx_v_ptr = (__pyx_v_ptr + 1);
 
-        /* "streaming_form_data/_parser.pyx":551
+        /* "streaming_form_data/_parser.pyx":568
  *                 ptr += 2
  *             else:
  *                 if ptr[-1] != c_hyphen:             # <<<<<<<<<<<<<<
@@ -18308,7 +18581,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         goto __pyx_L14;
       }
 
-      /* "streaming_form_data/_parser.pyx":554
+      /* "streaming_form_data/_parser.pyx":571
  *                     ptr += 1
  *                 else:
  *                     if ptr[-2] == c_lf and ptr[-3] == c_cr:             # <<<<<<<<<<<<<<
@@ -18327,117 +18600,117 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
         __pyx_L16_bool_binop_done:;
         if (__pyx_t_1) {
 
-          /* "streaming_form_data/_parser.pyx":555
+          /* "streaming_form_data/_parser.pyx":572
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  *                     if ptr[-2] == c_lf and ptr[-3] == c_cr:
  *                         self.delimiter_finder.reset()             # <<<<<<<<<<<<<<
  *                         self.delimiter_finder.feed(c_cr)
  *                         self.delimiter_finder.feed(c_lf)
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->reset(__pyx_v_self->delimiter_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 555, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->reset(__pyx_v_self->delimiter_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 572, __pyx_L1_error)
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           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":556
+          /* "streaming_form_data/_parser.pyx":573
  *                     if ptr[-2] == c_lf and ptr[-3] == c_cr:
  *                         self.delimiter_finder.reset()
  *                         self.delimiter_finder.feed(c_cr)             # <<<<<<<<<<<<<<
  *                         self.delimiter_finder.feed(c_lf)
  *                         self.delimiter_finder.feed(c_hyphen)
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 556, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 573, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":557
+          /* "streaming_form_data/_parser.pyx":574
  *                         self.delimiter_finder.reset()
  *                         self.delimiter_finder.feed(c_cr)
  *                         self.delimiter_finder.feed(c_lf)             # <<<<<<<<<<<<<<
  *                         self.delimiter_finder.feed(c_hyphen)
  *                         self.delimiter_finder.feed(c_hyphen)
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 557, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 574, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":558
+          /* "streaming_form_data/_parser.pyx":575
  *                         self.delimiter_finder.feed(c_cr)
  *                         self.delimiter_finder.feed(c_lf)
  *                         self.delimiter_finder.feed(c_hyphen)             # <<<<<<<<<<<<<<
  *                         self.delimiter_finder.feed(c_hyphen)
  * 
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 558, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 575, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":559
+          /* "streaming_form_data/_parser.pyx":576
  *                         self.delimiter_finder.feed(c_lf)
  *                         self.delimiter_finder.feed(c_hyphen)
  *                         self.delimiter_finder.feed(c_hyphen)             # <<<<<<<<<<<<<<
  * 
  *                         self.ender_finder.reset()
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 559, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->delimiter_finder->__pyx_vtab)->feed(__pyx_v_self->delimiter_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 576, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":561
+          /* "streaming_form_data/_parser.pyx":578
  *                         self.delimiter_finder.feed(c_hyphen)
  * 
  *                         self.ender_finder.reset()             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_cr)
  *                         self.ender_finder.feed(c_lf)
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 561, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->reset(__pyx_v_self->ender_finder); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 578, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":562
+          /* "streaming_form_data/_parser.pyx":579
  * 
  *                         self.ender_finder.reset()
  *                         self.ender_finder.feed(c_cr)             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_lf)
  *                         self.ender_finder.feed(c_hyphen)
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 562, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_cr, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 579, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":563
+          /* "streaming_form_data/_parser.pyx":580
  *                         self.ender_finder.reset()
  *                         self.ender_finder.feed(c_cr)
  *                         self.ender_finder.feed(c_lf)             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_hyphen)
  *                         self.ender_finder.feed(c_hyphen)
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 563, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_lf, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 580, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":564
+          /* "streaming_form_data/_parser.pyx":581
  *                         self.ender_finder.feed(c_cr)
  *                         self.ender_finder.feed(c_lf)
  *                         self.ender_finder.feed(c_hyphen)             # <<<<<<<<<<<<<<
  *                         self.ender_finder.feed(c_hyphen)
  * 
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 564, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 581, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":565
+          /* "streaming_form_data/_parser.pyx":582
  *                         self.ender_finder.feed(c_lf)
  *                         self.ender_finder.feed(c_hyphen)
  *                         self.ender_finder.feed(c_hyphen)             # <<<<<<<<<<<<<<
  * 
  *                         skipped = (ptr - chunk_ptr) - pos_first + 1
  */
-          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 565, __pyx_L1_error)
+          __pyx_t_3 = ((struct __pyx_vtabstruct_19streaming_form_data_7_parser_Finder *)__pyx_v_self->ender_finder->__pyx_vtab)->feed(__pyx_v_self->ender_finder, __pyx_v_19streaming_form_data_7_parser_c_hyphen, 0); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 582, __pyx_L1_error)
           __Pyx_GOTREF(__pyx_t_3);
           __Pyx_DECREF(__pyx_t_3); __pyx_t_3 = 0;
 
-          /* "streaming_form_data/_parser.pyx":567
+          /* "streaming_form_data/_parser.pyx":584
  *                         self.ender_finder.feed(c_hyphen)
  * 
  *                         skipped = (ptr - chunk_ptr) - pos_first + 1             # <<<<<<<<<<<<<<
@@ -18446,7 +18719,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
           __pyx_v_skipped = (((__pyx_v_ptr - __pyx_v_chunk_ptr) - __pyx_v_pos_first) + 1);
 
-          /* "streaming_form_data/_parser.pyx":569
+          /* "streaming_form_data/_parser.pyx":586
  *                         skipped = (ptr - chunk_ptr) - pos_first + 1
  * 
  *                         break             # <<<<<<<<<<<<<<
@@ -18455,7 +18728,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
           goto __pyx_L5_break;
 
-          /* "streaming_form_data/_parser.pyx":554
+          /* "streaming_form_data/_parser.pyx":571
  *                     ptr += 1
  *                 else:
  *                     if ptr[-2] == c_lf and ptr[-3] == c_cr:             # <<<<<<<<<<<<<<
@@ -18464,7 +18737,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
  */
         }
 
-        /* "streaming_form_data/_parser.pyx":570
+        /* "streaming_form_data/_parser.pyx":587
  * 
  *                         break
  *                     ptr += 4             # <<<<<<<<<<<<<<
@@ -18479,7 +18752,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
   }
   __pyx_L5_break:;
 
-  /* "streaming_form_data/_parser.pyx":572
+  /* "streaming_form_data/_parser.pyx":589
  *                     ptr += 4
  * 
  *         return skipped             # <<<<<<<<<<<<<<
@@ -18489,7 +18762,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
   __pyx_r = __pyx_v_skipped;
   goto __pyx_L0;
 
-  /* "streaming_form_data/_parser.pyx":498
+  /* "streaming_form_data/_parser.pyx":515
  *         return ErrorCode.E_OK
  * 
  *     cdef size_t rewind_fast_forward(             # <<<<<<<<<<<<<<
@@ -18507,7 +18780,7 @@ static size_t __pyx_f_19streaming_form_data_7_parser_7_Parser_rewind_fast_forwar
   return __pyx_r;
 }
 
-/* "streaming_form_data/_parser.pyx":574
+/* "streaming_form_data/_parser.pyx":591
  *         return skipped
  * 
  *     cdef mark_error(self):             # <<<<<<<<<<<<<<
@@ -18530,7 +18803,7 @@ static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_mark_error(stru
   int __pyx_clineno = 0;
   __Pyx_RefNannySetupContext("mark_error", 1);
 
-  /* "streaming_form_data/_parser.pyx":575
+  /* "streaming_form_data/_parser.pyx":592
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  *     cdef mark_error(self):
  *         self.state = ParserState.PS_ERROR             # <<<<<<<<<<<<<<
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   __pyx_v_self->state = __pyx_e_19streaming_form_data_7_parser_PS_ERROR;
 
-  /* "streaming_form_data/_parser.pyx":577
+  /* "streaming_form_data/_parser.pyx":594
  *         self.state = ParserState.PS_ERROR
  * 
  *         if self.active_part:             # <<<<<<<<<<<<<<
- *             if isinstance(self.active_part, Part):
+ *             if self.active_part.is_sync():
  *                 self.active_part.finish()
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-  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_self->active_part); if (unlikely((__pyx_t_1 < 0))) __PYX_ERR(0, 577, __pyx_L1_error)
+  __pyx_t_1 = __Pyx_PyObject_IsTrue(__pyx_v_self->active_part); if (unlikely((__pyx_t_1 < 0))) __PYX_ERR(0, 594, __pyx_L1_error)
   if (__pyx_t_1) {
 
-    /* "streaming_form_data/_parser.pyx":578
+    /* "streaming_form_data/_parser.pyx":595
  * 
  *         if self.active_part:
- *             if isinstance(self.active_part, Part):             # <<<<<<<<<<<<<<
+ *             if self.active_part.is_sync():             # <<<<<<<<<<<<<<
  *                 self.active_part.finish()
  *             else:
  */
-    __pyx_t_2 = __pyx_v_self->active_part;
-    __Pyx_INCREF(__pyx_t_2);
-    __pyx_t_1 = __Pyx_TypeCheck(__pyx_t_2, __pyx_ptype_19streaming_form_data_7_parser_Part); 
+    __pyx_t_3 = __Pyx_PyObject_GetAttrStr(__pyx_v_self->active_part, __pyx_n_s_is_sync); if (unlikely(!__pyx_t_3)) __PYX_ERR(0, 595, __pyx_L1_error)
+    __Pyx_GOTREF(__pyx_t_3);
+    __pyx_t_4 = NULL;
+    __pyx_t_5 = 0;
+    #if CYTHON_UNPACK_METHODS
+    if (likely(PyMethod_Check(__pyx_t_3))) {
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  * 
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- *             if isinstance(self.active_part, Part):
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  */
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+ */
+
+static PyObject *__pyx_f_19streaming_form_data_7_parser_7_Parser_has_error(struct __pyx_obj_19streaming_form_data_7_parser__Parser *__pyx_v_self) {
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+  /* function exit code */
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@@ -21878,6 +22221,7 @@ static PyTypeObject __pyx_type_19streaming_form_data_7_parser_Finder = {
   #endif
 };
 #endif
+static struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part __pyx_vtable_19streaming_form_data_7_parser__Part;
 
 static PyObject *__pyx_tp_new_19streaming_form_data_7_parser__Part(PyTypeObject *t, CYTHON_UNUSED PyObject *a, CYTHON_UNUSED PyObject *k) {
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   if (unlikely(!o)) return 0;
   #endif
   p = ((struct __pyx_obj_19streaming_form_data_7_parser__Part *)o);
+  p->__pyx_vtab = __pyx_vtabptr_19streaming_form_data_7_parser__Part;
   p->name = ((PyObject*)Py_None); Py_INCREF(Py_None);
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 static PyType_Slot __pyx_type_19streaming_form_data_7_parser__Part_slots[] = {
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-  {Py_tp_doc, (void *)PyDoc_STR("One part of a multipart/form-data request\n    ")},
+  {Py_tp_doc, (void *)PyDoc_STR("\n    A single part of a multipart/form-data request\n    ")},
   {Py_tp_traverse, (void *)__pyx_tp_traverse_19streaming_form_data_7_parser__Part},
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-  PyDoc_STR("One part of a multipart/form-data request\n    "), /*tp_doc*/
+  PyDoc_STR("\n    A single part of a multipart/form-data request\n    "), /*tp_doc*/
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   0, /*tp_richcompare*/
@@ -22067,6 +22412,16 @@ static PyTypeObject __pyx_type_19streaming_form_data_7_parser__Part = {
   #endif
 };
 #endif
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+
+static PyObject *__pyx_tp_new_19streaming_form_data_7_parser_Part(PyTypeObject *t, PyObject *a, PyObject *k) {
+  struct __pyx_obj_19streaming_form_data_7_parser_Part *p;
+  PyObject *o = __pyx_tp_new_19streaming_form_data_7_parser__Part(t, a, k);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_19streaming_form_data_7_parser_Part *)o);
+  p->__pyx_base.__pyx_vtab = (struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part*)__pyx_vtabptr_19streaming_form_data_7_parser_Part;
+  return o;
+}
 
 static PyMethodDef __pyx_methods_19streaming_form_data_7_parser_Part[] = {
   {"start", (PyCFunction)(void*)(__Pyx_PyCFunction_FastCallWithKeywords)__pyx_pw_19streaming_form_data_7_parser_4Part_1start, __Pyx_METH_FASTCALL|METH_KEYWORDS, 0},
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   {Py_tp_clear, (void *)__pyx_tp_clear_19streaming_form_data_7_parser__Part},
   {Py_tp_methods, (void *)__pyx_methods_19streaming_form_data_7_parser_Part},
-  {Py_tp_new, (void *)__pyx_tp_new_19streaming_form_data_7_parser__Part},
+  {Py_tp_new, (void *)__pyx_tp_new_19streaming_form_data_7_parser_Part},
   {0, 0},
 };
 static PyType_Spec __pyx_type_19streaming_form_data_7_parser_Part_spec = {
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   0, /*tp_init*/
   #endif
   0, /*tp_alloc*/
-  __pyx_tp_new_19streaming_form_data_7_parser__Part, /*tp_new*/
+  __pyx_tp_new_19streaming_form_data_7_parser_Part, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
@@ -22178,6 +22533,16 @@ static PyTypeObject __pyx_type_19streaming_form_data_7_parser_Part = {
   #endif
 };
 #endif
+static struct __pyx_vtabstruct_19streaming_form_data_7_parser_AsyncPart __pyx_vtable_19streaming_form_data_7_parser_AsyncPart;
+
+static PyObject *__pyx_tp_new_19streaming_form_data_7_parser_AsyncPart(PyTypeObject *t, PyObject *a, PyObject *k) {
+  struct __pyx_obj_19streaming_form_data_7_parser_AsyncPart *p;
+  PyObject *o = __pyx_tp_new_19streaming_form_data_7_parser__Part(t, a, k);
+  if (unlikely(!o)) return 0;
+  p = ((struct __pyx_obj_19streaming_form_data_7_parser_AsyncPart *)o);
+  p->__pyx_base.__pyx_vtab = (struct __pyx_vtabstruct_19streaming_form_data_7_parser__Part*)__pyx_vtabptr_19streaming_form_data_7_parser_AsyncPart;
+  return o;
+}
 
 static PyMethodDef __pyx_methods_19streaming_form_data_7_parser_AsyncPart[] = {
   {"start", (PyCFunction)(void*)(__Pyx_PyCFunction_FastCallWithKeywords)__pyx_pw_19streaming_form_data_7_parser_9AsyncPart_1start, __Pyx_METH_FASTCALL|METH_KEYWORDS, 0},
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   {Py_tp_methods, (void *)__pyx_methods_19streaming_form_data_7_parser_AsyncPart},
-  {Py_tp_new, (void *)__pyx_tp_new_19streaming_form_data_7_parser__Part},
+  {Py_tp_new, (void *)__pyx_tp_new_19streaming_form_data_7_parser_AsyncPart},
   {0, 0},
 };
 static PyType_Spec __pyx_type_19streaming_form_data_7_parser_AsyncPart_spec = {
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   #endif
   0, /*tp_alloc*/
-  __pyx_tp_new_19streaming_form_data_7_parser__Part, /*tp_new*/
+  __pyx_tp_new_19streaming_form_data_7_parser_AsyncPart, /*tp_new*/
   0, /*tp_free*/
   0, /*tp_is_gc*/
   0, /*tp_bases*/
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     {&__pyx_n_s_IntFlag, __pyx_k_IntFlag, sizeof(__pyx_k_IntFlag), 0, 0, 1, 1},
+    {&__pyx_n_s_NotImplementedError, __pyx_k_NotImplementedError, sizeof(__pyx_k_NotImplementedError), 0, 0, 1, 1},
     {&__pyx_n_s_NullTarget, __pyx_k_NullTarget, sizeof(__pyx_k_NullTarget), 0, 0, 1, 1},
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     {&__pyx_n_s_is_coroutine, __pyx_k_is_coroutine, sizeof(__pyx_k_is_coroutine), 0, 0, 1, 1},
+    {&__pyx_n_s_is_sync, __pyx_k_is_sync, sizeof(__pyx_k_is_sync), 0, 0, 1, 1},
     {&__pyx_kp_u_isenabled, __pyx_k_isenabled, sizeof(__pyx_k_isenabled), 0, 1, 0, 0},
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-  /* "streaming_form_data/_parser.pyx":134
+  /* "streaming_form_data/_parser.pyx":135
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-  /* "streaming_form_data/_parser.pyx":137
+  /* "streaming_form_data/_parser.pyx":138
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-  __pyx_tuple__41 = PyTuple_Pack(3, __pyx_n_s_self, __pyx_n_s_value, __pyx_n_s_target); if (unlikely(!__pyx_tuple__41)) __PYX_ERR(0, 137, __pyx_L1_error)
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-  /* "streaming_form_data/_parser.pyx":141
+  /* "streaming_form_data/_parser.pyx":142
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   /* "(tree fragment)":1
  * def __reduce_cython__(self):             # <<<<<<<<<<<<<<
@@ -24294,35 +24662,35 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
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-  /* "streaming_form_data/_parser.pyx":147
+  /* "streaming_form_data/_parser.pyx":151
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-  /* "streaming_form_data/_parser.pyx":151
+  /* "streaming_form_data/_parser.pyx":155
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-  /* "streaming_form_data/_parser.pyx":155
+  /* "streaming_form_data/_parser.pyx":159
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   /* "(tree fragment)":1
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@@ -24339,32 +24707,32 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
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-  /* "streaming_form_data/_parser.pyx":161
+  /* "streaming_form_data/_parser.pyx":168
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-  /* "streaming_form_data/_parser.pyx":165
+  /* "streaming_form_data/_parser.pyx":172
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  *     async def data_received(self, bytes chunk):             # <<<<<<<<<<<<<<
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-  /* "streaming_form_data/_parser.pyx":169
+  /* "streaming_form_data/_parser.pyx":176
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   /* "(tree fragment)":1
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@@ -24381,110 +24749,110 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
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-  /* "streaming_form_data/_parser.pyx":207
+  /* "streaming_form_data/_parser.pyx":217
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  *     def register(self, str name, object target):             # <<<<<<<<<<<<<<
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-  /* "streaming_form_data/_parser.pyx":216
+  /* "streaming_form_data/_parser.pyx":226
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  *     def set_active_part(self, part, str filename):             # <<<<<<<<<<<<<<
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-  /* "streaming_form_data/_parser.pyx":221
+  /* "streaming_form_data/_parser.pyx":231
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  *     async def async_set_active_part(self, part, str filename):             # <<<<<<<<<<<<<<
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-  /* "streaming_form_data/_parser.pyx":226
+  /* "streaming_form_data/_parser.pyx":236
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  *     def unset_active_part(self):             # <<<<<<<<<<<<<<
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-  /* "streaming_form_data/_parser.pyx":231
+  /* "streaming_form_data/_parser.pyx":241
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  *     async def async_unset_active_part(self):             # <<<<<<<<<<<<<<
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-  /* "streaming_form_data/_parser.pyx":249
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  *                 return part
  * 
  *     def data_received(self, bytes data):             # <<<<<<<<<<<<<<
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  *             return ErrorCode.E_OK
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-  /* "streaming_form_data/_parser.pyx":260
+  /* "streaming_form_data/_parser.pyx":270
  *         return self._parse(chunk, index)
  * 
  *     async def async_data_received(self, bytes data):             # <<<<<<<<<<<<<<
  *         if not data:
  *             return ErrorCode.E_OK
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+  if (__Pyx_SetItemOnTypeDict((PyObject *)__pyx_ptype_19streaming_form_data_7_parser__Parser, __pyx_n_s_async_data_received, __pyx_t_6) < 0) __PYX_ERR(0, 270, __pyx_L1_error)
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   PyType_Modified(__pyx_ptype_19streaming_form_data_7_parser__Parser);
 
-  /* "streaming_form_data/_parser.pyx":290
- *         return (chunk, index)
+  /* "streaming_form_data/_parser.pyx":311
+ *             self.mark_error()
  * 
  *     def _parse(self, bytes chunk, size_t index):             # <<<<<<<<<<<<<<
  *         cdef size_t idx, buffer_start, chunk_len
  *         cdef size_t match_start, skip_count, matched_length
  */
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+  __pyx_t_6 = __Pyx_CyFunction_New(&__pyx_mdef_19streaming_form_data_7_parser_7_Parser_25_parse, __Pyx_CYFUNCTION_CCLASS, __pyx_n_s_Parser__parse, NULL, __pyx_n_s_streaming_form_data__parser, __pyx_d, ((PyObject *)__pyx_codeobj__64)); if (unlikely(!__pyx_t_6)) __PYX_ERR(0, 311, __pyx_L1_error)
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+  if (__Pyx_SetItemOnTypeDict((PyObject *)__pyx_ptype_19streaming_form_data_7_parser__Parser, __pyx_n_s_parse, __pyx_t_6) < 0) __PYX_ERR(0, 311, __pyx_L1_error)
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@@ -28236,6 +28626,12 @@ static int __Pyx__ArgTypeTest(PyObject *obj, PyTypeObject *type, const char *nam
     return 0;
 }
 
+/* PyObjectCallNoArg */
+static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func) {
+    PyObject *arg[2] = {NULL, NULL};
+    return __Pyx_PyObject_FastCall(func, arg + 1, 0 | __Pyx_PY_VECTORCALL_ARGUMENTS_OFFSET);
+}
+
 /* FixUpExtensionType */
 #if CYTHON_USE_TYPE_SPECS
 static int __Pyx_fix_up_extension_type_from_spec(PyType_Spec *spec, PyTypeObject *type) {
@@ -28686,12 +29082,6 @@ static PyObject* __Pyx_PyObject_CallMethod1(PyObject* obj, PyObject* method_name
 #endif
 }
 
-/* PyObjectCallNoArg */
-static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func) {
-    PyObject *arg[2] = {NULL, NULL};
-    return __Pyx_PyObject_FastCall(func, arg + 1, 0 | __Pyx_PY_VECTORCALL_ARGUMENTS_OFFSET);
-}
-
 /* CoroutineBase */
 #include <frameobject.h>
 #if PY_VERSION_HEX >= 0x030b00a6
diff --git a/streaming_form_data/_parser.pyx b/streaming_form_data/_parser.pyx
index b050c50f..a3d80231 100644
--- a/streaming_form_data/_parser.pyx
+++ b/streaming_form_data/_parser.pyx
@@ -121,7 +121,8 @@ cdef class Finder:
 
 
 cdef class _Part:
-    """One part of a multipart/form-data request
+    """
+    A single part of a multipart/form-data request
     """
 
     cdef public str name
@@ -142,6 +143,9 @@ cdef class _Part:
         for target in self.targets:
             target.multipart_content_type = value
 
+    cdef is_sync(self):
+        raise NotImplementedError()
+
 
 cdef class Part(_Part):
     def start(self):
@@ -156,6 +160,9 @@ cdef class Part(_Part):
         for target in self.targets:
             target.finish()
 
+    cdef is_sync(self):
+        return True
+
 
 cdef class AsyncPart(_Part):
     async def start(self):
@@ -170,6 +177,9 @@ cdef class AsyncPart(_Part):
         for target in self.targets:
             await target.finish()
 
+    cdef is_sync(self):
+        return False
+
 
 cdef class _Parser:
     cdef ParserState state
@@ -287,6 +297,17 @@ cdef class _Parser:
 
         return (chunk, index)
 
+    cdef handle_ps_start(self, const Byte* chunk_ptr, size_t* idx, size_t* buffer_start):
+        cdef Byte byte = chunk_ptr[idx[0]]
+
+        if byte == c_hyphen:
+            buffer_start[0] = idx[0]
+            self.state = ParserState.PS_STARTING_BOUNDARY
+        elif byte == c_cr:
+            self.state = ParserState.PS_START_CR
+        else:
+            self.mark_error()
+
     def _parse(self, bytes chunk, size_t index):
         cdef size_t idx, buffer_start, chunk_len
         cdef size_t match_start, skip_count, matched_length
@@ -302,13 +323,9 @@ cdef class _Parser:
             byte = chunk_ptr[idx]
 
             if self.state == ParserState.PS_START:
-                if byte == c_hyphen:
-                    buffer_start = idx
-                    self.state = ParserState.PS_STARTING_BOUNDARY
-                elif byte == c_cr:
-                    self.state = ParserState.PS_START_CR
-                else:
-                    self.mark_error()
+                self.handle_ps_start(chunk_ptr, &idx, &buffer_start)
+
+                if self.has_error():
                     return ErrorCode.E_DELIMITING
 
             elif self.state == ParserState.PS_START_CR:
@@ -575,7 +592,10 @@ cdef class _Parser:
         self.state = ParserState.PS_ERROR
 
         if self.active_part:
-            if isinstance(self.active_part, Part):
+            if self.active_part.is_sync():
                 self.active_part.finish()
             else:
                 asyncio.get_event_loop().call_soon_threadsafe(self.active_part.finish())
+
+    cdef has_error(self):
+        return self.state == ParserState.PS_ERROR