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xqrs.xqy
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(:
: XQuery API for RESTful Web Services (XQRS)
:
: Version: 1.0.3
: Author: Charles Foster
:
: Copyright 2019 XML London Limited. All rights reserved.
:
: Licensed under the Apache License, Version 2.0 (the "License");
: you may not use this file except in compliance with the License.
: You may obtain a copy of the License at
:
: http://www.apache.org/licenses/LICENSE-2.0
:
: Unless required by applicable law or agreed to in writing, software
: distributed under the License is distributed on an "AS IS" BASIS,
: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
: See the License for the specific language governing permissions and
: limitations under the License.
:)
xquery version "1.0-ml";
(: ------------ Add your own RestXQ module library imports here ------------ :)
import module namespace sem = "http://marklogic.com/semantics"
at "/MarkLogic/semantics.xqy";
declare namespace rest = "http://exquery.org/ns/restxq";
declare namespace output = "http://www.w3.org/2010/xslt-xquery-serialization";
declare namespace http = "http://expath.org/ns/http-client";
declare namespace rerr = "http://exquery.org/ns/restxq/error";
declare variable $error-xsl as xs:string :=
xdmp:get-request-field('xqrs-error-xsl', 'optional-libraries/xqrs-error.xsl');
declare variable $invoking-function-name as xs:string? :=
xdmp:get-request-field("xqrs_fn", ());
declare variable $request-path as xs:string? :=
xdmp:get-request-field("xqrs_rp", xdmp:get-request-path());
declare variable $empty := 1;
declare variable $exactly-one := 2;
declare variable $one-or-more := 3;
declare variable $zero-or-more := 4;
declare variable $zero-or-one := 5;
declare variable $query-param-annotations := rest:param-qnames('query');
declare variable $form-param-annotations := rest:param-qnames('form');
declare variable $header-param-annotations := rest:param-qnames('header');
declare variable $cookie-param-annotations := rest:param-qnames('cookie');
declare variable $error-param-annotations := rest:param-qnames('error');
declare variable $method-triples :=
("n3","nquad","ntriple","rdfjson","rdfxml","trig","triplexml","turtle");
declare variable $method-sparql-results :=
("sparql-results-xml", "sparql-results-json","sparql-results-csv");
declare variable $sequence-level-parameters := (
"byte-order-mark", "doctype-public", "doctype-system", "encoding",
"omit-xml-declaration", "output-encoding", "standalone"
);
declare variable $item-level-parameters := (
"allow-duplicate-names", "cdata-section-elements", "escape-uri-attributes",
"html-version", "include-content-type", "indent", "json-node-output-method",
"media-type", "method", "normalization-form", "supress-indentation",
"undeclare-prefixes", "use-character-maps", "version", "indent-untyped",
"indent-tabs", "default-attributes", "output-sgml-character-entities"
);
declare variable $http-methods :=
("GET","HEAD","POST","PUT","DELETE","OPTIONS","PATCH","CONNECT","TRACE");
declare variable $accept as map:map* :=
rest:http-header-value-params(xdmp:get-request-header('Accept'));
declare variable $cookies as map:map* :=
rest:http-header-value-params(xdmp:get-request-header('Cookie'));
declare variable $content-type-header :=
xdmp:get-request-header('Content-Type');
declare variable $output-method-rdf-mime-types :=
map:entry("n3", "text/n3") =>
map:with("nquad", "application/n-quads") =>
map:with("ntriple", "application/n-triples") =>
map:with("rdfjson", "application/rdf+json") =>
map:with("rdfxml", "application/rdf+xml") =>
map:with("trig", "application/trig") =>
map:with("triplexml", "application/vnd.marklogic.triples+xml") =>
map:with("turtle", "text/turtle");
declare variable $output-method-default-mime-types := map:new((
$output-method-rdf-mime-types,
map:entry("html", "text/html") =>
map:with("json", "application/json") =>
map:with("sparql-results-csv", "text/csv") =>
map:with("sparql-results-json", "application/sparql-results+json") =>
map:with("sparql-results-xml", "application/sparql-results+xml") =>
map:with("text", "text/plain") =>
map:with("xhtml", "text/html") =>
map:with("xml", "text/xml")
));
declare variable $rdf-mime-to-method := -$output-method-rdf-mime-types;
declare variable $default-value-extractors :=
rest:value-from-path#2, rest:value-from-query-param#2,
rest:value-from-form-param#2, rest:value-from-header-param#2,
rest:value-from-cookie-param#2, rest:value-from-request-body#2;
declare variable $parameter-map as map:map := map:map();
declare option xdmp:mapping "true";
declare function rest:param-qnames($v as xs:string) as xs:QName+ {
(xs:QName('rest:' || $v || '-param'),
(1 to 10) ! (xs:QName('rest:' || $v || '-param-' || .)))
};
declare function rest:occurrence($sequence-type as xs:string) as xs:integer {
switch(fn:substring($sequence-type, string-length($sequence-type)))
case "?" return $zero-or-one
case "+" return $one-or-more
case "*" return $zero-or-more
default return $exactly-one
};
declare function rest:parse-type($sequence-type as xs:string) as map:map {
map:entry('cardinality', rest:occurrence($sequence-type)) =>
map:with('item-type', replace($sequence-type, '[\?\+\*]$', ''))
};
declare function rest:matches-error(
$f as function(*),
$error-map as map:map) as xs:decimal {
let $ann := xdmp:annotation($f,xs:QName('rest:error'))
let $err-qname as xs:QName := map:get($error-map, 'code')
let $marklogic-error-code as xs:string? := (: featureId-errorId :)
map:get($error-map, 'additional')/*/Q{http://marklogic.com/xdmp/error}code
return
if(fn:matches($ann, '^Q\{[^\}]*\}.*$')) then ( (: URI Qualified Name :)
let $namespace := fn:replace($ann, '^Q\{([^\}]*)\}.*$', '$1')
let $localname := fn:replace($ann, '^Q\{[^\}]*\}(.*)$', '$1')
return rest:content-type-match-level(
fn:namespace-uri-from-QName($err-qname),
fn:local-name-from-QName($err-qname),
$namespace, $localname
)
)
else if(fn:contains($ann, ':')) then ( (: QName :)
let $tokens := fn:tokenize($ann, ':')
return rest:content-type-match-level(
fn:prefix-from-QName($err-qname),
fn:local-name-from-QName($err-qname),
$tokens[1], $tokens[2]
)
)
else if(fn:matches($ann, '^([A-Z0-9]+|\*)-([A-Z0-9]+|\*)$')
and
fn:matches($marklogic-error-code, '^([A-Z0-9]+|\*)-([A-Z0-9]+|\*)$'))
then (
(: MarkLogic Proprietary Error Code :)
let $marklogic-error-code := (: featureId-errorId :)
map:get($error-map, 'additional')/*/Q{http://marklogic.com/xdmp/error}code
let $marklogic-error-code-tokens := fn:tokenize($marklogic-error-code, '-')
let $tokens := fn:tokenize($ann, '-')
return rest:content-type-match-level(
$marklogic-error-code-tokens[1], $marklogic-error-code-tokens[2],
$tokens[1], $tokens[2]
)
)
else if($ann = '*') then ( (: Any kind of Error :)
0.5
)
else 0
};
declare function rest:matches($f as function(*)) as xs:integer {
let $functions :=
(rest:matches-path#1, rest:matches-method#1,
rest:matches-consumes#1, rest:matches-produces#1)
let $weights := (10, 10000, 1000, 1000)
return fn:fold-left( (: lazily iterate through match functions, :)
function($prev, $cur) { (: applying and adding weights as we go :)
if($prev = 0) then 0 (: importantly, halting as soon as possible :)
else $functions[$cur]($f) * $weights[$cur] + (($prev, 0)[1])
}, (), 1 to count($weights)
)
};
declare function rest:matches-path($f as function(*)) as xs:integer {
try
{
let $path-ann := xdmp:annotation($f, xs:QName('rest:path'))
let $path-ann := if(starts-with($path-ann, '/')) then $path-ann
else '/' || $path-ann
let $validate :=
rest:assert-annotation-cardinality($f, xs:QName('rest:path'), 1, 1)
let $test := rest:path-variable-map($request-path, $path-ann)
return
if(exists($path-ann) and exists($test)) then
(
let $var-weight := 1
let $con-weight := 100
let $path-normalized := replace($path-ann, "^/", "")
let $path-tokens := tokenize($path-normalized, "/")
return
sum(
for $token at $index in $path-tokens
return (
$con-weight +
(if(matches($token, '\{\$.+\}')) then
$index * $var-weight
else
$con-weight)
)
)
)
else 0
} catch rerr:XQRS001 {
fn:error($err:code,
"The function " || xdmp:function-name($f) ||
" has a path annotation string literal '" ||
xdmp:annotation($f, xs:QName('rest:path'))
|| "' which contains either an invalid or unsupported regular expression.")
}
};
declare function rest:matches-method($f as function(*)) as xs:integer {
let $annotation := function($method) {
xdmp:annotation($f, xs:QName("rest:" || $method))
}
return
if(some $match in ($http-methods ! $annotation(.)) satisfies $match) then
if(exists($annotation(xdmp:get-request-method()))) then 2 else 0
else
1
};
declare function rest:matches-consumes($f as function(*)) as xs:integer {
rest:assert-valid-mediatype($f, xs:QName('rest:consumes')),
let $consumes := xdmp:annotation($f, xs:QName("rest:consumes"))
let $mime := replace(lower-case($content-type-header), '^([^\s;]+).*', '$1')
let $pair := tokenize($mime, '/')
return
if(not($consumes)) then (: no consumes annotation, equiv of */* :)
1
else
fn:max((0,
for $ann in $consumes
let $ann-pair := tokenize($ann, '/')
return rest:content-type-match-level($pair[1], $pair[2],
$ann-pair[1], $ann-pair[2])
))
};
declare function rest:content-type-match-level(
$type1 as xs:string,
$subtype1 as xs:string,
$type2 as xs:string,
$subtype2 as xs:string) as xs:integer {
if($type1 = $type2 and $type1 != "*") then
(
if($subtype1 = $subtype2 and $subtype2 != '*') then 4
else if($subtype1 = '*' or $subtype2 = '*') then 3
else 0
)
else if($type1 = '*' or $type2 = '*') then (
if($subtype1 = $subtype2 and $subtype2 != '*') then 2
else if($subtype2 = '*' or $subtype1 = '*') then 1
else 0
)
else 0
};
declare function rest:matches-produces($f as function(*)) as xs:decimal {
let $_ := rest:assert-valid-mediatype($f, xs:QName('rest:produces'))
let $ann := xdmp:annotation($f, xs:QName('rest:produces'))
return
if(not(exists($ann))) then (
1
) else (
let $levels :=
for $func-produces in $ann
for $cli-accepts-map in $accept
let $cli-accept-content-type := map:get($cli-accepts-map, 'xqrs:title')
return (
let $ann-pair := fn:tokenize($func-produces, '/')
let $pair := fn:tokenize($cli-accept-content-type, '/')
let $match-level := rest:content-type-match-level(
$ann-pair[1], $ann-pair[2], $pair[1], $pair[2]
)
return if($match-level) then (
let $q := (xs:decimal(map:get($cli-accepts-map, 'q')), 1.0)[1]
return $q * $match-level
) else (
0
)
)
let $max-level := max($levels)
return $max-level
)
};
declare function rest:value-from-path(
$function as function(*),
$variable-name as xs:QName) as xs:string? {
map:get(
rest:path-variable-map($request-path,
xdmp:annotation($function, xs:QName('rest:path'))),
xs:string($variable-name)
)
};
declare function rest:path-variable-map(
$path as xs:string,
$annotation as xs:string) as map:map? {
try
{
let $annotation := "^" || $annotation || "$"
let $grouping-map as map:map := map:map()
let $analyzed := fn:analyze-string($annotation, "\{\$[^}]+\}")/element()
let $regex :=
string-join(
for $element in $analyzed
return
typeswitch($element)
case element(fn:match) return (
let $key := fn:replace($element,'\{\$([^=}]+).*', '$1')
let $group-index := count($element/preceding-sibling::fn:match) + 1
let $_ := map:put($grouping-map, xs:string($group-index), $key)
let $regex :=
if(fn:matches($element, '=')) then
fn:replace($element, '\{\$[^=}]+=([^}]+).*', '($1)')
else
'([^/]+)'
return $regex
)
default
return $element
)
let $path-match := fn:analyze-string($path, $regex)
return
if($path-match/fn:match) then (
map:new(
for $group-index-key in map:keys($grouping-map)
return
map:entry(
map:get($grouping-map, $group-index-key),
string($path-match//fn:group[@nr=xs:integer($group-index-key)])
)
)
) else ( )
} catch($e) {
fn:error(xs:QName('rerr:XQRS001'), "Invalid Path Expression.")
}
};
declare function rest:value-from-query-param(
$func as function(*),
$variable-name as xs:QName) as xs:string* {
rest:value-from-function(
$func, $variable-name, $query-param-annotations, rest:get-request-field#2
)
};
declare function rest:value-from-header-param(
$func as function(*),
$variable-name as xs:QName) as xs:string* {
rest:value-from-function(
$func, $variable-name, $header-param-annotations, rest:get-request-header#2
)
};
declare function rest:value-from-function(
$function as function(*),
$variable-name as xs:QName,
$param-annotations as xs:QName+,
$accessor as function(xs:string, item()*) as item()*) as xs:string* {
for $qname in $param-annotations
let $annotation := xdmp:annotation($function, $qname)
let $validate :=
rest:assert-annotation-cardinality($function, $qname, 2, ())
where rest:annotation-literal-matches($function, $qname, $variable-name)
return $accessor($annotation[1], $annotation[3 to last()] ! string(.))
};
declare function rest:value-from-cookie-param(
$function as function(*),
$variable-name as xs:QName) as xs:string* {
for $qname in $cookie-param-annotations
let $annotation := xdmp:annotation($function, $qname)
let $validate :=
rest:assert-annotation-cardinality($function, $qname, 2, ())
where rest:annotation-literal-matches($function, $qname, $variable-name)
return (
let $cookie-value :=
for $cookie-map in $cookies
let $cookie-key as xs:string :=
map:keys($cookie-map)[not(lower-case(.)=('$path','$version','$domain'))]
where $cookie-key = $annotation[1]
return map:get($cookie-map, $cookie-key)
return
(
if(exists($cookie-value)) then
$cookie-value
else
$annotation[3 to last()] ! string(.)
)
)
};
declare function rest:value-from-form-param(
$function as function(*),
$variable-name as xs:QName) {
for $qname in $form-param-annotations
let $annotation := xdmp:annotation($function, $qname)
let $validate :=
rest:assert-annotation-cardinality($function, $qname, 2, ())
let $mime := replace(lower-case($content-type-header), '^([^\s;]+).*', '$1')
where rest:annotation-literal-matches($function, $qname, $variable-name)
return (
let $e :=
rest:get-request-field(
$annotation[1],
$annotation[3 to last()] ! string(.)
)
return
if($mime = 'multipart/form-data') then (
let $map := map:map()
let $_ :=
for $binary-item at $i in $e
let $entry :=
map:entry("body", $binary-item) =>
map:with("content-type",
xdmp:get-request-field-content-type($annotation[1])[$i])
return map:put(
$map, xdmp:get-request-field-filename($annotation[1])[$i], $entry
)
return $map
)
else (
$e
)
)
};
declare function rest:http-header-value-params($value as xs:string) as map:map*
{
let $value := (: quoted strings have commas replaced for simplicity :)
fn:analyze-string($value, '"[^"]*"')/node() ! (
typeswitch(.)
case element(fn:match) return fn:replace(., ',', '，')
default return string(.)
) => string-join()
return
fn:tokenize($value, ",") !
map:new(
fn:tokenize(., ";\s*") !
(
if(fn:contains(., '=')) then (
let $tokens := fn:tokenize(., "=")
return map:entry(normalize-space($tokens[1]),
normalize-space(replace(
(: replace the commas in quoted strings back :)
replace($tokens[2],'，',',')
, '"','')))
)
else
map:entry("xqrs:title", normalize-space(.))
)
)
};
declare function rest:rdf-type($content-type as xs:string) as xs:string? {
map:get($rdf-mime-to-method, replace($content-type, '^([^\s]+)','$1'))
};
declare function rest:parse-multipart-body() as json:array {
let $decoded :=
xdmp:multipart-decode(
map:get(rest:http-header-value-params($content-type-header), "boundary"),
xdmp:get-request-body()/node()
)
let $part-maps as map:map* :=
$decoded[1]/part ! (
map:new(
headers/element() ! map:entry(lower-case(local-name(.)), string(.))
)
)
let $_ :=
for $map at $i in $part-maps
return (
let $decoded-correction := (
typeswitch($decoded[$i + 1]/node())
case $e as binary() | text()
return rest:parse-multipart-item($decoded[$i + 1],
map:get($map, "content-type"))
default
return $decoded[$i + 1]
)
return map:put($map, 'body', $decoded-correction)
)
return json:to-array($part-maps)
};
declare function rest:parse-multipart-item(
$input as document-node(), (: For when it just gets a little too spicey :)
$content-type as xs:string) {
if(rest:rdf-type($content-type)) then
sem:rdf-parse($input, rest:rdf-type($content-type))
else if(starts-with($content-type, 'text/')) then
xdmp:binary-decode($input/node(), "utf-8")
else
$input/node()
};
declare function rest:value-from-request-body(
$function as function(*),
$variable-name as xs:QName) {
let $post := xs:QName('rest:POST') let $put := xs:QName('rest:PUT')
let $post-ann := xdmp:annotation($function, $post)
let $put-ann := xdmp:annotation($function, $put)
let $regex := '\{\$' || $variable-name || '\}'
let $_ := (
rest:assert-annotation-cardinality($function, $put, 0, 1),
rest:assert-annotation-cardinality($function, $post, 0, 1),
rest:annotation-ats($function, $post-ann, $post, $variable-name),
rest:annotation-ats($function, $put-ann, $put, $variable-name)
)
return
if(not($post-ann instance of xs:boolean) and matches($post-ann, $regex) or
not($put-ann instance of xs:boolean) and matches($put-ann, $regex)) then
(
if(starts-with($content-type-header, 'multipart/')) then (
let $array := rest:parse-multipart-body()
return json:array-values($array) ! map:get(., 'body')
)
else if(rest:rdf-type($content-type-header)) then (
let $rdf-type := rest:rdf-type($content-type-header)
return
sem:rdf-parse(
xdmp:get-request-body(
if($rdf-type = ('triplexml', 'rdfxml')) then 'xml'
else if($rdf-type = 'rdfjson') then 'json'
else 'text'
), $rdf-type
)
)
else if(matches($content-type-header, '^(text|application)/.*\+?xml')) then
xdmp:get-request-body("xml")
else if(matches($content-type-header, '^(text|application)/.*\+?json')) then
xdmp:get-request-body("json")
else if(matches($content-type-header, '^text/')) then
xdmp:get-request-body("text")
else (
let $v := xdmp:get-request-body()
return if($v/node() instance of binary()) then $v/node()
else $v
)
) else ()
};
declare function rest:get-request-field(
$name as xs:string,
$default as item()*) as item()* {
let $preferred := xdmp:get-request-field($name)
return if($preferred) then $preferred else $default
};
declare function rest:get-request-header(
$name as xs:string,
$default as item()*) as item()* {
let $preferred := fn:tokenize(xdmp:get-request-header($name), "\s*,\s*")
return if($preferred) then $preferred else $default
};
declare function rest:apply($function as function(*), $map as map:map) {
let $XQRSSessionID as xs:string? := map:get($cookies, "XQRS-Session-ID")
let $tx-boundary :=
exists(xdmp:annotation($function, xs:QName('xdmp:tx-boundary')))
let $update :=
(xs:string(xdmp:annotation($function, xs:QName('xdmp:update'))), 'auto')[1]
let $commit := if($XQRSSessionID) then "explicit" else "auto"
let $v :=
function($i as xs:integer) {
map:get(
$map, xdmp:key-from-QName(xdmp:function-parameter-name($function, $i))
)
}
let $func := function() {
switch(fn:function-arity($function))
case 0 return xdmp:apply($function)
case 1 return xdmp:apply($function, $v(1))
case 2 return xdmp:apply($function, $v(1), $v(2))
case 3 return xdmp:apply($function, $v(1), $v(2), $v(3))
case 4 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4))
case 5 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5))
case 6 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5), $v(6))
case 7 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5), $v(6), $v(7))
case 8 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5), $v(6), $v(7), $v(8))
case 9 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5), $v(6), $v(7), $v(8), $v(9))
case 10 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5), $v(6), $v(7), $v(8), $v(9), $v(10))
case 11 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5), $v(6), $v(7), $v(8), $v(9), $v(10), $v(11))
case 12 return xdmp:apply($function, $v(1), $v(2), $v(3), $v(4), $v(5), $v(6), $v(7), $v(8), $v(9), $v(10), $v(11), $v(12))
default return
fn:error(xs:QName('rerr:XQRS009'), 'Unsupported number of arguments.')
}
let $response :=
if($tx-boundary) then $func()
else
xdmp:invoke-function(
$func,
<options xmlns="xdmp:eval">{
if($XQRSSessionID) then (
<transaction-id>{$XQRSSessionID}</transaction-id>
)
else (
<update>{$update}</update>,
<commit>{$commit}</commit>
)
}
</options>
)
return rest:serialize-sequence($function, $response)
};
declare function rest:annotation-literal-matches(
$function as function(*),
$annotation-qname as xs:QName,
$variable-name as xs:QName) as xs:boolean
{
let $ann := xdmp:annotation($function, $annotation-qname)
return if(fn:exists($ann)) then (
let $l1 := $ann[1] let $l2 := $ann[2]
let $validate :=
if(empty($l1[normalize-space()])) then
fn:error(xs:QName('rerr:XQRS010'),
'Annotation %' || $annotation-qname || ' for function ' ||
xdmp:function-name($function) || ' does not have a value for it''s ' ||
'first argument.')
else ()
return
string($variable-name) =
rest:annotation-ats($function, $l2, $annotation-qname,
$variable-name)
) else fn:false()
};
declare function rest:annotation-ats(
$function as function(*),
$ats as xs:string,
$annotation-qname as xs:QName,
$variable-name as xs:QName) as xs:string
{
let $analyze-result := fn:analyze-string($ats, '^\{\$([^\}]+)\}$')
let $literal-variable as xs:string :=
if(exists($analyze-result/fn:non-match) or
empty($analyze-result/fn:match/fn:group)) then
fn:error(xs:QName('rerr:XQRS008'), 'Invalid Annotation Template Syntax "'
|| $ats || '" in Annotation %' || $annotation-qname ||
' for function ' || xdmp:function-name($function))
else
$analyze-result/fn:match/fn:group/string()
return $literal-variable
};
declare function rest:assert-valid-output-method(
$annotation-method as xs:string,
$test as xs:string+,
$result-type as xs:string?) as empty-sequence() {
let $err := function($qname as xs:QName, $message as xs:string) {
fn:error($qname, $message)
}
return
if(fn:not(map:contains($output-method-default-mime-types,
$annotation-method)))
then (
let $did-you-mean as xs:string? :=
(for $key in map:keys($output-method-default-mime-types)
let $distance := spell:levenshtein-distance($annotation-method, $key)
where $distance lt 5 order by $distance return $key)[1]
return
$err(
xs:QName('rerr:XQRS012'),
'Output method "' || $annotation-method || '" is not supported.' ||
(if($did-you-mean) then ' Did you mean "' || $did-you-mean || '"?'
else ()))
)
else if(not($annotation-method = $test)) then (
$err(xs:QName('rerr:XQRS011'),
'Output method "' || $annotation-method ||
'" is incompatible with the result type' ||
(if($result-type) then ' "' || $result-type || '"' else ()))
) else ()
};
declare function rest:assert-valid-mediatype(
$function as function(*),
$annotation-qname as xs:QName) as empty-sequence() {
let $ann := xdmp:annotation($function, $annotation-qname)
let $_ :=
rest:assert-annotation-cardinality($function, $annotation-qname, 1, ())
return
for $x in $ann
return
if($x instance of xs:string and fn:matches($x,
'^(application|audio|image|message|model|multipart|' ||
'text|video|\*)/(\*|.{2,})$')) then ()
else
fn:error(xs:QName('rerr:XQRS013'),
'Invalid Media Type "' || string($x) || '" in annotation %' ||
$annotation-qname || ' for function ' || xdmp:function-name($function))
};
declare function rest:assert-annotation-cardinality(
$function as function(*),
$annotation-qname as xs:QName,
$min as xs:integer,
$max as xs:integer?) as empty-sequence() {
let $f := function($count as xs:integer) {
if(($max and $count gt $max) or $count lt $min) then
fn:error(xs:QName('rerr:XQRS007'),
'The annotation %' || $annotation-qname || ' in function ' ||
xdmp:function-name($function) ||
' must have a literal cardinality of ' || $min || ' ' ||
(if($max) then 'to ' || $max else 'or more') ||
', the current cardinality is '
|| $count || '.')
else ()
}
return
typeswitch(xdmp:annotation($function, $annotation-qname))
case xs:boolean return $f(0)
case $v as item()+ return $f(count($v))
default return ()
};
declare function rest:serialize-sequence($function as function(*), $response)
{
let $serialization-map as map:map :=
rest:serialization-parameter-map($function)
let $serialization-map-item-level as map:map :=
map:new(
map:keys($serialization-map)[. = $item-level-parameters] !
map:entry(., map:get($serialization-map, .))
)
let $annotation-method := map:get($serialization-map, 'method')
let $encoding :=
xdmp:set-response-encoding(
(map:get($serialization-map, 'encoding'), "UTF-8")[1]
)
let $first-item as item()? := fn:head($response)
return
(
let $sequence :=
if($first-item instance of document-node(element(rest:response)) or
$first-item instance of element(rest:response)) then (
rest:rest-response($first-item/descendant-or-self::rest:response),
fn:tail($response)
)
else $response
let $response-media-type :=
xdmp:set-response-content-type(
(
map:get($serialization-map, 'mediaType'),
map:get($output-method-default-mime-types, $annotation-method),
rest:default-response-mimetype($sequence)
)[1]
)
return
if($sequence instance of sem:triple+) then (
let $as := ($annotation-method, "turtle")[1]
return (
rest:assert-valid-output-method($as, $method-triples, "sem:triple+"),
sem:rdf-serialize($sequence, $as)
)
)
else if($sequence instance of map:map+ and
$annotation-method = $method-sparql-results) then (
rest:serialize-sparql-results($annotation-method, $sequence)
) else (
fn:fold-left(
function($prev, $item) {
$prev,
rest:serialize-item(
(if($prev instance of empty-sequence()) then $serialization-map
else $serialization-map-item-level), $item)
}, (), $sequence)
)
=>
rest:item-separator(
xdmp:annotation($function, xs:QName('output:item-separator')))
)
};
declare function rest:item-separator($seq, $item-separator as xs:string?) {
if(not(exists($item-separator))) then $seq
else string-join($seq ! xdmp:quote(.), $item-separator)
};
declare function rest:serialization-parameter-map(
$function as function(*)) as map:map {
map:new(
($sequence-level-parameters, $item-level-parameters)
! (
let $ann := xdmp:annotation($function, xs:QName('output:' || .))
return if(exists($ann)) then (
map:entry(rest:camel-case(.), $ann),
if(. = 'indent') then (
map:entry('indentUntyped', $ann)
) else ()
) else ()
)
)
};
declare function rest:camel-case($input as xs:string) as xs:string {
let $tokens := fn:tokenize(lower-case($input), '-')
return string-join((fn:head($tokens), fn:tail($tokens) ! xdmp:initcap(.)))
};
declare function rest:serialize-sparql-results(
$method as xs:string,
$v as map:map*) {
sem:query-results-serialize($v, substring-after($method, "sparql-results-"))
};
declare function rest:serialize-item($output as map:map, $item as item()) {
typeswitch($item)
case document-node(element()) | element() return
rest:serialize-xml($output, $item)
case xs:anyAtomicType return (
rest:assert-valid-output-method((map:get($output, 'method'), "text")[1],
"text", string(xdmp:type($item))),
if(map:contains($output, 'normalizationForm')) then
fn:normalize-unicode($item, map:get($output, 'normalizationForm'))
else
$item
)
default return $item
};
declare function rest:serialize-xml($output-map as map:map, $node as node()) {
rest:assert-valid-output-method(
(map:get($output-map, 'method'), 'xml')[1],
('xml', 'xhtml', 'html'),
xdmp:node-kind($node)
),
xdmp:quote($node, $output-map)
};
declare function rest:default-response-mimetype($i as item()*) as xs:string? {
typeswitch($i)
case document-node(element()) return "text/xml"
case element() return "text/xml"
case text() return "text/plain"
case $v as document-node() return
if(exists($v/object-node()) or exists($v/array-node())) then
"application/json" else "text/xml"
case binary() return "application/octet-stream"
case sem:triple+ return "text/turtle"
case xs:anyAtomicType+ return "text/plain"
default return ()
};
declare function rest:rest-response(
$response as element(rest:response)) as empty-sequence() {
rest:http-response($response/http:response)
};
declare function rest:http-response($http-response as element(http:response)) {
xdmp:set-response-code(
(xs:integer($http-response/@status[normalize-space()]), 200)[1],
($http-response/@message, "")[1]
),
$http-response/http:header ! rest:http-header(.)
};
declare function rest:http-header($header as element(http:header)) {
xdmp:add-response-header($header/@name, $header/@value)
};
declare function rest:build-parameter-map(
$function as function(*),
$value-extractors as (function(function(*), xs:QName) as item()*)+
) as empty-sequence()
{
for $index in 1 to fn:function-arity($function)
let $parameter-qname as xs:QName :=
xdmp:function-parameter-name($function, $index)
let $parameter-sequence-type as xs:string :=
xdmp:function-parameter-type($function, $index)
let $sequence-type := rest:parse-type($parameter-sequence-type)
let $parameter-cardinality := map:get($sequence-type, 'cardinality')
let $item-type as xs:string := map:get($sequence-type, 'item-type')
let $value :=
fn:fold-left(
function($prev, $item) {
if(fn:exists($prev)) then $prev
else (
let $v := $item($function, $parameter-qname)
let $_ :=
if(exists($v) and xdmp:function-name($item) =
xdmp:function-name(rest:value-from-path#2) and
$parameter-cardinality != $exactly-one) then (
fn:error(xs:QName('rerr:XQRS004'), 'As parameter $' ||
$parameter-qname ||
' comes from a path annotation, it must allow for "exactly one" ' ||
'atomic value in function ' || xdmp:function-name($function) ||
', presently it is "' || $parameter-sequence-type || '"')
) else ()
return $v
)
}, (), $value-extractors
)
let $castable := (
if($item-type = 'document-node()') then $value instance of document-node()*
else if($item-type = 'sem:triple') then $value instance of sem:triple*
else if($item-type = 'binary()') then $value instance of binary()*
else if($item-type = 'item()') then $value instance of item()*
else if($item-type = 'map:map') then $value instance of map:map*
else if($item-type = 'text()') then (
fn:error(xs:QName('rerr:XQRS005'),
'text() parameter types are not allowed, see parameter $' ||
$parameter-qname || ' in function ' || xdmp:function-name($function))
)
else (
let $ns := fn:namespace-uri-from-QName(xs:QName($item-type))
let $local := fn:local-name-from-QName(xs:QName($item-type))
return
every $item in $value satisfies xdmp:castable-as($ns, $local, $item)
)
)
let $marklogic-castable := (: MarkLogic Function Mapping coming to get us :)
fn:not($parameter-cardinality = $exactly-one and fn:empty($value))
let $void := if(not($marklogic-castable) or
not($castable) and
not($parameter-cardinality =
($zero-or-more, $zero-or-one))) then (
if(exists($value)) then
fn:error(
xs:QName('rerr:XQRS002'),
'"' || $value || '" not castable as ' || $parameter-sequence-type ||
" for parameter $" || $parameter-qname ||
" in function " || xdmp:function-name($function)
)
else
fn:error(
xs:QName('rerr:XQRS003'),
'Could not find a value for parameter $' || $parameter-qname ||
' in function ' || xdmp:function-name($function) ||
' from the RESTXQ Annotations.'
)
) else ( )
let $cast-function :=
function($individual-item) {
if($item-type =
("document-node()", "sem:triple","binary()","item()","map:map")) then (
$individual-item
)