ConnectionResetError: [Errno 54] Connection reset by peer

[zhang14725804]

my code as follows:

import sys
import ssl
import tkinter

def request(url):
    # 获取协议和url
    scheme,url = url.split("://",1)
    # 断言协议
    assert scheme in ["http","https"],"Unknown scheme {}".format(scheme)
    # 根据协议设置port
    port = 80 if scheme =="http" else 443
    # 获取host和path
    host,path = url.split("/",1)
    
    path = "/"+path
    s = socket.socket(
        family=socket.AF_INET,
        type=socket.SOCK_STREAM,
        proto=socket.IPPROTO_TCP,
    )
    # https协议特殊处理
    if scheme == "https":
        ctx = ssl.create_default_context()
        s = ctx.wrap_socket(s,server_hostname=host)
    
    # 自定义端口 http://example.org:8080/：
    if ":" in host:
        host,port = host.split(":",1)
        port=int(port)

    print(host,path,port)
    s.connect((host,port))

    s.send(b"GET /index.html HTTP/1.0\r\n"+b"Host: example.org\r\n\r\n")

    response = s.makefile("r",encoding="utf8",newline="\r\n")

    statusline = response.readline()
    version,status,explanation=statusline.split(" ",2)
    assert status == "200","{}:{}".format(status,explanation)

    headers = {}
    while True:
        line = response.readline()
        if line =="\r\n":break
        header,value = line.split(":",1)
        headers[header.lower()]=value.strip()

    body = response.read()
    s.close()
    return headers,body

def lex(body):
    text=""
    in_angle = False
    for c in body:
        if c=="<":
            in_angle=True
        elif c==">":
            in_angle=False
        elif not in_angle:
            text+=c
    return text

HSTEP,VSTEP=13,18
WIDTH, HEIGHT = 800, 600
SCROLL_STEP = 100

class Browser:
    def __init__(self):
        self.window=tkinter.Tk()
        self.canvas = tkinter.Canvas(
            self.window,
            width=WIDTH,
            height=HEIGHT
        )
        self.canvas.pack()
        self.scroll=0
        self.window.bind("<Down>",self.scrolldown)

    def load(self,url):
        headers,body=request(url)
        text = lex(body)
        self.display_list=layout(text)
        self.draw()
    def draw(self):
        self.canvas.delete("all")
        for x,y,c in self.display_list:
            if y>self.scroll+HEIGHT:continue
            if y+VSTEP<self.scroll:continue
            self.canvas.create_text(x, y-self.scroll, text=c)
    def scrolldown(self,e):
        self.scroll+=SCROLL_STEP
        self.draw()
        print("click down")

def layout(text):
    display_list = []
    cursor_x,cursor_y=HSTEP,VSTEP
    for c in text:
        display_list.append((cursor_x, cursor_y, c))
        cursor_x+=HSTEP
        if cursor_x>=WIDTH-HSTEP:
            cursor_y+=VSTEP
            cursor_x=HSTEP
    return display_list

if __name__=="__main__":
    Browser().load(sys.argv[1])
    tkinter.mainloop()

run my code:

python app.py https://www.zggdwx.com/xiyou/1.html

errors:

Traceback (most recent call last):
  File "app.py", line 110, in <module>
    Browser().load(sys.argv[1])
  File "app.py", line 83, in load
    headers,body=request(url)
  File "app.py", line 33, in request
    s.connect((host,port))
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ssl.py", line 1342, in connect
    self._real_connect(addr, False)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ssl.py", line 1333, in _real_connect
    self.do_handshake()
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/ssl.py", line 1309, in do_handshake
    self._sslobj.do_handshake()
ConnectionResetError: [Errno 54] Connection reset by peer

python version:Python 3.8.5

[shuhei]

Not sure if this is the cause, but the following line is always sending example.org, where it should send host

s.send(b"GET /index.html HTTP/1.0\r\n"+b"Host: example.org\r\n\r\n")

[zhang14725804]

Not sure if this is the cause, but the following line is always sending example.org, where it should send host

s.send(b"GET /index.html HTTP/1.0\r\n"+b"Host: example.org\r\n\r\n")

Thank you very much!
It's because of the agent!

[pavpanchekha]

Glad to hear. I'll add it to the list of things to fix about Chapter 1—though that's not going to be for a long time. (Heads down on Part 4 right now!)

[zhang14725804]

Thank you for your patient guidance