Question

这是我的代码：

# Process connections

print('Listening on port', port)
while True:
    c, addr = s.accept()
    print("Got connection from", addr)
    msg = "<html></html>"

    response_headers = {
        'Content-Type': 'text/html; encoding=utf8',
        'Content-Length': len(msg.encode(encoding="utf-8")),
        'Connection': 'close',
    }

    response_headers_raw = ''.join('%s: %s\n' % (k, v) for k, v in response_headers.items())

    response_proto = 'HTTP/1.1'
    response_status = '200'
    response_status_text = 'OK' # this can be random

    # sending all this stuff
    r = '%s %s %s' % (response_proto, response_status, response_status_text)
    c.send(r.encode(encoding="utf-8"))
    c.send(response_headers_raw.encode(encoding="utf-8"))
    c.send('\n'.encode(encoding="utf-8")) # to separate headers from body
    c.send(msg.encode(encoding="utf-8"))

    c.close()

当我在浏览器上访问我的本地IP时，会出现一个错误页面

ERR_CONNECTION_RESET

我做错了什么？

注意：

完整的代码段在这里：

import socket

# Create socket object and set protocol
s = socket.socket(
    socket.AF_INET, socket.SOCK_STREAM)

# Get name of local machine
host = socket.gethostname()
port = 80

# Bind
s.bind((host, port))

# Listen and set backlog (?)
s.listen(5)

# Process connections
print('Listening on port', port)
while True:
    c, addr = s.accept()
    print("Got connection from", addr)
    msg = "<html></html>"

    response_headers = {
        'Content-Type': 'text/html; encoding=utf8',
        'Content-Length': len(msg.encode(encoding="utf-8")),
        'Connection': 'close',
    }

    response_headers_raw = ''.join('%s: %s\n' % (k, v) for k, v in response_headers.items())

    response_proto = 'HTTP/1.1'
    response_status = '200'
    response_status_text = 'OK' # this can be random

    # sending all this stuff
    r = '%s %s %s' % (response_proto, response_status, response_status_text)
    c.send(r.encode(encoding="utf-8"))
    c.send(response_headers_raw.encode(encoding="utf-8"))
    c.send('\n'.encode(encoding="utf-8")) # to separate headers from body
    c.send(msg.encode(encoding="utf-8"))

    c.close()

Answer 1

问题是HTTP标头需要由\r\n分隔，而不仅仅是\n。请参阅RFC 1945 - HTTP/1.0 Sec 2.2和RFC 7230 - HTTP/1.1 Syntax and Routing Sec 3。

如果你改变它，它将解决问题。

import socket

# Create socket object and set protocol
s = socket.socket(
    socket.AF_INET, socket.SOCK_STREAM)

# Get name of local machine
host = "127.0.0.1"
port = 8081

# Bind
s.bind((host, port))

# Listen and set backlog (?)
s.listen(5)

# Process connections
print('Listening on port', port)
while True:
    c, addr = s.accept()
    print("Got connection from", addr)
    msg = "<html><body><h1>This is a test</h1><p>More content here</p></body></html>"

    response_headers = {
        'Content-Type': 'text/html; encoding=utf8',
        'Content-Length': len(msg),
        'Connection': 'close',
    }

    response_headers_raw = ''.join('%s: %s\r\n' % (k, v) for k, v in response_headers.items())

    response_proto = 'HTTP/1.1'
    response_status = '200'
    response_status_text = 'OK' # this can be random

    # sending all this stuff
    r = '%s %s %s\r\n' % (response_proto, response_status, response_status_text)
    c.send(r)
    c.send(response_headers_raw)
    c.send('\r\n') # to separate headers from body
    c.send(msg.encode(encoding="utf-8"))

    c.close()

Answer 2

根据ERR_CONNECTION_RESET错误，您的tcp套接字可能无法成功收听该端口。

我在您的代码中将端口更改为8080，并在输出中写入Hello world，从而获得正确的HTML页面。

如果要成功侦听80端口，则必须使用root用户权限来运行python脚本：

`sudo python server.py＆＃39;

这是因为80端口是系统受限端口：Why are the first 1024 ports restricted to the root user only?。

Answer 3

我假设您将能够侦听端口80并接受连接，否则您的服务器应该提前抛出异常。

我的猜测是你重置连接，因为你的服务器没有读取客户端请求，而只是发送一些数据并关闭连接 - 来自客户端的请求仍然在套接字缓冲区中。这是一个典型的错误，已在Perl: Connection reset with simple HTTP server和HTTP Server Not Sending Complete File To WGET, Firefox. Connection reset by peer?以及"The connection was reset" on web browsers when trying to connect to a localhost socket server和Ultra simple HTTP socket server, written in PHP, behaving unexpectedly以及Simple http generic server using fork and dup处提出并回答。

尝试从低级套接字服务器发送HTTP响应

3 个答案: