如何判断HTTP请求结束

如果按下面这样写的话，在浏览器中访问12000端口，可能会显示出"Hellow World!"，但浏览器实际一直处于连接状态，在edge中状态栏会显示叉号，可以手动关闭连接。

from socket import socket, AF_INET, SOCK_STREAM, SOL_SOCKET, SO_REUSEADDR

HTTPResponse ='HTTP/1.1 200 OK\r\n\r\n<html>Hello World!</html>'

WebSocket = socket(AF_INET, SOCK_STREAM)
WebSocket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
WebSocket.bind(('localhost', 12000))
WebSocket.listen(1)

HTTPSocket, addr = WebSocket.accept()  # Wait Connection
while True:
  print('Waiting HTTP Request...')
  Request = HTTPSocket.recv(1024)
  
  print('Send HTTP Response!')
  HTTPSocket.sendall(HTTPResponse.encode('utf-8'))  # Send

可以使用的方法有：

Content-Length 指明了请求体的长度，可以直接读取指定长度的数据

from socket import socket, AF_INET, SOCK_STREAM, SOL_SOCKET, SO_REUSEADDR

HTTPResponse ='HTTP/1.1 200 OK\r\nContent-Length: 25\r\n\r\n<html>Hello World!</html>'

WebSocket = socket(AF_INET, SOCK_STREAM)
WebSocket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
WebSocket.bind(('localhost', 12000))
WebSocket.listen(1)

HTTPSocket, addr = WebSocket.accept()
while True:
  print('Waiting HTTP Request...')
  Request = HTTPSocket.recv(1024)
  
  print('Send HTTP Response!')
  HTTPSocket.send(HTTPResponse.encode('utf-8'))

Transfer-Encoding: chunked 数据要求为分块传输，格式为n\r\n数据\r\n，n为数据长度，n为0表示结束

from socket import socket, AF_INET, SOCK_STREAM, SOL_SOCKET, SO_REUSEADDR

HTTPResponse = 'HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n'

WebSocket = socket(AF_INET, SOCK_STREAM)
WebSocket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
WebSocket.bind(('localhost', 12000))
WebSocket.listen(1)

HTTPSocket, addr = WebSocket.accept()
while True:
  print('Waiting HTTP Request...')
  Request = HTTPSocket.recv(1024)
  
  print('Send HTTP Response!')
  HTTPSocket.send(HTTPResponse.encode('utf-8'))
  
  HTTPSocket.send('5\r\nHello\r\n'.encode('utf-8'))
  HTTPSocket.send('0\r\n\r\n'.encode('utf-8'))

Connection: close 请求结束后关闭连接

from socket import socket, AF_INET, SOCK_STREAM, SOL_SOCKET, SO_REUSEADDR

HTTPResponse ='HTTP/1.1 200 OK\r\n\r\n<html>Hello World!</html>'

WebSocket = socket(AF_INET, SOCK_STREAM)
WebSocket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
WebSocket.bind(('localhost', 12000))
WebSocket.listen(1)

while True:
  print('Waiting HTTP Request...')
  HTTPSocket, addr = WebSocket.accept()
  Request = HTTPSocket.recv(1024)
  
  print('Send HTTP Response!')
  HTTPSocket.send(HTTPResponse.encode('utf-8'))
  
  HTTPSocket.close()