httpServer

http协议是TCP协议的典型应用，是浏览器与服务器交流的主要方式，服务器会监听80端口，等待客户端连接

本blog在创建socket客户端和服务端的基础上，采用python socket和多线程构造一个简易的tinyHTTP,可以通过多线程并发支持多客户端请求，同时对客户端进行响应

# 由socket服务端改造为httpServer，
import socket
import threading
import os

#处理http客户端请求
def handle_http_client(c, addr):
  print(addr, "connected.")
  WEBROOT = os.path.dirname(__file__)
  print("WEBROOT",WEBROOT)
  with c:
    request = c.recv(1024)

    # Parse HTTP headers
    headers = request.split(b"\r\n")
    print(headers)
    file = headers[0].split()[1].decode()
    print("file",file)
    # Load file content
    if file == "/":
      file = "index.html"
    
    try:
      with open(WEBROOT + file, "rb") as f:
        content = f.read()
      response = b"HTTP/1.0 200 OK\r\n\r\n" + content
    except FileNotFoundError:
      response = b"HTTP/1.0 404 NOT FOUND\r\n\r\nFile not found!"
    # Send HTTP response
    c.sendall(response)

#处理socket客户端请求
def handle_client(c,addr):
  print(addr,"connected.")
  while True:
    data = c.recv(1024)
    if not data:
      break
    c.sendall(data)

with socket.socket(socket.AF_INET,socket.SOCK_STREAM) as s:
  s.bind(("0.0.0.0",1234))
  s.listen()
  
  while True:
    c, addr = s.accept()
    t = threading.Thread(target=handle_http_client, args=(c,addr))
    t.start()

# socket客户端 这里未实现http客户端(直接用浏览器代替)
import socket

with socket.socket(socket.AF_INET,socket.SOCK_STREAM) as s:
  s.connect(("127.0.0.1",1234))
  s.sendall(b"Hello,Xiaoming!")
  data = s.recv(1024)
  print("Received:",repr(data))