python网络学习(02)

我们写出一个HTTP服务器端

#coding;utf-8
import socket

# Address
HOST = ''
PORT = 8000

# Prepare HTTP response
text_content = '''HTTP/1.x 200 OK
Content-Type: text/html

<head>
<title>WOW</title>
</head>
<html>
<p>Wow, Python Server</p>
<IMG src="test.jpg"/>
</html>
'''

# Read picture, put into HTTP format
f = open('test.jpg','rb')
pic_content = '''
HTTP/1.x 200 OK
Content-Type: image/jpg

'''
pic_content = pic_content + f.read()
f.close()

# Configure socket
s    = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))

# infinite loop, server forever
while True:
    # 3: maximum number of requests waiting
    s.listen(3)
    conn, addr = s.accept()
    request    = conn.recv(1024)
    method    = request.split(' ')[0]
    src            = request.split(' ')[1]

    # deal with GET method
    if method == 'GET':
        # ULR
        if src == '/test.jpg':
            content = pic_content
        else: content = text_content

        print 'Connected by', addr
        print 'Request is:', request
        conn.sendall(content)
    # close connection

  

如我们上面所看到的,服务器会根据request向客户传输的两条信息text_content和pic_content中的一条,作为response文本。整个response分为起始行(start line), 头信息(head)和主体(body)三部分。起始行就是第一行:

它实际上又由空格分为三个片段,HTTP/1.x表示所使用的HTTP版本,200表示状态(status code),200是HTTP协议规定的,表示服务器正常接收并处理请求,OK是供人来阅读的status code。

posted @ 2016-03-17 10:50  gopher-lin  阅读(225)  评论(0编辑  收藏  举报