port = 80
try:
remote_ip = socket.gethostbyname( host )
except socket.gaierror:
#could not resolve
print 'Hostname could not be resolved. Exiting'
sys.exit()
print 'Ip address of ' + host + ' is ' + remote_ip
#Connect to remote server
s.connect((remote_ip , port))
print 'Socket Connected to ' + host + ' on ip ' + remote_ip
#Send some data to remote server
message = "GET / HTTP/1.1rnrn"
try :
#Set the whole string
s.sendall(message)
except socket.error:
#Send failed
print 'Send failed'
sys.exit()
print 'Message send successfully'
上述例子中，首先连接到目标服务器，然后发送字符串数据 "GET / HTTP/1.1rnrn" ，这是一个 HTTP 协议的命令，用来获取网站首页的内容。
接下来需要读取服务器返回的数据。
接收数据
recv 函数用于从 socket 接收数据：
#Socket client example in python
import socket #for sockets
import sys #for exit
#create an INET, STREAMing socket
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error:
print 'Failed to create socket'
sys.exit()
print 'Socket Created'
host = 'jb51.net';
port = 80;
try:
remote_ip = socket.gethostbyname( host )
except socket.gaierror:
#could not resolve
print 'Hostname could not be resolved. Exiting'
sys.exit()
#Connect to remote server
s.connect((remote_ip , port))
print 'Socket Connected to ' + host + ' on ip ' + remote_ip
#Send some data to remote server
message = "GET / HTTP/1.1rnHost: jb51.netrnrn"
try :
#Set the whole string
s.sendall(message)
except socket.error:
#Send failed
print 'Send failed'
sys.exit()
print 'Message send successfully'
#Now receive data
reply = s.recv(4096)
print reply
下面是上述程序执行的结果：
$ python client.py
Socket Created
Ip address of jb51.net is 61.145.122.
Socket Connected to jb51.net on ip 61.145.122.155
Message send successfully
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Wed, 24 Oct 2012 13:26:46 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Keep-Alive: timeout=20
Location: //www.jb51.net/
jb51.net 回应了我们所请求的 URL 的内容，很简单。数据接收完了，可以关闭 Socket 了。
