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【Python】 wininet封装模块
作者:lniwn / 发布于2013/8/20/ 1060

	#coding:utf-8
	import ctypes
	from urlparse import urlparse
	import threading

	INTERNET_OPEN_TYPE_PRECONFIG = 0
	INTERNET_OPEN_TYPE_PROXY = 3
	INTERNET_OPEN_TYPE_DIRECT = 1
	INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY = 4

	INTERNET_SERVICE_HTTP = 3
	INTERNET_FLAG_RELOAD = 2147483648
	HTTP_ADDREQ_FLAG_REPLACE = 2147483648
	HTTP_ADDREQ_FLAG_ADD= 536870912
	INTERNET_OPEN_TYPE_DIRECT = 1
	INTERNET_FLAG_SECURE = 8388608
	HTTP_QUERY_STATUS_CODE = 19

	wininet = ctypes.windll.LoadLibrary('wininet.dll')

	class wininetHttp():

	 def httpRequest(self,url,method="GET",proxy="",username="",password="",headers="",data="",timeout=20):
	 """
	 发出一个HTTP请求
	 参数：
	 url: 完整网址
	 method: 请求方法，可以是GET或POST
	 proxy: 代理地址
	 username: 用户名
	 password: 密码
	 headers: 协议头
	 data: 提交数据
	 timeout: 请求超时值
	 返回值：
	 元组(header,html)
	 """
	 requestThread = _httprequest(url,method,proxy,username,password,headers,data)
	 requestThread.daemon = True #线程随主线程一起退出
	 requestThread.start()
	 requestThread.join(timeout)
	 ret = requestThread.getResponse()
	 return ret


	class _httprequest(threading.Thread):
	
	 response = (0,'')
	
	 def __init__(self,url,method,proxy,username,password,headers,data):
	 threading.Thread.__init__(self)
	 self.url = url
	 self.url_info = urlparse(url)
	 self.method = method
	 self.proxy = proxy
	 self.username = username
	 self.password = password
	 self.headers = headers
	 self.data = data
	
	 def run(self):
	 dwAccessType = self.proxy and INTERNET_OPEN_TYPE_PROXY or INTERNET_OPEN_TYPE_DIRECT
	 lpszProxyName = self.proxy and 'http=' + self.proxy or None
	 lpszAgent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.72 Safari/537.36'
	 hOpen = wininet.InternetOpenA(lpszAgent,dwAccessType,lpszProxyName,None,0)
	 if not hOpen:
	 return
	 nServerPort = (self.url_info.scheme == 'https') and 443 or 80
	 hConn = wininet.InternetConnectA(hOpen,self.url_info.netloc.lower(),nServerPort,self.username,self.password,INTERNET_SERVICE_HTTP,0,0)
	 if not hConn:
	 wininet.InternetCloseHandle(hOpen)
	 return
	 dwFlags = (self.url_info.scheme == 'https') and INTERNET_FLAG_SECURE or INTERNET_FLAG_RELOAD
	 hRequest = wininet.HttpOpenRequestA(hConn,self.method,self.url_info.path,'HTTP/1.1',None,0,dwFlags,0)
	 if not hRequest:
	 wininet.InternetCloseHandle(hConn)
	 wininet.InternetCloseHandle(hOpen)
	 return
	 if not 'Accept: ' in self.headers:
	 self.headers += 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n'
	 if not 'Referer: ' in self.headers:
	 self.headers += 'Referer: %s\r\n' % self.url
	 if not 'Accept-Language: ' in self.headers:
	 self.headers += 'Accept-Language: zh-CN,zh;q=0.8\r\n'
	 if self.method.upper() == 'GET':
	 wininet.HttpSendRequestA(hRequest, self.headers,len(self.headers),None, 0)
	 elif self.method.upper() == 'POST':
	 if self.data != '':
	 if not 'Content-Type: ' in self.headers:
	 self.headers = self.headers + "Content-Type: application/x-www-form-urlencoded\r\n"
	 self.headers = self.headers + "Content-Length: %s\r\n" % len(self.data)
	 wininet.HttpSendRequestA(hRequest, self.headers,len(self.headers),self.data,len(self.data))
	 else:
	 wininet.InternetCloseHandle(hRequest)
	 wininet.InternetCloseHandle(hConn)
	 wininet.InternetCloseHandle(hOpen)
	 return
	 data_buf = (ctypes.c_char * 2048)()
	 ret_data = ''
	 x = ctypes.c_int(1)
	 while x.value != 0:
	 wininet.InternetReadFile(hRequest,data_buf,2048,ctypes.byref(x))
	 buf = (ctypes.c_char * x.value)()
	 ctypes.memmove(buf,data_buf,x.value)
	 ret_data += buf[:x.value]
	
	 head_buf = ctypes.create_string_buffer(2048)
	 buf_size = ctypes.c_int(2048)
	 wininet.HttpQueryInfoA(hRequest,22,head_buf,ctypes.byref(buf_size),0)
	
	 wininet.InternetCloseHandle(hRequest)
	 wininet.InternetCloseHandle(hConn)
	 wininet.InternetCloseHandle(hOpen)
	
	 self.response = (head_buf.value,ret_data)
	 return
	
	 def getResponse(self):
	 return self.response
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