原文地址：http://www.cnblogs.com/lidabo/p/6404533.html
纯C++实现的HTTP请求（POST/GET），支持windows和linux， 进行简单的封装， 方便调用。实现如下：
#include "HttpConnect.h" #ifdef WIN32 #pragma comment(lib,"ws2_32.lib") #endif HttpConnect::HttpConnect() { #ifdef WIN32 //此处一定要初始化一下，否则gethostbyname返回一直为空 WSADATA wsa = { 0 }; WSAStartup(MAKEWORD(2, 2), &wsa); #endif } HttpConnect::~HttpConnect() { } void HttpConnect::socketHttp(std::string host, std::string request) { int sockfd; struct sockaddr_in address; struct hostent *server; sockfd = socket(AF_INET,SOCK_STREAM,0); address.sin_family = AF_INET; address.sin_port = htons(80); server = gethostbyname(host.c_str()); memcpy((char *)&address.sin_addr.s_addr,(char*)server->h_addr, server->h_length); if(-1 == connect(sockfd,(struct sockaddr *)&address,sizeof(address))){ DBG <<"connection error!"<<std::endl; return; } DBG << request << std::endl; #ifdef WIN32 send(sockfd, request.c_str(),request.size(),0); #else write(sockfd,request.c_str(),request.size()); #endif char buf[1024*1024] = {0}; int offset = 0; int rc; #ifdef WIN32 while(rc = recv(sockfd, buf+offset, 1024,0)) #else while(rc = read(sockfd, buf+offset, 1024)) #endif { offset += rc; } #ifdef WIN32 closesocket(sockfd); #else close(sockfd); #endif buf[offset] = 0; DBG << buf << std::endl; } void HttpConnect::postData(std::string host, std::string path, std::string post_content) { //POST请求方式 std::stringstream stream; stream << "POST " << path; stream << " HTTP/1.0\r\n"; stream << "Host: "<< host << "\r\n"; stream << "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3\r\n"; stream << "Content-Type:application/x-www-form-urlencoded\r\n"; stream << "Content-Length:" << post_content.length()<<"\r\n"; stream << "Connection:close\r\n\r\n"; stream << post_content.c_str(); socketHttp(host, stream.str()); } void HttpConnect::getData(std::string host, std::string path, std::string get_content) { //GET请求方式 std::stringstream stream; stream << "GET " << path << "?" << get_content; stream << " HTTP/1.0\r\n"; stream << "Host: " << host << "\r\n"; stream <<"User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3\r\n"; stream <<"Connection:close\r\n\r\n"; socketHttp(host, stream.str()); }
调用方法：
HttpConnect *http = new HttpConnect(); http->getData("127.0.0.1", "/login", "id=liukang&pw=123"); http->postData("127.0.0.1", "/login","id=liukang&pw=123");
