C++ socket发送POST请求

// httpPost.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "stdio.h"#include <time.h>#include <WinSock2.h>#include <cstringt.h>#pragma comment(lib, "Ws2_32.lib")char* SendHttpRequest(char* weburl, char* url , char* detectorId ,char* JsonData);int main(int argc, char* argv[]){    char* JsonData = "[{\"a\":\"b\"}]";    char weburl[] = "www.test.com:8081";    char* url = "/post";    char* Id = "aaa";    char* re = SendHttpRequest(weburl,url, Id, JsonData);    printf("%s\r\n",re);    system("pause");    return 0;}char* SendHttpRequest(char* weburl, char* url , char* detectorId ,char* JsonData){    time_t rawtime;    struct tm * timeinfo;    time_t t = time ( &rawtime );    long timestamp = t;    char *pHttpPost = "POST %s/%s/%ld HTTP/1.1\r\n"                    "Content-Type: application/json\r\n"                    "Content-Length: %d\r\n"                    "Host:%s\r\n"                    "Connection: Keep-Alive\r\n"                    "User-Agent: Apache-HttpClient/4.5.3 (Java/1.7.0_75)\r\n"                    "Expect: 100-continue\r\n"                    "Accept-Encoding: gzip,deflate\r\n"                    "\r\n%s";    char strHttpPost[10240] = {0};      sprintf(strHttpPost, pHttpPost,url,detectorId, timestamp,strlen(JsonData),weburl,JsonData);      char* p = ":";    char* web = strtok(weburl,p);    int port = 80;    char* ptr;    if((ptr = strtok(NULL,p)))    {        port = atoi(ptr);    }    WORD wVersionRequested;      WSADATA wsaData;    int err;    wVersionRequested = MAKEWORD( 1, 1 );      err = WSAStartup(   wVersionRequested,   &wsaData   );      if( err != 0)   {          return false;      }      if( LOBYTE(wsaData.wVersion) != 1   ||  HIBYTE(   wsaData.wVersion   )   !=   1   )   {          WSACleanup(   );          return false;        }      SOCKET sockClient = socket(AF_INET,SOCK_STREAM,0);    HOSTENT* thisHost;    char* sIp = NULL;    thisHost = gethostbyname(web);    sIp = inet_ntoa(*(struct in_addr*)*thisHost->h_addr_list);    SOCKADDR_IN addrSrv;    addrSrv.sin_addr.S_un.S_addr = inet_addr(sIp);//本机地址，服务器在本机开启    addrSrv.sin_family=AF_INET;    addrSrv.sin_port=htons(port);// 设置端口号    char* content = NULL;    int a = connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));//连接服务器    if(a == 0)    {        send(sockClient, strHttpPost, strlen(strHttpPost), 0);        char recvBuf[1024];        while(true)        {            int r = recv(sockClient,recvBuf,1024,0);//接受数据            if(r > 0)            {                char* p = strstr(recvBuf,"HTTP/1.1 200");                if(p != NULL)                {                    char* ptr = strstr(recvBuf,"\r\n\r\n");                    if(ptr != NULL)                    {                        char* p_start = strtok(ptr,"{");                        if(p_start != NULL)                        {                            char* p = strtok(NULL,"{");                            if(p != NULL)                                content = strtok(p,"}");                        }                    }                    closesocket(sockClient);//关闭连接                    return content;                }                p = strstr(recvBuf,"HTTP/1.1 400");                if(p != NULL)                {                    break;                }            }        }        closesocket(sockClient);//关闭连接    }    return content; }