c里面使用libcurl库实现发送post并获取post到的内容

以下是c代码的实现:

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <curl/curl.h>#define POSTURL    "http://www.xiami.com/member/login"#define POSTFIELDS "email=[e-mail]&password=mypassword&autologin=1&submit=登 录&type="#define FILENAME   "curlposttest.log"size_t write_data(void* buffer,size_t size,size_t nmemb,void *stream){FILE *fptr = (FILE*)stream;fwrite(buffer,size,nmemb,fptr);return size*nmemb;}int main(int argc,char *argv[]){CURL *curl;CURLcode res;FILE* fptr;struct curl_slist *http_header = NULL;if ((fptr = fopen(FILENAME,"w")) == NULL){fprintf(stderr,"fopen file error:%s\n",FILENAME);return -1;}curl = curl_easy_init();if (!curl){fprintf(stderr,"curl init failed\n");return -1;}curl_easy_setopt(curl,CURLOPT_URL,POSTURL); //url地址curl_easy_setopt(curl,CURLOPT_POSTFIELDS,POSTFIELDS); //post参数curl_easy_setopt(curl,CURLOPT_WRITEFUNCTION,write_data); //对返回的数据进行操作的函数地址curl_easy_setopt(curl,CURLOPT_WRITEDATA,fptr); //这是write_data的第四个参数值curl_easy_setopt(curl,CURLOPT_POST,1); //设置问非0表示本次操作为postcurl_easy_setopt(curl,CURLOPT_VERBOSE,1); //打印调试信息curl_easy_setopt(curl,CURLOPT_HEADER,1); //将响应头信息和相应体一起传给write_datacurl_easy_setopt(curl,CURLOPT_FOLLOWLOCATION,1); //设置为非0,响应头信息locationcurl_easy_setopt(curl,CURLOPT_COOKIEFILE,"/Users/zhu/CProjects/curlposttest.cookie");res = curl_easy_perform(curl);if (res != CURLE_OK){switch(res){case CURLE_UNSUPPORTED_PROTOCOL:fprintf(stderr,"不支持的协议,由URL的头部指定\n");case CURLE_COULDNT_CONNECT:fprintf(stderr,"不能连接到remote主机或者代理\n");case CURLE_HTTP_RETURNED_ERROR:fprintf(stderr,"http返回错误\n");case CURLE_READ_ERROR:fprintf(stderr,"读本地文件错误\n");default:fprintf(stderr,"返回值:%d\n",res);}return -1;}curl_easy_cleanup(curl);}