使用libcurl下载https地址的文件

 void downLoadFile(std::string filename, std::string newFilename)

 {

     CURL *curl_handle;

     static const char *pagefilename = (char *)newFilename.data();

     FILE *pagefile;

     char *p = (char *)filename.data();

     curl_global_init(CURL_GLOBAL_ALL);

     /* init the curl session */

     curl_handle = curl_easy_init();

     /* set URL to get here */

     curl_easy_setopt(curl_handle, CURLOPT_URL, p);

     /* Switch on full protocol/debug output while testing */

     curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L);

     /* disable progress meter, set to 0L to enable and disable debug output */

     curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);

     /* google.com is redirected, so we tell LibCurl to follow redirection */

     curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1L);

     /* SSL Options */

     curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, );

     curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYHOST, );

     /* Provide CA Certs from http://curl.haxx.se/docs/caextract.html */

     curl_easy_setopt(curl_handle, CURLOPT_CAINFO, "ca-bundle.crt");

     /* send all data to this function  */

     curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_data);

     /* open the file */

     pagefile = fopen(pagefilename, "wb");

     if (pagefile) {

         /* write the page body to this file handle */

         curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, pagefile);

         /* get it! */

         curl_easy_perform(curl_handle);

         /* close the header file */

         fclose(pagefile);

     }

     /* cleanup curl stuff */

     curl_easy_cleanup(curl_handle);

     return ;

 }

 static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)

 {

     size_t written = fwrite(ptr, size, nmemb, (FILE *)stream);

     return written;

 }

下载https地址的qq.exe程序

如果有朋友不想编译，我也把我编好的库和lib头文件打包，https://files.cnblogs.com/files/nightnine/libcurl.zip

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使用libcurl下载https地址的文件

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