Welcome 微信登录
编程资源 图片资源库 蚂蚁家优选 PDF转换器

首页 / 操作系统 / Linux / curl最简单的下载功能的使用

下面是curl最简单的下载示例,其实再强大的功能库,helloworld程序也是很重要,让使用的人一眼就看出好用不好用~这里包含了#include<string>会导致编译错误,需要把share.h重命名一下,再编译#include "stdafx.h"
#include "curl/curl.h"
#include <string>#include "curl/easy.h"using namespace std;static size_t downLoadPackage(void *ptr, size_t size, size_t nmemb, void *userdata)
{
 FILE *fp = (FILE*)userdata;
 size_t written = fwrite(ptr, size, nmemb, fp);
 return written;
}int assetsManagerProgressFunc(void *ptr, double totalToDownload, double nowDownloaded, double totalToUpLoad, double nowUpLoaded)
{
 static int percent = 0;
 int tmp = 0;
 if ( totalToDownload > 0 )
 {
  tmp = (int)(nowDownloaded / totalToDownload * 100);
 }
 
 printf("下载进度%0d%% ", tmp);
 return 0;
}bool downLoad(void *_curl, std::string _packageUrl, std::string _storagePath, std::string fileName )
{
 // Create a file to save package.
 const string outFileName = _storagePath + fileName;
 FILE *fp = fopen(outFileName.c_str(), "wb");
 if (! fp)
 {
  return false;
 } // Download pacakge
 CURLcode res;
 curl_easy_setopt(_curl, CURLOPT_URL, _packageUrl.c_str());
 curl_easy_setopt(_curl, CURLOPT_WRITEFUNCTION, downLoadPackage);
 curl_easy_setopt(_curl, CURLOPT_WRITEDATA, fp);
 curl_easy_setopt(_curl, CURLOPT_NOPROGRESS, false);
 curl_easy_setopt(_curl, CURLOPT_PROGRESSFUNCTION, assetsManagerProgressFunc);
 //curl_easy_setopt(_curl, CURLOPT_PROGRESSDATA, this);
 curl_easy_setopt(_curl, CURLOPT_NOSIGNAL, 1L);
 curl_easy_setopt(_curl, CURLOPT_LOW_SPEED_LIMIT, 1L);
 curl_easy_setopt(_curl, CURLOPT_LOW_SPEED_TIME, 5L); res = curl_easy_perform(_curl);
 curl_easy_cleanup(_curl);
 if (res != 0)
 {
  fclose(fp);
  return false;
 } fclose(fp);
 return true;
}int _tmain(int argc, _TCHAR* argv[])
{
 CURL* _curl = curl_easy_init();
 if (! _curl)
 {
  return 0;
 } downLoad(_curl, "http://ardownload.adobe.com/pub/adobe/reader/win/11.x/11.0.01/en_US/AdbeRdr11001_en_US.exe", "./", "AdbeRdr11001_en_US.exe"); getchar();
 return 0;
}Ubuntu 用户安装下载器 cURL 7.36.0  http://www.linuxidc.com/Linux/2014-05/102269.htmLinux curl使用简单介绍 http://www.linuxidc.com/Linux/2008-01/10891.htmUnix下Curl的使用方法及常用功能记录分享 http://www.linuxidc.com/Linux/2012-08/69154.htmcurl命令使用 http://www.linuxidc.com/Linux/2014-09/107018.htm本文永久更新链接地址:http://www.linuxidc.com/Linux/2014-10/107510.htm