用InternetOpen下载小文件 vc c++

来源：互联网发布：cadcam编程视频教程编辑：程序博客网时间：2024/04/29 14:39

文章改自：

http://hi.baidu.com/hacknothack/blog/item/4ca77710bc8e97fdc3ce79ad.html

使用vc6.0通过

#include "stdafx.h"#include<windows.h>#include<wininet.h>#include<iostream.h>#pragma comment(lib,"wininet.lib")void main(){DWORD byteread=0;char buffer[100];memset(buffer,0,100);HINTERNET internetopen;internetopen=InternetOpen("Testing",INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,0);if (internetopen==NULL){ cout<<"Internet open failed!"<<endl;return;}HINTERNET internetopenurl;internetopenurl=InternetOpenUrl(internetopen,"http://dt.163.com/images/news/0605/news02053101_5.jpg",NULL,0,INTERNET_FLAG_RELOAD,0); if (internetopenurl==NULL){ cout<<"Internet open url failed!"<<endl; goto there;}BOOL hwrite;DWORD written;HANDLE createfile;createfile=CreateFile("c://sss.jpg",GENERIC_WRITE,0,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0);if (createfile==INVALID_HANDLE_VALUE){ cout<<"Create File failed!"<<endl;goto next;}BOOL internetreadfile;while(1){internetreadfile=InternetReadFile(internetopenurl,buffer,sizeof(buffer),&byteread);if(byteread==0) break;hwrite=WriteFile(createfile,buffer,sizeof(buffer),&written,NULL);if (hwrite==0){cout<<"Write to file failed!"<<endl;goto here;}}cout<<"Finished downloading!"<<endl;here:CloseHandle(createfile);next: InternetCloseHandle(internetopenurl);there:InternetCloseHandle(internetopen);}