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【C】 WinInet远程下载文件的

作者:mickelfeng / 发布于2014/9/10/ 543


	#include<windows.h>
	#include<wininet.h>
	#include<iostream>
	#include <tchar.h>
	using namespace std;
	
	#pragma comment(lib,"wininet.lib")
	void main()
	{
	 DWORD byteread=0;
	 char buffer[100];
	 memset(buffer,0,100);
	 HINTERNET internetopen;
	
	 internetopen = InternetOpen(/*_T("DownLoadFile")*/NULL,INTERNET_OPEN_TYPE_DIRECT,NULL,NULL,0);
	 if (internetopen==NULL)
	 {
	 cout<<"Internet open failed!"<<endl;
	 return;
	 }
	
	 HINTERNET internetopenurl;
	 internetopenurl = InternetOpenUrl(internetopen,_T("http://topic.csdn.net/u/20090429/10/6a38f59f-b776-4140-a11b-f59c4a979931.html"),
	 NULL,0,INTERNET_FLAG_TRANSFER_BINARY|INTERNET_FLAG_PRAGMA_NOCACHE,0); //下载的URL
	 if (internetopenurl==NULL)
	 {
	 cout<<"Internet open url failed! error code = "<<GetLastError()<<endl;
	 goto there;
	 }
	
	 BOOL hwrite;
	 DWORD written;
	 HANDLE createfile;
	 createfile = CreateFile(_T("c://downloaded.html"),GENERIC_WRITE,0,0,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,0); //保存文件
	 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);
	}

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　WinInet　　远程下载　

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