如何在CC++中使用WinHTTP下载文件？

概述我知道如何下载html / txt页面.例如 ： //Variables DWORD dwSize = 0;DWORD dwDownloaded = 0;LPSTR pszOutBuffer;vector <string> vFileContent;BOOL bResults = FALSE;HINTERNET hSession = NULL, hConn 我知道如何下载HTML / txt页面.例如 ：

//Variables DWORD DWSize = 0;DWORD DWDownloaded = 0;LPSTR pszOutBuffer;vector <string>  vfileContent;BOol  bResults = FALSE;HINTERNET  hSession = NulL,hConnect = NulL,hRequest = NulL;// Use WinhttpOpen to obtain a session handle.hSession = WinhttpOpen( L"Winhttp Example/1.0",WINhttp_ACCESS_TYPE_DEFAulT_PROXY,WINhttp_NO_PROXY_name,WINhttp_NO_PROXY_BYPASS,0);// Specify an http server.if (hSession)    hConnect = WinhttpConnect( hSession,L"nytimes.com",INTERNET_DEFAulT_http_PORT,0);// Create an http request handle.if (hConnect)    hRequest = WinhttpOpenRequest( hConnect,L"GET",L"/ref/multimedia/podcasts.HTML",NulL,WINhttp_NO_REFERER,NulL);// Send a request.if (hRequest)    bResults = WinhttpSendRequest( hRequest,WINhttp_NO_ADDITIONAL_headerS,WINhttp_NO_REQUEST_DATA,0);// End the request.if (bResults)    bResults = WinhttpReceiveResponse( hRequest,NulL);// Keep checking for data until there is nothing left.if (bResults)    do     {        // Check for available data.        DWSize = 0;        if (!WinhttpqueryDataAvailable( hRequest,&DWSize))            printf( "Error %u in WinhttpqueryDataAvailable.\n",GetLastError());        // Allocate space for the buffer.        pszOutBuffer = new char[DWSize+1];        if (!pszOutBuffer)        {            printf("Out of memory\n");            DWSize=0;        }        else        {            // Read the Data.            ZeroMemory(pszOutBuffer,DWSize+1);            if (!WinhttpReadData( hRequest,(LPVOID)pszOutBuffer,DWSize,&DWDownloaded))            {                printf( "Error %u in WinhttpReadData.\n",GetLastError());            }            else            {                        printf("%s",pszOutBuffer);                            // Data in vfileContent                vfileContent.push_back(pszOutBuffer);            }            // Free the memory allocated to the buffer.            delete [] pszOutBuffer;        }    } while (DWSize>0);// Report any errors.if (!bResults)    printf("Error %d has occurred.\n",GetLastError());// Close any open handles.if (hRequest) WinhttpCloseHandle(hRequest);if (hConnect) WinhttpCloseHandle(hConnect);if (hSession) WinhttpCloseHandle(hSession);// Write vfileContent to fileofstream out("test.txt",ios::binary);for (int i = 0; i < (int) vfileContent.size();i++)out << vfileContent[i];out.close();

当我尝试下载图片时,我只得到文件的第一行,没有错误信息.问题似乎与WinhttpOpenRequest函数中的此参数(ppwszAcceptTypes)有关.

link text

解决方法 看起来MSDN上的这个线程是一样的,并有解决方案

http://social.msdn.microsoft.com/forums/en-US/vclanguage/thread/45ccd91c-6794-4f9b-8f4f-865c76cc146d

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