CHTTP 的 MSDN 的方法是最好的 下载文件方法吗。

[xiaozi5230]

DWORD dwSize = 0;
DWORD dwDownloaded = 0;
LPSTR pszOutBuffer;
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"www.microsoft.com",
INTERNET_DEFAULT_HTTPS_PORT, 0);

// Create an HTTP request handle.
if (hConnect)
hRequest = WinHttpOpenRequest( hConnect, L"GET", NULL,
NULL, WINHTTP_NO_REFERER,
WINHTTP_DEFAULT_ACCEPT_TYPES,
WINHTTP_FLAG_SECURE);

// Send a request.
if (hRequest)
bResults = WinHttpSendRequest( hRequest,
WINHTTP_NO_ADDITIONAL_HEADERS,
0, WINHTTP_NO_REQUEST_DATA, 0,
0, 0);


// End the request.
if (bResults)
bResults = WinHttpReceiveResponse( hRequest, NULL);

// Continue to verify data until there is nothing left.
if (bResults)
do
{

// Verify 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\n", 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 open handles.
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);

这是MSDN原文。

如果这个方式是最好的下载方式那就请高手解释下 WinHttpOpen() WinHttpConnect() WinHttpOpenRequest() WinHttpSendRequest() WinHttpReceiveResponse() WinHttpQueryDataAvailable() WinHttpReadData() 这些函数百度也查不到什么意思。求解。分数可以到时候多给你。谢谢。能详细解答最好了。

[「已注销」]

为什么要上百度去查？这种微软的资料必须到 Bing 或者 Google。国内你懂得，只能用 Bing 了。 https://msdn.microsoft.com/en-us/library/aa384257.aspx

[qq_35479030]

到 Bing 或者 Google查去

[qq_35479030]

国内的都是假的查不到

[Jesse_Zhang370]

到 Bing 或者 Google查去

[邱嵩松]

同求 帮你顶一下

[二进制程序猿]

用google查，不信查不到

[oN5GrzoN]

引用 1 楼 SXJIAKE 的回复:

为什么要上百度去查？这种微软的资料必须到 Bing 或者 Google。国内你懂得，只能用 Bing 了。 https://msdn.microsoft.com/en-us/library/aa384257.aspx

虽然这些函数我也推荐直接看MSDN,但楼主的意思是找点国内使用的资料，如果用百度搜的话排名前几的，也有MSDN文档，所以不代表百度搜这个很差。