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WinHttp支持HTTPS下载

#include “windows.h”

#include “winhttp.h”

#include “wchar.h”

#pragma comment(lib,”Winhttp.lib”)

// SSL (Secure Sockets Layer) example

// compile for console

void main()

{

HINTERNET hOpen = 0;

HINTERNET hConnect = 0;

HINTERNET hRequest = 0;

IStream *stream = NULL;

HRESULT hr;

while (1)

{

hOpen = WinHttpOpen(L”Aurora Console App”, WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,

WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);

if (!hOpen) {

wprintf(L”WinHttpOpen failed (0x%.8X)\n”, GetLastError());

break;

}

hConnect = WinHttpConnect(hOpen, L”raw.github.com”, INTERNET_DEFAULT_HTTPS_PORT, 0);

if (!hConnect) {

wprintf(L”WinHttpConnect failed (0x%.8X)\n”, GetLastError());

break;

}

LPCWSTR types[2];

types[0] = L”text/html”;

types[1] = 0;

// use flag WINHTTP_FLAG_SECURE to initiate SSL

hRequest = WinHttpOpenRequest(hConnect, L”GET”, L”zpfzzz/test/master/README.md”,

NULL, WINHTTP_NO_REFERER, &types[0], WINHTTP_FLAG_SECURE);

if (!hRequest)

{

wprintf(L”WinHttpOpenRequest failed (0x%.8X)\n”, GetLastError());

break;

}

if (!WinHttpSendRequest(hRequest, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, 0))

{

wprintf(L”WinHttpSendRequest failed (0x%.8X)\n”, GetLastError());

break;

}

if (!WinHttpReceiveResponse(hRequest, 0))

{

wprintf(L”WinHttpReceiveResponse failed (0x%.8X)\n”, GetLastError());

break;

}

// query remote file size, set haveContentLength on success and dwContentLength to the length

wchar_t szContentLength[32];

DWORD cch = 64;

DWORD dwHeaderIndex = WINHTTP_NO_HEADER_INDEX;

BOOL haveContentLength = WinHttpQueryHeaders(hRequest, WINHTTP_QUERY_CONTENT_LENGTH, NULL,

&szContentLength, &cch, &dwHeaderIndex);

DWORD dwContentLength;

if (haveContentLength) dwContentLength = _wtoi(szContentLength);

// read the response into memory stream

hr = CreateStreamOnHGlobal(0, true, &stream);

if (hr) {

wprintf(L”CreateStreamOnHGlobal failed (0x%.8X)\n”, hr);

break;

}

// allocate buffer for streaming received data

char *p = new char[4096];

if (!p)

{

wprintf(L”failed to allocate buffer\n”);

break;

}

// to receive all data, we need to enter a loop

DWORD dwReceivedTotal = 0;

while (WinHttpQueryDataAvailable(hRequest, &cch) && cch)

{

if (cch > 4096) cch = 4096;

dwReceivedTotal += cch;

// display number of received bytes

if (haveContentLength)

{

wprintf(L”received %d of %d (%d%%)%c”, dwReceivedTotal, dwContentLength,

dwReceivedTotal*100/dwContentLength, 13);

}

else {

wprintf(L”received %d (unknown length)%c”, dwReceivedTotal, 10);

}

WinHttpReadData(hRequest, p, cch, &cch);

// write into stream

hr = stream->Write(p, cch, NULL);

if (hr)

{

wprintf(L”failed to write data to stream (0x%.8X)\n”, hr);

}

}

delete [] p;

wprintf(L”\n\nreceived all data.\n”);

// terminate the sream with a NULL

p = NULL;

stream->Write(&p, 1, NULL);

// get pointer to stream bytes

wprintf(L”getting HGLOBAL from stream…\n”);

HGLOBAL hgl;

hr = GetHGlobalFromStream(stream, &hgl);

if (hr) {

wprintf(L”GetHGlobalFromStream failed (0x%.8X)\n”, hr);

break;

}

wprintf(L”locking memory…\n”);

p = (char*)GlobalLock(hgl);

if (!p)

{

wprintf(L”GlobalLock failed (0x%.8X)\n”, GetLastError());

break;

}

wprintf(L”displaying received data…\n”);

// terminate the string at 1024 bytes (MessageBox lag)

//if (dwReceivedTotal > 1024) dwReceivedTotal = 1024;

//*p[dwReceivedTotal] = 0;

MessageBoxA(0, p, “”, 0);

GlobalUnlock(hgl);

break;

}

// delete stream and close handles

if (stream) stream->Release();

if (hRequest) WinHttpCloseHandle(hRequest);

if (hConnect) WinHttpCloseHandle(hConnect);

if (hOpen) WinHttpCloseHandle(hOpen);

system(“pause”);

}