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I want to send HTTPS GET request using WinInet. As far as i know, i should do it just like sending HTTP request except i have to use INTERNET_DEFAULT_HTTPS_PORT and INTERNET_FLAG_SECURE flag.
So here is what i tried:
#include "stdafx.h"
#include <string>
#include <windows.h>
#include <WinInet.h>
#pragma comment (lib, "Wininet.lib")
using namespace std;
// convert string
wstring CharPToWstring(const char* _charP)
{
return wstring(_charP, _charP + strlen(_charP));
}
// send https request
wstring SendHTTPSRequest_GET(const wstring& _server,
const wstring& _page,
const wstring& _params = L"")
{
char szData[1024];
// initialize WinInet
HINTERNET hInternet = ::InternetOpen(TEXT("WinInet Test"), INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
if (hInternet != NULL)
{
// open HTTP session
HINTERNET hConnect = ::InternetConnect(hInternet, _server.c_str(), INTERNET_DEFAULT_HTTPS_PORT, NULL,NULL, INTERNET_SERVICE_HTTP, INTERNET_FLAG_SECURE, 1);
if (hConnect != NULL)
{
wstring request = _page +
(_params.empty() ? L"" : (L"?" + _params));
// open request
HINTERNET hRequest = ::HttpOpenRequest(hConnect, L"GET", (LPCWSTR)request.c_str() ,NULL, NULL, 0, INTERNET_FLAG_KEEP_CONNECTION, 1);
if (hRequest != NULL)
{
// send request
BOOL isSend = ::HttpSendRequest(hRequest, NULL, 0, NULL, 0);
if (isSend)
{
for(;;)
{
// reading data
DWORD dwByteRead;
BOOL isRead = ::InternetReadFile(hRequest, szData, sizeof(szData) - 1, &dwByteRead);
// break cycle if error or end
if (isRead == FALSE || dwByteRead == 0)
break;
// saving result
szData[dwByteRead] = 0;
}
}
// close request
::InternetCloseHandle(hRequest);
}
// close session
::InternetCloseHandle(hConnect);
}
// close WinInet
::InternetCloseHandle(hInternet);
}
wstring answer = CharPToWstring(szData);
return answer;
}
int _tmain(int argc, _TCHAR* argv[])
{
wstring answer = SendHTTPSRequest_GET(L"www.site.com", L"page.php", L"param1=value1¶m2=value2¶m3=value3¶m4=value4");
return 0;
}
And my function returned an answer:
<html>
<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>
<body bgcolor="white">
<center><h1>400 Bad Request</h1></center>
<center>The plain HTTP request was sent to HTTPS port</center>
<hr><center>nginx/1.0.10</center>
</body>
</html>
What am i doing wrong?
287
INTERNET_FLAG_SECURE should be used in the flags for HttpOpenRequest, not InternetConnect.
This is explained in the MSDN documentation for WinINet API flags:
INTERNET_FLAG_SECURE
0x00800000Uses secure transaction semantics. This translates to using Secure Sockets Layer/Private Communications Technology (SSL/PCT) and is only meaningful in HTTP requests. This flag is used by HttpOpenRequest and InternetOpenUrl, but this is redundant if
https://appears in the URL. The InternetConnect function uses this flag for HTTP connections; all the request handles created under this connection will inherit this flag.
81
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