wininet through proxy

[Cheezewizz]

Hey guys. I have a small problem trying to use the wininet API through a proxy. I appreciate there's plenty of threads more or less on this subject already but none seemed particularly relevant.

Basically, I do get a 200 OK response but the actual html returned is (i think) just from the ISA server saying 'under construction'.
Another thing is, even if I remove the username and password i still get the same response. i'd expect a different response from the proxy if they were wrong but that's not happening.

#include <stdio.h>
#include <string>
#include <windows.h>
#include <wininet.h>

HINTERNET g_hRoot;
HINTERNET g_hNetSession;
HINTERNET g_hHttpRequest;
DWORD g_dwError;
char g_buffer[512];
char g_headersbuffer[512];
int g_nBytesRead = 0;
char pszProxyUsername[] = "Username";
char pszProxyPassword[] = "Password";

int main(int argc, char* pszArgs[])
{
	std::string HtmlResponse;
	//get handle from internetopen()

	g_hRoot = InternetOpen("test", INTERNET_OPEN_TYPE_PROXY, "http://proxy", "8080", 0);
	if(g_hRoot == NULL)
		printf("InternetOpen() returned NULL\n");
		
	//connect to our opened handle
	g_hNetSession = InternetConnect(g_hRoot, "www.google.co.uk", INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);
	if(g_hNetSession == NULL)
		printf("InternetConnect() returned NULL\n");
		
	if(!InternetSetOption(g_hNetSession, INTERNET_OPTION_PROXY_USERNAME, (LPVOID)pszProxyUsername, strlen(pszProxyUsername)))
	{
		g_dwError = GetLastError();
		printf("internetsetoption() failed: %i\n", (int)g_dwError);
	}
	if(!InternetSetOption(g_hNetSession, INTERNET_OPTION_PROXY_PASSWORD, (LPVOID)pszProxyPassword, strlen(pszProxyPassword)))
	{
		g_dwError = GetLastError();
		printf("internetsetoption() failed: %i\n", (int)g_dwError);
	}
	
	//open our http request
	g_hHttpRequest = HttpOpenRequest(g_hNetSession, "GET", "", "HTTP/1.1", "", NULL, INTERNET_FLAG_KEEP_CONNECTION, 0);
	if(g_hHttpRequest == NULL)
		printf("HttpOpenRequest() returned NULL\n");
	if(!HttpSendRequest(g_hHttpRequest, NULL, 0, NULL, 0))
	{
		g_dwError = GetLastError();
		printf("HttpSendRequest() failed\nError code %d\n", (int)g_dwError);
	}
	//have sent request now ready to read response
	DWORD dwLength = (DWORD)sizeof(g_headersbuffer);
	if(!HttpQueryInfo(g_hHttpRequest, HTTP_QUERY_RAW_HEADERS_CRLF, g_headersbuffer, &dwLength, NULL))
	{
		g_dwError = GetLastError();
		printf("\nhttpqueryinfo() failed: %i\n", (int)g_dwError);
	}
	
	InternetReadFile(g_hHttpRequest, g_buffer, sizeof(g_buffer), (DWORD*)&g_nBytesRead);
	while(g_nBytesRead > 0)
	{
		HtmlResponse.append(g_buffer, g_nBytesRead);
		InternetReadFile(g_hHttpRequest, g_buffer, sizeof(g_buffer), (DWORD*)&g_nBytesRead);
	}
	printf("%s\n", HtmlResponse.c_str());
	printf("\n%s\n", g_headersbuffer);
	//all done, cleanup
	InternetCloseHandle(g_hRoot);
	InternetCloseHandle(g_hNetSession);
	InternetCloseHandle(g_hHttpRequest);
	return 0;
}

Sorry for the lengthy post, by the way this is compiled with mingw. No errors are thrown up but it just ain't giving the expected results.... any suggestions anyone?

[Cheezewizz]

Bah the problem is me obviously.

	g_hRoot = InternetOpen("test", INTERNET_OPEN_TYPE_PROXY, "http://proxy", "8080", 0);

Should be

	g_hRoot = InternetOpen("test", INTERNET_OPEN_TYPE_PROXY, "proxy:8080", "<local>", 0);

Despite the fact I was staring at MSDN til my eyes hurt i still managed to miss that. It was only when I finally got a 400 Bad Request response that I tracked down where i was going wrong.... cheers anyways peeps...