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WinHttpGetProxyForUrl always returns ERROR_WINHTTP_BAD_AUTO_PROXY_SCRIPT when I test it with the below code.

See http://msdn.microsoft.com/en-us/library/aa384122%28VS.85%29.aspx for what I have tried to base this on.

Can anyone see any flaw in my code that causes this error to always return? I have tested it with many pac files and this is always the result.

NB. you will need to set 'http://proxy.rice.edu/proxy.pac' in Internet Explorer (Tools > Internet Options > Connections tab > LAN settings > 'Use automatic configuration script' address)

Many thanks.

#include <windows.h>
#include <winhttp.h>
#include <iostream>

#pragma comment(lib, "Winhttp")

using namespace std;
 
int main()
{
	HINTERNET httpsess = NULL;
	HINTERNET hConnect = NULL;
	HINTERNET hRequest = NULL;

	WINHTTP_AUTOPROXY_OPTIONS AutoProxyOptions;
	ZeroMemory(&AutoProxyOptions, sizeof(AutoProxyOptions));

	WINHTTP_PROXY_INFO ProxyInfo;
	DWORD ProxyInfoSize = sizeof(ProxyInfo);
	ZeroMemory(&ProxyInfo, sizeof(ProxyInfo));

	httpsess = WinHttpOpen(L"WinHTTP AutoProxy Sample/1.0", WINHTTP_ACCESS_TYPE_NO_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0);
	
	hConnect = WinHttpConnect(httpsess, L"www.microsoft.com", INTERNET_DEFAULT_HTTP_PORT, 0);
	
	hRequest = WinHttpOpenRequest( hConnect,  L"GET", L"/en/us/default.aspx", L"HTTP/1.1", WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, 0);

	AutoProxyOptions.dwFlags = WINHTTP_AUTOPROXY_CONFIG_URL;
	AutoProxyOptions.lpszAutoConfigUrl = L"http://proxy.rice.edu/proxy.pac";
	
	if (WinHttpGetProxyForUrl(httpsess, L"http://www.microsoft.com/en/us/default.aspx", &AutoProxyOptions, &ProxyInfo)) {
		cout << "WinHttpGetProxyForUrl OK\n";
	}
	
	else {
		 DWORD dwErr = GetLastError();
		 switch (dwErr)
		 {
			 case ERROR_WINHTTP_AUTO_PROXY_SERVICE_ERROR:
				 cout << "ERROR_WINHTTP_AUTO_PROXY_SERVICE_ERROR\n";
				 break;
			case ERROR_WINHTTP_INTERNAL_ERROR:
				 cout << "ERROR_WINHTTP_INTERNAL_ERROR\n";
				 break;
			case ERROR_WINHTTP_OPERATION_CANCELLED:
				 cout << "ERROR_WINHTTP_OPERATION_CANCELLED\n";
				 break;
			case ERROR_NOT_ENOUGH_MEMORY:
				 cout << "ERROR_NOT_ENOUGH_MEMORY\n";
				 break;
			 case ERROR_WINHTTP_AUTODETECTION_FAILED:
				 cout << "ERROR_WINHTTP_AUTODETECTION_FAILED\n";
				 break;
			 case ERROR_WINHTTP_BAD_AUTO_PROXY_SCRIPT:
				 cout << "ERROR_WINHTTP_BAD_AUTO_PROXY_SCRIPT\n";
				 break;
			 case ERROR_WINHTTP_INCORRECT_HANDLE_TYPE:
				 cout << "ERROR_WINHTTP_INCORRECT_HANDLE_TYPE\n";
				 break;
			 case ERROR_WINHTTP_INVALID_URL:
				 cout << "ERROR_WINHTTP_INVALID_URL\n";
				 break;
			 case ERROR_WINHTTP_LOGIN_FAILURE:
				 cout << "ERROR_WINHTTP_LOGIN_FAILURE\n";
				 break;
			 case ERROR_WINHTTP_UNABLE_TO_DOWNLOAD_SCRIPT:
				 cout << "ERROR_WINHTTP_UNABLE_TO_DOWNLOAD_SCRIPT\n";
				 break;
			 case ERROR_WINHTTP_UNRECOGNIZED_SCHEME:
				 cout << "ERROR_WINHTTP_UNRECOGNIZED_SCHEME\n";
				 break;
			 default:
				 cout << "Error\n";
		}
	}
			 
	if (ProxyInfo.lpszProxy != NULL) GlobalFree(ProxyInfo.lpszProxy); 
	if (ProxyInfo.lpszProxyBypass != NULL) GlobalFree(ProxyInfo.lpszProxyBypass);

	WinHttpCloseHandle(hRequest);
	WinHttpCloseHandle(hConnect);
	WinHttpCloseHandle(httpsess);
  
	return 0;
}

Edited by willgr: n/a

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Last Post by Massimo_1
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Hi,
I have the same problem with "WinHttpGetProxyForUrl" function.

I specify a valid url for a pac file and always return the error ERROR_WINHTTP_UNRECOGNIZED_SCHEME..

where was the problem?

Thank you for your help!

Best regards

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