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JohnOne

Web Page and HTTP

4 posts in this topic

Is there anything special which needs to be included in a web page (html, php, etc...) which allows it to respond to HTTP requests?

code verbatim from msdn

int _tmain(int argc, _TCHAR* argv[])
{


    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.google.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);

    // Keep checking for data until there is nothing left.
    if (bResults)
        do 
        {
            // Check for 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 any open handles.
    if (hRequest) WinHttpCloseHandle(hRequest);
    if (hConnect) WinHttpCloseHandle(hConnect);
    if (hSession) WinHttpCloseHandle(hSession);
    
    return 0;
}

When I try this, all works fine, but on another page with just a "line of text"

it does not.

the line indicated is printed. "Error 12175 has occured"

WinINet failed to perform content decoding on the response. For more information, see the Content Encoding topic.

I'm http complete noob.

AutoIt Absolute Beginners    Require a serial    Pause Script    Video Tutorials by Morthawt   ipify 

Monkey's are, like, natures humans.

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#2 ·  Posted (edited)

In the page the error number pointed to, I read...

"The Accept-Encoding header must be present in the request, and it must specify the gzip, deflate, or both gzip and deflate encoding schemes.

The encoding scheme specified in the Content-Encoding header must match one of the encoding schemes specified in the Accept-Encoding header."

What even is an "Accept-Encoding header".

Obviously something to do with my problem.

EDIT:

I just downloaded some other library I found knocking about the internet that seems to work just fine.

Thanks for looking anyway.

Edited by JohnOne

AutoIt Absolute Beginners    Require a serial    Pause Script    Video Tutorials by Morthawt   ipify 

Monkey's are, like, natures humans.

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Accept-Encoding is an HTTP parameter, which has nothing to do with the content itself. It has to do with the server encoding the data using a compression mechanism before transmission.

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