HTTP.TestConnection Examples

boolean HTTP.TestConnection (

Example 1

IsConnected = HTTP.TestConnection("http://www.google.ca", 20, 80, nil, nil);
if (IsConnected == false) then
Dialog.Message("Notice", "No Internet connection was detected.");
end

Checks the user's Internet connection by trying to connect to the site "http://www.google.ca." If the connection fails, a dialog would be displayed notifying the user.

Example 2

-- Check to see if the user is connected to the internet
connected = HTTP.TestConnection("http://www.indigorose.com", 20, 80, nil, nil);

-- If they are connected.
if connected then
    -- Download a file to their temporary directory.
    StatusDlg.Show(MB_ICONNONE, false);
    HTTP.Download("http://www.indigorose.com/setup.exe", _TempFolder.."\\setup.exe", MODE_BINARY, 20, 80, nil, nil, nil);

    -- Get any error codes that may have been returned by the download action.
    error = Application.GetLastError();
    StatusDlg.Hide();

    -- If there was an error during the download, display the error message.
    if error ~= 0 then
        result = Dialog.Message("Error", _tblErrorMessages[error], MB_OK, MB_ICONEXCLAMATION, MB_DEFBUTTON1);

    -- If there was no error during the download.
    else
        --Get the CRC value of the downloaded file.
        crc_value = File.GetCRC(_TempFolder.."\\setup.exe");
        -- Check to see if the CRC value matches it's expected value.
        if crc_value == 824907888 then

            -- Run the exectuable that was downloaded.
            File.Run(_TempFolder.."\\setup.exe", "", "", SW_SHOWNORMAL, true);

        -- The CRC value does not match. Display an error message to the user.
        else
            result = Dialog.Message("Error", "The downloaded file is incomplete. Please try downloading again.", MB_OK, MB_ICONSTOP, MB_DEFBUTTON1);
        end
    end

-- Display a notice informing them that they are not connected.
else
    Dialog.Message("Internet Error", "You are not connected to the internet. Please connect to download.");
end

This example first checks to see if the user has an internet connection using the HTTP.TestConnection action. If they do, a file is downloaded to their temporary directory. That file is then checked to make sure it is complete and not corrupt before launching it. A series of checks are performed in this script to handle any errors that occur and displays notification messages to the user if any actions fail.

Note: _TempFolder is a built-in variable that contains the path to the user's system "Temp" folder.