System.net，mono和.Net之间的httpPOST兼容性

Question

I'm tring to write a little program to download a PDF from a newspaper website that requires a login. I'm using this library found on stackoverflow: http://pastebin.com/RPNU39vF

And I call it with this code:

   private void backupFunzionante()
    {
        String postData = "log=MYEMAIL@gmail.com&pwd=MYPASSWORD";
        myWeb.RequestManager manager = new myWeb.RequestManager();

        String uri = "http://shop.ilfattoquotidiano.it/login/?action=login";
        HttpWebResponse response;

        response = manager.SendPOSTRequest(uri, postData, null, null, true);
        String strResp = response.StatusCode.ToString();
        label1.Text += "###";

        Uri pdfUrl = new Uri("http://pdf.ilfattoquotidiano.it/openpdf/?n=20120927");
        response = manager.SendPOSTRequest("http://pdf.ilfattoquotidiano.it/openpdf/?n=20120927", "", null, null, true);
        long size = response.ContentLength;

        Stream downloadStream = response.GetResponseStream();

        using (Stream file = File.OpenWrite("C:\\f.pdf"))
        {
            CopyStream(downloadStream, file);
        }
    }

    public static void CopyStream(Stream input, Stream output)
    {
        byte[] buffer = new byte[8 * 1024];
        int len;
        while ((len = input.Read(buffer, 0, buffer.Length)) > 0)
        {
            output.Write(buffer, 0, len);
        }
    }

This code works perfectly if run under .NET, while it returns a empty file if called under mono.

I think the problem should be in http post request, because size in long size = response.ContentLength; is zero.

Why there is this difference between the two executables? What I can do to have a fully portable application (I would like to use it also under linux because it is my primary OS)

Thank you for your help.

Answer 1

Mono for Windows has bugs that may not be present in Mono for Linux/Macintosh, because Mono for Windows has never been a priority (because for that OS there is already Micosoft's .NET).

I recommend you testing with Mono for Linux first. It may work fine. (For that, obviously you'll need to replace "C:\\" with a native unix path.)