Web request in C++

[Oxuyan]

Hi,

I am writing program in C#. But I have problem with .Net. So I need some code in C++.

My problem:
I need to send web request to my IP camera and receive jpeg image. I can get image only if I send by Http protocol version 0.0
But .Net supports only Http protocol version 1.0 and 1.1. (by these protokols version responce from ip camera has content type text/html, but by protokol 0.0 responce content type image/jpeg)

Please, can anybody write to me code in C++(not .Net) equivalent to this C# code:

 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
 
namespace somenamespace
{
    static public class IpCameraRequest
    {
        static public bool GetBitmapFromHttpRequest(String link, String filePath)
        {
 
            // Create web request
            // e.g for "http:// 111.11.11.11 /liveimg.cgi"
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(link);
 
            // set login and password 
            string login = "admin";
            string password = "admin";
            request.Credentials = new NetworkCredential(login, password);
 
            // set version of http protocol
            // I need version 0.0, but .Net dont support this version !!!!!! 
            request.ProtocolVersion = HttpVersion.Version10;
 
            // get web response
            HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse();
 
            // get stream from response
            StreamReader responseStream = new StreamReader(webResponse.GetResponseStream());
            Stream stream = responseStream.BaseStream;
 
            // get string representation from stream  (not important)
            string stringResponseStream = responseStream.ReadToEnd();
 
            // try to get bitmap from stream and save to file
            try
            {
                Bitmap bmp = (Bitmap)Bitmap.FromStream(stream);
                bmp.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);
                return true;
            }
            catch //(Exception ex)
            {
                //MessageBox.Show("error " + ex.Message);
                return false;
            }
        }
    }
}
 

Thanks in advance.

[kbw]

There was never a HTTP 0.0, you probably mean version HTTP 0.9. The first defined version was HTTP 1.0 in RFC 1945. HTTP 0.9 is an incomplete implementation of HTTP 1.0, a retro version.

If you don't send the version number, 0.9 is assumed.

[Oxuyan]

kbw, Thanks for answer.

The link of JpegStream of IP camera is
http://xxx.xx.xx.xxx/liveimg.cgi
Browser simultaneously shows jpeg image.

But in code I qet bytes and they decoded to simple html file.

when I use Socket class and send to socket

GET /liveimg.cgi HTTP/0.0

I receive image bytes with header ... content-type = image/jpeg ...

and if I send to Socket class

GET /liveimg.cgi HTTP/1.0
or
GET /liveimg.cgi HTTP/1.1

I receive html bytes with header ... content-type = html/text ...

By telnet same situation.

What did you think about this situation?
Can you write C++ equivalent of appointed C# code?

[kbw]

A 1.1 request has more fields than you're specifying. You really need to read up on the protocol or look at what a 1.1 compliant browser sends or both. You can't just poke about and hope for the best.

Like I said, there's no 0.0, you should omit the version for 0.9. That's probably what the camera is using when you send 0.0. If that's what works, then you could stick with that.