There are classes that mimic the old WinInet API?

[dev]

Hi to all,

I am a sofware developer with few months experience in C#. I worked in C/C++
and, time ago, developed an application to receive a video-stream (MJPEG)
via http.

Simply I used the standard WinInet API such as InternetOpen(),
InternetConnect(), HttpOpenRequest(), InternetReadFile() and so on...

I just wanted to know what classes in C# accomplish those basic http
functions. If you can point me to the correct reference on MSDN .NET or some
tutorials/docs on the web.

Thanks a lot

Dev[eloper].

 

[Anthony Yio]

You can use PInvoke to call the Win23 API.

or try to look into System.Net for the goodies that they have.

 

[dev]

Thank Anthony for your reply,

But I want to avoid calling directly the native API, too much problems and
overhead work (but still a feasible road if I can't find what I want).

Also, I was searching on System.Net but got confused about FileRequest,
HttpRequest and so on.

Any more precise hints?

Bye

Dev

You can use PInvoke to call the Win23 API.

or try to look into System.Net for the goodies that they have.

Hi to all,

I am a sofware developer with few months experience in C#. I worked in C/C++
and, time ago, developed an application to receive a video-stream (MJPEG)
via http.

Simply I used the standard WinInet API such as InternetOpen(),
InternetConnect(), HttpOpenRequest(), InternetReadFile() and so on...

I just wanted to know what classes in C# accomplish those basic http
functions. If you can point me to the correct reference on MSDN .NET or some
tutorials/docs on the web.

Thanks a lot

Dev[eloper].

 

[Sam Gentile [MVP - C#/.NET]]

What specifically are you having a problem with in System.Net so that we may
better answer your question? System.Net has everything you need. There is no
need to go to native code.

--
----------------------------------
Sam Gentile
MVP - C#/.NET
INETA Speaker http://www.ineta.org/DesktopDefault.aspx
Read my blog at http://samgentile.com/blog/
------------------------------------------------------

Thank Anthony for your reply,

But I want to avoid calling directly the native API, too much problems and
overhead work (but still a feasible road if I can't find what I want).

Also, I was searching on System.Net but got confused about FileRequest,
HttpRequest and so on.

Any more precise hints?

Bye

Dev

You can use PInvoke to call the Win23 API.

or try to look into System.Net for the goodies that they have.

Hi to all,

I am a sofware developer with few months experience in C#. I worked in C/C++
and, time ago, developed an application to receive a video-stream (MJPEG)
via http.

Simply I used the standard WinInet API such as InternetOpen(),
InternetConnect(), HttpOpenRequest(), InternetReadFile() and so on...

I just wanted to know what classes in C# accomplish those basic http
functions. If you can point me to the correct reference on MSDN .NET

or
some

tutorials/docs on the web.

Thanks a lot

Dev[eloper].

 

[dev]

Dear Sam,

What class is needed to read a binary file from an http server (my camera
furnish a MJPEG stream)?

I was surfing on the doc about HttpWebRequest, I doesn't recognize any
method similar to the WinInet. But is it (HttpWebRequest) the class I need?
Any Sample around?

Thanks.

PS: You have an Italian surname, are you originating from that place?

What specifically are you having a problem with in System.Net so that we may
better answer your question? System.Net has everything you need. There is no
need to go to native code.

--
----------------------------------
Sam Gentile
MVP - C#/.NET
INETA Speaker http://www.ineta.org/DesktopDefault.aspx
Read my blog at http://samgentile.com/blog/
------------------------------------------------------

Thank Anthony for your reply,

But I want to avoid calling directly the native API, too much problems and
overhead work (but still a feasible road if I can't find what I want).

Also, I was searching on System.Net but got confused about FileRequest,
HttpRequest and so on.

Any more precise hints?

Bye

Dev

You can use PInvoke to call the Win23 API.

or try to look into System.Net for the goodies that they have.


Hi to all,

I am a sofware developer with few months experience in C#. I worked in
C/C++
and, time ago, developed an application to receive a video-stream (MJPEG)
via http.

Simply I used the standard WinInet API such as InternetOpen(),
InternetConnect(), HttpOpenRequest(), InternetReadFile() and so on...

I just wanted to know what classes in C# accomplish those basic http
functions. If you can point me to the correct reference on MSDN .NET or
some
tutorials/docs on the web.

Thanks a lot

Dev[eloper].

 

[Joerg Jooss]

Dear Sam,

What class is needed to read a binary file from an http server (my
camera furnish a MJPEG stream)?

I was surfing on the doc about HttpWebRequest, I doesn't recognize any
method similar to the WinInet. But is it (HttpWebRequest) the class I
need? Any Sample around?

Well, it's hard to compare a procedural API with and OO API, but
(Http)WebRequest is what you want.

Here's a sample C# method for HTTP GETting a web resource and dumping it on
the console:

public void Get(Uri uri) {
WebRequest request = WebRequest.Create(uri);

using (Stream responseStream =
request.GetResponse().GetResponseStream()) {
MemoryStream memoryStream = new MemoryStream(0x10000);
byte[] buffer = new byte[0x1000];
int bytes;
while ((bytes = responseStream.Read(buffer, 0, buffer.Length)) > 0)
{
memoryStream.Write(buffer, 0, bytes);
}


// Assume ISO-8859-1 encoding of web resource -- normally we'd parse
this
// from the Content-Type header.
byte[] response = memoryStream.ToArray();
string text = Encoding.GetEncoding(28591).GetString(response);
Console.WriteLine(text);
}
}

If you replace the MemoryStream with a FileStream and remove the console
ouput, you have a basic download-to-file method.

Cheers,

 

[dev]

Thank you very much Joerg. This helps!

Dev

Dear Sam,

What class is needed to read a binary file from an http server (my
camera furnish a MJPEG stream)?

I was surfing on the doc about HttpWebRequest, I doesn't recognize any
method similar to the WinInet. But is it (HttpWebRequest) the class I
need? Any Sample around?

Well, it's hard to compare a procedural API with and OO API, but
(Http)WebRequest is what you want.

Here's a sample C# method for HTTP GETting a web resource and dumping it on
the console:

public void Get(Uri uri) {
WebRequest request = WebRequest.Create(uri);

using (Stream responseStream =
request.GetResponse().GetResponseStream()) {
MemoryStream memoryStream = new MemoryStream(0x10000);
byte[] buffer = new byte[0x1000];
int bytes;
while ((bytes = responseStream.Read(buffer, 0, buffer.Length)) > 0)
{
memoryStream.Write(buffer, 0, bytes);
}


// Assume ISO-8859-1 encoding of web resource -- normally we'd parse
this
// from the Content-Type header.
byte[] response = memoryStream.ToArray();
string text = Encoding.GetEncoding(28591).GetString(response);
Console.WriteLine(text);
}
}

If you replace the MemoryStream with a FileStream and remove the console
ouput, you have a basic download-to-file method.

Cheers,