Simple embedded HTTP server library

[Pointy]

I had another error last night, which I think happened after my PC dropped off the network.(It was connected to the Pi3 at the time)

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An existing connection was forcibly closed by the remote host.

   at System.IO.StreamOperationAsyncResult.ThrowWithIOExceptionDispatchInfo(Exception e)
   at System.IO.StreamOperationAsyncResult.ProcessCompletedOperation()
   at System.IO.WinRtToNetFxStreamAdapter.EndRead(IAsyncResult asyncResult)
   at System.IO.WinRtToNetFxStreamAdapter.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.IO.BufferedStream.Read(Byte[] array, Int32 offset, Int32 count)
   at Feri.MS.Http.HttpRequest.Init(StreamSocket data)
Exception thrown: 'System.NullReferenceException' in HttpServer.dll

The error was thrown at line 337 in HttpServer.cs.(_hrequest.HttpConnection was null)...

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_log.WriteLine("Error:" + DateTime.Now.ToString("R") + ": " + _hrequest.HttpConnection.RemoteHost + ": " + _hrequest.HttpConnection.LocalHost + ": " + _hrequest.RequestString().TrimEnd());

Regards,

Les

[miha1]

Hello,

Thank you for the error report.

Crash was caused by framework closing connection during input stream read operation, caused by client disconnect. (both errors you reported are related)

I fixed the issue and uploaded version 2.0.4 to the github.

Isue here is, integrity of data we recived up to this point is compromised and attempting to parse it would most likely fail. For this reason we discard the content of the input buffer and report init failed to HttpServer.
This will cause the HttpServer to write log entry and attempt to send error 500 to the client. Since client is disconnected, nothing will be sent.

With kind regards,

------
Miha

[Pointy]

Thanks again for the update, and I am sorry to keep doing this to you but I had another crash today. (My network is playing up, and I think it's time for a new router!)

Crash happened after the network dropped...

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Exception thrown: 'System.Runtime.InteropServices.COMException' in HttpServer.dll
WinRT information: An existing connection was forcibly closed by the remote host.

Additional information: An existing connection was forcibly closed by the remote host.

An existing connection was forcibly closed by the remote host.

httpserver.cs: line 277

listener.ConnectionReceived += (sender, args) => ProcessRequestAsync(args.Socket);

Regards,

Les

[miha1]

Hello,

I am happy to get bug reports, it leads to more reliable code, so don't worry about it.

As far as i can tell, the error you got is framework error ConnectionResetByPeer, caused by dropped connection.
I changed the code, so it should hopefully resolve the issue. Connection drops are a bit random and hard to test; my test Win IoT have been connected to internet and running without error for over a month now.

I also added a bit more verbose error messages if exception is thrown.

With kind regards,

----
Miha

[Pointy]

I am happy to get bug reports, it leads to more reliable code, so don't worry about it.

Well you will be pleased to know I have installed a new router, so Maybe I won't crash your software so much.

Connection drops are a bit random and hard to test; my test Win IoT have been connected to internet and running without error for over a month now.

I got another crash yesterday, when replacing the router, So I am guessing rebooting your modem/router with an open connection would be a good test.

On another note, any plans to add file/folder support for the web files? Embedding them is a pain and limits the customisation of the end product.

Regards,

Les

[miha1]

Well you will be pleased to know I have installed a new router, so Maybe I won't crash your software so much.

I got another crash yesterday, when replacing the router, So I am guessing rebooting your modem/router with an open connection would be a good test.

With 0.2.0.6? it should not have crashed, can you post the error message?

On another note, any plans to add file/folder support for the web files? Embedding them is a pain and limits the customisation of the end product.

I agree, and actually, there are plans! I was working on extended data source support in development branch, but it's a bit delayed due to virtual site (ability to host multiple sites on single server) support. Api support is there, but provider was not implemented yet. It is still on to-do list and will be implemented soon. Currenty, development branch does not compile/work, due to virtual site work, though.

With kind regards,

----
Miha

[Pointy]

With 0.2.0.6? it should not have crashed, can you post the error message?

It was before I upgraded to 0.2.0.6 and was the same error as before, I will let you know if I get any more crashes with the latest version.

I agree, and actually, there are plans! I was working on extended data source support in development branch, but it's a bit delayed due to virtual site (ability to host multiple sites on single server) support. Api support is there, but provider was not implemented yet. It is still on to-do list and will be implemented soon. Currenty, development branch does not compile/work, due to virtual site work, though.

Glad to know it's on the list, I will keep an eye out for it, in future versions.

Regards,

Les

[slafoy]

I have been using the for a couple weeks now. Nice job on it!

I have been controlling a pi from a pi with a screen. I have had to use the ip address of the slave pi to be able to control it. That was fine until the ip address changes then I have to change it in the app controlling it. Is there a way to find the server on a local network by name?

[Alejandro3071]

Hi!! First of all thank the development, I'm just starting to use it. I found something curious and it is mentioned that the basic function would suffice to call

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 server = new HttpServer();
            server.Start();

But when you run you always send the error of: System.NullReferenceException en la siguiente sección de HttpServer.cs

Error1

Error1.PNG (29.77 KiB) Viewed 3364 times

The error occurs because of _ RootManager that at no time is set to a value.
Somewhere is missing the call to:

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public IHttpRootManager HttpRootManager
        {
            get
            {
                if (_rootManager == null)
                {
                    _rootManager = new DefaultHttpRootManager();
                    _rootManager.AddSource(new EmbeddedContent(this.GetType()));
                    _rootManager.Start(this);
                }
                return _rootManager;
            }
            set
            {
                if (_rootManager != null)
                {
                    _rootManager.Stop();
                }
                _rootManager = value;
                _rootManager.Start(this);
            }
        }

So that it works in a basic way and with the page by default

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server = new HttpServer();
            server.Start();
            IHttpRootManager ser = server.HttpRootManager;

A little detail! I don't know where it would be modified to be grabbed by default. I will continue working with the bookstore again thank you very much for the development I hope not to leave it. Best regards!!

[colonelsoftware]

Hello,

Thanks for the post.
I am new to Windows IOT and i am unable to understand the steps that how to debug the project.
Can you please describe the steps for integrate the same.

Thanks & regards
ColonelSoftware