Socket appeasement

[Kevinyy]

Ok so if i want to block any url's that include ex: "http://ad." from being sent via socket once requested by a client application. once i block that AD request from being sent out, do i have to send a socket of identical size(identical sizeof the AD) so the client doesnt keep asking for it? or how to i take care of that?

I am requesting pages for the client like this:

System.Net.Configuration.HttpWebRequestElement wr = new System.Net.Configuration.HttpWebRequestElement();
            wr.UseUnsafeHeaderParsing = true;
            try
            {
                WebResponse response = (WebResponse)WebRequest.Create(url).GetResponse();
                Stream responsestream = response.GetResponseStream();

Or, if the request from the client is an invalid request(cannot be resolved) how to i make the browser stop waiting for me to reply a response?

[Plater]

Could you reply back with the client with the correct HTTP headers/response?
Something like 404 Not found or 403 Forbidden or 408 Request Timeout


For more possibilities:

http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

[Kevinyy]

Just that doesnt do it, it the client browser still thinks there is more coming so it waits...
here is the code format i use to send the 40x error:

sent with: SError (soket, 403, "Forbidden" , "AD");

public void SError(Socket soket,int eNum, string eType, string eMessage)
        {
            SendMessage(soket, "HTTP/1.1" + " " + eNum + " " + eType + "\r\n");
            SendMessage(soket, "Content-Type: text/plain" + "\r\n");
            SendMessage(soket, "\r\n");
            SendMessage(soket, eNum + " " + eType + "\r\n");
            SendMessage(soket, eMessage + "\r\n");
        }
private void SendMessage(Socket soket, string sage)
        {
            Byte[] duff = new Byte[sage.Length];
            Int32 SeMESSAGE = Encoding.ASCII.GetBytes(sage, 0, sage.Length, duff, 0);
            try
            {
                soket.Send(duff, SeMESSAGE, 0);
            }
            catch (Exception a)
            {
                Console.WriteLine("Error: {0}", a.Message);
            }
        }

I would like to send the message 403 and have the client browser stop working on the blocked request, how can i do so?

[Plater]

Well sending it the 403 error with correct header types, SHOULD have made it stop.
Try using the 404 error maybe?

[Kevinyy]

Well sending it the 403 error with correct header types, SHOULD have made it stop.
Try using the 404 error maybe?

ive tried both, is my header format correct?

[Plater]

You should be able to return this:
"HTTP/1.0 404 Not Found\r\n\r\n"

http://www.w3.org/Protocols/HTTP/1.0/spec.html#Response

[Kevinyy]

You should be able to return this:
"HTTP/1.0 404 Not Found\r\n\r\n"

http://www.w3.org/Protocols/HTTP/1.0/spec.html#Response

Alright, ill try that and let you know; Thanks

[Kevinyy]

No sucess...im using foxfire3, and when ever i request ex: sadkjsadsafj.co m my program recognizes that it isnt a real address and sends:

private void SendMessage(Socket soket)
 {
            string sage="HTTP/1.0 404 File Not Found\n\r\n\r";
            Byte[] fe = new Byte[0x400];
            Int32 SeMessage = Encoding.ASCII.GetBytes(sage, 0, sage.Length, fe, 0);
            try
            {
                soket.Send(fe, SeMessage, 0);
            }
            catch (Exception a)
            {
                Console.WriteLine("Error: {0}", a.Message);
            }
}

but the browser just keeps waiting and waiting as if the page is going to load..

[Plater]

the \r needs to come first.
I also don't understand your socket code. What is all that buisness you are doing there?

I woulda just done this:

private void SendMessage(Socket soket)
 {
            string sage="HTTP/1.0 404 File Not Found\r\n\r\n";
            byte[] payload = Encoding.ASCII.GetBytes(sage);
            try
            {
                soket.Send(payload);
            }
            catch (Exception a)
            {
                Console.WriteLine("Error: {0}", a.Message);
            }
}

[Kevinyy]

the \r needs to come first.
I also don't understand your socket code. What is all that buisness you are doing there?

I woulda just done this:

private void SendMessage(Socket soket)
 {
            string sage="HTTP/1.0 404 File Not Found\r\n\r\n";
            byte[] payload = Encoding.ASCII.GetBytes(sage);
            s.Send(payload);
            try
            {
                soket.Send(payload);
            }
            catch (Exception a)
            {
                Console.WriteLine("Error: {0}", a.Message);
            }
}

how would i define "s"?
i just commented it out and now have this for testing:

public void SendMessage(Socket soket)
        {
            string sage = "HTTP/1.0 404 File Not Found\r\n\r\n";
            byte[] payload = Encoding.ASCII.GetBytes(sage);
                //s.Send(payload);
            try
            {
                soket.Send(payload);
            }
            catch (Exception a)
            {
                Console.WriteLine("Error: {0}", a.Message);
            }
        }

and firefox still waits on this

[Plater]

s.Send(payload) was a typeo, and shouldn't have been in here.

[Plater]

Have you used firebug in FF to see what is going on?
FF should be standards compliant and close itself.

You could try ammending the message to this:
string sage = "HTTP/1.0 404 File Not Found\r\nConnec tion: close\r\n\r\n";

[Kevinyy]

Have you used firebug in FF to see what is going on?
FF should be standards compliant and close itself.

You could try ammending the message to this:
string sage = "HTTP/1.0 404 File Not Found\r\nConnec tion: close\r\n\r\n";

firebug is for html type. but i tried it anyways :)
ok well now when my program cant resolve the address it sends that amended string and firefox doesnt wait anymore!
we are making progress!

But... when i block the ad's and manually send the same amended 404; firefox continues to wait. why doesnt it work here?

[Plater]

Well, you could also CLOSE the socket, that would also get FF to stop waiting.

also, firebug does like everything.
it will tell you every request/response made for the page.
so if you load a page with 4 pictures and one linked CSS file, it will show you all the requests/responses for those 4 pictures and the css file.

[Kevinyy]

i was hoping for a way to accomplish this without closing the socket (althought the way i coded my programming closing the socket wouldnt be a big deal- i dont think)
I'll give it a try, and also play around with firebug some more.