• DNewbie <run3 myopera.com> Feb 10 2012
• nrgyzer <nrgyzer gmail.com> Feb 10 2012

DNewbie <run3 myopera.com> writes:

nrgyzer,
please check the return value of 'receive'.

http://dlang.org/phobos/std_socket.html#receive



On Fri, Feb 10, 2012, at 02:06 PM, nrgyzer wrote:
 Works perfectly, thanks :)
 But... how can I read the complete HTTP-header? When I try the following:
 
 	string header;
 	ubyte[1024] buffer;
 	while (cs.receive(buffer)) header ~= buffer;
 
 ... it works as long as the header doesn't have a length like 1024, 2048,
 3072... Otherwise cs.receive() blocks forever and the server doesn't
 respond
 anything. Is there any solution how to prevent/solve this problem?
 
 
 == Auszug aus DNewbie (run3 myopera.com)'s Artikel
 Try this
 	while(true) {
 		Socket cs = s.accept();
 		cs.receive(new byte[1024]);
 		cs.sendTo("HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello


 		cs.close();
 	}
 On Thu, Feb 9, 2012, at 07:31 PM, Nrgyzer wrote:
 Hi guys,

 I wrote the following few lines:

 private {

 	import std.socket;

 }

 void main() {

 	Socket s = new TcpSocket();
 	s.bind(new InternetAddress(80));
 	s.listen(0);

 	while(true) {

 		Socket cs = s.accept();
 		cs.sendTo("HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello




 		cs.close();

 	}

 	s.close();

 }

 The code compiles successfully and I also the server also responses with
 "Hello World", but when I reload the page I sometimes get the following
 error (Firefox): "The
 connection was reset" - I also often get the same error in other
 browsers. Is there anything wrong with the code?

 Thanks in advance!




 



-- 
  
  D

nrgyzer <nrgyzer gmail.com> writes:

Yep, thanks... but I already checked out the return value and the problem is
"If the socket is blocking, receive waits until there is data to be received.".
The following
socket blocks and the server doesn't respond:

while(true) {

	Socket cs = s.accept();
	ubyte[] header;
	ubyte[1] buffer;
	while (cs.receive(buffer)) header ~= buffer;

	cs.sendTo("HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello World");
	cs.close();

}

cs.receive() blocks (because no more data is available) - cs.sendTo() and
cs.close() isn't called, because cs.receive() waits for more data. I can solve
the problem by using
non-blocking sockets:

while(true) {

	Socket cs = s.accept();
	cs.blocking(false);
	ubyte[] header;
	ubyte[1] buffer;
	while (cs.receive(buffer)) header ~= buffer;

	cs.sendTo("HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello World");
	cs.close();

}

But... how can I make sure that I got all data sent by the client/browser?

== Auszug aus DNewbie (run3 myopera.com)'s Artikel
 nrgyzer,
 please check the return value of 'receive'.
 http://dlang.org/phobos/std_socket.html#receive
 On Fri, Feb 10, 2012, at 02:06 PM, nrgyzer wrote:
 Works perfectly, thanks :)
 But... how can I read the complete HTTP-header? When I try the following:

 	string header;
 	ubyte[1024] buffer;
 	while (cs.receive(buffer)) header ~= buffer;

 ... it works as long as the header doesn't have a length like 1024, 2048,
 3072... Otherwise cs.receive() blocks forever and the server doesn't
 respond
 anything. Is there any solution how to prevent/solve this problem?


 == Auszug aus DNewbie (run3 myopera.com)'s Artikel
 Try this
 	while(true) {
 		Socket cs = s.accept();
 		cs.receive(new byte[1024]);
 		cs.sendTo("HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello


 		cs.close();
 	}
 On Thu, Feb 9, 2012, at 07:31 PM, Nrgyzer wrote:
 Hi guys,

 I wrote the following few lines:

 private {

 	import std.socket;

 }

 void main() {

 	Socket s = new TcpSocket();
 	s.bind(new InternetAddress(80));
 	s.listen(0);

 	while(true) {

 		Socket cs = s.accept();
 		cs.sendTo("HTTP/1.1 200 OK\r\nContent-Length: 11\r\n\r\nHello




 		cs.close();

 	}

 	s.close();

 }

 The code compiles successfully and I also the server also responses with
 "Hello World", but when I reload the page I sometimes get the following
 error (Firefox): "The
 connection was reset" - I also often get the same error in other
 browsers. Is there anything wrong with the code?

 Thanks in advance!