digitalmars.D.learn - Socket: The connection was reset
- Nrgyzer (19/19) Feb 09 2012 Hi guys,
- DNewbie (11/47) Feb 09 2012 Try this
- nrgyzer (11/55) Feb 10 2012 Works perfectly, thanks :)
- DNewbie (7/69) Feb 10 2012 nrgyzer,
- nrgyzer (23/89) Feb 10 2012 Yep, thanks... but I already checked out the return value and the proble...
- DNewbie (3/40) Feb 10 2012 It depends on the protocol. In HTTP you should check if the receive buff...
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 World");
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!
Feb 09 2012
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 World");
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 World");
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
Feb 09 2012
nrgyzer <nrgyzer gmail.com> 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 ArtikelTry 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\nHelloWorld");cs.close(); } On Thu, Feb 9, 2012, at 07:31 PM, Nrgyzer wrote:World");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\nHellocs.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!
Feb 10 2012
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-- DTry 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\nHelloWorld");cs.close(); } On Thu, Feb 9, 2012, at 07:31 PM, Nrgyzer wrote:World");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\nHellocs.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!
Feb 10 2012
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
World");
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
World");
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!
Feb 10 2012
On Fri, Feb 10, 2012, at 07:44 PM, nrgyzer wrote:
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?
It depends on the protocol. In HTTP you should check if the receive buffer
contains CRLF CRLF:
http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Example_session
Feb 10 2012