Hello

I'm trying to connect to server and send data, with such simple client:

#!/usr/bin/rdmd

import std.stdio;
import std.socket;
import std.socketstream;
import std.process;
import std.conv;
import core.time;

void main()
{
        char[1024] buffer = 0;

        Socket client = new TcpSocket();
        auto addrServer = new InternetAddress("localhost", 8080);
        client.connect(addrServer);

        while(1)
        {

                client.send(readln());
                client.receive(buffer);
                writeln(buffer);
                buffer = 0;
         }
}

It is working but only one time, when I'm trying to send again (second loop of while) it's stooping on readln() but not sending input data.

What am i missing here?

Thanks in advance for any help.

On Thursday, 24 September 2015 at 14:20:39 UTC, holo wrote:
> Hello
>
> I'm trying to connect to server and send data, with such simple client:
>
> #!/usr/bin/rdmd
>
> import std.stdio;
> import std.socket;
> import std.socketstream;
> import std.process;
> import std.conv;
> import core.time;
>
> void main()
> {
>         char[1024] buffer = 0;
>
>         Socket client = new TcpSocket();
>         auto addrServer = new InternetAddress("localhost", 8080);
>         client.connect(addrServer);
>
>         while(1)
>         {
>
>                 client.send(readln());
>                 client.receive(buffer);
>                 writeln(buffer);
>                 buffer = 0;
>          }
> }
>
> It is working but only one time, when I'm trying to send again (second loop of while) it's stooping on readln() but not sending input data.
>
> What am i missing here?
>
> Thanks in advance for any help.

Where is the other side of this client? There must be a TCP Server to listen connections, and create a second TCPSocket for communication. There is only one TCPSocket in your code. A lot of things are missing there. I would suggest you to check "C TCPSocket example" in your favourite search engine.

On Friday, 25 September 2015 at 04:38:06 UTC, tcak wrote:
> On Thursday, 24 September 2015 at 14:20:39 UTC, holo wrote:
>> Hello
>>
>> I'm trying to connect to server and send data, with such simple client:
>>
>> #!/usr/bin/rdmd
>>
>> import std.stdio;
>> import std.socket;
>> import std.socketstream;
>> import std.process;
>> import std.conv;
>> import core.time;
>>
>> void main()
>> {
>>         char[1024] buffer = 0;
>>
>>         Socket client = new TcpSocket();
>>         auto addrServer = new InternetAddress("localhost", 8080);
>>         client.connect(addrServer);
>>
>>         while(1)
>>         {
>>
>>                 client.send(readln());
>>                 client.receive(buffer);
>>                 writeln(buffer);
>>                 buffer = 0;
>>          }
>> }
>>
>> It is working but only one time, when I'm trying to send again (second loop of while) it's stooping on readln() but not sending input data.
>>
>> What am i missing here?
>>
>> Thanks in advance for any help.
>
> Where is the other side of this client? There must be a TCP Server to listen connections, and create a second TCPSocket for communication. There is only one TCPSocket in your code. A lot of things are missing there. I would suggest you to check "C TCPSocket example" in your favourite search engine.

Sorry i forgot to paste server side. After your post i look on that side of my simple socket program and i find out the problem. This is example from other forum topic:

#!/usr/bin/rdmd

import std.stdio;
import std.socket;
import std.algorithm;
import std.conv;

void main() {
    Socket server = new TcpSocket();
    server.setOption(SocketOptionLevel.SOCKET, SocketOption.REUSEADDR, true);
    server.bind(new InternetAddress(8080));
    server.listen(1);


	
    while(true) {

        Socket client = server.accept();


        char[1024] buffer = 0;
        auto received = client.receive(buffer);

        writefln("The client said:\n%s", buffer[0.. received]);

        enum header =
            "HTTP/1.0 200 OK\nContent-Type: text/html; charset=utf-8\n\n";

        string response = header ~ "Hello World!\n";
        client.send(response);
	
        client.shutdown(SocketShutdown.BOTH);
        client.close();


   }


}

Lie we see after each data recive server is closing connection. I rewrite it to something like it:

#!/usr/bin/rdmd

import std.stdio;
import std.socket;
import std.algorithm;
import std.conv;

void main() {
    Socket server = new TcpSocket();
    server.setOption(SocketOptionLevel.SOCKET, SocketOption.REUSEADDR, true);
    server.bind(new InternetAddress(8080));
    server.listen(1);


	Socket client = server.accept();

    while(true) {


        char[1024] buffer = 0;
        auto received = client.receive(buffer);

        writefln("The client said:\n%s", buffer[0.. received]);

        enum header =
            "HTTP/1.0 200 OK\nContent-Type: text/html; charset=utf-8\n\n";

        string response = header ~ "Hello World!\n";
        client.send(response);
	

	auto command = to!string(buffer[0.. received]);
	if(command == "exit")
	{
		
		break;
	}
   }

    client.shutdown(SocketShutdown.BOTH);
    client.close();

}

Now everything is working like i needed.