Client socket sending data only one time.

[holo via Digitalmars-d-learn]

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.