www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.learn - How to use listener.d example?

reply Marcin <p_ir o2.pl> writes:
https://github.com/dlang/dmd/blob/master/samples/listener.d

Can some one add more comment to that example?

I need to make code that connects to local application, very 
similar to this.

Assumptions:
1. Create an application that listens to arguments.
2. Create an application that will send arguments to the 
application mentioned above.
3. The application will return the sine (argument) to the client.
4. All communication must be realized via console.

input:
1

1,2,3

4 5

44

Output:
"a =" 1 "sin (a) =" 0.84147

"a =" 1 "sin (a) =" 0.84147
"a =" 2 "sin (a) =" 0.9092
"a =" 3 "sin (a) =" 0.14112

"a =" 4 "sin (a) =" -0.756
"a =" 5 "sin (a) =" 0.9589

"a =" 44 "sin (a) =" 0.0177

Can some one help me write a server and client app?
I will use it to create more complicated application.
Aug 31 2018
next sibling parent Neia Neutuladh <neia ikeran.org> writes:
On Friday, 31 August 2018 at 07:38:54 UTC, Marcin wrote:

 https://github.com/dlang/dmd/blob/master/samples/listener.d

 Can some one add more comment to that example?

 I need to make code that connects to local application, very 
 similar to this.

 Assumptions:
 1. Create an application that listens to arguments.
 2. Create an application that will send arguments to the 
 application mentioned above.
 3. The application will return the sine (argument) to the 
 client.
 4. All communication must be realized via console.


Another, more structured way to do this is with an RPC framework 
like Apache Thrift. With Thrift, you'd write an interface 
description:

---
namespace d math.api
service Sine
{
   double sine(1: double value);
}
---

In your application, you'd have something like:

---
import vibe.d;
import vibethrift;
import math.api.Sine;

class SineImpl : Sine
{
   double sine(double value)
   {
     static import std.math;
     return std.math.sin(value);
   }
}
void main()
{
   serve!Sine(new SineImpl, "0.0.0.0", 5555);
   return runApplication();
}
---

Then you use the corresponding Thrift client to make requests 
against it.

You could also do this with Vibe and REST:

---
import vibe.d;
class Sine
{
    path("/sine")
   string getSine(double value)
   {
     static import std.math;
     import std.conv : to;
     return std.math.sin(value).to!string;
   }
}
void main()
{
   auto settings = new HTTPServerSettings;
   settings.port = 5555;
   auto router = new URLRouter;
   router.registerWebInterface(new Sine);
   listenHTTP(settings, router);
   runApplication();
}
---

And then you can point your browser at 
http://localhost:5555/sine?value=1.5 and get back 0.997495. You 
can similarly use std.net.curl to make the request.

But let's say you want to do everything yourself.

That script is the server. Line 55 is the thing that handles the 
input. You need to put your code there.

The remote application might send input in multiple packets. That 
means you have to collect input somewhere and figure out where 
the end is. You can either pass a length as the first part 
(usually a 4-byte value in network byte order), or require a 
special character to terminate the commend (I recommend the ASCII 
Record Separator character, U+001E, or the like), or know enough 
about your input to figure out where it ends anyway.

Once you get the end of your input, you send it off somewhere to 
parse and process. It's up to you how you want to send numbers 
across. When you're done, you need to convert the output numbers 
back to bytes somehow and send them back with socket.send(), and 
then you close the connection.

Once you've got that working, you need to write a client that 
does pretty much the same thing, but Socket.connect instead of 
the bind/listen/accept business, and you can just use Socket.read 
for the response rather than dealing with a SocketSet.
Aug 31 2018
prev sibling parent reply Marcin <p_ir o2.pl> writes:
On Friday, 31 August 2018 at 07:38:54 UTC, Marcin wrote:

 https://github.com/dlang/dmd/blob/master/samples/listener.d



Im using Notepad++ as my IDE cuz i dont have administrator 
privileges on PC
To import modules i use -I option
cmd /k  cd C:\D\dtwo\windows\bin\ & C:\D\dtwo\windows\bin\dmd.exe 
-I="$(CURRENT_DIRECTORY)" "$(FULL_CURRENT_PATH)" & 
C:\D\dtwo\windows\bin\$(NAME_PART).exe

C:\Users\wjelki\Desktop\d\aplikacja.d(2): Error: module `server` 
is in file 'vibe\http\server.d' which cannot be read
import path[0] = C:\Users\wjelki\Desktop\d\vibe.d\core
import path[1] = .\..\..\src\phobos
import path[2] = .\..\..\src\druntime\import

How to import other modules than Phobos?
Sep 04 2018
parent reply rikki cattermole <rikki cattermole.co.nz> writes:
On 04/09/2018 10:57 PM, Marcin wrote:

 On Friday, 31 August 2018 at 07:38:54 UTC, Marcin wrote:

 https://github.com/dlang/dmd/blob/master/samples/listener.d


 
 
 Im using Notepad++ as my IDE cuz i dont have administrator privileges on PC


Coedit is a good option since it is a simple unzip and ready to go. 
Although less than ugh "normal" but still a good option when nothing 
else decent exists.

https://github.com/BBasile/Coedit


 To import modules i use -I option
 cmd /k  cd C:\D\dtwo\windows\bin\ & C:\D\dtwo\windows\bin\dmd.exe 
 -I="$(CURRENT_DIRECTORY)" "$(FULL_CURRENT_PATH)" & 
 C:\D\dtwo\windows\bin\$(NAME_PART).exe


-I is only for directories and the modules contained must be already 
compiled and ready to be linked in.


 C:\Users\wjelki\Desktop\d\aplikacja.d(2): Error: module `server` is in 
 file 'vibe\http\server.d' which cannot be read
 import path[0] = C:\Users\wjelki\Desktop\d\vibe.d\core
 import path[1] = .\..\..\src\phobos
 import path[2] = .\..\..\src\druntime\import
 
 How to import other modules than Phobos?


For vibe.d use the build manager dub and yes dmd comes with it already.

But the general way to do it straight is:

dmd -of mylib.lib -lib a/filea.d a/fileb.d
dmd -of myprog.exe mylib.lib b/filec.d -I a

Of course that is off the top of my head and I only ever use dub so... 
take that with a grain of salt.
Sep 04 2018
parent reply Marcin <p_ir o2.pl> writes:
""
Am i doing it right?

I've unpacked vibe.d-master to my "C:\D\dtwo\src"
commands in cmd:

cd C:\D\dtwo\windows\bin\
echo "vibe.d-master is a folder"
dmd -lib C:\D\dtwo\src\vibe.d-master\core\vibe\appmain.d 
C:\D\dtwo\src\vibe.d-master\http\vibe\http\server.d


no wai, Ill just paste the vibe.d-master to my code location and 
add more arguments.

dub fetch vibe-d
downloaded something
dub run vibe-d
runs something
dub test vibe-d

vibe-d:redis 0.8.4: building configuration "library"...
vibe-d:web 0.8.4: building configuration "library"...
vibe-d 0.8.4: building configuration "vibe-d-test-vibe-core"...
Linking...
Error: linker exited with status 1
C:\D\dtwo\windows\bin\dmd.exe failed with exit code 1.

still don't work



I love programming... after 37 h of tryin to force run compiler.
Sep 04 2018
parent reply rikki cattermole <rikki cattermole.co.nz> writes:
On 05/09/2018 12:10 AM, Marcin wrote:

 ""
 Am i doing it right?
 
 I've unpacked vibe.d-master to my "C:\D\dtwo\src"
 commands in cmd:
 
 cd C:\D\dtwo\windows\bin\
 echo "vibe.d-master is a folder"
 dmd -lib C:\D\dtwo\src\vibe.d-master\core\vibe\appmain.d 
 C:\D\dtwo\src\vibe.d-master\http\vibe\http\server.d
 
 
 no wai, Ill just paste the vibe.d-master to my code location and add 
 more arguments.
 
 dub fetch vibe-d
 downloaded something
 dub run vibe-d
 runs something
 dub test vibe-d
 
 vibe-d:redis 0.8.4: building configuration "library"...
 vibe-d:web 0.8.4: building configuration "library"...
 vibe-d 0.8.4: building configuration "vibe-d-test-vibe-core"...
 Linking...
 Error: linker exited with status 1
 C:\D\dtwo\windows\bin\dmd.exe failed with exit code 1.
 
 still don't work
 
 
 
 I love programming... after 37 h of tryin to force run compiler.


You didn't need to download or manually fetch vibe-d yourself (it won't 
work this way FYI).
Just make sure dmd (windows/bin directory) is on your PATH variable, and 
you're good to go for the below example.

$ cd c:/projects/test_vibed
$ dub init
json
someprojectname
my description
Marcin
proprietary
Copyright 2018
vibe-d
\n
$ dub run
Sep 04 2018
parent reply Marcin <p_ir o2.pl> writes:
https://drive.google.com/open?id=1hC5SZ3VWX0iQoUO7KN0S-743x6FG9ER5

I give up

Cant compile this vibe-d

Ill get back to phobos
Sep 04 2018
parent reply Marcin <p_ir o2.pl> writes:
https://drive.google.com/open?id=1Qo6BYIZjaoxL_Z0TS9-vAN4ZgbTepkcR

I've reinstalled in other location and rewrite whole example.
I still get optlink error 
http://www.digitalmars.com/ctg/optlink.html
Sep 04 2018
parent reply Marcin <dupek gmail.com> writes:
I get it working in linux environment.

I don't know why vibe-d get linker errors on win10.
Sep 07 2018
parent Marcin <p_ir o2.pl> writes:
On Friday, 7 September 2018 at 17:00:21 UTC, Marcin wrote:

 I get it working in linux environment.

 I don't know why vibe-d get linker errors on win10.


And I get it to work on windos
dub --build=release
Sep 11 2018