nimforum mirror - Nimsuggest connection over sockets refused

LilKeet (orginal) [2023-12-03T14:59:27+01:00] view original

Hey, all. I'm trying to interface with nimsuggest according to the the Nim IDE Integration Guide and have run into some issues with sockets. I'm trying to connect to nimsuggest over port 6000 but my connection keeps being refused. Any help would be greatly appreciated!

import std / [osproc, os, net, strformat, with, paths, exitprocs]

const
  EndToken = "\e"
  PauseToken = "\e\e"
  ClearToken = "\e\e\e"
  Port = Port 6000

var
  commands: Channel[string]
  results: Channel[string]
commands.open()
results.open()

proc processTask(task: string) =
  let socket = newSocket()
  for i in 0..9:
    socket.connect("localhost", Port) # Connection refused [OSError]
    socket.send(&"{task}\c\l")
    discard "do stuff here..."
    socket.close()
    results.send(EndToken)

proc suggestThread() {.thread.} =
  while true:
    let cmd = commands.recv()
    case cmd
    of EndToken: break
    of PauseToken: os.sleep(300)
    else: processTask(cmd)

var prevProject: string
var nimsuggest: Process

proc shutdown() {.noconv.} =
  if nimsuggest.isNil: return
  nimsuggest.terminate()
  nimsuggest.close()
  nimsuggest = nil

proc startup(project: string; debug: bool): bool =
  if nimsuggest.isNil or project != prevProject or not nimsuggest.running:
    
    let pathToExe = Path findExe("nimsuggest")
    assert pathToExe.string.len != 0
    
    prevProject = project
    shutdown()
    let nimPath = findExe("nim").splitFile.dir.parentDir
    var args = if debug: @["--debug"] else: @[]
    with args:
      add fmt"--port:{Port}"
      add "--v2"
      add project
      add "--log"
      add "--debug"
    
    nimsuggest = startProcess(pathToExe.string, nimPath, args,
                              options = {poStdErrToStdOut, poInteractive,
                                                 poDaemon})
    # give it some time to startup:
    commands.send(PauseToken)
  return nimsuggest != nil

var processing: bool

proc requestSuggestion(filename, cmd: string; col, currentLine: int) =
  commands.send &"{cmd} \"{filename}\":{currentLine+1}:{col}\c\l"
  processing = true

var backgroundThread: Thread[void]
createThread[void](backgroundThread, suggestThread)


proc main() =
  assert startup("myTestProject.nim", true)
  addExitProc shutdown
  
  while true:
    requestSuggestion("myTestProject.nim", "con", 5, 10)
    os.sleep(50)


main()

on ubuntu:

../.choosenim/toolchains/nim-2.0.0/lib/system.nim(35) suggestThread
../Documents/nimsuggestTest/nimsuggestTest.nim(19) processTask
../.choosenim/toolchains/nim-2.0.0/lib/pure/net.nim(2068) connect
../.choosenim/toolchains/nim-2.0.0/lib/std/oserrors.nim(92) raiseOSError
Error: unhandled exception: Connection refused [OSError]

on windows:

../.choosenim/toolchains/nim-2.0.0/lib/system.nim(35) suggestThread
../Documents/nimsuggestTest/nimsuggestTest.nim(19) processTask
../.choosenim/toolchains/nim-2.0.0/lib/pure/net.nim(2068) connect
../.choosenim/toolchains/nim-2.0.0/lib/std/oserrors.nim(92) raiseOSError
Error: unhandled exception: No connection could be made because the target machine actively refused it. [OSError]

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10727 :: Nimsuggest connection over sockets refused