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annotate runtime/tools/demoserver.py @ 7874:2313f1a94153 v7.4.1234

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commit https://github.com/vim/vim/commit/488a130ea261f02317adc2c2ca93cc6e68cf2c23 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Feb 1 22:01:10 2016 +0100 patch 7.4.1234 Problem: Demo server only runs with Python 2. Solution: Make it run with Python 3 as well. (Ken Takata)
author Christian Brabandt <cb@256bit.org>
date Mon, 01 Feb 2016 22:15:04 +0100
parents 192ae655ac91
children bff95e0d8885
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1 #!/usr/bin/python
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2 # Server that will accept connections from a Vim channel.
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3 # Run this server and then in Vim you can open the channel:
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4 # :let handle = connect('localhost:8765', 'json')
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5 #
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6 # Then Vim can send requests to the server:
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7 # :let response = sendexpr(handle, 'hello!')
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8 #
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9 # And you can control Vim by typing a JSON message here, e.g.:
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10 # ["ex","echo 'hi there'"]
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11 #
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12 # See ":help channel-demo" in Vim.
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13
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14 from __future__ import print_function
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15 import json
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16 import socket
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17 import sys
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18 import threading
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19
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20 try:
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21 # Python 3
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22 import socketserver
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23 except ImportError:
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24 # Python 2
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25 import SocketServer as socketserver
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26
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27 thesocket = None
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28
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29 class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler):
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31 def handle(self):
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32 print("=== socket opened ===")
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33 global thesocket
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34 thesocket = self.request
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35 while True:
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36 try:
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37 data = self.request.recv(4096).decode('utf-8')
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38 except socket.error:
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39 print("=== socket error ===")
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40 break
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41 except IOError:
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42 print("=== socket closed ===")
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43 break
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44 if data == '':
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45 print("=== socket closed ===")
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46 break
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47 print("received: {}".format(data))
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48 try:
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49 decoded = json.loads(data)
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50 except ValueError:
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51 print("json decoding failed")
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52 decoded = [-1, '']
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53
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54 # Send a response if the sequence number is positive.
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55 # Negative numbers are used for "eval" responses.
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56 if decoded[0] >= 0:
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57 if decoded[1] == 'hello!':
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58 response = "got it"
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59 else:
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60 response = "what?"
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61 encoded = json.dumps([decoded[0], response])
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62 print("sending {}".format(encoded))
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63 self.request.sendall(encoded.encode('utf-8'))
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64 thesocket = None
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65
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66 class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
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67 pass
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69 if __name__ == "__main__":
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70 HOST, PORT = "localhost", 8765
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72 server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler)
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73 ip, port = server.server_address
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75 # Start a thread with the server -- that thread will then start one
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76 # more thread for each request
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77 server_thread = threading.Thread(target=server.serve_forever)
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79 # Exit the server thread when the main thread terminates
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80 server_thread.daemon = True
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81 server_thread.start()
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82 print("Server loop running in thread: ", server_thread.name)
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83
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84 print("Listening on port {}".format(PORT))
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85 while True:
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86 typed = sys.stdin.readline()
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87 if "quit" in typed:
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88 print("Goodbye!")
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89 break
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90 if thesocket is None:
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91 print("No socket yet")
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92 else:
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93 print("sending {}".format(typed))
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94 thesocket.sendall(typed.encode('utf-8'))
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96 server.shutdown()
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97 server.server_close()