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#!/usr/bin/env python
#
# Server that will accept connections from a Vim channel.
# Used by test_channel.vim to test LSP functionality.
#
# This requires Python 2.6 or later.
from __future__ import print_function
import json
import socket
import sys
import time
import threading
try:
# Python 3
import socketserver
except ImportError:
# Python 2
import SocketServer as socketserver
class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler):
def setup(self):
self.request.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
def debuglog(self, msg):
if self.debug:
with open("Xlspserver.log", "a") as myfile:
myfile.write(msg)
def send_lsp_msg(self, msgid, resp_dict):
v = {'jsonrpc': '2.0', 'result': resp_dict}
if msgid != -1:
v['id'] = msgid
s = json.dumps(v)
resp = "Content-Length: " + str(len(s)) + "\r\n"
resp += "Content-Type: application/vim-jsonrpc; charset=utf-8\r\n"
resp += "\r\n"
resp += s
if self.debug:
self.debuglog("SEND: ({0} bytes) '{1}'\n".format(len(resp), resp))
self.request.sendall(resp.encode('utf-8'))
def send_wrong_payload(self):
v = 'wrong-payload'
s = json.dumps(v)
resp = "Content-Length: " + str(len(s)) + "\r\n"
resp += "Content-Type: application/vim-jsonrpc; charset=utf-8\r\n"
resp += "\r\n"
resp += s
self.request.sendall(resp.encode('utf-8'))
def send_empty_header(self, msgid, resp_dict):
v = {'jsonrpc': '2.0', 'id': msgid, 'result': resp_dict}
s = json.dumps(v)
resp = "\r\n"
resp += s
self.request.sendall(resp.encode('utf-8'))
def send_empty_payload(self):
resp = "Content-Length: 0\r\n"
resp += "Content-Type: application/vim-jsonrpc; charset=utf-8\r\n"
resp += "\r\n"
self.request.sendall(resp.encode('utf-8'))
def send_extra_hdr_fields(self, msgid, resp_dict):
# test for sending extra fields in the http header
v = {'jsonrpc': '2.0', 'id': msgid, 'result': resp_dict}
s = json.dumps(v)
resp = "Host: abc.vim.org\r\n"
resp += "User-Agent: Python\r\n"
resp += "Accept-Language: en-US,en\r\n"
resp += "Content-Type: application/vim-jsonrpc; charset=utf-8\r\n"
resp += "Content-Length: " + str(len(s)) + "\r\n"
resp += "\r\n"
resp += s
self.request.sendall(resp.encode('utf-8'))
def send_delayed_payload(self, msgid, resp_dict):
# test for sending the hdr first and then after some delay, send the
# payload
v = {'jsonrpc': '2.0', 'id': msgid, 'result': resp_dict}
s = json.dumps(v)
resp = "Content-Length: " + str(len(s)) + "\r\n"
resp += "\r\n"
self.request.sendall(resp.encode('utf-8'))
time.sleep(0.05)
resp = s
self.request.sendall(resp.encode('utf-8'))
def send_hdr_without_len(self, msgid, resp_dict):
# test for sending the http header without length
v = {'jsonrpc': '2.0', 'id': msgid, 'result': resp_dict}
s = json.dumps(v)
resp = "Content-Type: application/vim-jsonrpc; charset=utf-8\r\n"
resp += "\r\n"
resp += s
self.request.sendall(resp.encode('utf-8'))
def send_hdr_with_wrong_len(self, msgid, resp_dict):
# test for sending the http header with wrong length
v = {'jsonrpc': '2.0', 'id': msgid, 'result': resp_dict}
s = json.dumps(v)
resp = "Content-Length: 1000\r\n"
resp += "\r\n"
resp += s
self.request.sendall(resp.encode('utf-8'))
def send_hdr_with_negative_len(self, msgid, resp_dict):
# test for sending the http header with negative length
v = {'jsonrpc': '2.0', 'id': msgid, 'result': resp_dict}
s = json.dumps(v)
resp = "Content-Length: -1\r\n"
resp += "\r\n"
resp += s
self.request.sendall(resp.encode('utf-8'))
def do_ping(self, payload):
time.sleep(0.2)
self.send_lsp_msg(payload['id'], 'alive')
def do_echo(self, payload):
self.send_lsp_msg(-1, payload)
def do_simple_rpc(self, payload):
# test for a simple RPC request
self.send_lsp_msg(payload['id'], 'simple-rpc')
def do_rpc_with_notif(self, payload):
# test for sending a notification before replying to a request message
self.send_lsp_msg(-1, 'rpc-with-notif-notif')
# sleep for some time to make sure the notification is delivered
time.sleep(0.2)
self.send_lsp_msg(payload['id'], 'rpc-with-notif-resp')
def do_wrong_payload(self, payload):
# test for sending a non dict payload
self.send_wrong_payload()
time.sleep(0.2)
self.send_lsp_msg(-1, 'wrong-payload')
def do_large_payload(self, payload):
# test for sending a large (> 64K) payload
self.send_lsp_msg(payload['id'], payload)
def do_rpc_resp_incorrect_id(self, payload):
self.send_lsp_msg(-1, 'rpc-resp-incorrect-id-1')
self.send_lsp_msg(-1, 'rpc-resp-incorrect-id-2')
self.send_lsp_msg(1, 'rpc-resp-incorrect-id-3')
time.sleep(0.2)
self.send_lsp_msg(payload['id'], 'rpc-resp-incorrect-id-4')
def do_simple_notif(self, payload):
# notification message test
self.send_lsp_msg(-1, 'simple-notif')
def do_multi_notif(self, payload):
# send multiple notifications
self.send_lsp_msg(-1, 'multi-notif1')
self.send_lsp_msg(-1, 'multi-notif2')
def do_msg_with_id(self, payload):
self.send_lsp_msg(payload['id'], 'msg-with-id')
def do_msg_specific_cb(self, payload):
self.send_lsp_msg(payload['id'], 'msg-specific-cb')
def do_server_req(self, payload):
self.send_lsp_msg(201, {'method': 'checkhealth', 'params': {'a': 20}})
def do_extra_hdr_fields(self, payload):
self.send_extra_hdr_fields(payload['id'], 'extra-hdr-fields')
def do_delayad_payload(self, payload):
self.send_delayed_payload(payload['id'], 'delayed-payload')
def do_hdr_without_len(self, payload):
self.send_hdr_without_len(payload['id'], 'hdr-without-len')
def do_hdr_with_wrong_len(self, payload):
self.send_hdr_with_wrong_len(payload['id'], 'hdr-with-wrong-len')
def do_hdr_with_negative_len(self, payload):
self.send_hdr_with_negative_len(payload['id'], 'hdr-with-negative-len')
def do_empty_header(self, payload):
self.send_empty_header(payload['id'], 'empty-header')
def do_empty_payload(self, payload):
self.send_empty_payload()
def process_msg(self, msg):
try:
decoded = json.loads(msg)
if 'method' in decoded:
test_map = {
'ping': self.do_ping,
'echo': self.do_echo,
'simple-rpc': self.do_simple_rpc,
'rpc-with-notif': self.do_rpc_with_notif,
'wrong-payload': self.do_wrong_payload,
'large-payload': self.do_large_payload,
'rpc-resp-incorrect-id': self.do_rpc_resp_incorrect_id,
'simple-notif': self.do_simple_notif,
'multi-notif': self.do_multi_notif,
'msg-with-id': self.do_msg_with_id,
'msg-specific-cb': self.do_msg_specific_cb,
'server-req': self.do_server_req,
'extra-hdr-fields': self.do_extra_hdr_fields,
'delayed-payload': self.do_delayad_payload,
'hdr-without-len': self.do_hdr_without_len,
'hdr-with-wrong-len': self.do_hdr_with_wrong_len,
'hdr-with-negative-len': self.do_hdr_with_negative_len,
'empty-header': self.do_empty_header,
'empty-payload': self.do_empty_payload
}
if decoded['method'] in test_map:
test_map[decoded['method']](decoded)
else:
self.debuglog("Error: Unsupported method - " + decoded['method'] + "\n")
else:
self.debuglog("Error: 'method' field is not found\n")
except ValueError:
self.debuglog("Error: json decoding failed\n")
def process_msgs(self, msgbuf):
while True:
sidx = msgbuf.find('Content-Length: ')
if sidx == -1:
# partial message received
return msgbuf
sidx += 16
eidx = msgbuf.find('\r\n')
if eidx == -1:
# partial message received
return msgbuf
msglen = int(msgbuf[sidx:eidx])
hdrend = msgbuf.find('\r\n\r\n')
if hdrend == -1:
# partial message received
return msgbuf
if msglen > len(msgbuf[hdrend + 4:]):
if self.debug:
self.debuglog("Partial message ({0} bytes)\n".format(len(msgbuf)))
# partial message received
return msgbuf
if self.debug:
self.debuglog("Complete message ({0} bytes) received\n".format(msglen))
# Remove the header
msgbuf = msgbuf[hdrend + 4:]
payload = msgbuf[:msglen]
self.process_msg(payload)
# Remove the processed message
msgbuf = msgbuf[msglen:]
def handle(self):
self.debug = False
self.debuglog("=== socket opened ===\n")
msgbuf = ''
while True:
try:
received = self.request.recv(4096).decode('utf-8')
except socket.error:
self.
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