Mercurial > vim

annotate src/testdir/test_channel.py @ 7965:646d5148fee2 v7.4.1278

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commit https://github.com/vim/vim/commit/55fab439a6f3bba6dbe780ac034b84d5822a1a96 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 7 16:53:13 2016 +0100 patch 7.4.1278 Problem: When jsonencode() fails it still returns something. Solution: Return an empty string on failure.
author Christian Brabandt <cb@256bit.org>
date Sun, 07 Feb 2016 17:00:05 +0100
parents dcc0bd6b1574
children 0756eab66b71
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1 #!/usr/bin/python
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2 #
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3 # Server that will accept connections from a Vim channel.
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4 # Run this server and then in Vim you can open the channel:
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5 # :let handle = ch_open('localhost:8765', 'json')
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6 #
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7 # Then Vim can send requests to the server:
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8 # :let response = ch_sendexpr(handle, 'hello!')
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9 #
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10 # See ":help channel-demo" in Vim.
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11 #
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12 # This requires Python 2.6 or later.
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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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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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27 class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler):
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29 def handle(self):
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30 print("=== socket opened ===")
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31 while True:
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32 try:
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33 received = self.request.recv(4096).decode('utf-8')
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34 except socket.error:
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35 print("=== socket error ===")
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36 break
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37 except IOError:
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38 print("=== socket closed ===")
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39 break
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40 if received == '':
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41 print("=== socket closed ===")
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42 break
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43 print("received: {}".format(received))
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45 # We may receive two messages at once. Take the part up to the
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46 # matching "]" (recognized by finding "][").
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47 todo = received
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48 while todo != '':
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49 splitidx = todo.find('][')
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50 if splitidx < 0:
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51 used = todo
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52 todo = ''
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53 else:
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54 used = todo[:splitidx + 1]
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55 todo = todo[splitidx + 1:]
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56 if used != received:
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57 print("using: {}".format(used))
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59 try:
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60 decoded = json.loads(used)
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61 except ValueError:
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62 print("json decoding failed")
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63 decoded = [-1, '']
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64
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65 # Send a response if the sequence number is positive.
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66 if decoded[0] >= 0:
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67 if decoded[1] == 'hello!':
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68 # simply send back a string
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69 response = "got it"
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70 elif decoded[1] == 'make change':
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71 # Send two ex commands at the same time, before
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72 # replying to the request.
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73 cmd = '["ex","call append(\\"$\\",\\"added1\\")"]'
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74 cmd += '["ex","call append(\\"$\\",\\"added2\\")"]'
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75 print("sending: {}".format(cmd))
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76 self.request.sendall(cmd.encode('utf-8'))
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77 response = "ok"
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78 elif decoded[1] == 'do normal':
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79 # Send a normal command.
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80 cmd = '["normal","G$s more\u001b"]'
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81 print("sending: {}".format(cmd))
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82 self.request.sendall(cmd.encode('utf-8'))
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83 response = "ok"
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84 elif decoded[1] == 'eval-works':
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85 # Send an eval request. We ignore the response.
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86 cmd = '["eval","\\"foo\\" . 123", -1]'
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87 print("sending: {}".format(cmd))
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88 self.request.sendall(cmd.encode('utf-8'))
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89 response = "ok"
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90 elif decoded[1] == 'eval-fails':
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91 # Send an eval request that will fail.
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92 cmd = '["eval","xxx", -2]'
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93 print("sending: {}".format(cmd))
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94 self.request.sendall(cmd.encode('utf-8'))
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95 response = "ok"
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96 elif decoded[1] == 'eval-error':
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97 # Send an eval request that works but the result can't
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98 # be encoded.
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99 cmd = '["eval","function(\\"tr\\")", -3]'
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100 print("sending: {}".format(cmd))
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101 self.request.sendall(cmd.encode('utf-8'))
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102 response = "ok"
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103 elif decoded[1] == 'eval-bad':
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104 # Send an eval request missing the third argument.
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105 cmd = '["eval","xxx"]'
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106 print("sending: {}".format(cmd))
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107 self.request.sendall(cmd.encode('utf-8'))
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108 response = "ok"
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109 elif decoded[1] == 'an expr':
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110 # Send an expr request.
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111 cmd = '["expr","setline(\\"$\\", [\\"one\\",\\"two\\",\\"three\\"])"]'
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112 print("sending: {}".format(cmd))
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113 self.request.sendall(cmd.encode('utf-8'))
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114 response = "ok"
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115 elif decoded[1] == 'redraw':
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116 cmd = '["redraw",""]'
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117 print("sending: {}".format(cmd))
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118 self.request.sendall(cmd.encode('utf-8'))
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119 response = "ok"
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120 elif decoded[1] == 'redraw!':
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121 cmd = '["redraw","force"]'
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122 print("sending: {}".format(cmd))
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123 self.request.sendall(cmd.encode('utf-8'))
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124 response = "ok"
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125 elif decoded[1] == 'empty-request':
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126 cmd = '[]'
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127 print("sending: {}".format(cmd))
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128 self.request.sendall(cmd.encode('utf-8'))
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129 response = "ok"
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130 elif decoded[1] == 'eval-result':
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131 # Send back the last received eval result.
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132 response = last_eval
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133 elif decoded[1] == '!quit!':
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134 # we're done
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135 self.server.shutdown()
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136 break
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137 elif decoded[1] == '!crash!':
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138 # Crash!
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139 42 / 0
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140 else:
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141 response = "what?"
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142
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143 encoded = json.dumps([decoded[0], response])
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144 print("sending: {}".format(encoded))
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145 self.request.sendall(encoded.encode('utf-8'))
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146
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147 # Negative numbers are used for "eval" responses.
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148 elif decoded[0] < 0:
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149 last_eval = decoded
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150
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151 class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
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152 pass
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153
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154 if __name__ == "__main__":
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155 HOST, PORT = "localhost", 0
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156
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157 server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler)
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158 ip, port = server.server_address
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159
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160 # Start a thread with the server. That thread will then start a new thread
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161 # for each connection.
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162 server_thread = threading.Thread(target=server.serve_forever)
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163 server_thread.start()
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164
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165 # Write the port number in Xportnr, so that the test knows it.
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166 f = open("Xportnr", "w")
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167 f.write("{}".format(port))
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168 f.close()
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169
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170 print("Listening on port {}".format(port))
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171
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172 # Main thread terminates, but the server continues running
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173 # until server.shutdown() is called.