annotate libervia/cli/cmd_pipe.py @ 4125:bb74f7dc3b10

frontend (quick app): allow to specify an async bridge: Async Bridge can now be specified and used with `a_bridge` in addition to the legacy one. The legacy one will eventually be removed. rel 424
author Goffi <goffi@goffi.org>
date Tue, 03 Oct 2023 16:24:13 +0200
parents 47401850dec6
children 0d7bb4df2343
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rev   line source
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1 #!/usr/bin/env python3
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2
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3
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4 # Libervia CLI
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5 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20 import asyncio
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21 import errno
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22 from functools import partial
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23 import socket
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24 import sys
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25
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26 from libervia.backend.core.i18n import _
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27 from libervia.backend.tools.common import data_format
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28 from libervia.cli import base
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29 from libervia.cli import xmlui_manager
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30 from libervia.cli.constants import Const as C
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31 from libervia.frontends.tools import jid
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32
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33 __commands__ = ["Pipe"]
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34
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35 START_PORT = 9999
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36
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37
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38 class PipeOut(base.CommandBase):
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39 def __init__(self, host):
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40 super(PipeOut, self).__init__(host, "out", help=_("send a pipe a stream"))
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41
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42 def add_parser_options(self):
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43 self.parser.add_argument(
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44 "jid", help=_("the destination jid")
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45 )
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46
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47 async def start(self):
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48 """ Create named pipe, and send stdin to it """
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49 try:
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50 port = await self.host.bridge.stream_out(
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51 await self.host.get_full_jid(self.args.jid),
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52 self.profile,
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53 )
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54 except Exception as e:
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55 self.disp(f"can't start stream: {e}", error=True)
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56 self.host.quit(C.EXIT_BRIDGE_ERRBACK)
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57 else:
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58 # FIXME: we use temporarily blocking code here, as it simplify
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59 # asyncio port: "loop.connect_read_pipe(lambda: reader_protocol,
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60 # sys.stdin.buffer)" doesn't work properly when a file is piped in
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61 # (we get a "ValueError: Pipe transport is for pipes/sockets only.")
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62 # while it's working well for simple text sending.
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63
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64 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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65 s.connect(("127.0.0.1", int(port)))
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66
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67 while True:
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68 buf = sys.stdin.buffer.read(4096)
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69 if not buf:
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70 break
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71 try:
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72 s.sendall(buf)
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73 except socket.error as e:
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74 if e.errno == errno.EPIPE:
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75 sys.stderr.write(f"e\n")
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76 self.host.quit(1)
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77 else:
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78 raise e
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79 self.host.quit()
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80
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81
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82 async def handle_stream_in(reader, writer, host):
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83 """Write all received data to stdout"""
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84 while True:
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85 data = await reader.read(4096)
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86 if not data:
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87 break
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88 sys.stdout.buffer.write(data)
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89 try:
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90 sys.stdout.flush()
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91 except IOError as e:
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92 sys.stderr.write(f"{e}\n")
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93 break
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94 host.quit_from_signal()
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95
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96
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97 class PipeIn(base.CommandAnswering):
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98 def __init__(self, host):
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99 super(PipeIn, self).__init__(host, "in", help=_("receive a pipe stream"))
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100 self.action_callbacks = {"STREAM": self.on_stream_action}
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101
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102 def add_parser_options(self):
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103 self.parser.add_argument(
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104 "jids",
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105 nargs="*",
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106 help=_('Jids accepted (none means "accept everything")'),
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107 )
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108
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109 def get_xmlui_id(self, action_data):
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110 try:
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111 xml_ui = action_data["xmlui"]
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112 except KeyError:
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113 self.disp(_("Action has no XMLUI"), 1)
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114 else:
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115 ui = xmlui_manager.create(self.host, xml_ui)
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116 if not ui.submit_id:
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117 self.disp(_("Invalid XMLUI received"), error=True)
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118 self.quit_from_signal(C.EXIT_INTERNAL_ERROR)
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119 return ui.submit_id
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120
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121 async def on_stream_action(self, action_data, action_id, security_limit, profile):
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122 xmlui_id = self.get_xmlui_id(action_data)
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123 if xmlui_id is None:
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124 self.host.quit_from_signal(C.EXIT_ERROR)
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125 try:
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126 from_jid = jid.JID(action_data["from_jid"])
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127 except KeyError:
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128 self.disp(_("Ignoring action without from_jid data"), error=True)
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129 return
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130
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131 if not self.bare_jids or from_jid.bare in self.bare_jids:
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132 host, port = "localhost", START_PORT
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133 while True:
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134 try:
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135 server = await asyncio.start_server(
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136 partial(handle_stream_in, host=self.host), host, port)
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137 except socket.error as e:
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138 if e.errno == errno.EADDRINUSE:
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139 port += 1
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140 else:
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141 raise e
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142 else:
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143 break
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144 xmlui_data = {"answer": C.BOOL_TRUE, "port": str(port)}
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145 await self.host.bridge.action_launch(
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146 xmlui_id, data_format.serialise(xmlui_data), profile_key=profile
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147 )
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148 async with server:
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149 await server.serve_forever()
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150 self.host.quit_from_signal()
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151
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152 async def start(self):
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153 self.bare_jids = [jid.JID(jid_).bare for jid_ in self.args.jids]
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154 await self.start_answering()
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155
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156
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157 class Pipe(base.CommandBase):
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158 subcommands = (PipeOut, PipeIn)
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159
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160 def __init__(self, host):
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161 super(Pipe, self).__init__(
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162 host, "pipe", use_profile=False, help=_("stream piping through XMPP")
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163 )