summaryrefslogtreecommitdiffstats
path: root/bitbake/lib/bb/server/xmlrpcserver.py
blob: 875b1282e5bd9c7779f26ce2116625c6b419b2ff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
#
# BitBake XMLRPC Server Interface
#
# Copyright (C) 2006 - 2007  Michael 'Mickey' Lauer
# Copyright (C) 2006 - 2008  Richard Purdie
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

import os
import sys

import hashlib
import time
import inspect
from xmlrpc.server import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler

import bb

# This request handler checks if the request has a "Bitbake-token" header
# field (this comes from the client side) and compares it with its internal
# "Bitbake-token" field (this comes from the server). If the two are not
# equal, it is assumed that a client is trying to connect to the server
# while another client is connected to the server. In this case, a 503 error
# ("service unavailable") is returned to the client.
class BitBakeXMLRPCRequestHandler(SimpleXMLRPCRequestHandler):
    def __init__(self, request, client_address, server):
        self.server = server
        SimpleXMLRPCRequestHandler.__init__(self, request, client_address, server)

    def do_POST(self):
        try:
            remote_token = self.headers["Bitbake-token"]
        except:
            remote_token = None
        if 0 and remote_token != self.server.connection_token and remote_token != "observer":
            self.report_503()
        else:
            if remote_token == "observer":
                self.server.readonly = True
            else:
                self.server.readonly = False
            SimpleXMLRPCRequestHandler.do_POST(self)

    def report_503(self):
        self.send_response(503)
        response = 'No more client allowed'
        self.send_header("Content-type", "text/plain")
        self.send_header("Content-length", str(len(response)))
        self.end_headers()
        self.wfile.write(bytes(response, 'utf-8'))

class BitBakeXMLRPCServer(SimpleXMLRPCServer):
    # remove this when you're done with debugging
    # allow_reuse_address = True

    def __init__(self, interface, cooker, parent):
        # Use auto port configuration
        if (interface[1] == -1):
            interface = (interface[0], 0)
        SimpleXMLRPCServer.__init__(self, interface,
                                    requestHandler=BitBakeXMLRPCRequestHandler,
                                    logRequests=False, allow_none=True)
        self.host, self.port = self.socket.getsockname()
        self.interface = interface

        self.connection_token = None
        self.commands = BitBakeXMLRPCServerCommands(self)
        self.register_functions(self.commands, "")

        self.cooker = cooker
        self.parent = parent


    def register_functions(self, context, prefix):
        """
        Convenience method for registering all functions in the scope
        of this class that start with a common prefix
        """
        methodlist = inspect.getmembers(context, inspect.ismethod)
        for name, method in methodlist:
            if name.startswith(prefix):
                self.register_function(method, name[len(prefix):])

    def get_timeout(self, delay):
        socktimeout = self.socket.gettimeout() or delay
        return min(socktimeout, delay)

    def handle_requests(self):
        self._handle_request_noblock()

class BitBakeXMLRPCServerCommands():

    def __init__(self, server):
        self.server = server
        self.has_client = False

    def registerEventHandler(self, host, port):
        """
        Register a remote UI Event Handler
        """
        s, t = bb.server.xmlrpcclient._create_server(host, port)

        # we don't allow connections if the cooker is running
        if (self.server.cooker.state in [bb.cooker.state.parsing, bb.cooker.state.running]):
            return None, "Cooker is busy: %s" % bb.cooker.state.get_name(self.server.cooker.state)

        self.event_handle = bb.event.register_UIHhandler(s, True)
        return self.event_handle, 'OK'

    def unregisterEventHandler(self, handlerNum):
        """
        Unregister a remote UI Event Handler
        """
        ret = bb.event.unregister_UIHhandler(handlerNum, True)
        self.event_handle = None
        return ret

    def runCommand(self, command):
        """
        Run a cooker command on the server
        """
        return self.server.cooker.command.runCommand(command, self.server.readonly)

    def getEventHandle(self):
        return self.event_handle

    def terminateServer(self):
        """
        Trigger the server to quit
        """
        self.server.parent.quit = True
        print("XMLRPC Server triggering exit")
        return

    def addClient(self):
        if self.server.parent.haveui:
            return None
        token = hashlib.md5(str(time.time()).encode("utf-8")).hexdigest()
        self.server.connection_token = token
        self.server.parent.haveui = True
        return token

    def removeClient(self):
        if self.server.parent.haveui:
            self.server.connection_token = None
            self.server.parent.haveui = False