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
159
160
161
162
163
164
165
166
|
/**
* This is the Socket.IO Router. It routes the Messages between the
* components of the Server. The components are at the moment: pad and timeslider
*/
/*
* 2011 Peter 'Pita' Martischka (Primary Technology Ltd)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var ERR = require("async-stacktrace");
var log4js = require('log4js');
var messageLogger = log4js.getLogger("message");
var securityManager = require("../db/SecurityManager");
var readOnlyManager = require("../db/ReadOnlyManager");
var remoteAddress = require("../utils/RemoteAddress").remoteAddress;
var settings = require('../utils/Settings');
/**
* Saves all components
* key is the component name
* value is the component module
*/
var components = {};
var socket;
/**
* adds a component
*/
exports.addComponent = function(moduleName, module)
{
//save the component
components[moduleName] = module;
//give the module the socket
module.setSocketIO(socket);
}
/**
* sets the socket.io and adds event functions for routing
*/
exports.setSocketIO = function(_socket) {
//save this socket internaly
socket = _socket;
socket.sockets.on('connection', function(client)
{
// Broken: See http://stackoverflow.com/questions/4647348/send-message-to-specific-client-with-socket-io-and-node-js
// Fixed by having a persistant object, ideally this would actually be in the database layer
// TODO move to database layer
if(settings.trustProxy && client.handshake.headers['x-forwarded-for'] !== undefined){
remoteAddress[client.id] = client.handshake.headers['x-forwarded-for'];
}
else{
remoteAddress[client.id] = client.handshake.address;
}
var clientAuthorized = false;
//wrap the original send function to log the messages
client._send = client.send;
client.send = function(message) {
messageLogger.debug("to " + client.id + ": " + stringifyWithoutPassword(message));
client._send(message);
}
//tell all components about this connect
for(var i in components) {
components[i].handleConnect(client);
}
client.on('message', function(message)
{
if(message.protocolVersion && message.protocolVersion != 2) {
messageLogger.warn("Protocolversion header is not correct:" + stringifyWithoutPassword(message));
return;
}
//client is authorized, everything ok
if(clientAuthorized) {
handleMessage(client, message);
} else { //try to authorize the client
if(message.padId !== undefined && message.sessionID !== undefined && message.token !== undefined && message.password !== undefined) {
var checkAccessCallback = function(err, statusObject) {
ERR(err);
//access was granted, mark the client as authorized and handle the message
if(statusObject.accessStatus == "grant") {
clientAuthorized = true;
handleMessage(client, message);
}
//no access, send the client a message that tell him why
else {
messageLogger.warn("Authentication try failed:" + stringifyWithoutPassword(message));
client.json.send({accessStatus: statusObject.accessStatus});
}
};
if (message.padId.indexOf("r.") === 0) {
readOnlyManager.getPadId(message.padId, function(err, value) {
ERR(err);
securityManager.checkAccess (value, message.sessionID, message.token, message.password, checkAccessCallback);
});
} else {
//this message has everything to try an authorization
securityManager.checkAccess (message.padId, message.sessionID, message.token, message.password, checkAccessCallback);
}
} else { //drop message
messageLogger.warn("Dropped message cause of bad permissions:" + stringifyWithoutPassword(message));
}
}
});
client.on('disconnect', function()
{
//tell all components about this disconnect
for(var i in components)
{
components[i].handleDisconnect(client);
}
});
});
}
//try to handle the message of this client
function handleMessage(client, message)
{
if(message.component && components[message.component]) {
//check if component is registered in the components array
if(components[message.component]) {
messageLogger.debug("from " + client.id + ": " + stringifyWithoutPassword(message));
components[message.component].handleMessage(client, message);
}
} else {
messageLogger.error("Can't route the message:" + stringifyWithoutPassword(message));
}
}
//returns a stringified representation of a message, removes the password
//this ensures there are no passwords in the log
function stringifyWithoutPassword(message)
{
var newMessage = {};
for(var i in message)
{
if(i == "password" && message[i] != null)
newMessage["password"] = "xxx";
else
newMessage[i]=message[i];
}
return JSON.stringify(newMessage);
}
|
