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 |
1
1
1
8
8
21
21
8
8
8
8
7
1
8
1
1
1
8
8
2
2
6
6
1
1
30
1
30
25
30
5
5
3
2
1
3
1
8
8
8
5
3
1 | /*
* Copyright 2014 Telefonica Investigación y Desarrollo, S.A.U
*
* This file is part of iotagent-lwm2m-lib
*
* iotagent-lwm2m-lib is free software: you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the License,
* or (at your option) any later version.
*
* iotagent-lwm2m-lib 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with iotagent-lwm2m-lib.
* If not, seehttp://www.gnu.org/licenses/.
*
* For those usages not covered by the GNU Affero General Public License
* please contact with::[contacto@tid.es]
*/
'use strict';
var async = require('async'),
apply = async.apply,
objectRegistry = require('./objectRegistry');
/**
* Extract Object type, id and payload from the request URI, returning it using the callback.
*
* @param {Object} req Arriving COAP Request to be handled.
* @param {Object} res Outgoing COAP Response.
*/
function extractUriInfo(req, res, callback) {
var element,
elementList = [],
objectType,
objectInstance,
resourceId,
objectUri,
payload = req.payload.toString('utf8'),
currentPath = req.urlObj.pathname;
/* jshint -W084 */
while (element = currentPath.match(/\/\d+/)) {
elementList.push(element[0].substr(1));
currentPath = currentPath.substr(element[0].length);
}
/* jshint +W084 */
objectType = elementList[0];
objectInstance = elementList[1];
resourceId = elementList[2];
if (objectInstance) {
objectUri = '/' + objectType + '/' + objectInstance;
} else {
objectUri = '/' + objectType;
}
callback(null, objectUri, resourceId, payload);
}
/**
* Invoke the user handler for this operation, with all the information from the query parameters as its arguments.
*
* @param {Object} queryParams Object containing all the query parameters.
* @param {Function} handler User handler to be invoked.
*/
function applyHandler(resourceId, attributeValue, handler, storedObject, callback) {
handler(storedObject.objectType, storedObject.objectId, resourceId, attributeValue, callback);
}
/**
* Generates the end of request handler that will generate the final response to the COAP Client.
*
* @param {Object} req Arriving COAP Request to be handled.
* @param {Object} res Outgoing COAP Response.
* @returns {Function} Request handler, receiving an optional error and the write operation result.
*/
function endWrite(req, res) {
return function (error, result) {
if (error) {
res.code = error.code;
res.end('');
} else {
res.code = '2.04';
res.end('');
}
};
}
function writeAttributes(objectUri, resourceId, query, callback) {
function split(pair) {
return pair.split('=');
}
function group(previous, current) {
if (current && current.length === 2) {
previous[current[0]] = current[1];
}
return previous;
}
var attributes = query.split('&').map(split).reduce(group, {});
if (resourceId) {
objectRegistry.setAttributes(objectUri + '/' + resourceId, attributes, callback);
} else {
objectRegistry.setAttributes(objectUri, attributes, callback);
}
}
function write(objectUri, resourceId, payload, handler, callback) {
async.waterfall([
apply(objectRegistry.setResource, objectUri, resourceId, payload),
apply(applyHandler, resourceId, payload, handler)
], callback);
}
/**
* Handle the write operation.
*
* @param {Object} req Arriving COAP Request to be handled.
* @param {Object} res Outgoing COAP Response.
* @param {Function} handler User handler to be executed if everything goes ok.
*/
function handleWrite(req, res, handler) {
extractUriInfo(req, res, function (error, objectUri, resourceId, payload) {
Iif (error) {
endWrite(req, res)(error);
} else {
if (req.url.indexOf('?') > 0) {
writeAttributes(objectUri, resourceId, req.urlObj.query, endWrite(req, res));
} else {
write(objectUri, resourceId, payload, handler, endWrite(req, res));
}
}
});
}
exports.handle = handleWrite; |