forked from JCMais/node-libcurl
-
Notifications
You must be signed in to change notification settings - Fork 0
/
send-method.js
138 lines (101 loc) · 4.3 KB
/
send-method.js
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
/**
* @author Jonathan Cardoso Machado
* @license MIT
* @copyright 2015, Jonathan Cardoso Machado
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* This is an example showing how one could use the send and recv methods
*/
var Easy = require( '../lib/Easy' ),
Multi= require( '../lib/Multi' ),
Curl = require( '../lib/Curl' ),
easy = new Easy(),
multi= new Multi(),
send = new Buffer( 'GET / HTTP/1.0\r\nHost: example.com\r\n\r\n' ),
recv = new Buffer( 5 * 1024 * 1024 ), //reserve 5mb
isSent = false,
shouldUseMultiHandle = true;;
recv.fill( 0 );
easy.setOpt( Curl.option.URL, 'http://example.com' );
// CONNECT_ONLY must be set to send and recv work
easy.setOpt( Curl.option.CONNECT_ONLY, true );
//This callback is going to be called when there is some action
// in the socket responsible for this handle.
// Remember that, for it to be called, one must have called easy.monitorSocketEvents();
easy.onSocketEvent( function ( err, events ) {
var ret,
isWritable = events & Easy.socket.WRITABLE,
isReadable = events & Easy.socket.READABLE;
if ( err ) {
throw err;
}
// Make sure the socket is writable, and, that we have not sent the request already.
if ( isWritable && !isSent ) {
console.log( 'Sending request.' );
ret = easy.send( send );
// ret is an array, with [0] being returnCode, and [1] the number of bytes sent.
// just lets make sure the returnCode is correct and that all the data was sent.
if ( ret[0] != Curl.code.CURLE_OK || ret[1] != send.length ) {
throw Error( 'Something went wrong.' );
}
console.log( 'Sent ' + ret[1] + ' bytes.' );
isSent = true;
// Here we must check if the socket is readable, and that we have sent the data already.
} else if ( isReadable && isSent ) {
console.log( 'Reading request response.' );
ret = easy.recv( recv );
//same than above, but [1] now is the number of bytes we have read.
if ( ret[0] !== Curl.code.CURLE_OK ) {
throw Error( Easy.strError( ret[0] ) );
}
console.log( recv.toString( 'utf8', 0, ret[1] ) );
//we don't need to monitor for events anymore, so let's just stop the socket polling
this.unmonitorSocketEvents();
if ( shouldUseMultiHandle ) {
multi.removeHandle( easy );
multi.close();
}
easy.close();
}
});
//send and recv only works with the multi handle
// if you are using a libcurl version greater than 7.42
// See: https://github.com/bagder/curl/commit/ecc4940df2c286702262f8c21d7369f893e78968
if ( shouldUseMultiHandle ) {
multi.onMessage( function ( err, easy, errorCode ) {
if ( err ) {
console.error( 'Error code: ' + errorCode );
throw err;
}
//ok, connection made!
// monitor for socket events
easy.monitorSocketEvents();
});
multi.addHandle( easy );
} else {
var result = easy.perform();
if ( result != Curl.code.CURLE_OK ) {
throw Error( Easy.strError( result ) );
}
//Using just the easy interface,
// the connection is made right after the perform call
// so we can already start monitoring for socket events
easy.monitorSocketEvents();
}