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
|
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 net = require('net');
var tls = require('tls');
var TBufferedTransport = require('./buffered_transport');
var TBinaryProtocol = require('./binary_protocol');
var InputBufferUnderrunError = require('./input_buffer_underrun_error');
/**
* Create a Thrift server which can serve one or multiple services.
* @param {object} processor - A normal or multiplexedProcessor (must
* be preconstructed with the desired handler).
* @param {ServerOptions} options - Optional additional server configuration.
* @returns {object} - The Apache Thrift Multiplex Server.
*/
exports.createMultiplexServer = function(processor, options) {
var transport = (options && options.transport) ? options.transport : TBufferedTransport;
var protocol = (options && options.protocol) ? options.protocol : TBinaryProtocol;
function serverImpl(stream) {
var self = this;
stream.on('error', function(err) {
self.emit('error', err);
});
stream.on('data', transport.receiver(function(transportWithData) {
var input = new protocol(transportWithData);
var output = new protocol(new transport(undefined, function(buf) {
try {
stream.write(buf);
} catch (err) {
self.emit('error', err);
stream.end();
}
}));
try {
do {
processor.process(input, output);
transportWithData.commitPosition();
} while (true);
} catch (err) {
if (err instanceof InputBufferUnderrunError) {
//The last data in the buffer was not a complete message, wait for the rest
transportWithData.rollbackPosition();
}
else if (err.message === "Invalid type: undefined") {
//No more data in the buffer
//This trap is a bit hackish
//The next step to improve the node behavior here is to have
// the compiler generated process method throw a more explicit
// error when the network buffer is empty (regardles of the
// protocol/transport stack in use) and replace this heuristic.
// Also transports should probably not force upper layers to
// manage their buffer positions (i.e. rollbackPosition() and
// commitPosition() should be eliminated in lieu of a transport
// encapsulated buffer management strategy.)
transportWithData.rollbackPosition();
}
else {
//Unexpected error
self.emit('error', err);
stream.end();
}
}
}));
stream.on('end', function() {
stream.end();
});
}
if (options && options.tls) {
return tls.createServer(options.tls, serverImpl);
} else {
return net.createServer(serverImpl);
}
};
/**
* Create a single service Apache Thrift server.
* @param {object} processor - A service class or processor function.
* @param {ServerOptions} options - Optional additional server configuration.
* @returns {object} - The Apache Thrift Multiplex Server.
*/
exports.createServer = function(processor, handler, options) {
if (processor.Processor) {
processor = processor.Processor;
}
return exports.createMultiplexServer(new processor(handler), options);
};
|
