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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
'use strict';
var fs = require('fs');
var path = require('path');
var _ = require('lodash');
var grpc = require('..');
var testProto = grpc.load(__dirname + '/test.proto').grpc.testing;
/**
* Create a buffer filled with size zeroes
* @param {number} size The length of the buffer
* @return {Buffer} The new buffer
*/
function zeroBuffer(size) {
var zeros = new Buffer(size);
zeros.fill(0);
return zeros;
}
/**
* Respond to an empty parameter with an empty response.
* NOTE: this currently does not work due to issue #137
* @param {Call} call Call to handle
* @param {function(Error, Object)} callback Callback to call with result
* or error
*/
function handleEmpty(call, callback) {
callback(null, {});
}
/**
* Handle a unary request by sending the requested payload
* @param {Call} call Call to handle
* @param {function(Error, Object)} callback Callback to call with result or
* error
*/
function handleUnary(call, callback) {
var req = call.request;
var zeros = zeroBuffer(req.response_size);
var payload_type = req.response_type;
if (payload_type === 'RANDOM') {
payload_type = ['COMPRESSABLE',
'UNCOMPRESSABLE'][Math.random() < 0.5 ? 0 : 1];
}
callback(null, {payload: {type: payload_type, body: zeros}});
}
/**
* Respond to a streaming call with the total size of all payloads
* @param {Call} call Call to handle
* @param {function(Error, Object)} callback Callback to call with result or
* error
*/
function handleStreamingInput(call, callback) {
var aggregate_size = 0;
call.on('data', function(value) {
aggregate_size += value.payload.body.length;
});
call.on('end', function() {
callback(null, {aggregated_payload_size: aggregate_size});
});
}
/**
* Respond to a payload request with a stream of the requested payloads
* @param {Call} call Call to handle
*/
function handleStreamingOutput(call) {
var req = call.request;
var payload_type = req.response_type;
if (payload_type === 'RANDOM') {
payload_type = ['COMPRESSABLE',
'UNCOMPRESSABLE'][Math.random() < 0.5 ? 0 : 1];
}
_.each(req.response_parameters, function(resp_param) {
call.write({
payload: {
body: zeroBuffer(resp_param.size),
type: payload_type
}
});
});
call.end();
}
/**
* Respond to a stream of payload requests with a stream of payload responses as
* they arrive.
* @param {Call} call Call to handle
*/
function handleFullDuplex(call) {
call.on('data', function(value) {
var payload_type = value.response_type;
if (payload_type === 'RANDOM') {
payload_type = ['COMPRESSABLE',
'UNCOMPRESSABLE'][Math.random() < 0.5 ? 0 : 1];
}
_.each(value.response_parameters, function(resp_param) {
call.write({
payload: {
body: zeroBuffer(resp_param.size),
type: payload_type
}
});
});
});
call.on('end', function() {
call.end();
});
}
/**
* Respond to a stream of payload requests with a stream of payload responses
* after all requests have arrived
* @param {Call} call Call to handle
*/
function handleHalfDuplex(call) {
throw new Error('HalfDuplexCall not yet implemented');
}
/**
* Get a server object bound to the given port
* @param {string} port Port to which to bind
* @param {boolean} tls Indicates that the bound port should use TLS
* @return {{server: Server, port: number}} Server object bound to the support,
* and port number that the server is bound to
*/
function getServer(port, tls) {
// TODO(mlumish): enable TLS functionality
var options = {};
var server_creds;
if (tls) {
var key_path = path.join(__dirname, '../test/data/server1.key');
var pem_path = path.join(__dirname, '../test/data/server1.pem');
var key_data = fs.readFileSync(key_path);
var pem_data = fs.readFileSync(pem_path);
server_creds = grpc.ServerCredentials.createSsl(null,
[{private_key: key_data,
cert_chain: pem_data}]);
} else {
server_creds = grpc.ServerCredentials.createInsecure();
}
var server = new grpc.Server(options);
server.addProtoService(testProto.TestService.service, {
emptyCall: handleEmpty,
unaryCall: handleUnary,
streamingOutputCall: handleStreamingOutput,
streamingInputCall: handleStreamingInput,
fullDuplexCall: handleFullDuplex,
halfDuplexCall: handleHalfDuplex
});
var port_num = server.bind('0.0.0.0:' + port, server_creds);
return {server: server, port: port_num};
}
if (require.main === module) {
var parseArgs = require('minimist');
var argv = parseArgs(process.argv, {
string: ['port', 'use_tls']
});
var server_obj = getServer(argv.port, argv.use_tls === 'true');
console.log('Server attaching to port ' + argv.port);
server_obj.server.start();
}
/**
* See docs for getServer
*/
exports.getServer = getServer;
|
