aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/node/index.js
blob: 071bfd7927bab798c2bf0920355be32c54cd7242 (plain)
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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
/*
 *
 * 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 path = require('path');
var fs = require('fs');

var SSL_ROOTS_PATH = path.resolve(__dirname, '..', '..', 'etc', 'roots.pem');

var _ = require('lodash');

var ProtoBuf = require('protobufjs');

var client = require('./src/client.js');

var server = require('./src/server.js');

var common = require('./src/common.js');

var Metadata = require('./src/metadata.js');

var grpc = require('./src/grpc_extension');

var protobuf_js_5_common = require('./src/protobuf_js_5_common');
var protobuf_js_6_common = require('./src/protobuf_js_6_common');

grpc.setDefaultRootsPem(fs.readFileSync(SSL_ROOTS_PATH, 'ascii'));

/**
 * Load a ProtoBuf.js object as a gRPC object. The options object can provide
 * the following options:
 * - binaryAsBase64: deserialize bytes values as base64 strings instead of
 *   Buffers. Defaults to false
 * - longsAsStrings: deserialize long values as strings instead of objects.
 *   Defaults to true
 * - enumsAsStrings: deserialize enum values as strings instead of numbers.
 *   Defaults to true
 * - deprecatedArgumentOrder: Use the beta method argument order for client
 *   methods, with optional arguments after the callback. Defaults to false.
 *   This option is only a temporary stopgap measure to smooth an API breakage.
 *   It is deprecated, and new code should not use it.
 * - protobufjsVersion: Available values are 5, 6, and 'detect'. 5 and 6
 *   respectively indicate that an object from the corresponding version of
 *   ProtoBuf.js is provided in the value argument. If the option is 'detect',
 *   gRPC will guess what the version is based on the structure of the value.
 *   Defaults to 'detect'.
 * @param {Object} value The ProtoBuf.js reflection object to load
 * @param {Object=} options Options to apply to the loaded file
 * @return {Object<string, *>} The resulting gRPC object
 */
exports.loadObject = function loadObject(value, options) {
  options = _.defaults(options, common.defaultGrpcOptions);
  options = _.defaults(options, {'protobufjsVersion': 'detect'});
  var protobufjsVersion;
  if (options.protobufjsVersion === 'detect') {
    if (protobuf_js_6_common.isProbablyProtobufJs6(value)) {
      protobufjsVersion = 6;
    } else if (protobuf_js_5_common.isProbablyProtobufJs5(value)) {
      protobufjsVersion = 5;
    } else {
      var error_message = 'Could not detect ProtoBuf.js version. Please ' +
          'specify the version number with the "protobufjs_version" option';
      throw new Error(error_message);
    }
  } else {
    protobufjsVersion = options.protobufjsVersion;
  }
  switch (protobufjsVersion) {
    case 6: return protobuf_js_6_common.loadObject(value, options);
    case 5:
    var deprecation_message = 'Calling grpc.loadObject with an object ' +
        'generated by ProtoBuf.js 5 is deprecated. Please upgrade to ' +
        'ProtoBuf.js 6.';
    common.log(grpc.logVerbosity.INFO, deprecation_message);
    return protobuf_js_5_common.loadObject(value, options);
    default:
    throw new Error('Unrecognized protobufjsVersion', protobufjsVersion);
  }
};

var loadObject = exports.loadObject;

function applyProtoRoot(filename, root) {
  if (_.isString(filename)) {
    return filename;
  }
  filename.root = path.resolve(filename.root) + '/';
  root.resolvePath = function(originPath, importPath, alreadyNormalized) {
    return ProtoBuf.util.path.resolve(filename.root,
                                      importPath,
                                      alreadyNormalized);
  };
  return filename.file;
}

/**
 * Load a gRPC object from a .proto file. The options object can provide the
 * following options:
 * - convertFieldsToCamelCase: Load this file with field names in camel case
 *   instead of their original case
 * - binaryAsBase64: deserialize bytes values as base64 strings instead of
 *   Buffers. Defaults to false
 * - longsAsStrings: deserialize long values as strings instead of objects.
 *   Defaults to true
 * - enumsAsStrings: deserialize enum values as strings instead of numbers.
 *   Defaults to true
 * - deprecatedArgumentOrder: Use the beta method argument order for client
 *   methods, with optional arguments after the callback. Defaults to false.
 *   This option is only a temporary stopgap measure to smooth an API breakage.
 *   It is deprecated, and new code should not use it.
 * @param {string|{root: string, file: string}} filename The file to load
 * @param {string=} format The file format to expect. Must be either 'proto' or
 *     'json'. Defaults to 'proto'
 * @param {Object=} options Options to apply to the loaded file
 * @return {Object<string, *>} The resulting gRPC object
 */
exports.load = function load(filename, format, options) {
  /* Note: format is currently unused, because the API for loading a proto
     file or a JSON file is identical in Protobuf.js 6. In the future, there is
     still the possibility of adding other formats that would be loaded
     differently */
  options = _.defaults(options, common.defaultGrpcOptions);
  options.protobufjs_version = 6;
  var root = new ProtoBuf.Root();
  var parse_options = {keepCase: !options.convertFieldsToCamelCase};
  return loadObject(root.loadSync(applyProtoRoot(filename, root),
                                  parse_options),
                    options);
};

var log_template = _.template(
    '{severity} {timestamp}\t{file}:{line}]\t{message}',
    {interpolate: /{([\s\S]+?)}/g});

/**
 * Sets the logger function for the gRPC module. For debugging purposes, the C
 * core will log synchronously directly to stdout unless this function is
 * called. Note: the output format here is intended to be informational, and
 * is not guaranteed to stay the same in the future.
 * Logs will be directed to logger.error.
 * @param {Console} logger A Console-like object.
 */
exports.setLogger = function setLogger(logger) {
  common.logger = logger;
  grpc.setDefaultLoggerCallback(function(file, line, severity,
                                         message, timestamp) {
    logger.error(log_template({
      file: path.basename(file),
      line: line,
      severity: severity,
      message: message,
      timestamp: timestamp.toISOString()
    }));
  });
};

/**
 * Sets the logger verbosity for gRPC module logging. The options are members
 * of the grpc.logVerbosity map.
 * @param {Number} verbosity The minimum severity to log
 */
exports.setLogVerbosity = function setLogVerbosity(verbosity) {
  common.logVerbosity = verbosity;
  grpc.setLogVerbosity(verbosity);
};

/**
 * @see module:src/server.Server
 */
exports.Server = server.Server;

/**
 * @see module:src/metadata
 */
exports.Metadata = Metadata;

/**
 * Status name to code number mapping
 */
exports.status = grpc.status;

/**
 * Propagate flag name to number mapping
 */
exports.propagate = grpc.propagate;

/**
 * Call error name to code number mapping
 */
exports.callError = grpc.callError;

/**
 * Write flag name to code number mapping
 */
exports.writeFlags = grpc.writeFlags;

/**
 * Log verbosity setting name to code number mapping
 */
exports.logVerbosity = grpc.logVerbosity;

/**
 * Credentials factories
 */
exports.credentials = require('./src/credentials.js');

/**
 * ServerCredentials factories
 */
exports.ServerCredentials = grpc.ServerCredentials;

/**
 * @see module:src/client.makeClientConstructor
 */
exports.makeGenericClientConstructor = client.makeClientConstructor;

/**
 * @see module:src/client.getClientChannel
 */
exports.getClientChannel = client.getClientChannel;

/**
 * @see module:src/client.waitForClientReady
 */
exports.waitForClientReady = client.waitForClientReady;

exports.closeClient = function closeClient(client_obj) {
  client.getClientChannel(client_obj).close();
};