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/*
*
* 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 _ = require('lodash');
var ProtoBuf = require('protobufjs');
var client = require('./src/client.js');
var server = require('./src/server.js');
var grpc = require('bindings')('grpc');
/**
* Load a gRPC object from an existing ProtoBuf.Reflect object.
* @param {ProtoBuf.Reflect.Namespace} value The ProtoBuf object to load.
* @return {Object<string, *>} The resulting gRPC object
*/
function loadObject(value) {
var result = {};
if (value.className === 'Namespace') {
_.each(value.children, function(child) {
result[child.name] = loadObject(child);
});
return result;
} else if (value.className === 'Service') {
return client.makeProtobufClientConstructor(value);
} else if (value.className === 'Message' || value.className === 'Enum') {
return value.build();
} else {
return value;
}
}
/**
* Load a gRPC object from a .proto file.
* @param {string} filename The file to load
* @param {string=} format The file format to expect. Must be either 'proto' or
* 'json'. Defaults to 'proto'
* @return {Object<string, *>} The resulting gRPC object
*/
function load(filename, format) {
if (!format) {
format = 'proto';
}
var builder;
switch(format) {
case 'proto':
builder = ProtoBuf.loadProtoFile(filename);
break;
case 'json':
builder = ProtoBuf.loadJsonFile(filename);
break;
default:
throw new Error('Unrecognized format "' + format + '"');
}
return loadObject(builder.ns);
}
/**
* Get a function that a client can use to update metadata with authentication
* information from a Google Auth credential object, which comes from the
* google-auth-library.
* @param {Object} credential The credential object to use
* @return {function(Object, callback)} Metadata updater function
*/
function getGoogleAuthDelegate(credential) {
/**
* Update a metadata object with authentication information.
* @param {string} authURI The uri to authenticate to
* @param {Object} metadata Metadata object
* @param {function(Error, Object)} callback
*/
return function updateMetadata(authURI, metadata, callback) {
metadata = _.clone(metadata);
if (metadata.Authorization) {
metadata.Authorization = _.clone(metadata.Authorization);
} else {
metadata.Authorization = [];
}
credential.getRequestMetadata(authURI, function(err, header) {
if (err) {
callback(err);
return;
}
metadata.Authorization.push(header.Authorization);
callback(null, metadata);
});
};
}
/**
* See docs for loadObject
*/
exports.loadObject = loadObject;
/**
* See docs for load
*/
exports.load = load;
/**
* See docs for server.makeServerConstructor
*/
exports.buildServer = server.makeProtobufServerConstructor;
/**
* Status name to code number mapping
*/
exports.status = grpc.status;
/**
* Call error name to code number mapping
*/
exports.callError = grpc.callError;
/**
* Credentials factories
*/
exports.Credentials = grpc.Credentials;
/**
* ServerCredentials factories
*/
exports.ServerCredentials = grpc.ServerCredentials;
exports.getGoogleAuthDelegate = getGoogleAuthDelegate;
exports.makeGenericClientConstructor = client.makeClientConstructor;
exports.makeGenericServerConstructor = server.makeServerConstructor;
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