mirror of https://github.com/grpc/grpc-node.git
142 lines
4.2 KiB
JavaScript
142 lines
4.2 KiB
JavaScript
/*
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*
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* Copyright 2015, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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var _ = require('underscore');
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var ProtoBuf = require('protobufjs');
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var client = require('./src/client.js');
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var server = require('./src/server.js');
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var grpc = require('bindings')('grpc');
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/**
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* Load a gRPC object from an existing ProtoBuf.Reflect object.
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* @param {ProtoBuf.Reflect.Namespace} value The ProtoBuf object to load.
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* @return {Object<string, *>} The resulting gRPC object
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*/
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function loadObject(value) {
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var result = {};
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if (value.className === 'Namespace') {
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_.each(value.children, function(child) {
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result[child.name] = loadObject(child);
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});
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return result;
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} else if (value.className === 'Service') {
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return client.makeClientConstructor(value);
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} else if (value.className === 'Message' || value.className === 'Enum') {
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return value.build();
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} else {
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return value;
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}
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}
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/**
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* Load a gRPC object from a .proto file.
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* @param {string} filename The file to load
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* @return {Object<string, *>} The resulting gRPC object
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*/
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function load(filename) {
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var builder = ProtoBuf.loadProtoFile(filename);
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return loadObject(builder.ns);
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}
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/**
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* Get a function that a client can use to update metadata with authentication
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* information from a Google Auth credential object, which comes from the
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* googleauth library.
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* @param {Object} credential The credential object to use
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* @return {function(Object, callback)} Metadata updater function
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*/
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function getGoogleAuthDelegate(credential) {
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/**
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* Update a metadata object with authentication information.
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* @param {Object} metadata Metadata object
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* @param {function(Error, Object)} callback
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*/
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return function updateMetadata(metadata, callback) {
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metadata = _.clone(metadata);
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if (metadata.Authorization) {
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metadata.Authorization = _.clone(metadata.Authorization);
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} else {
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metadata.Authorization = [];
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}
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credential.getAccessToken(function(err, token) {
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if (err) {
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callback(err);
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return;
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}
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metadata.Authorization.push('Bearer ' + token);
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callback(null, metadata);
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});
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};
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}
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/**
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* See docs for loadObject
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*/
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exports.loadObject = loadObject;
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/**
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* See docs for load
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*/
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exports.load = load;
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/**
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* See docs for server.makeServerConstructor
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*/
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exports.buildServer = server.makeServerConstructor;
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/**
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* Status name to code number mapping
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*/
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exports.status = grpc.status;
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/**
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* Call error name to code number mapping
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*/
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exports.callError = grpc.callError;
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/**
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* Credentials factories
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*/
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exports.Credentials = grpc.Credentials;
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/**
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* ServerCredentials factories
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*/
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exports.ServerCredentials = grpc.ServerCredentials;
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exports.getGoogleAuthDelegate = getGoogleAuthDelegate;
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