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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 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 = null;
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,
key_data,
pem_data);
}
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.listen();
}
/**
* See docs for getServer
*/
exports.getServer = getServer;
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