grpc-swift/Packages/EchoClient/main.swift

/*
 *
 * Copyright 2016, 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.
 *
 */
import gRPC

gRPC.initialize()
let fileDescriptorSetProto = NSData(contentsOfFile:"echo.out")
let fileDescriptorSet = FileDescriptorSet(proto:fileDescriptorSetProto)

if let requestMessage = fileDescriptorSet.createMessage(name:"EchoRequest") {
  requestMessage.addField(name:"text", value:"hello")

  let requestHost = "foo.test.google.fr"
  let requestMethod = "/echo.Echo/Get"
  let requestBuffer = ByteBuffer(data:requestMessage.serialize())
  let requestMetadata = Metadata()

  let client = Client(address:address)
  let response = client.performRequest(host:requestHost,
                                       method:requestMethod,
                                       message:requestBuffer,
                                       metadata:requestMetadata)

  print("Received status: \(response.status) " + response.statusDetails)

  if let responseBuffer = response.message,
    let responseMessage = fileDescriptorSet.readMessage(name:"EchoResponse",
                                                        proto:responseBuffer.data()) {
    responseMessage.forOneField(name:"text") {(field) in
      print(field.string())
    }
  } else {
	print("No message received. gRPC Status \(response.status) " + response.statusDetails)
  }
}