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98 lines
2.6 KiB
98 lines
2.6 KiB
7 years ago
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//
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// ViewController.m
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// HelloWorldCpp
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//
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// Created by Muxi Yan on 1/3/18.
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// Copyright © 2018 gRPC. All rights reserved.
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//
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#import "ViewController.h"
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#import <grpc++/grpc++.h>
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#include <grpc++/generic/generic_stub.h>
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#include <grpc++/generic/async_generic_service.h>
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void* tag(int i) { return (void*)(intptr_t)i; }
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// Serialized Proto bytes of Hello World example
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const uint8_t message[] =
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{0x0A, 0x0B, 0x4F, 0x62, 0x6A, 0x65, 0x63, 0x74, 0x69, 0x76, 0x65, 0x2D, 0x43};
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@interface ViewController ()
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@end
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@implementation ViewController {
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grpc::CompletionQueue cli_cq_;
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std::unique_ptr<grpc::GenericStub> generic_stub_;
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}
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- (void)viewDidLoad {
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[super viewDidLoad];
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// Setup call stub
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std::shared_ptr<grpc::Channel> channel =
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CreateChannel("localhost:50051", grpc::InsecureChannelCredentials());
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generic_stub_.reset(new grpc::GenericStub(channel));
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const grpc::string kMethodName("/helloworld.Greeter/SayHello");
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void* got_tag;
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bool ok;
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grpc::ClientContext cli_ctx;
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std::unique_ptr<grpc::GenericClientAsyncReaderWriter> call =
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generic_stub_->Call(&cli_ctx, kMethodName, &cli_cq_, tag(1));
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cli_cq_.Next(&got_tag, &ok);
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if (!ok || got_tag != tag(1)) {
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NSLog(@"Failed to create call.");
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abort();
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}
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grpc::Slice send_slice = grpc::Slice(message, sizeof(message) / sizeof(message[0]));
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std::unique_ptr<grpc::ByteBuffer> send_buffer(new grpc::ByteBuffer(&send_slice, 1));
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call->Write(*send_buffer, tag(2));
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cli_cq_.Next(&got_tag, &ok);
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if (!ok || got_tag != tag(2)) {
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NSLog(@"Failed to send message.");
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abort();
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}
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grpc::ByteBuffer recv_buffer;
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call->Read(&recv_buffer, tag(3));
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cli_cq_.Next(&got_tag, &ok);
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if (!ok || got_tag != tag(3)) {
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NSLog(@"Failed to receive message.");
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abort();
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}
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grpc::Status status;
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call->Finish(&status, tag(4));
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cli_cq_.Next(&got_tag, &ok);
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if (!ok || got_tag != tag(4)) {
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NSLog(@"Failed to finish call.");
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abort();
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}
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if (!status.ok()) {
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NSLog(@"Received unsuccessful status code: %d", status.error_code());
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abort();
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}
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std::vector<grpc::Slice> slices;
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recv_buffer.Dump(&slices);
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NSString *recvBytes = [[NSString alloc] init];
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for (auto slice : slices) {
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auto p = slice.begin();
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while (p != slice.end()) {
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recvBytes =
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[recvBytes stringByAppendingString:[NSString stringWithFormat:@"%02x ", *p]];
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p++;
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}
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}
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NSLog(@"Hello World succeeded.\nReceived bytes: %@\n"
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"Expected bytes: 0a 11 48 65 6c 6c 6f 20 4f 62 6a 65 63 74 69 76 65 2d 43", recvBytes);
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}
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- (void)didReceiveMemoryWarning {
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[super didReceiveMemoryWarning];
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}
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@end
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