The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#) https://grpc.io/
 
 
 
 
 
 

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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.
*
*/
#include <gflags/gflags.h>
#include <iostream>
#include <memory>
#include <sstream>
#include <string>
#include <grpc++/channel.h>
#include <grpc++/client_context.h>
#include <grpc++/create_channel.h>
#include <grpc/support/log.h>
#include "src/proto/grpc/testing/echo.grpc.pb.h"
DEFINE_string(address, "", "Address to connect to");
DEFINE_string(mode, "", "Test mode to use");
using grpc::testing::EchoRequest;
using grpc::testing::EchoResponse;
// In some distros, gflags is in the namespace google, and in some others,
// in gflags. This hack is enabling us to find both.
namespace google {}
namespace gflags {}
using namespace google;
using namespace gflags;
int main(int argc, char** argv) {
ParseCommandLineFlags(&argc, &argv, true);
auto stub = grpc::testing::EchoTestService::NewStub(
grpc::CreateChannel(FLAGS_address, grpc::InsecureChannelCredentials()));
EchoRequest request;
EchoResponse response;
grpc::ClientContext context;
context.set_wait_for_ready(true);
if (FLAGS_mode == "bidi") {
auto stream = stub->BidiStream(&context);
for (int i = 0;; i++) {
std::ostringstream msg;
msg << "Hello " << i;
request.set_message(msg.str());
GPR_ASSERT(stream->Write(request));
GPR_ASSERT(stream->Read(&response));
GPR_ASSERT(response.message() == request.message());
}
} else if (FLAGS_mode == "response") {
EchoRequest request;
request.set_message("Hello");
auto stream = stub->ResponseStream(&context, request);
for (;;) {
GPR_ASSERT(stream->Read(&response));
}
} else {
gpr_log(GPR_ERROR, "invalid test mode '%s'", FLAGS_mode.c_str());
return 1;
}
return 0;
}