client.cc

#include <string.h>
#include <stdio.h>
#include "workflow/Workflow.h"
#include "workflow/WFTaskFactory.h"
#include "workflow/WFFacilities.h"
#include "message.h"

using WFTutorialTask = WFNetworkTask<protocol::TutorialRequest,
									 protocol::TutorialResponse>;
using tutorial_callback_t = std::function<void (WFTutorialTask *)>;

using namespace protocol;

class MyFactory : public WFTaskFactory
{
public:
	static WFTutorialTask *create_tutorial_task(const std::string& host,
												unsigned short port,
												int retry_max,
												tutorial_callback_t callback)
	{
		using NTF = WFNetworkTaskFactory<TutorialRequest, TutorialResponse>;
		WFTutorialTask *task = NTF::create_client_task(TT_TCP, host, port,
													   retry_max,
													   std::move(callback));
		task->set_keep_alive(30 * 1000);
		return task;
	}
};

int main(int argc, char *argv[])
{
	unsigned short port;
	std::string host;

	if (argc != 3)
	{
		fprintf(stderr, "USAGE: %s <host> <port>\n", argv[0]);
		exit(1);
	}

	host = argv[1];
	port = atoi(argv[2]);

	auto&& create = [host, port](WFRepeaterTask *)->SubTask *{
		char buf[1024];
		printf("Input next request string (Ctrl-D to exit): ");
		*buf = '\0';
		scanf("%1023s", buf);
		size_t body_size = strlen(buf);
		if (body_size == 0)
		{
			printf("\n");
			return NULL;
		}

		WFTutorialTask *task = MyFactory::create_tutorial_task(host, port, 0,
											[](WFTutorialTask *task) {
			int state = task->get_state();
			int error = task->get_error();
			TutorialResponse *resp = task->get_resp();
			void *body;
			size_t body_size;

			if (state == WFT_STATE_SUCCESS)
			{
				resp->get_message_body_nocopy(&body, &body_size);
				printf("Server Response: %.*s\n", (int)body_size, (char *)body);
			}
			else
			{
				const char *str = WFGlobal::get_error_string(state, error);
				fprintf(stderr, "Error: %s\n", str);
			}
		});

		task->get_req()->set_message_body(buf, body_size);
		task->get_resp()->set_size_limit(4 * 1024);
		return task;
	};

	WFFacilities::WaitGroup wait_group(1);

	WFRepeaterTask *repeater;
	repeater = WFTaskFactory::create_repeater_task(std::move(create), nullptr);
	Workflow::start_series_work(repeater, [&wait_group](const SeriesWork *) {
		wait_group.done();
	});

	wait_group.wait();
	return 0;
}