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Copy pathdeferred_with_accumulator.cpp
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74 lines (59 loc) · 2.49 KB
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/*
This file is part of libhttpserver
Copyright (C) 2011, 2012, 2013, 2014, 2015 Sebastiano Merlino
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA
*/
#include <atomic>
// cpplint errors on chrono and thread because they are replaced (in Chromium) by other google libraries.
// This is not an issue here.
#include <chrono> // NOLINT [build/c++11]
#include <thread> // NOLINT [build/c++11]
#include <httpserver.hpp>
std::atomic<int> counter;
ssize_t test_callback(std::shared_ptr<std::atomic<int> > closure_data, char* buf, size_t max) {
int reqid;
if (closure_data == nullptr) {
reqid = -1;
} else {
reqid = *closure_data;
}
// only first 5 connections can be established
if (reqid >= 5) {
return -1;
} else {
// respond corresponding request IDs to the clients
std::string str = "";
str += std::to_string(reqid) + " ";
memset(buf, 0, max);
std::copy(str.begin(), str.end(), buf);
// keep sending reqid
// sleep(1); ==> adapted for C++11 on non-*Nix systems
std::this_thread::sleep_for(std::chrono::seconds(1));
return (ssize_t)max;
}
}
class deferred_resource : public httpserver::http_resource {
public:
const std::shared_ptr<httpserver::http_response> render_GET(const httpserver::http_request&) {
std::shared_ptr<std::atomic<int> > closure_data(new std::atomic<int>(counter++));
return std::shared_ptr<httpserver::deferred_response<std::atomic<int> > >(new httpserver::deferred_response<std::atomic<int> >(test_callback, closure_data, "cycle callback response"));
}
};
int main() {
httpserver::webserver ws = httpserver::create_webserver(8080);
deferred_resource hwr;
ws.register_resource("/hello", &hwr);
ws.start(true);
return 0;
}