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/*
* This file is open source software, licensed to you under the terms
* of the Apache License, Version 2.0 (the "License"). See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. You may not use this file except in compliance with the License.
*
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Copyright 2015 Cloudius Systems
*/
#include <memory>
#include <seastar/http/httpd.hh>
#include <seastar/http/handlers.hh>
#include <seastar/http/function_handlers.hh>
#include <seastar/http/file_handler.hh>
#include <seastar/core/seastar.hh>
#include <seastar/core/reactor.hh>
#include <seastar/core/app-template.hh>
#include "demo.json.hh"
#include <seastar/http/api_docs.hh>
#include <seastar/core/thread.hh>
#include <seastar/core/prometheus.hh>
#include <seastar/core/print.hh>
#include <seastar/net/inet_address.hh>
#include <seastar/util/defer.hh>
#include "../lib/stop_signal.hh"
namespace bpo = boost::program_options;
using namespace seastar;
using namespace httpd;
class handl : public httpd::handler_base {
public:
virtual future<std::unique_ptr<http::reply> > handle(const sstring& path,
std::unique_ptr<http::request> req, std::unique_ptr<http::reply> rep) {
rep->_content = "hello";
rep->done("html");
return make_ready_future<std::unique_ptr<http::reply>>(std::move(rep));
}
};
void set_routes(routes& r) {
function_handler* h1 = new function_handler([](const_req req) {
return "hello";
});
function_handler* h2 = new function_handler([](std::unique_ptr<http::request> req) {
return make_ready_future<json::json_return_type>("json-future");
});
r.add(operation_type::GET, url("/"), h1);
r.add(operation_type::GET, url("/jf"), h2);
r.add(operation_type::GET, url("/file").remainder("path"),
new directory_handler("/"));
demo_json::hello_world.set(r, [] (const_req req) {
demo_json::my_object obj;
obj.var1 = req.param.at("var1");
obj.var2 = req.param.at("var2");
demo_json::ns_hello_world::query_enum v = demo_json::ns_hello_world::str2query_enum(req.query_parameters.at("query_enum"));
// This demonstrate enum conversion
obj.enum_var = v;
return obj;
});
}
int main(int ac, char** av) {
app_template app;
app.add_options()("port", bpo::value<uint16_t>()->default_value(10000), "HTTP Server port");
app.add_options()("prometheus_port", bpo::value<uint16_t>()->default_value(9180), "Prometheus port. Set to zero in order to disable.");
app.add_options()("prometheus_address", bpo::value<sstring>()->default_value("0.0.0.0"), "Prometheus address");
app.add_options()("prometheus_prefix", bpo::value<sstring>()->default_value("seastar_httpd"), "Prometheus metrics prefix");
return app.run(ac, av, [&] {
return seastar::async([&] {
seastar_apps_lib::stop_signal stop_signal;
auto&& config = app.configuration();
httpd::http_server_control prometheus_server;
bool prometheus_started = false;
auto stop_prometheus = defer([&] () noexcept {
if (prometheus_started) {
std::cout << "Stoppping Prometheus server" << std::endl; // This can throw, but won't.
prometheus_server.stop().get();
}
});
uint16_t pport = config["prometheus_port"].as<uint16_t>();
if (pport) {
prometheus::config pctx;
net::inet_address prom_addr(config["prometheus_address"].as<sstring>());
pctx.metric_help = "seastar::httpd server statistics";
pctx.prefix = config["prometheus_prefix"].as<sstring>();
std::cout << "starting prometheus API server" << std::endl;
prometheus_server.start("prometheus").get();
prometheus::start(prometheus_server, pctx).get();
prometheus_started = true;
prometheus_server.listen(socket_address{prom_addr, pport}).handle_exception([prom_addr, pport] (auto ep) {
std::cerr << seastar::format("Could not start Prometheus API server on {}:{}: {}\n", prom_addr, pport, ep);
return make_exception_future<>(ep);
}).get();
}
uint16_t port = config["port"].as<uint16_t>();
auto server = std::make_unique<http_server_control>();
auto rb = make_shared<api_registry_builder>("apps/httpd/");
server->start().get();
auto stop_server = defer([&] () noexcept {
std::cout << "Stoppping HTTP server" << std::endl; // This can throw, but won't.
server->stop().get();
});
server->set_routes(set_routes).get();
server->set_routes([rb](routes& r){rb->set_api_doc(r);}).get();
server->set_routes([rb](routes& r) {rb->register_function(r, "demo", "hello world application");}).get();
server->listen(port).get();
std::cout << "Seastar HTTP server listening on port " << port << " ...\n";
stop_signal.wait().get();
return 0;
});
});
}
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