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