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128 lines
3.9 KiB
C++
128 lines
3.9 KiB
C++
#pragma once
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#include <Poco/Net/HTTPRequestHandlerFactory.h>
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#include <Poco/Net/HTTPServerRequest.h>
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#include <Poco/Net/HTTPServerResponse.h>
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#include <common/logger_useful.h>
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#include "IServer.h"
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#include "HTTPHandler.h"
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#include "InterserverIOHTTPHandler.h"
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#include "NotFoundHandler.h"
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#include "PingRequestHandler.h"
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#include "PrometheusRequestHandler.h"
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#include "ReplicasStatusHandler.h"
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#include "RootRequestHandler.h"
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namespace DB
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{
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/// Handle request using child handlers
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class HTTPRequestHandlerFactoryMain : public Poco::Net::HTTPRequestHandlerFactory
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{
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private:
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using TThis = HTTPRequestHandlerFactoryMain;
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IServer & server;
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Logger * log;
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std::string name;
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std::vector<std::unique_ptr<Poco::Net::HTTPRequestHandlerFactory>> child_handler_factories;
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public:
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HTTPRequestHandlerFactoryMain(IServer & server_, const std::string & name_);
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Poco::Net::HTTPRequestHandler * createRequestHandler(const Poco::Net::HTTPServerRequest & request) override;
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template <typename T, typename... TArgs>
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TThis * addHandler(TArgs &&... args)
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{
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child_handler_factories.emplace_back(std::make_unique<T>(server, std::forward<TArgs>(args)...));
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return this;
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}
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};
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/// Handle POST or GET with params
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template <typename HandleType>
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class HTTPQueryRequestHandlerFactory : public Poco::Net::HTTPRequestHandlerFactory
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{
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private:
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IServer & server;
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public:
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HTTPQueryRequestHandlerFactory(IServer & server_) : server(server_) {}
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Poco::Net::HTTPRequestHandler * createRequestHandler(const Poco::Net::HTTPServerRequest & request) override
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{
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if (request.getURI().find('?') != std::string::npos || request.getMethod() == Poco::Net::HTTPRequest::HTTP_POST)
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return new HandleType(server);
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return nullptr;
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}
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};
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/// Handle GET or HEAD endpoint on specified path
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template <typename TGetEndpoint>
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class HTTPGetRequestHandlerFactory : public Poco::Net::HTTPRequestHandlerFactory
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{
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private:
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IServer & server;
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public:
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HTTPGetRequestHandlerFactory(IServer & server_) : server(server_) {}
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Poco::Net::HTTPRequestHandler * createRequestHandler(const Poco::Net::HTTPServerRequest & request) override
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{
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auto & method = request.getMethod();
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if (!(method == Poco::Net::HTTPRequest::HTTP_GET || method == Poco::Net::HTTPRequest::HTTP_HEAD))
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return nullptr;
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auto & uri = request.getURI();
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bool uri_match = TGetEndpoint::strict_path ? uri == TGetEndpoint::path : startsWith(uri, TGetEndpoint::path);
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if (uri_match)
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return new typename TGetEndpoint::HandleType(server);
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return nullptr;
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}
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};
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struct RootEndpoint
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{
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static constexpr auto path = "/";
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static constexpr auto strict_path = true;
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using HandleType = RootRequestHandler;
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};
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struct PingEndpoint
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{
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static constexpr auto path = "/ping";
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static constexpr auto strict_path = true;
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using HandleType = PingRequestHandler;
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};
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struct ReplicasStatusEndpoint
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{
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static constexpr auto path = "/replicas_status";
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static constexpr auto strict_path = false;
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using HandleType = ReplicasStatusHandler;
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};
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using HTTPRootRequestHandlerFactory = HTTPGetRequestHandlerFactory<RootEndpoint>;
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using HTTPPingRequestHandlerFactory = HTTPGetRequestHandlerFactory<PingEndpoint>;
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using HTTPReplicasStatusRequestHandlerFactory = HTTPGetRequestHandlerFactory<ReplicasStatusEndpoint>;
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template <typename HandleType>
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HTTPRequestHandlerFactoryMain * createDefaultHandlerFatory(IServer & server, const std::string & name)
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{
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auto handlerFactory = new HTTPRequestHandlerFactoryMain(server, name);
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handlerFactory->addHandler<HTTPRootRequestHandlerFactory>()
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->addHandler<HTTPPingRequestHandlerFactory>()
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->addHandler<HTTPReplicasStatusRequestHandlerFactory>()
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->addHandler<HTTPQueryRequestHandlerFactory<HandleType>>();
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return handlerFactory;
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}
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}
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