mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 10:52:30 +00:00
246 lines
8.3 KiB
C++
246 lines
8.3 KiB
C++
#include <IO/HTTPCommon.h>
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#include <Common/config.h>
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#include <Common/DNSResolver.h>
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#include <Common/Exception.h>
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#include <Common/PoolBase.h>
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#include <Common/ProfileEvents.h>
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#include <Common/SipHash.h>
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#include <Poco/Version.h>
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#if USE_POCO_NETSSL
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#include <Poco/Net/AcceptCertificateHandler.h>
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#include <Poco/Net/Context.h>
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#include <Poco/Net/HTTPSClientSession.h>
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#include <Poco/Net/InvalidCertificateHandler.h>
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#include <Poco/Net/PrivateKeyPassphraseHandler.h>
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#include <Poco/Net/RejectCertificateHandler.h>
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#include <Poco/Net/SSLManager.h>
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#endif
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#include <Poco/Net/HTTPServerResponse.h>
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#include <Poco/Util/Application.h>
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#include <tuple>
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#include <unordered_map>
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#include <sstream>
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namespace ProfileEvents
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{
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extern const Event CreatedHTTPConnections;
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}
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int RECEIVED_ERROR_FROM_REMOTE_IO_SERVER;
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extern const int RECEIVED_ERROR_TOO_MANY_REQUESTS;
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extern const int FEATURE_IS_NOT_ENABLED_AT_BUILD_TIME;
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extern const int UNSUPPORTED_URI_SCHEME;
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}
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namespace
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{
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void setTimeouts(Poco::Net::HTTPClientSession & session, const ConnectionTimeouts & timeouts)
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{
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#if defined(POCO_CLICKHOUSE_PATCH) || POCO_VERSION >= 0x02000000
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session.setTimeout(timeouts.connection_timeout, timeouts.send_timeout, timeouts.receive_timeout);
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#else
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session.setTimeout(std::max({timeouts.connection_timeout, timeouts.send_timeout, timeouts.receive_timeout}));
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#endif
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session.setKeepAliveTimeout(timeouts.http_keep_alive_timeout);
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}
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bool isHTTPS(const Poco::URI & uri)
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{
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if (uri.getScheme() == "https")
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return true;
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else if (uri.getScheme() == "http")
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return false;
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else
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throw Exception("Unsupported scheme in URI '" + uri.toString() + "'", ErrorCodes::UNSUPPORTED_URI_SCHEME);
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}
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HTTPSessionPtr makeHTTPSessionImpl(const std::string & host, UInt16 port, bool https, bool keep_alive)
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{
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HTTPSessionPtr session;
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if (https)
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#if USE_POCO_NETSSL
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session = std::make_shared<Poco::Net::HTTPSClientSession>();
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#else
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throw Exception("ClickHouse was built without HTTPS support", ErrorCodes::FEATURE_IS_NOT_ENABLED_AT_BUILD_TIME);
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#endif
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else
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session = std::make_shared<Poco::Net::HTTPClientSession>();
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ProfileEvents::increment(ProfileEvents::CreatedHTTPConnections);
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session->setHost(DNSResolver::instance().resolveHost(host).toString());
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session->setPort(port);
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/// doesn't work properly without patch
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#if defined(POCO_CLICKHOUSE_PATCH)
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session->setKeepAlive(keep_alive);
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#else
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(void)keep_alive; // Avoid warning: unused parameter
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#endif
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return session;
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}
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class SingleEndpointHTTPSessionPool : public PoolBase<Poco::Net::HTTPClientSession>
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{
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private:
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const std::string host;
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const UInt16 port;
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bool https;
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using Base = PoolBase<Poco::Net::HTTPClientSession>;
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ObjectPtr allocObject() override
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{
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return makeHTTPSessionImpl(host, port, https, true);
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}
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public:
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SingleEndpointHTTPSessionPool(const std::string & host_, UInt16 port_, bool https_, size_t max_pool_size_)
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: Base(max_pool_size_, &Poco::Logger::get("HTTPSessionPool")), host(host_), port(port_), https(https_)
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{
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}
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};
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class HTTPSessionPool : private boost::noncopyable
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{
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private:
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using Key = std::tuple<std::string, UInt16, bool>;
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using PoolPtr = std::shared_ptr<SingleEndpointHTTPSessionPool>;
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using Entry = SingleEndpointHTTPSessionPool::Entry;
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struct Hasher
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{
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size_t operator()(const Key & k) const
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{
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SipHash s;
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s.update(std::get<0>(k));
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s.update(std::get<1>(k));
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s.update(std::get<2>(k));
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return s.get64();
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}
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};
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std::mutex mutex;
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std::unordered_map<Key, PoolPtr, Hasher> endpoints_pool;
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protected:
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HTTPSessionPool() = default;
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public:
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static auto & instance()
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{
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static HTTPSessionPool instance;
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return instance;
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}
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Entry getSession(
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const Poco::URI & uri,
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const ConnectionTimeouts & timeouts,
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size_t max_connections_per_endpoint)
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{
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std::unique_lock lock(mutex);
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const std::string & host = uri.getHost();
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UInt16 port = uri.getPort();
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bool https = isHTTPS(uri);
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auto key = std::make_tuple(host, port, https);
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auto pool_ptr = endpoints_pool.find(key);
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if (pool_ptr == endpoints_pool.end())
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std::tie(pool_ptr, std::ignore) = endpoints_pool.emplace(
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key, std::make_shared<SingleEndpointHTTPSessionPool>(host, port, https, max_connections_per_endpoint));
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auto retry_timeout = timeouts.connection_timeout.totalMicroseconds();
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auto session = pool_ptr->second->get(retry_timeout);
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/// We store exception messages in session data.
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/// Poco HTTPSession also stores exception, but it can be removed at any time.
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const auto & session_data = session->sessionData();
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if (!session_data.empty())
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{
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auto msg = Poco::AnyCast<std::string>(session_data);
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if (!msg.empty())
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{
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LOG_TRACE((&Logger::get("HTTPCommon")), "Failed communicating with " << host << " with error '" << msg << "' will try to reconnect session");
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/// Host can change IP
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const auto ip = DNSResolver::instance().resolveHost(host).toString();
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if (ip != session->getHost())
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{
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session->reset();
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session->setHost(ip);
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session->attachSessionData({});
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}
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}
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}
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setTimeouts(*session, timeouts);
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return session;
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}
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};
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}
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void setResponseDefaultHeaders(Poco::Net::HTTPServerResponse & response, unsigned keep_alive_timeout)
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{
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if (!response.getKeepAlive())
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return;
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Poco::Timespan timeout(keep_alive_timeout, 0);
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if (timeout.totalSeconds())
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response.set("Keep-Alive", "timeout=" + std::to_string(timeout.totalSeconds()));
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}
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HTTPSessionPtr makeHTTPSession(const Poco::URI & uri, const ConnectionTimeouts & timeouts)
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{
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const std::string & host = uri.getHost();
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UInt16 port = uri.getPort();
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bool https = isHTTPS(uri);
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auto session = makeHTTPSessionImpl(host, port, https, false);
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setTimeouts(*session, timeouts);
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return session;
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}
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PooledHTTPSessionPtr makePooledHTTPSession(const Poco::URI & uri, const ConnectionTimeouts & timeouts, size_t per_endpoint_pool_size)
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{
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return HTTPSessionPool::instance().getSession(uri, timeouts, per_endpoint_pool_size);
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}
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bool isRedirect(const Poco::Net::HTTPResponse::HTTPStatus status) { return status == Poco::Net::HTTPResponse::HTTP_MOVED_PERMANENTLY || status == Poco::Net::HTTPResponse::HTTP_FOUND || status == Poco::Net::HTTPResponse::HTTP_SEE_OTHER || status == Poco::Net::HTTPResponse::HTTP_TEMPORARY_REDIRECT; }
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std::istream * receiveResponse(
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Poco::Net::HTTPClientSession & session, const Poco::Net::HTTPRequest & request, Poco::Net::HTTPResponse & response, const bool allow_redirects)
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{
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auto & istr = session.receiveResponse(response);
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assertResponseIsOk(request, response, istr, allow_redirects);
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return &istr;
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}
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void assertResponseIsOk(const Poco::Net::HTTPRequest & request, Poco::Net::HTTPResponse & response, std::istream & istr, const bool allow_redirects)
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{
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auto status = response.getStatus();
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if (!(status == Poco::Net::HTTPResponse::HTTP_OK || (isRedirect(status) && allow_redirects)))
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{
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std::stringstream error_message;
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error_message << "Received error from remote server " << request.getURI() << ". HTTP status code: " << status << " "
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<< response.getReason() << ", body: " << istr.rdbuf();
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throw Exception(error_message.str(),
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status == HTTP_TOO_MANY_REQUESTS ? ErrorCodes::RECEIVED_ERROR_TOO_MANY_REQUESTS
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: ErrorCodes::RECEIVED_ERROR_FROM_REMOTE_IO_SERVER);
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}
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}
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}
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