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223 lines
6.7 KiB
C++
223 lines
6.7 KiB
C++
#pragma once
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#include <Poco/Net/TCPServerConnection.h>
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#include <common/getFQDNOrHostName.h>
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#include <Common/CurrentMetrics.h>
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#include <Common/Stopwatch.h>
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#include <Core/Protocol.h>
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#include <Core/QueryProcessingStage.h>
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#include <IO/Progress.h>
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#include <IO/TimeoutSetter.h>
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#include <DataStreams/BlockIO.h>
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#include <Interpreters/InternalTextLogsQueue.h>
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#include <Interpreters/Context.h>
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#include "IServer.h"
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namespace CurrentMetrics
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{
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extern const Metric TCPConnection;
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}
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namespace Poco { class Logger; }
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namespace DB
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{
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class ColumnsDescription;
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/// State of query processing.
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struct QueryState
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{
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/// Identifier of the query.
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String query_id;
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QueryProcessingStage::Enum stage = QueryProcessingStage::Complete;
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Protocol::Compression compression = Protocol::Compression::Disable;
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/// A queue with internal logs that will be passed to client. It must be
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/// destroyed after input/output blocks, because they may contain other
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/// threads that use this queue.
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InternalTextLogsQueuePtr logs_queue;
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BlockOutputStreamPtr logs_block_out;
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/// From where to read data for INSERT.
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std::shared_ptr<ReadBuffer> maybe_compressed_in;
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BlockInputStreamPtr block_in;
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/// Where to write result data.
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std::shared_ptr<WriteBuffer> maybe_compressed_out;
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BlockOutputStreamPtr block_out;
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/// Query text.
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String query;
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/// Streams of blocks, that are processing the query.
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BlockIO io;
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/// Is request cancelled
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bool is_cancelled = false;
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bool is_connection_closed = false;
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/// empty or not
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bool is_empty = true;
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/// Data was sent.
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bool sent_all_data = false;
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/// Request requires data from the client (INSERT, but not INSERT SELECT).
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bool need_receive_data_for_insert = false;
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/// Temporary tables read
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bool temporary_tables_read = false;
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/// A state got uuids to exclude from a query
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bool part_uuids = false;
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/// Request requires data from client for function input()
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bool need_receive_data_for_input = false;
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/// temporary place for incoming data block for input()
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Block block_for_input;
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/// sample block from StorageInput
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Block input_header;
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/// To output progress, the difference after the previous sending of progress.
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Progress progress;
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/// Timeouts setter for current query
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std::unique_ptr<TimeoutSetter> timeout_setter;
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void reset()
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{
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*this = QueryState();
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}
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bool empty() const
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{
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return is_empty;
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}
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};
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struct LastBlockInputParameters
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{
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Protocol::Compression compression = Protocol::Compression::Disable;
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Block header;
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};
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class TCPHandler : public Poco::Net::TCPServerConnection
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{
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public:
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/** parse_proxy_protocol_ - if true, expect and parse the header of PROXY protocol in every connection
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* and set the information about forwarded address accordingly.
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* See https://github.com/wolfeidau/proxyv2/blob/master/docs/proxy-protocol.txt
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*
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* Note: immediate IP address is always used for access control (accept-list of IP networks),
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* because it allows to check the IP ranges of the trusted proxy.
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* Proxy-forwarded (original client) IP address is used for quota accounting if quota is keyed by forwarded IP.
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*/
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TCPHandler(IServer & server_, const Poco::Net::StreamSocket & socket_, bool parse_proxy_protocol_, std::string server_display_name_);
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~TCPHandler() override;
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void run() override;
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/// This method is called right before the query execution.
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virtual void customizeContext(ContextMutablePtr /*context*/) {}
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private:
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IServer & server;
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bool parse_proxy_protocol = false;
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Poco::Logger * log;
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String client_name;
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UInt64 client_version_major = 0;
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UInt64 client_version_minor = 0;
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UInt64 client_version_patch = 0;
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UInt64 client_tcp_protocol_version = 0;
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ContextMutablePtr connection_context;
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ContextMutablePtr query_context;
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size_t unknown_packet_in_send_data = 0;
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/// Streams for reading/writing from/to client connection socket.
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std::shared_ptr<ReadBuffer> in;
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std::shared_ptr<WriteBuffer> out;
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/// Time after the last check to stop the request and send the progress.
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Stopwatch after_check_cancelled;
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Stopwatch after_send_progress;
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String default_database;
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/// For inter-server secret (remote_server.*.secret)
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String salt;
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String cluster;
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String cluster_secret;
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std::mutex task_callback_mutex;
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/// At the moment, only one ongoing query in the connection is supported at a time.
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QueryState state;
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/// Last block input parameters are saved to be able to receive unexpected data packet sent after exception.
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LastBlockInputParameters last_block_in;
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CurrentMetrics::Increment metric_increment{CurrentMetrics::TCPConnection};
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/// It is the name of the server that will be sent to the client.
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String server_display_name;
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void runImpl();
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bool receiveProxyHeader();
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void receiveHello();
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bool receivePacket();
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void receiveQuery();
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void receiveIgnoredPartUUIDs();
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String receiveReadTaskResponseAssumeLocked();
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bool receiveData(bool scalar);
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bool readDataNext(size_t poll_interval, time_t receive_timeout);
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void readData(const Settings & connection_settings);
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void receiveClusterNameAndSalt();
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std::tuple<size_t, int> getReadTimeouts(const Settings & connection_settings);
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[[noreturn]] void receiveUnexpectedData();
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[[noreturn]] void receiveUnexpectedQuery();
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[[noreturn]] void receiveUnexpectedHello();
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[[noreturn]] void receiveUnexpectedTablesStatusRequest();
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/// Process INSERT query
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void processInsertQuery(const Settings & connection_settings);
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/// Process a request that does not require the receiving of data blocks from the client
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void processOrdinaryQuery();
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void processOrdinaryQueryWithProcessors();
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void processTablesStatusRequest();
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void sendHello();
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void sendData(const Block & block); /// Write a block to the network.
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void sendLogData(const Block & block);
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void sendTableColumns(const ColumnsDescription & columns);
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void sendException(const Exception & e, bool with_stack_trace);
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void sendProgress();
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void sendLogs();
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void sendEndOfStream();
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void sendPartUUIDs();
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void sendReadTaskRequestAssumeLocked();
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void sendProfileInfo(const BlockStreamProfileInfo & info);
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void sendTotals(const Block & totals);
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void sendExtremes(const Block & extremes);
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/// Creates state.block_in/block_out for blocks read/write, depending on whether compression is enabled.
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void initBlockInput();
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void initBlockOutput(const Block & block);
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void initLogsBlockOutput(const Block & block);
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bool isQueryCancelled();
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/// This function is called from different threads.
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void updateProgress(const Progress & value);
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};
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}
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