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88 lines
2.0 KiB
C++
88 lines
2.0 KiB
C++
#pragma once
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#include <Poco/Net/SocketAddress.h>
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#include <DB/Core/Types.h>
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namespace DB
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{
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class WriteBuffer;
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class ReadBuffer;
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/** Information about client for query.
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* Some fields are passed explicitly from client and some are calculated automatically.
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*
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* Contains info about initial query source, for tracing distributed queries
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* (where one query initiates many other queries).
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*/
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class ClientInfo
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{
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public:
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enum class Interface : UInt8
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{
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TCP = 1,
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HTTP = 2,
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};
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enum class HTTPMethod : UInt8
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{
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UNKNOWN = 0,
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GET = 1,
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POST = 2,
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};
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enum class QueryKind : UInt8
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{
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NO_QUERY = 0, /// Uninitialized object.
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INITIAL_QUERY = 1,
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SECONDARY_QUERY = 2, /// Query that was initiated by another query for distributed query execution.
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};
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QueryKind query_kind = QueryKind::NO_QUERY;
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/// Current values are not serialized, because it is passed separately.
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String current_user;
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String current_query_id;
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Poco::Net::SocketAddress current_address;
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/// When query_kind == INITIAL_QUERY, these values are equal to current.
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String initial_user;
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String initial_query_id;
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Poco::Net::SocketAddress initial_address;
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/// All below are parameters related to initial query.
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Interface interface = Interface::TCP;
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/// For tcp
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String os_user;
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String client_hostname;
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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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unsigned client_revision = 0;
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/// For http
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HTTPMethod http_method = HTTPMethod::UNKNOWN;
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String http_user_agent;
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/// Common
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String quota_key;
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bool empty() const { return query_kind == QueryKind::NO_QUERY; }
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/** Serialization and deserialization.
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* Only values that are not calculated automatically or passed separately are serialized.
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* Revisions are passed to use format that server will understand or client was used.
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*/
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void write(WriteBuffer & out, UInt64 server_revision) const;
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void read(ReadBuffer & in, UInt64 client_revision);
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void fillOSUserHostNameAndVersionInfo();
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};
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}
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