Detailed Description

Base class for WebSocket handler.

Static options:

Inherits all the options from server::handlers::HandlerBase and adds the following ones:

Name	Description	Default value
log-level	overrides log level for this handle	<no override>
status-codes-log-level	map of "status": log_level items to override span log level for specific status codes	{}
max-remote-payload	max remote payload size	65536
fragment-size	max output fragment size	65536

Example usage:

#include <userver/components/minimal_server_component_list.hpp>
#include <userver/server/websocket/websocket_handler.hpp>
#include <userver/utils/daemon_run.hpp>
 
namespace samples::websocket {
 
class WebsocketsHandler final : public server::websocket::WebsocketHandlerBase {
 public:
  // `kName` is used as the component name in static config
  static constexpr std::string_view kName = "websocket-handler";
 
  // Component is valid after construction and is able to accept requests
  using WebsocketHandlerBase::WebsocketHandlerBase;
 
  void Handle(server::websocket::WebSocketConnection& chat,
              server::request::RequestContext&) const override {
    server::websocket::Message message;
    while (!engine::current_task::ShouldCancel()) {
      chat.Recv(message);
      if (message.close_status) break;
      chat.Send(std::move(message));
    }
    if (message.close_status) chat.Close(*message.close_status);
  }
};
 
}  // namespace samples::websocket

Examples: samples/websocket_service/websocket_service.cpp.

Definition at line 37 of file websocket_handler.hpp.

Inheritance diagram for server::websocket::WebsocketHandlerBase:

Collaboration diagram for server::websocket::WebsocketHandlerBase:

Public Member Functions
	WebsocketHandlerBase (const components::ComponentConfig &, const components::ComponentContext &)

virtual void	Handle (WebSocketConnection &websocket, server::request::RequestContext &) const =0
	Websocket handler code belongs here.

virtual bool	HandleHandshake (const server::http::HttpRequest &, server::http::HttpResponse &, server::request::RequestContext &) const
	If any code is required for handshake validation, it goes here.

Public Member Functions inherited from server::handlers::HttpHandlerBase
	HttpHandlerBase (const components::ComponentConfig &config, const components::ComponentContext &component_context, bool is_monitor=false)

void	HandleRequest (request::RequestBase &request, request::RequestContext &context) const override

void	ReportMalformedRequest (request::RequestBase &request) const final

virtual const std::string &	HandlerName () const

const std::vector< http::HttpMethod > &	GetAllowedMethods () const

virtual logging::Level	GetLogLevelForResponseStatus (http::HttpStatus status) const

virtual FormattedErrorData	GetFormattedExternalErrorBody (const CustomHandlerException &exc) const

std::string	GetResponseDataForLoggingChecked (const http::HttpRequest &request, request::RequestContext &context, const std::string &response_data) const

void	HandleCustomHandlerException (const http::HttpRequest &request, const CustomHandlerException &ex) const

void	HandleUnknownException (const http::HttpRequest &request, const std::exception &ex) const

void	LogUnknownException (const std::exception &ex) const
	Helper function to log an unknown exception.

const std::optional< logging::Level > &	GetLogLevel () const
	Returns the default log level for the handler.

Public Member Functions inherited from server::handlers::HandlerBase
	HandlerBase (const components::ComponentConfig &config, const components::ComponentContext &component_context, bool is_monitor=false)

bool	IsMonitor () const
	Returns whether this is a monitoring handler.

const HandlerConfig &	GetConfig () const
	Returns handler config.

Public Member Functions inherited from components::LoggableComponentBase
	LoggableComponentBase (const ComponentConfig &, const ComponentContext &)

	LoggableComponentBase (LoggableComponentBase &&)=delete

	LoggableComponentBase (const LoggableComponentBase &)=delete

	~LoggableComponentBase () override=default

ComponentHealth	GetComponentHealth () const override

void	OnLoadingCancelled () override

void	OnAllComponentsLoaded () override

void	OnAllComponentsAreStopping () override

Additional Inherited Members
Static Public Member Functions inherited from server::handlers::HttpHandlerBase
static yaml_config::Schema	GetStaticConfigSchema ()

Static Public Member Functions inherited from server::handlers::HandlerBase
static yaml_config::Schema	GetStaticConfigSchema ()

Static Public Member Functions inherited from components::LoggableComponentBase
static yaml_config::Schema	GetStaticConfigSchema ()

Protected Types inherited from server::handlers::HandlerBase
using	HandlerErrorCode = handlers::HandlerErrorCode

using	InternalMessage = handlers::InternalMessage

using	ExternalBody = handlers::ExternalBody

using	ClientError = handlers::ClientError

using	InternalServerError = handlers::InternalServerError

Protected Member Functions inherited from server::handlers::HttpHandlerBase
void	ThrowUnsupportedHttpMethod (const http::HttpRequest &request) const

virtual void	OnRequestCompleteThrow (const http::HttpRequest &, request::RequestContext &) const

virtual void	HandleStreamRequest (const server::http::HttpRequest &, server::request::RequestContext &, server::http::ResponseBodyStream &) const

virtual bool	IsStreamed () const

virtual bool	IsMethodStatisticIncluded () const

virtual bool	NeedCheckAuth () const

virtual std::string	GetRequestBodyForLogging (const http::HttpRequest &request, request::RequestContext &context, const std::string &request_body) const
	Override it if you need a custom request body logging.

virtual std::string	GetResponseDataForLogging (const http::HttpRequest &request, request::RequestContext &context, const std::string &response_data) const
	Override it if you need a custom response data logging.

virtual void	ParseRequestData (const http::HttpRequest &, request::RequestContext &) const

virtual std::string	GetMetaType (const http::HttpRequest &) const

Member Function Documentation

◆ HandleHandshake()

virtual bool server::websocket::WebsocketHandlerBase::HandleHandshake	(	const server::http::HttpRequest &	,
		server::http::HttpResponse &	,
		server::request::RequestContext &	) const

inlinevirtual

If any code is required for handshake validation, it goes here.

Definition at line 48 of file websocket_handler.hpp.

The documentation for this class was generated from the following file:

userver/server/websocket/websocket_handler.hpp

Table of Contents

Detailed Description

Static options:

Example usage:

Public Member Functions

Additional Inherited Members

Member Function Documentation

◆ HandleHandshake()