#include <userver/server/handlers/dns_client_control.hpp>

Detailed Description

Handlers that controls the DNS client.

The component has no service configuration except the common handler options.

Static configuration example:

# yaml
    handler-dns-client-control:
        path: /service/dnsclient/{command}
        method: POST
        task_processor: monitor-task-processor

Schema

Set an URL path argument command to one of the following values:

reload_hosts - to reload hosts file cache
flush_cache - to remove network cache records for name specified as a query parameter
flush_cache_full - to completely wipe network cache

Definition at line 37 of file dns_client_control.hpp.

Inheritance diagram for server::handlers::DnsClientControl:

Collaboration diagram for server::handlers::DnsClientControl:

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

std::string	HandleRequestThrow (const http::HttpRequest &, request::RequestContext &) const override

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

Static Public Member Functions
static yaml_config::Schema	GetStaticConfigSchema ()

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 ()

Static Public Attributes
static constexpr std::string_view	kName = "handler-dns-client-control"
	The default name of server::handlers::DnsClientControl.

Additional Inherited Members
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

◆ HandleRequestThrow()

std::string server::handlers::DnsClientControl::HandleRequestThrow	(	const http::HttpRequest &	request,
		request::RequestContext &	context ) const

overridevirtual

The core method for HTTP request handling. request arg contains HTTP headers, full body, etc. The method should return response body.

Note: It is used only if IsStreamed() returned false.

Reimplemented from server::handlers::HttpHandlerBase.

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

userver/server/handlers/dns_client_control.hpp

Detailed Description

Static configuration example:

Schema

Public Member Functions

Static Public Member Functions

Static Public Attributes

Additional Inherited Members

Member Function Documentation

◆ HandleRequestThrow()