interceptor

package
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Published: Jun 27, 2023 License: MIT Imports: 22 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source
var (
	// ClientUnaryTracer intercepts client unary connections
	ClientUnaryTracer = grpc.WithUnaryInterceptor(
		otelgrpc.UnaryClientInterceptor())

	// ClientStreamTracer intercepts client stream connections
	ClientStreamTracer = grpc.WithStreamInterceptor(
		otelgrpc.StreamClientInterceptor())
)
View Source
var Defaulter = &DefaultHandler{}

Defaulter is the interceptor that sets the default values of each input and output parameter

View Source
var Logger = &LogHandler{}

Logger is the log interceptor

View Source
var Recoverer = &RecoveryHandler{}

Recoverer is the recovery interceptor

View Source
var Session = &SessionHandler{}

Session injects the session into the request interceptor

View Source
var Tracer = &TraceHandler{}

Tracer is the interceptor that sets the default values of each input and output parameter

View Source
var Transformer = &TransformHandler{
	Molder: mold.New(),
}

Transformer is the interceptor that transforms the values of each input and output parameter

View Source
var Validator = &ValidationHandler{
	Validator:  validate.New(),
	Translator: translator.New(en.New()),
}

Validator is the validation interceptor

Functions

func ExtractValidationFieldName

func ExtractValidationFieldName(field reflect.StructField) string

ExtractValidationFieldName returns the validated field name

Types

type DefaultHandler

type DefaultHandler struct{}

DefaultHandler represents a defaulter

func (*DefaultHandler) Stream

func (h *DefaultHandler) Stream(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error

Stream does not validate the stream

func (*DefaultHandler) Unary

func (h *DefaultHandler) Unary(ctx context.Context, input interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error)

Unary does unary validation

type LogHandler

type LogHandler struct{}

LogHandler represents a logger

func (*LogHandler) Stream

func (h *LogHandler) Stream(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error

Stream does stream logging

func (*LogHandler) Unary

func (h *LogHandler) Unary(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error)

Unary does unary logging

type Loggable

type Loggable interface {
	LogLevel() log.Level
}

Loggable allows a handler to control it's log level

type RecoveryHandler

type RecoveryHandler struct {
	Handler RecoveryHandlerFuncContext
}

RecoveryHandler represents an interceptor that recovers from panic

func (*RecoveryHandler) Stream

func (h *RecoveryHandler) Stream(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) (err error)

Stream does stream logging

func (*RecoveryHandler) Unary

func (h *RecoveryHandler) Unary(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (_ interface{}, err error)

Unary does unary logging

type RecoveryHandlerFuncContext

type RecoveryHandlerFuncContext func(ctx context.Context, p interface{}) (err error)

RecoveryHandlerFuncContext is a function that recovers from the panic `p` by returning an `error`. The context can be used to extract request scoped metadata and context values.

type ServerStream

type ServerStream struct {
	Ctx    context.Context
	Stream grpc.ServerStream
}

ServerStream defines the server-side behavior of a streaming RPC.

All errors returned from ServerStream methods are compatible with the status package.

func (*ServerStream) Context

func (l *ServerStream) Context() context.Context

Context returns the context for this stream.

func (*ServerStream) RecvMsg

func (l *ServerStream) RecvMsg(m interface{}) error

RecvMsg blocks until it receives a message into m or the stream is done. It returns io.EOF when the client has performed a CloseSend. On any non-EOF error, the stream is aborted and the error contains the RPC status.

It is safe to have a goroutine calling SendMsg and another goroutine calling RecvMsg on the same stream at the same time, but it is not safe to call RecvMsg on the same stream in different goroutines.

func (*ServerStream) SendHeader

func (l *ServerStream) SendHeader(m metadata.MD) error

SendHeader sends the header metadata. The provided md and headers set by SetHeader() will be sent. It fails if called multiple times.

func (*ServerStream) SendMsg

func (l *ServerStream) SendMsg(m interface{}) error

SendMsg sends a message. On error, SendMsg aborts the stream and the error is returned directly.

SendMsg blocks until:

  • There is sufficient flow control to schedule m with the transport, or
  • The stream is done, or
  • The stream breaks.

SendMsg does not wait until the message is received by the client. An untimely stream closure may result in lost messages.

It is safe to have a goroutine calling SendMsg and another goroutine calling RecvMsg on the same stream at the same time, but it is not safe to call SendMsg on the same stream in different goroutines.

func (*ServerStream) SetHeader

func (l *ServerStream) SetHeader(m metadata.MD) error

SetHeader sets the header metadata. It may be called multiple times. When call multiple times, all the provided metadata will be merged. All the metadata will be sent out when one of the following happens:

  • ServerStream.SendHeader() is called;
  • The first response is sent out;
  • An RPC status is sent out (error or success).

func (*ServerStream) SetTrailer

func (l *ServerStream) SetTrailer(m metadata.MD)

SetTrailer sets the trailer metadata which will be sent with the RPC status. When called more than once, all the provided metadata will be merged.

type SessionHandler

type SessionHandler struct{}

SessionHandler represents an interceptor that recovers from panic

func (*SessionHandler) Stream

func (h *SessionHandler) Stream(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error

Stream does stream logging

func (*SessionHandler) Unary

func (h *SessionHandler) Unary(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error)

Unary does unary logging

type TraceHandler

type TraceHandler struct{}

TraceHandler represents a defaulter

func (*TraceHandler) Stream

func (h *TraceHandler) Stream(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error

Stream does not validate the stream

func (*TraceHandler) Unary

func (h *TraceHandler) Unary(ctx context.Context, input interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error)

Unary does unary validation

type TransformHandler

type TransformHandler struct {
	Molder *mold.Transformer
}

TransformHandler represents a mold

func (*TransformHandler) Stream

func (h *TransformHandler) Stream(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error

Stream does not validate the stream

func (*TransformHandler) Unary

func (h *TransformHandler) Unary(ctx context.Context, input interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error)

Unary does unary validation

type Validatable

type Validatable interface {
	Validate() error
}

Validatable represents a validatable type

type ValidationHandler

type ValidationHandler struct {
	Validator  *validate.Validate
	Translator *translator.UniversalTranslator
}

ValidationHandler represents a logger

func (*ValidationHandler) RegisterValidationCtx

func (h *ValidationHandler) RegisterValidationCtx(tag string, fn validate.FuncCtx, callValidationEvenIfNull ...bool) error

RegisterValidationCtx does the same as RegisterValidation on accepts a FuncCtx validation allowing context.Context validation support.

func (*ValidationHandler) Stream

func (h *ValidationHandler) Stream(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error

Stream does not validate the stream

func (*ValidationHandler) Unary

func (h *ValidationHandler) Unary(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (_ interface{}, err error)

Unary does unary validation

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