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95 lines
2.5 KiB
95 lines
2.5 KiB
package transport
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import (
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"context"
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"net/url"
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// init encoding
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_ "github.com/go-kratos/kratos/v2/encoding/form"
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_ "github.com/go-kratos/kratos/v2/encoding/json"
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_ "github.com/go-kratos/kratos/v2/encoding/proto"
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_ "github.com/go-kratos/kratos/v2/encoding/xml"
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_ "github.com/go-kratos/kratos/v2/encoding/yaml"
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)
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// Server is transport server.
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type Server interface {
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Start(context.Context) error
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Stop(context.Context) error
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}
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// Endpointer is registry endpoint.
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type Endpointer interface {
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Endpoint() (*url.URL, error)
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}
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// Header is the storage medium used by a Header.
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type Header interface {
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Get(key string) string
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Set(key string, value string)
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Add(key string, value string)
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Keys() []string
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Values(key string) []string
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}
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// Transporter is transport context value interface.
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type Transporter interface {
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// Kind transporter
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// grpc
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// http
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Kind() Kind
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// Endpoint return server or client endpoint
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// Server Transport: grpc://127.0.0.1:9000
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// Client Transport: discovery:///provider-demo
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Endpoint() string
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// Operation Service full method selector generated by protobuf
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// example: /helloworld.Greeter/SayHello
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Operation() string
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// RequestHeader return transport request header
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// http: http.Header
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// grpc: metadata.MD
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RequestHeader() Header
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// ReplyHeader return transport reply/response header
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// only valid for server transport
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// http: http.Header
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// grpc: metadata.MD
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ReplyHeader() Header
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}
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// Kind defines the type of Transport
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type Kind string
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func (k Kind) String() string { return string(k) }
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// Defines a set of transport kind
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const (
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KindGRPC Kind = "grpc"
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KindHTTP Kind = "http"
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)
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type (
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serverTransportKey struct{}
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clientTransportKey struct{}
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)
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// NewServerContext returns a new Context that carries value.
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func NewServerContext(ctx context.Context, tr Transporter) context.Context {
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return context.WithValue(ctx, serverTransportKey{}, tr)
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}
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// FromServerContext returns the Transport value stored in ctx, if any.
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func FromServerContext(ctx context.Context) (tr Transporter, ok bool) {
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tr, ok = ctx.Value(serverTransportKey{}).(Transporter)
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return
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}
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// NewClientContext returns a new Context that carries value.
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func NewClientContext(ctx context.Context, tr Transporter) context.Context {
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return context.WithValue(ctx, clientTransportKey{}, tr)
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}
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// FromClientContext returns the Transport value stored in ctx, if any.
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func FromClientContext(ctx context.Context) (tr Transporter, ok bool) {
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tr, ok = ctx.Value(clientTransportKey{}).(Transporter)
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return
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}
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