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https://github.com/go-kratos/kratos.git
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add range (#1052)
* add range Co-authored-by: chenzhihui <zhihui_chen@foxmail.com>
This commit is contained in:
parent
8d8cd8c8a8
commit
68e7f4854c
@ -1,46 +0,0 @@
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package metadata
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import (
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"context"
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"fmt"
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)
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type serverMetadataKey struct{}
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// NewServerContext creates a new context with client md attached.
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func NewServerContext(ctx context.Context, md Metadata) context.Context {
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return context.WithValue(ctx, serverMetadataKey{}, md)
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}
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// FromServerContext returns the server metadata in ctx if it exists.
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func FromServerContext(ctx context.Context) (Metadata, bool) {
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md, ok := ctx.Value(serverMetadataKey{}).(Metadata)
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return md, ok
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}
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type clientMetadataKey struct{}
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// NewClientContext creates a new context with client md attached.
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func NewClientContext(ctx context.Context, md Metadata) context.Context {
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return context.WithValue(ctx, clientMetadataKey{}, md)
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}
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// FromClientContext returns the client metadata in ctx if it exists.
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func FromClientContext(ctx context.Context) (Metadata, bool) {
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md, ok := ctx.Value(clientMetadataKey{}).(Metadata)
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return md, ok
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}
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// AppendToClientContext returns a new context with the provided kv merged
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// with any existing metadata in the context.
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func AppendToClientContext(ctx context.Context, kv ...string) context.Context {
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if len(kv)%2 == 1 {
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panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv)))
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}
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md, _ := FromClientContext(ctx)
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md = md.Clone()
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for i := 0; i < len(kv); i += 2 {
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md.Set(kv[i], kv[i+1])
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}
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return NewClientContext(ctx, md)
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}
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@ -1,6 +1,8 @@
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package metadata
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import (
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"context"
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"fmt"
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"strings"
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)
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@ -41,6 +43,16 @@ func (m Metadata) Set(key string, value string) {
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m[k] = value
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}
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// Range iterate over element in metadata.
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func (m Metadata) Range(f func(k, v string) bool) {
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for k, v := range m {
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ret := f(k, v)
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if ret == false {
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break
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}
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}
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}
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// Clone returns a deep copy of Metadata
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func (m Metadata) Clone() Metadata {
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md := Metadata{}
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@ -49,3 +61,53 @@ func (m Metadata) Clone() Metadata {
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}
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return md
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}
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type serverMetadataKey struct{}
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// NewServerContext creates a new context with client md attached.
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func NewServerContext(ctx context.Context, md Metadata) context.Context {
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return context.WithValue(ctx, serverMetadataKey{}, md)
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}
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// FromServerContext returns the server metadata in ctx if it exists.
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func FromServerContext(ctx context.Context) (Metadata, bool) {
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md, ok := ctx.Value(serverMetadataKey{}).(Metadata)
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return md, ok
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}
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type clientMetadataKey struct{}
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// NewClientContext creates a new context with client md attached.
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func NewClientContext(ctx context.Context, md Metadata) context.Context {
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return context.WithValue(ctx, clientMetadataKey{}, md)
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}
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// FromClientContext returns the client metadata in ctx if it exists.
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func FromClientContext(ctx context.Context) (Metadata, bool) {
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md, ok := ctx.Value(clientMetadataKey{}).(Metadata)
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return md, ok
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}
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// AppendToClientContext returns a new context with the provided kv merged
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// with any existing metadata in the context.
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func AppendToClientContext(ctx context.Context, kv ...string) context.Context {
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if len(kv)%2 == 1 {
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panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv)))
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}
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md, _ := FromClientContext(ctx)
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md = md.Clone()
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for i := 0; i < len(kv); i += 2 {
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md.Set(kv[i], kv[i+1])
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}
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return NewClientContext(ctx, md)
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}
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// MergeToClientContext merge new metadata into ctx.
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func MergeToClientContext(ctx context.Context, cmd Metadata) context.Context {
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md, _ := FromClientContext(ctx)
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md = md.Clone()
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for k, v := range cmd {
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md[k] = v
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}
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return NewClientContext(ctx, md)
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}
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@ -17,24 +17,24 @@ type options struct {
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md metadata.Metadata
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}
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// WithConstants is option with constant metadata key value.
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// WithConstants with constant metadata key value.
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func WithConstants(md metadata.Metadata) Option {
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return func(o *options) {
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o.md = md
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}
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}
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// WithPropagatedPrefix is option with global propagated key prefix.
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// WithPropagatedPrefix with propagated key prefix.
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func WithPropagatedPrefix(prefix ...string) Option {
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return func(o *options) {
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o.prefix = prefix
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}
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}
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// Server is middleware client-side metadata.
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// Server is middleware server-side metadata.
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func Server(opts ...Option) middleware.Middleware {
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options := options{
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prefix: []string{"x-md-global-", "x-md-local-"},
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prefix: []string{"x-md-"}, // x-md-global-, x-md-local
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}
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for _, o := range opts {
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o(&options)
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@ -42,11 +42,10 @@ func Server(opts ...Option) middleware.Middleware {
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return func(handler middleware.Handler) middleware.Handler {
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return func(ctx context.Context, req interface{}) (reply interface{}, err error) {
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if tr, ok := transport.FromServerContext(ctx); ok {
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md := metadata.Metadata{}
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md := metadata.New()
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for _, k := range tr.Header().Keys() {
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key := strings.ToLower(k)
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for _, prefix := range options.prefix {
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if strings.HasPrefix(key, prefix) {
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if strings.HasPrefix(strings.ToLower(k), prefix) {
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md.Set(k, tr.Header().Get(k))
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break
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}
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@ -70,6 +69,7 @@ func Client(opts ...Option) middleware.Middleware {
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return func(handler middleware.Handler) middleware.Handler {
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return func(ctx context.Context, req interface{}) (reply interface{}, err error) {
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if tr, ok := transport.FromClientContext(ctx); ok {
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// x-md-local-
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for k, v := range options.md {
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tr.Header().Set(k, v)
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}
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@ -78,6 +78,7 @@ func Client(opts ...Option) middleware.Middleware {
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tr.Header().Set(k, v)
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}
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}
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// x-md-global-
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if md, ok := metadata.FromServerContext(ctx); ok {
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for k, v := range md {
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for _, prefix := range options.prefix {
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