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-rw-r--r--vendor/google.golang.org/grpc/metadata/metadata.go89
1 files changed, 81 insertions, 8 deletions
diff --git a/vendor/google.golang.org/grpc/metadata/metadata.go b/vendor/google.golang.org/grpc/metadata/metadata.go
index ccfea5d..bd2eaf4 100644
--- a/vendor/google.golang.org/grpc/metadata/metadata.go
+++ b/vendor/google.golang.org/grpc/metadata/metadata.go
@@ -17,7 +17,8 @@
*/
// Package metadata define the structure of the metadata supported by gRPC library.
-// Please refer to https://grpc.io/docs/guides/wire.html for more information about custom-metadata.
+// Please refer to https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md
+// for more information about custom-metadata.
package metadata // import "google.golang.org/grpc/metadata"
import (
@@ -27,7 +28,9 @@ import (
"golang.org/x/net/context"
)
-// DecodeKeyValue returns k, v, nil. It is deprecated and should not be used.
+// DecodeKeyValue returns k, v, nil.
+//
+// Deprecated: use k and v directly instead.
func DecodeKeyValue(k, v string) (string, string, error) {
return k, v, nil
}
@@ -94,6 +97,30 @@ func (md MD) Copy() MD {
return Join(md)
}
+// Get obtains the values for a given key.
+func (md MD) Get(k string) []string {
+ k = strings.ToLower(k)
+ return md[k]
+}
+
+// Set sets the value of a given key with a slice of values.
+func (md MD) Set(k string, vals ...string) {
+ if len(vals) == 0 {
+ return
+ }
+ k = strings.ToLower(k)
+ md[k] = vals
+}
+
+// Append adds the values to key k, not overwriting what was already stored at that key.
+func (md MD) Append(k string, vals ...string) {
+ if len(vals) == 0 {
+ return
+ }
+ k = strings.ToLower(k)
+ md[k] = append(md[k], vals...)
+}
+
// Join joins any number of mds into a single MD.
// The order of values for each key is determined by the order in which
// the mds containing those values are presented to Join.
@@ -115,9 +142,26 @@ func NewIncomingContext(ctx context.Context, md MD) context.Context {
return context.WithValue(ctx, mdIncomingKey{}, md)
}
-// NewOutgoingContext creates a new context with outgoing md attached.
+// NewOutgoingContext creates a new context with outgoing md attached. If used
+// in conjunction with AppendToOutgoingContext, NewOutgoingContext will
+// overwrite any previously-appended metadata.
func NewOutgoingContext(ctx context.Context, md MD) context.Context {
- return context.WithValue(ctx, mdOutgoingKey{}, md)
+ return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md})
+}
+
+// AppendToOutgoingContext returns a new context with the provided kv merged
+// with any existing metadata in the context. Please refer to the
+// documentation of Pairs for a description of kv.
+func AppendToOutgoingContext(ctx context.Context, kv ...string) context.Context {
+ if len(kv)%2 == 1 {
+ panic(fmt.Sprintf("metadata: AppendToOutgoingContext got an odd number of input pairs for metadata: %d", len(kv)))
+ }
+ md, _ := ctx.Value(mdOutgoingKey{}).(rawMD)
+ added := make([][]string, len(md.added)+1)
+ copy(added, md.added)
+ added[len(added)-1] = make([]string, len(kv))
+ copy(added[len(added)-1], kv)
+ return context.WithValue(ctx, mdOutgoingKey{}, rawMD{md: md.md, added: added})
}
// FromIncomingContext returns the incoming metadata in ctx if it exists. The
@@ -128,10 +172,39 @@ func FromIncomingContext(ctx context.Context) (md MD, ok bool) {
return
}
+// FromOutgoingContextRaw returns the un-merged, intermediary contents
+// of rawMD. Remember to perform strings.ToLower on the keys. The returned
+// MD should not be modified. Writing to it may cause races. Modification
+// should be made to copies of the returned MD.
+//
+// This is intended for gRPC-internal use ONLY.
+func FromOutgoingContextRaw(ctx context.Context) (MD, [][]string, bool) {
+ raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
+ if !ok {
+ return nil, nil, false
+ }
+
+ return raw.md, raw.added, true
+}
+
// FromOutgoingContext returns the outgoing metadata in ctx if it exists. The
// returned MD should not be modified. Writing to it may cause races.
-// Modification should be made to the copies of the returned MD.
-func FromOutgoingContext(ctx context.Context) (md MD, ok bool) {
- md, ok = ctx.Value(mdOutgoingKey{}).(MD)
- return
+// Modification should be made to copies of the returned MD.
+func FromOutgoingContext(ctx context.Context) (MD, bool) {
+ raw, ok := ctx.Value(mdOutgoingKey{}).(rawMD)
+ if !ok {
+ return nil, false
+ }
+
+ mds := make([]MD, 0, len(raw.added)+1)
+ mds = append(mds, raw.md)
+ for _, vv := range raw.added {
+ mds = append(mds, Pairs(vv...))
+ }
+ return Join(mds...), ok
+}
+
+type rawMD struct {
+ md MD
+ added [][]string
}