Documentation ¶
Index ¶
- func GetSingle(ctx context.Context, keyName string) (string, bool)
- func SetSingle(ctx context.Context, keyName string, keyValue string) context.Context
- type NiceMD
- func (m NiceMD) Add(key string, value string) NiceMD
- func (m NiceMD) Clone(copiedKeys ...string) NiceMD
- func (m NiceMD) Del(key string) NiceMD
- func (m NiceMD) Get(key string) string
- func (m NiceMD) Set(key string, value string) NiceMD
- func (m NiceMD) ToIncoming(ctx context.Context) context.Context
- func (m NiceMD) ToOutgoing(ctx context.Context) context.Context
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func GetSingle ¶
GetSingle extracts a single-value metadata key from Context. First return is the value of the key, followed by a bool indicator. The bool indicator being false means the string should be discarded. It can be false if the context has no metadata at all, the key in metadata doesn't exist or there are multiple values. Deprecated, use NiceMD.Get.
Types ¶
type NiceMD ¶
NiceMD is a convenience wrapper definiting extra functions on the metadata.
func ExtractIncoming ¶
ExtractIncoming extracts an inbound metadata from the server-side context.
This function always returns a NiceMD wrapper of the metadata.MD, in case the context doesn't have metadata it returns a new empty NiceMD.
func ExtractOutgoing ¶
ExtractOutgoing extracts an outbound metadata from the client-side context.
This function always returns a NiceMD wrapper of the metadata.MD, in case the context doesn't have metadata it returns a new empty NiceMD.
func (NiceMD) Add ¶
Add retrieves a single value from the metadata.
It works analogously to http.Header.Add, as it appends to any existing values associated with key.
The function is binary-key safe.
func (NiceMD) Clone ¶
Clone performs a *deep* copy of the metadata.MD.
You can specify the lower-case copiedKeys to only copy certain whitelisted keys. If no keys are explicitly whitelisted all keys get copied.
func (NiceMD) Get ¶
Get retrieves a single value from the metadata.
It works analogously to http.Header.Get, returning the first value if there are many set. If the value is not set, an empty string is returned.
The function is binary-key safe.
func (NiceMD) Set ¶
Set sets the given value in a metadata.
It works analogously to http.Header.Set, overwriting all previous metadata values.
The function is binary-key safe.
func (NiceMD) ToIncoming ¶
ToIncoming sets the given NiceMD as a server-side context for dispatching.
This is mostly useful in ServerInterceptors..