/
requestid.go
62 lines (48 loc) · 1.12 KB
/
requestid.go
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package xrequestid
import (
"fmt"
"github.com/renstrom/shortuuid"
"golang.org/x/net/context"
"google.golang.org/grpc/metadata"
)
// DefaultXRequestIDKey is metadata key name for request ID
var DefaultXRequestIDKey = "x-request-id"
func HandleRequestID(ctx context.Context, validator requestIDValidator) string {
md, ok := metadata.FromContext(ctx)
if !ok {
return newRequestID()
}
header, ok := md[DefaultXRequestIDKey]
if !ok || len(header) == 0 {
return newRequestID()
}
requestID := header[0]
if requestID == "" {
return newRequestID()
}
if !validator(requestID) {
return newRequestID()
}
return requestID
}
func HandleRequestIDChain(ctx context.Context, validator requestIDValidator) string {
md, ok := metadata.FromContext(ctx)
if !ok {
return newRequestID()
}
header, ok := md[DefaultXRequestIDKey]
if !ok || len(header) == 0 {
return newRequestID()
}
requestID := header[0]
if requestID == "" {
return newRequestID()
}
if !validator(requestID) {
return newRequestID()
}
return fmt.Sprintf("%s,%s", requestID, newRequestID())
}
func newRequestID() string {
return shortuuid.New()
}