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auth.go
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auth.go
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package grpcex
import (
"context"
"google.golang.org/grpc"
"strings"
"google.golang.org/grpc/metadata"
)
const tokenAuthHeader = "authorization"
const tokenAuthPrefix = "Bearer "
type TokenAuth struct {
token string
}
func (t TokenAuth) GetRequestMetadata(ctx context.Context, in ...string) (map[string]string, error) {
return map[string]string{
tokenAuthHeader: tokenAuthPrefix + t.token,
}, nil
}
func (TokenAuth) RequireTransportSecurity() bool {
return false
}
func NewTokenAuth(token string) *TokenAuth {
return &TokenAuth{
token: token,
}
}
func WithAuthToken(token string) grpc.CallOption {
return grpc.PerRPCCredentials(NewTokenAuth(token))
}
func GetAuthToken(ctx context.Context) (token string) {
meta, ok := metadata.FromIncomingContext(ctx)
if !ok {
return
}
authes := meta.Get(tokenAuthHeader)
if len(authes) > 0 {
auth := authes[0]
if strings.HasPrefix(auth, tokenAuthPrefix) {
token = auth[len(tokenAuthPrefix):]
}
}
return
}