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interceptor.request_id.go
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/
interceptor.request_id.go
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package v1
import (
"context"
"github.com/google/uuid"
reflect_ "github.com/kaydxh/golang/go/reflect"
"github.com/sirupsen/logrus"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
// RequestIdKey is metadata key name for request ID
var RequestIdKey = "X-Request-ID"
// UnaryServerInterceptorOfRequestId returns a new unary server interceptors with tags in context with request_id.
func UnaryServerInterceptorOfRequestId() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{},
info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
// retrieve requestId from request
id := reflect_.RetrieveId(req, reflect_.FieldNameSessionId)
if id == "" {
//if id is empty, set new uuid to request
id = uuid.NewString()
reflect_.TrySetId(req, reflect_.FieldNameSessionId, id)
}
//set "X-Request-ID" to context
ctx = context.WithValue(ctx, RequestIdKey, id)
resp, err := handler(ctx, req)
// try set requestId to response
reflect_.TrySetId(req, reflect_.FieldNameSessionId, id)
// write RequestId to HTTP Header
if err_ := grpc.SetHeader(ctx, metadata.Pairs(RequestIdKey, id)); err_ != nil {
logrus.WithError(err_).WithField("request_id", id).Warningf("grpc.SendHeader, ignore")
}
return resp, err
}
}