1 files changed, 180 insertions, 0 deletions
diff --git a/vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/errors.go b/vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/errors.go
new file mode 100644
index 000000000..d9e0013c4
--- /dev/null
+++ b/vendor/github.com/grpc-ecosystem/grpc-gateway/v2/runtime/errors.go
@@ -0,0 +1,180 @@
+package runtime
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net/http"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/status"
+)
+
+// ErrorHandlerFunc is the signature used to configure error handling.
+type ErrorHandlerFunc func(context.Context, *ServeMux, Marshaler, http.ResponseWriter, *http.Request, error)
+
+// StreamErrorHandlerFunc is the signature used to configure stream error handling.
+type StreamErrorHandlerFunc func(context.Context, error) *status.Status
+
+// RoutingErrorHandlerFunc is the signature used to configure error handling for routing errors.
+type RoutingErrorHandlerFunc func(context.Context, *ServeMux, Marshaler, http.ResponseWriter, *http.Request, int)
+
+// HTTPStatusError is the error to use when needing to provide a different HTTP status code for an error
+// passed to the DefaultRoutingErrorHandler.
+type HTTPStatusError struct {
+	HTTPStatus int
+	Err        error
+}
+
+func (e *HTTPStatusError) Error() string {
+	return e.Err.Error()
+}
+
+// HTTPStatusFromCode converts a gRPC error code into the corresponding HTTP response status.
+// See: https://github.com/googleapis/googleapis/blob/master/google/rpc/code.proto
+func HTTPStatusFromCode(code codes.Code) int {
+	switch code {
+	case codes.OK:
+		return http.StatusOK
+	case codes.Canceled:
+		return http.StatusRequestTimeout
+	case codes.Unknown:
+		return http.StatusInternalServerError
+	case codes.InvalidArgument:
+		return http.StatusBadRequest
+	case codes.DeadlineExceeded:
+		return http.StatusGatewayTimeout
+	case codes.NotFound:
+		return http.StatusNotFound
+	case codes.AlreadyExists:
+		return http.StatusConflict
+	case codes.PermissionDenied:
+		return http.StatusForbidden
+	case codes.Unauthenticated:
+		return http.StatusUnauthorized
+	case codes.ResourceExhausted:
+		return http.StatusTooManyRequests
+	case codes.FailedPrecondition:
+		// Note, this deliberately doesn't translate to the similarly named '412 Precondition Failed' HTTP response status.
+		return http.StatusBadRequest
+	case codes.Aborted:
+		return http.StatusConflict
+	case codes.OutOfRange:
+		return http.StatusBadRequest
+	case codes.Unimplemented:
+		return http.StatusNotImplemented
+	case codes.Internal:
+		return http.StatusInternalServerError
+	case codes.Unavailable:
+		return http.StatusServiceUnavailable
+	case codes.DataLoss:
+		return http.StatusInternalServerError
+	}
+
+	grpclog.Infof("Unknown gRPC error code: %v", code)
+	return http.StatusInternalServerError
+}
+
+// HTTPError uses the mux-configured error handler.
+func HTTPError(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
+	mux.errorHandler(ctx, mux, marshaler, w, r, err)
+}
+
+// DefaultHTTPErrorHandler is the default error handler.
+// If "err" is a gRPC Status, the function replies with the status code mapped by HTTPStatusFromCode.
+// If "err" is a HTTPStatusError, the function replies with the status code provide by that struct. This is
+// intended to allow passing through of specific statuses via the function set via WithRoutingErrorHandler
+// for the ServeMux constructor to handle edge cases which the standard mappings in HTTPStatusFromCode
+// are insufficient for.
+// If otherwise, it replies with http.StatusInternalServerError.
+//
+// The response body written by this function is a Status message marshaled by the Marshaler.
+func DefaultHTTPErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, err error) {
+	// return Internal when Marshal failed
+	const fallback = `{"code": 13, "message": "failed to marshal error message"}`
+
+	var customStatus *HTTPStatusError
+	if errors.As(err, &customStatus) {
+		err = customStatus.Err
+	}
+
+	s := status.Convert(err)
+	pb := s.Proto()
+
+	w.Header().Del("Trailer")
+	w.Header().Del("Transfer-Encoding")
+
+	contentType := marshaler.ContentType(pb)
+	w.Header().Set("Content-Type", contentType)
+
+	if s.Code() == codes.Unauthenticated {
+		w.Header().Set("WWW-Authenticate", s.Message())
+	}
+
+	buf, merr := marshaler.Marshal(pb)
+	if merr != nil {
+		grpclog.Infof("Failed to marshal error message %q: %v", s, merr)
+		w.WriteHeader(http.StatusInternalServerError)
+		if _, err := io.WriteString(w, fallback); err != nil {
+			grpclog.Infof("Failed to write response: %v", err)
+		}
+		return
+	}
+
+	md, ok := ServerMetadataFromContext(ctx)
+	if !ok {
+		grpclog.Infof("Failed to extract ServerMetadata from context")
+	}
+
+	handleForwardResponseServerMetadata(w, mux, md)
+
+	// RFC 7230 https://tools.ietf.org/html/rfc7230#section-4.1.2
+	// Unless the request includes a TE header field indicating "trailers"
+	// is acceptable, as described in Section 4.3, a server SHOULD NOT
+	// generate trailer fields that it believes are necessary for the user
+	// agent to receive.
+	doForwardTrailers := requestAcceptsTrailers(r)
+
+	if doForwardTrailers {
+		handleForwardResponseTrailerHeader(w, md)
+		w.Header().Set("Transfer-Encoding", "chunked")
+	}
+
+	st := HTTPStatusFromCode(s.Code())
+	if customStatus != nil {
+		st = customStatus.HTTPStatus
+	}
+
+	w.WriteHeader(st)
+	if _, err := w.Write(buf); err != nil {
+		grpclog.Infof("Failed to write response: %v", err)
+	}
+
+	if doForwardTrailers {
+		handleForwardResponseTrailer(w, md)
+	}
+}
+
+func DefaultStreamErrorHandler(_ context.Context, err error) *status.Status {
+	return status.Convert(err)
+}
+
+// DefaultRoutingErrorHandler is our default handler for routing errors.
+// By default http error codes mapped on the following error codes:
+//   NotFound -> grpc.NotFound
+//   StatusBadRequest -> grpc.InvalidArgument
+//   MethodNotAllowed -> grpc.Unimplemented
+//   Other -> grpc.Internal, method is not expecting to be called for anything else
+func DefaultRoutingErrorHandler(ctx context.Context, mux *ServeMux, marshaler Marshaler, w http.ResponseWriter, r *http.Request, httpStatus int) {
+	sterr := status.Error(codes.Internal, "Unexpected routing error")
+	switch httpStatus {
+	case http.StatusBadRequest:
+		sterr = status.Error(codes.InvalidArgument, http.StatusText(httpStatus))
+	case http.StatusMethodNotAllowed:
+		sterr = status.Error(codes.Unimplemented, http.StatusText(httpStatus))
+	case http.StatusNotFound:
+		sterr = status.Error(codes.NotFound, http.StatusText(httpStatus))
+	}
+	mux.errorHandler(ctx, mux, marshaler, w, r, sterr)
+}