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fix the issue that appearing in initializing go-coco project (#2)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| package xgrpc | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "net/http" | ||
| "strings" | ||
|
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| "github.com/grpc-ecosystem/grpc-gateway/v2/runtime" | ||
| xLogger "github.com/iftechio/go-coco/utils/logger" | ||
| "github.com/labstack/echo/v4" | ||
| "github.com/pkg/errors" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/status" | ||
| "google.golang.org/protobuf/encoding/protojson" | ||
| "google.golang.org/protobuf/runtime/protoimpl" | ||
| "google.golang.org/protobuf/types/known/structpb" | ||
| ) | ||
|
|
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| type CustomError struct { | ||
| state protoimpl.MessageState | ||
| sizeCache protoimpl.SizeCache | ||
| unknownFields protoimpl.UnknownFields | ||
|
|
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| Message string `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"` | ||
| Toast *string `protobuf:"bytes,2,opt,name=toast,proto3,oneof" json:"toast,omitempty"` | ||
| // E Code | ||
| Code *string `protobuf:"bytes,3,opt,name=code,proto3,oneof" json:"code,omitempty"` | ||
| Error *string `protobuf:"bytes,4,opt,name=error,proto3,oneof" json:"error,omitempty"` | ||
| Data *structpb.Value `protobuf:"bytes,5,opt,name=data,proto3" json:"data,omitempty"` | ||
| } | ||
|
|
||
| func GatewayMiddleware( | ||
| register func( | ||
| ctx context.Context, | ||
| mux *runtime.ServeMux, | ||
| endpoint string, | ||
| opts []grpc.DialOption, | ||
| ) (err error), | ||
| endpoint string, | ||
| pattern string, | ||
| ) echo.MiddlewareFunc { | ||
| gateway := runtime.NewServeMux( | ||
| runtime.WithIncomingHeaderMatcher(func(s string) (string, bool) { | ||
| switch s { | ||
| case "Connection": | ||
| return "", false | ||
| default: | ||
| return s, true | ||
| } | ||
| }), | ||
| runtime.WithErrorHandler(gatewayErrorHandler), | ||
| runtime.WithMarshalerOption(runtime.MIMEWildcard, &runtime.HTTPBodyMarshaler{ | ||
| Marshaler: &runtime.JSONPb{ | ||
| MarshalOptions: protojson.MarshalOptions{ | ||
| UseProtoNames: true, | ||
| EmitUnpopulated: true, | ||
| }, | ||
| UnmarshalOptions: protojson.UnmarshalOptions{ | ||
| DiscardUnknown: true, | ||
| }, | ||
| }, | ||
| }), | ||
| ) | ||
| if err := register( | ||
| context.Background(), gateway, endpoint, []grpc.DialOption{grpc.WithInsecure()}, | ||
| ); err != nil { | ||
| panic(err) | ||
| } | ||
| return func(next echo.HandlerFunc) echo.HandlerFunc { | ||
| return func(c echo.Context) error { | ||
| if strings.HasPrefix(c.Path(), pattern) { | ||
| gateway.ServeHTTP(c.Response(), c.Request()) | ||
| return nil | ||
| } | ||
| return next(c) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // gatewayErrorHandler 自定义 error handler | ||
| // 覆盖 runtime.DefaultErrorHandle 默认的错误处理，实现自定义的 error payload | ||
| func gatewayErrorHandler( | ||
| ctx context.Context, | ||
| mux *runtime.ServeMux, | ||
| marshaler runtime.Marshaler, | ||
| w http.ResponseWriter, | ||
| r *http.Request, | ||
| err error, | ||
| ) { | ||
| var statusCode int | ||
| var customStatus *runtime.HTTPStatusError | ||
| if errors.As(err, &customStatus) { | ||
| err = customStatus.Err | ||
| statusCode = customStatus.HTTPStatus | ||
| } | ||
|
|
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| s := status.Convert(err) | ||
|
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| pb := &CustomError{ | ||
| Message: s.Message(), | ||
| } | ||
|
|
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| for _, d := range s.Details() { | ||
| m, ok := d.(*CustomError) | ||
| if !ok { | ||
| continue | ||
| } | ||
| pb.Message = m.Message | ||
| pb.Error = m.Toast | ||
| pb.Code = m.Code | ||
| pb.Data = m.Data | ||
| } | ||
|
|
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| w.Header().Del("Trailer") | ||
| w.Header().Del("Transfer-Encoding") | ||
| w.Header().Set("Content-Type", marshaler.ContentType(pb)) | ||
|
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| buf, merr := marshaler.Marshal(pb) | ||
| if merr != nil { | ||
| w.WriteHeader(http.StatusInternalServerError) | ||
| xLogger.F(ctx).Errorf("Failed to marshal error message %q: %v", s, merr) | ||
| return | ||
| } | ||
|
|
||
| if md, ok := runtime.ServerMetadataFromContext(ctx); ok { | ||
| for k, vs := range md.HeaderMD { | ||
| h := fmt.Sprintf("%s%s", runtime.MetadataHeaderPrefix, k) | ||
| for _, v := range vs { | ||
| w.Header().Add(h, v) | ||
| } | ||
| } | ||
| } | ||
|
|
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| if statusCode == 0 { | ||
| statusCode = runtime.HTTPStatusFromCode(s.Code()) | ||
| } | ||
|
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| w.WriteHeader(statusCode) | ||
| if _, err := w.Write(buf); err != nil { | ||
| xLogger.F(ctx).Errorf("Failed to write response: %v", err) | ||
| } | ||
| } |
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