gRPC HTTP body mapping works incorrectly #325
Description
Hi, I've noticed some inconsistency with grpc http transcoding.
Here's how to reproduce it:
- Take example proto schema from google doc (https://cloud.google.com/endpoints/docs/grpc/transcoding#map_a_create_method)
Full schema:
syntax = "proto3";
package shelf;
import "github.com/metaverse/truss/deftree/googlethirdparty/annotations.proto";
service Shelfs {
// Creates a new shelf in the bookstore.
rpc CreateShelf(CreateShelfRequest) returns (Shelf) {
// Client example:
// curl -d '{"theme":"Music"}' http://DOMAIN_NAME/v1/shelves
option (google.api.http) = {
post: "/v1/shelves"
body: "shelf"
};
}
}
// Request message for CreateShelf method.
message CreateShelfRequest {
// The shelf resource to create.
Shelf shelf = 1;
}
// A shelf resource.
message Shelf {
// A unique shelf id.
int64 id = 1;
// A theme of the shelf (fiction, poetry, etc).
string theme = 2;
}- Generate and run server
- Add debug printing of Shelf field to CreateShelf:
func (s shelfsService) CreateShelf(ctx context.Context, in *pb.CreateShelfRequest) (*pb.Shelf, error) {
fmt.Printf("in: %v\n", in.Shelf)
var resp pb.Shelf
return &resp, nil
}- Make curl request as suggested in the example:
curl -d '{"theme":"Music"}' 'http://localhost:5050/v1/shelves'
The server does not set the Shelf field:
2021/02/07 00:16:57 transport gRPC addr :5040
2021/02/07 00:16:57 transport debug addr :5060
2021/02/07 00:16:57 transport HTTP addr :5050
in: <nil>
If you wrap the body with the shelf object, like curl -d '{"shelf": {"theme":"Music"}}' 'http://localhost:5050/v1/shelves'
the field will be correctly set to theme:"Music"