grpc-gateway: watch request returns before events

[gyuho]

It's an upstream issue (grpc-ecosystem/grpc-gateway#195).

Just create here to keep track. This just returns without waiting.

curl -L http://localhost:2379/v3alpha/watch -X POST -d '{"create_request": {"key": "Zm9v"}}'

But can't reproduce with the same code:

package main

import (
    "bytes"
    "fmt"
    "reflect"

    "github.com/coreos/etcd/etcdserver/etcdserverpb"
    "github.com/grpc-ecosystem/grpc-gateway/runtime"
)

func main() {
    var marshaler runtime.Marshaler
    marshaler = &runtime.JSONPb{}
    fmt.Println("reflect", reflect.TypeOf(marshaler))

    bts := []byte(`{"create_request": {"key": "Zm9v"}}`)
    dec := marshaler.NewDecoder(bytes.NewReader(bts))

    var protoReq etcdserverpb.WatchRequest
    err := dec.Decode(&protoReq)

    fmt.Println(protoReq, err)
}

[gyuho]

It's about how we send POST request (cURL, ...). Will close upstream issue as well. Update grpc-gateway dependency to the latest.

[gyuho]

This is now fixed via #6864.