[TT-10277] There is no timeout in the gRPC plugin coprocess

[cuongtd1301]

Is your feature request related to a problem? Please describe.
When using gRPC plugins, there's no way to specify a timeout. I set the processing time of the plugin too long (over 2 minutes), there will be no response returned even though the gateway has completed the execution.

Describe the solution you'd like

• MiddlewareDefinition: add timeout field (second)

{
    "name" : "DemoPre",
    "timeout": 10
}

• CoProcessMiddleware: add timeout field

type CoProcessMiddleware struct {
 BaseMiddleware
 HookType         coprocess.HookType
 HookName         string
 MiddlewareDriver apidef.MiddlewareDriver
 RawBodyOnly      bool
 Timeout          int

 successHandler *SuccessHandler
}

• Dispatcher: add context.Context paramter

type Dispatcher interface {
 // Dispatch takes and returns a pointer to a CoProcessMessage struct, see coprocess/api.h for details. This is used by CP bindings.
 Dispatch(context.Context, *Object) (*Object, error)
 ...

GRPCDispatcher (and PythonDispatcher) implement Dispatch, add ctx parameter

// Dispatch takes a CoProcessMessage and sends it to the CP.
func (d *GRPCDispatcher) Dispatch(ctx context.Context, object *coprocess.Object) (*coprocess.Object, error) {
 return grpcClient.Dispatch(ctx, object)
}

[andyo-tyk]

Hi @cuongtd1301,

I'm sorry for the slow acknowledgement here - thank you for your suggestion and PR. It seems like a reasonable capability to add to Tyk, we'll take a look at this and will let you know if and when we can add it to the product.

Thanks again for your contribution!