webproxy streaming support

[moshababo]

#128 is a prerequisite.

[moshababo]

This can be implemented now.

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[rsercano]

Hello @moshababo I'm interested in this issue, would you please explain more ?

[moshababo]

Hi, @rsercano, good to see you here.
We're using gRPC to expose our high-level API. gRPC server doesn't support browser clients, so we added a web proxy layer to expose all the methods via simple HTTP endpoints (at the moment it's disabled by default). It supports simple request-response calls, but not calls which use server-side streaming. We created one streaming call so far (#144), that can be used for testing purposes.

[rsercano]

Therefore, we need it to support streaming on web proxy layer ?

p.s. swagger doesn't work while using "Try it Out" button, it tries to send URLs without /api in it :)

[moshababo]

Yes, or some kind of polling mechanism.

Haven't got a chance to try the swagger yet. Feel free to open a bug.

[itsbalamurali]

@rsercano @moshababo http long polling can also be an option.

[kilrau]

Just stumbled upon this project, which seems well maintained and got streaming rpc's included. We might be able to use some stuff. Realistic you'll have time to take care of this in the next weeks? @rsercano

[sangaman]

Looks cool, if I'm reading that right we could drop our need for a web proxy entirely?

[kilrau]

Open question @moshababo

[moshababo]

@kilrau we looked at this project in the beginning. the streaming web proxy support is a stand-alone Go project. We wanted to have it as a native feature in our JS project instead.
Before implementing, we should definitely look on their Go implementation.

[sangaman]

Oh I think that's right and I just had amnesia. Maybe first lets see how easy it is to handle streaming calls with our current approach, for all I know it might work already, I just haven't tried it yet.

[kilrau]

Since the main usage of the webproxy will be raiden and raiden doesn't seem to have streams, I am closing this. We can open a new issue once we have a concrete need for streaming for the webproxy. Please reopen if you object, but we'd need some details on what we need it for. @sangaman @moshababo