Routing of an app user's request

[Ignacio Silva-Lepe]

Basic question, when a request is made on an app by a user (say, "curl env.vcap.me), does the message that gets routed to the corresponding droplet/app flow via NATS? Or is there a dedicated channel that the router uses to invoke the app without using NATS at all?

Thanks

[Luke Bakken]

The router keeps track of what DEA servers are hosting an application, and on what port. That way it can just forward the HTTP requests directly for a request like your example.

NATS is used by the DEA during droplet deployment to announce a running application on a dedicated port. The router then uses this information to update its internal information.

[Ignacio Silva-Lepe]

I see, so the router does keep its own routing table. Would it be fair to assume that the router then uses some protocol (e.g., REST) over http to invoke the apps, as opposed to whatever protocol NATS uses?

Thanks

[Dave Syer]

On 07/04/13 17:01, Ignacio Silva-Lepe wrote:
> Would it be fair to assume that the router then uses some protocol
> (e.g., REST) over http to invoke the apps, as opposed to whatever
> protocol NATS uses?

The router is a simple HTTP proxy. It doesn't change the protocol of
the incoming HTTP requests (only enhancing the headers), nor does it
currently support other incoming protocols.

--
Dave Syer
ds...@vmware.com

[Ignacio Silva-Lepe]

Ok, great, thanks for your input. What I'd like to do is to intercept the request as it is being routed to the app. Currently I am browsing through the router code, but any pointers at where to look in particular would be much appreciated.

Thanks