Google Cloud Go Handler without Router Gorilla Mux?

11
votes

https://cloud.google.com/appengine/docs/go/users/

I see here that they do not specify to use any router...: https://cloud.google.com/appengine/docs/go/config/appconfig

In Google Cloud when used with Golang, it says to specify every handler in app.yaml. Does this mean we are not supposed to use 3rd party router for better performance? I would like to Gorilla Mux for router... How would it work if I use other routers for Google App Engine Golang App?

Please let me know. Thanks!

1
google-app-enginegorouter

1 Answers

14
votes

You can use Gorilla Mux with App Engine. Here's how:

At the end of the handlers section of app.yaml, add a script handler that routes all paths to the Go application:

application: myapp
version: 1
runtime: go
api_version: go1

handlers:

- url: /(.*\.(gif|png|jpg))$
  static_files: static/\1
  upload: static/.*\.(gif|png|jpg)$

- url: /.*
  script: _go_app

The _go_app script is the Go program compiled by App Engine. The pattern /.* matches all paths.

The main function generated by App Engine dispatches all requests to the DefaultServeMux.

In an init() function, create and configure a Gorilla Router. Register the Gorilla router with the DefaultServeMux to handle all paths: 

func init() {
    r := mux.NewRouter()
    r.HandleFunc("/", homeHandler)

    // The path "/" matches everything not matched by some other path.
    http.Handle("/", r)
}