proxy-wasm-golang-example

README

Proxy Wasm Golang Example

This repo is an example of a WASM filter implemented in Golang. This filter only adds the header x-wasm-custom with the value FOO.

Building the filter

This build requires TinyGo. The Makefile also supports using TinyGo directly or use a docker image to build the wasm filter.

$ make

To run Envoy with this filter:

$ make run

Then, to test the filter:

$ curl http://localhost:18000 -v
* Connected to localhost (127.0.0.1) port 18000 (#0)
> GET / HTTP/1.1
> Host: localhost:18000
> User-Agent: curl/7.77.0
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< content-length: 13
< content-type: text/plain
< date: Sun, 09 Jan 2022 17:18:09 GMT
< server: envoy
< x-envoy-upstream-service-time: 0
< x-wasm-custom: FOO
<
example body
* Connection #0 to host localhost left intact

To run the unit tests, run:

$ make test