Envoy filter written in Rust to provide Reponse Body Injection (RBI). This requires Envoy's WASM filters
rustup target add wasm32-wasi
cargo build --target wasm32-wasiRelease build
rustup target add wasm32-wasi
cargo build --target wasm32-wasi --releaseAdd the WASM filter configuration to http_filters as part of Envoy's HTTP Connection Management configuration.
- name: envoy.filters.http.wasm
typed_config:
"@type": type.googleapis.com/udpa.type.v1.TypedStruct
type_url: type.googleapis.com/envoy.extensions.filters.http.wasm.v3.Wasm
value:
config:
name: "rbi_filter"
root_id: "rbi_filter_id"
configuration:
"@type": "type.googleapis.com/google.protobuf.StringValue"
value: |
{
"hello": "<h1>Hello WASM</h1>"
}
vm_config:
runtime: "envoy.wasm.runtime.v8"
vm_id: "rbi_injection_vm_id"
code:
local:
filename: "/etc/envoy/envoy_rbi_filter.wasm"
configuration: {}To run the example local:
cargo build --target wasm32-wasi
docker compose up --build --file ./example/docker-compose.yamlSend the local running cluster traffic:
curl -vvv http://localhost:10000/
# * Trying ::1...
# * TCP_NODELAY set
# ...
# * Connection #0 to host localhost left intact
# <html><body><h1>Hello WASM</h1></body></html>
# * Closing connection 0End to end integration tests require the example to run local.
cargo test