Last week, I described the basics of how to develop and deploy a Rust plugin for Apache APISIX. The plugin just logged a message when it received the request. Today, I want to leverage what we learned to create something more valuable: write part of the response-rewrite plugin with Rust.

Adding a Hard-coded Header

Let’s start small and add a hard-coded response header. Last week, we used the on_http_request_headers() function. The proxy_wasm specification defines several function hooks for each step in a request-response lifecycle:

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