Zig is a simple and general-purpose programming language. Recently, it's gaining more traction thanks to its benefits. Zig supports Wasm + WASI compilation natively and they use it extensively.

Since it can be compiled to WebAssembly, so there's no requirement of a language runtime like Python, Ruby or JavaScript. The goal for this task is to create the wrapper code to interact with Wasm Workers Server. The same approach we took for the Rust and Go support.

Technical requirements

These are the steps to add Zig support:

1. Read the JSON metadata that comes via STDIN. Here you have the example from the Rust kit:

   wasm-workers-server/kits/rust/src/io.rs

   Lines 15 to 23 in 5631fb4

   	pub struct Input {
   	url: String,
   	method: String,
   	headers: HashMap<String, String>,
   	body: String,
   	kv: HashMap<String, String>,
   	#[serde(default)]
   	params: HashMap<String, String>,
   	}

2. Define the Request, Response and Cache entities. If it's available, it's better to use primitives from the Golang standard library or common usage libraries.

3. Initialize a Request object from the JSON metadata.

4. Initialize the Cache store.

5. Call the worker function with the Request instance.

6. Detect the content in the response. If it's a valid UTF-8 string, we can return. If it uses a different encoding, you need to encode it in base64.

7. Transform the response and the Cache status into the expected JSON output. Note that the base64 flag is only enabled when the content is encoded.

   wasm-workers-server/kits/rust/src/io.rs

   Lines 59 to 65 in 5631fb4

   	pub struct Output {
   	data: String,
   	headers: HashMap<String, String>,
   	status: u16,
   	kv: HashMap<String, String>,
   	base64: bool,
   	}

8. Print the JSON output via STDOUT

Additional notes

• The library should be defined in the kits/zig folder.
• The documentation is available in the site: https://workers.wasmlabs.dev/docs/languages/introduction.
• Currently, we're not publishing the libraries to language registries. Instead, we document how to get it from the GitHub repository.