Add more docs

.github/workflows/ci.yml

@@ -20,3 +20,5 @@ jobs:
         run: cargo fmt --all -- --check
       - name: cargo clippy
         run: cargo clippy --all-targets --all-features -- -D warnings
+      - name: cargo test
+        run: cargo test

README.md

@@ -1,2 +1,15 @@
 # wasi-http-client
-HTTP client library for WASI.
+
+HTTP client library for [WASI Preview 2](https://github.com/WebAssembly/WASI/tree/main/preview2),
+making it easier to send http(s) requests in WASI components.
+
+```rust
+let resp = Client::new()
+    .post("https://httpbin.org/post")
+    .body("hello".as_bytes())
+    .connect_timeout(Duration::from_secs(5))
+    .send()
+    .unwrap();
+
+println!("status code: {}", resp.status());
+```

examples/README.md

@@ -0,0 +1,34 @@
+# Examples
+
+See https://github.com/wacker-dev/wasi-examples/tree/main/http-client for a real-world example.
+After compilation, you can use [wasmtime](https://github.com/bytecodealliance/wasmtime) to run it:
+
+```
+$ wasmtime -S http target/wasm32-wasi/debug/http_client.wasm
+
+status code: 200
+content-type: application/json
+content-length: 297
+access-control-allow-credentials: true
+server: gunicorn/19.9.0
+date: Sat, 11 May 2024 09:46:38 GMT
+access-control-allow-origin: *
+body:
+{
+  "args": {},
+  "data": "hello",
+  "files": {},
+  "form": {},
+  "headers": {
+    "Content-Length": "5",
+    "Host": "httpbin.org",
+    "X-Amzn-Trace-Id": "Root=1-663f3e7e-6e3f84f87a20aef56c58a344"
+  },
+  "json": null,
+  "origin": "……",
+  "url": "https://httpbin.org/post"
+}
+```
+
+There are specific steps for compilation in the [README](https://github.com/wacker-dev/wasi-examples/blob/main/http-client/README.md),
+and the main logic of the sample program is located at [lib.rs](https://github.com/wacker-dev/wasi-examples/blob/main/http-client/src/lib.rs#L14-L19).

src/lib.rs

@@ -1,3 +1,23 @@
+//! # wasi-http-client
+//!
+//! `wasi_http_client` is an HTTP client library for [WASI Preview 2](https://github.com/WebAssembly/WASI/tree/main/preview2),
+//! making it easier to send http(s) requests in WASI components.
+//!
+//! ```
+//! # use std::time::Duration;
+//! # use wasi_http_client::Client;
+//! # fn run() {
+//! let resp = Client::new()
+//!     .post("https://httpbin.org/post")
+//!     .body("hello".as_bytes())
+//!     .connect_timeout(Duration::from_secs(5))
+//!     .send()
+//!     .unwrap();
+//!
+//! println!("status code: {}", resp.status());
+//! # }
+//! ```
+
 mod client;
 mod request;
 mod response;