go-http 0.1.3

rust native port of GO's http module
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

// SPDX-License-Identifier: Apache-2.0
//! Echo server — reflects method, path, and request headers as JSON.
//!
//! Run: `cargo run --example echo_server`
//! Then: `curl -H "X-Foo: bar" http://127.0.0.1:8081/anything`

use go_http::{handler::ServeMux, server::Server};

#[go_lib::main]
fn main() {
    let mux = std::sync::Arc::new(ServeMux::new());

    mux.handle_func("/", |w, r| {
        // Build a simple JSON object with method, path, and headers.
        let mut json = String::from("{\n");
        json.push_str(&format!("  \"method\": \"{}\",\n", r.method));
        json.push_str(&format!("  \"path\": \"{}\",\n", r.url.path()));

        if let Some(q) = r.url.query() {
            json.push_str(&format!("  \"query\": \"{q}\",\n"));
        }

        json.push_str("  \"headers\": {\n");
        let mut headers: Vec<(&str, &[String])> = r.header.iter().collect();
        headers.sort_by_key(|(k, _)| *k);
        let last = headers.len().saturating_sub(1);
        for (i, (name, values)) in headers.iter().enumerate() {
            let val = values.join(", ");
            let comma = if i < last { "," } else { "" };
            json.push_str(&format!("    \"{name}\": \"{val}\"{comma}\n"));
        }
        json.push_str("  }\n}\n");

        w.header().set("Content-Type", "application/json");
        let _ = w.write(json.as_bytes());
    });

    println!("Echo server on http://127.0.0.1:8081");
    println!("Try: curl -H 'X-Custom: hello' http://127.0.0.1:8081/path?q=1");

    let mut srv = Server::new("127.0.0.1:8081");
    srv.handler = Some(mux);
    if let Err(e) = srv.listen_and_serve() {
        eprintln!("server error: {e}");
    }
}