Network policy: wildcard host matching not supported

[JMLX42]

Summary

The network policy's AllowedHost::matches() performs exact string comparison, so neither global wildcards (host: "*") nor subdomain wildcards (host: "*.example.com") work. The wildcard characters are stored literally and compared against request hosts, which never matches.

Reproduction

1. Load a WASM component with a policy granting network access to host: "*" (or host: "*.example.com")
2. The component attempts an HTTP request to any host (e.g., https://www.sciencedaily.com/...)
3. The request is blocked with:

   WARN wassette::http: HTTP request blocked by network policy
     uri=https://www.sciencedaily.com/...
     allowed_hosts={AllowedHost { scheme: None, host: "*" }}
   

Root cause

In crates/wassette/src/http.rs, AllowedHost::matches() does:

fn matches(&self, request_host: &str, request_scheme: Option<&str>) -> bool {
    if self.host != request_host {
        return false;
    }
    // ...
}

There is no special handling for wildcards — they are compared literally against the request host.

Expected behavior

Two wildcard patterns should be supported:

Pattern	Matches	Does not match
*	any host	—
*.example.com	foo.example.com, bar.baz.example.com	example.com (bare domain)

Suggested fix

fn matches(&self, request_host: &str, request_scheme: Option<&str>) -> bool {
    let host_matches = if self.host == "*" {
        true
    } else if let Some(suffix) = self.host.strip_prefix("*.") {
        request_host.ends_with(suffix)
            && request_host.len() > suffix.len()
            && request_host.as_bytes()[request_host.len() - suffix.len() - 1] == b'.'
    } else {
        self.host == request_host
    };

    if !host_matches {
        return false;
    }

    match (&self.scheme, request_scheme) {
        (Some(allowed_scheme), Some(req_scheme)) => allowed_scheme == req_scheme,
        _ => true,
    }
}

---

_{This issue was drafted with the help of an AI assistant (Claude).}

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