openai/codex · error · anyhow::Error

missing host in network proxy address: {url}

Error message

missing host in network proxy address: {url}

What it means

Error "missing host in network proxy address: {url}" thrown in openai/codex.

Source

Thrown at codex-rs/network-proxy/src/config.rs:517

fn format_host_and_port(host: &str, port: u16) -> String {
    if host.contains(':') {
        format!("[{host}]:{port}")
    } else {
        format!("{host}:{port}")
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
struct SocketAddressParts {
    host: String,
    port: u16,
}

fn parse_host_port(url: &str, default_port: u16) -> Result<SocketAddressParts> {
    let trimmed = url.trim();
    if trimmed.is_empty() {
        bail!("missing host in network proxy address: {url}");
    }

    // Avoid treating unbracketed IPv6 literals like "2001:db8::1" as scheme-prefixed URLs.
    if matches!(trimmed.parse::<IpAddr>(), Ok(IpAddr::V6(_))) && !trimmed.starts_with('[') {
        return Ok(SocketAddressParts {
            host: trimmed.to_string(),
            port: default_port,
        });
    }

    // Prefer the standard URL parser when the input is URL-like. Prefix a scheme when absent so
    // we still accept loose host:port inputs.
    let candidate = if trimmed.contains("://") {
        trimmed.to_string()
    } else {
        format!("http://{trimmed}")
    };
    if let Ok(parsed) = Url::parse(&candidate)

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/network-proxy/src/config.rs:517 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of openai/codex@339751715c (2026-08-25). Data as JSON: /api/errors/6e52b7f0430fe39e. Report an issue: GitHub.