openai/codex · error · anyhow::Error

missing host in network proxy address: {input}

Error message

missing host in network proxy address: {input}

What it means

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

Source

Thrown at codex-rs/network-proxy/src/config.rs:571

        .split_once("://")
        .map(|(_, rest)| rest)
        .unwrap_or(input);
    let host_port = without_scheme.split('/').next().unwrap_or(without_scheme);
    let host_port = host_port
        .rsplit_once('@')
        .map(|(_, rest)| rest)
        .unwrap_or(host_port);

    if host_port.starts_with('[')
        && let Some(end) = host_port.find(']')
    {
        let host = &host_port[1..end];
        let port = host_port[end + 1..]
            .strip_prefix(':')
            .and_then(|port| port.parse::<u16>().ok())
            .unwrap_or(default_port);
        if host.is_empty() {
            bail!("missing host in network proxy address: {input}");
        }
        return Ok(SocketAddressParts {
            host: host.to_string(),
            port,
        });
    }

    // Only treat `host:port` as such when there's a single `:`. This avoids
    // accidentally interpreting unbracketed IPv6 addresses as `host:port`.
    if host_port.bytes().filter(|b| *b == b':').count() == 1
        && let Some((host, port)) = host_port.rsplit_once(':')
    {
        if host.is_empty() {
            bail!("missing host in network proxy address: {input}");
        }
        return Ok(SocketAddressParts {
            host: host.to_string(),
            port: port.parse::<u16>().ok().unwrap_or(default_port),

View on GitHub (pinned to 339751715c)

When it happens

Trigger: Thrown at codex-rs/network-proxy/src/config.rs:571 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/1b91e69dc620e3ce. Report an issue: GitHub.