tonhowtf/omniget · error

Proxy host cannot be empty

Error message

Proxy host cannot be empty

What it means

Proxy URL parsing guard in parse_proxy: after splitting scheme and userinfo the host:port section has no ':' separator, so the authority lacks a port and the proxy cannot be turned into a valid client config.

Solutions

1. Fill in the proxy host before the colon, e.g. http://127.0.0.1:7897.
2. If the placeholder was meant for the local proxy, use 127.0.0.1.
3. Validate the proxy string with a regex like ^https?|socks5://([^@]+@)?[^:]+:[0-9]+$ before invoking the CLI.

Example fix

// before
--proxy http://:7897
// after
--proxy http://127.0.0.1:7897

const authority = proxyUrl.split('://')[1] ?? '';
const hostPort = authority.split('@').pop() ?? '';
const host = hostPort.slice(0, hostPort.lastIndexOf(':'));
if (!host) throw new Error('Proxy host is empty');

When it happens

Trigger: Passing a proxy like 'http://:7897' or 'socks5://:1080' where the host part before the colon is empty.

Common situations: Copy-paste errors where the host got deleted, or template configs where a placeholder host was never filled in.

Understand the failure class

Background: "must not be empty", "cannot be empty" — required-field validation errors across open-source libraries — this error's family across 41 libraries.

Related errors

• Unsupported proxy scheme
• Proxy must include host and port, e.g. http://127.0.0.1:7897
• formato desconhecido
• Proxy must include a scheme, e.g. http://127.0.0.1:7897
• No valid cookies found in file (expected Netscape format)

AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/0bfc333b4f3879e8. Report an issue: GitHub.

Appendix: source

Thrown at src-tauri/omniget-cli/src/commands/common.rs:59

        .ok_or_else(|| anyhow!("Proxy must include a scheme, e.g. http://127.0.0.1:7897"))?;

    let proxy_type = match scheme {
        "http" | "https" | "socks5" => scheme.to_string(),
        other => return Err(anyhow!("Unsupported proxy scheme: {}", other)),
    };

    let authority = rest.split('/').next().unwrap_or(rest);
    let (auth, host_port) = match authority.rsplit_once('@') {
        Some((auth, host_port)) => (Some(auth), host_port),
        None => (None, authority),
    };

    let (host, port) = host_port
        .rsplit_once(':')
        .ok_or_else(|| anyhow!("Proxy must include host and port, e.g. http://127.0.0.1:7897"))?;

    if host.is_empty() {
        return Err(anyhow!("Proxy host cannot be empty"));
    }

    let port = port
        .parse::<u16>()
        .with_context(|| format!("Invalid proxy port: {}", port))?;

    let (username, password) = match auth.and_then(|a| a.split_once(':')) {
        Some((u, p)) => (u.to_string(), p.to_string()),
        None => (String::new(), String::new()),
    };

    Ok(ProxySettings {
        enabled: true,
        proxy_type,
        host: host.to_string(),
        port,
        username,
        password,

View on GitHub (pinned to 8600b91f42)