zeroclaw-labs/zeroclaw · error

HTTP CONNECT proxy closed connection before response

Error message

HTTP CONNECT proxy closed connection before response

What it means

Error "HTTP CONNECT proxy closed connection before response" thrown in zeroclaw-labs/zeroclaw.

Source

Thrown at crates/zeroclaw-config/src/schema.rs:10956

            let proxy_addr = format!("{proxy_host}:{proxy_port}");

            let mut tcp = TcpStream::connect(&proxy_addr)
                .await
                .with_context(|| format!("TCP connect to HTTP proxy {proxy_addr}"))?;

            // Send HTTP CONNECT request.
            let connect_req = format!(
                "CONNECT {target_host}:{target_port} HTTP/1.1\r\nHost: {target_host}:{target_port}\r\n\r\n"
            );
            tcp.write_all(connect_req.as_bytes()).await?;

            // Read the response (we only need the status line).
            let mut buf = vec![0u8; 4096];
            let mut total = 0usize;
            loop {
                let n = tcp.read(&mut buf[total..]).await?;
                if n == 0 {
                    anyhow::bail!("HTTP CONNECT proxy closed connection before response");
                }
                total += n;
                // Look for end of HTTP headers.
                if let Some(pos) = find_header_end(&buf[..total]) {
                    let status_line = std::str::from_utf8(&buf[..pos])
                        .unwrap_or("")
                        .lines()
                        .next()
                        .unwrap_or("");
                    if !status_line.contains("200") {
                        anyhow::bail!(
                            "HTTP CONNECT proxy returned non-200 response: {status_line}"
                        );
                    }
                    break;
                }
                if total >= buf.len() {
                    anyhow::bail!("HTTP CONNECT proxy response too large");

View on GitHub (pinned to 88bb9c8533)

Solutions

1. Check the proxy server is up and supports HTTP CONNECT; verify proxy host and port in config.

When it happens

Trigger: Thrown at crates/zeroclaw-config/src/schema.rs:10956 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zeroclaw-labs/zeroclaw@88bb9c8533 (2026-08-23). Data as JSON: /api/errors/ad080eaa96a9ce47. Report an issue: GitHub.