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use std::env;
use std::net::SocketAddr;
use bytes::Bytes;
use http_body_util::{BodyExt, Full};
use hyper::body::Incoming;
use hyper::server::conn::http1;
use hyper::service::service_fn;
use hyper::{Method, Request, Response, StatusCode, Uri};
use hyper::header::HeaderMap;
use hyper_util::client::legacy::Client;
use hyper_util::rt::TokioExecutor;
use tokio::net::TcpListener;
const DEFAULT_BASE_URL: &str = "http://100.102.55.49:3000";
const DEFAULT_PORT: u16 = 8080;
type BoxError = Box<dyn std::error::Error + Send + Sync>;
/// Parse the incoming path into the Dokploy deploy API path.
/// - "/<token>" -> "/api/deploy/<token>"
/// - "/compose/<token>" -> "/api/deploy/compose/<token>"
/// Returns None if the path doesn't match.
fn map_path(path: &str) -> Option<String> {
let trimmed = path.trim_start_matches('/');
if trimmed.is_empty() {
return None;
}
if let Some(token) = trimmed.strip_prefix("compose/") {
if !token.is_empty() && !token.contains('/') {
return Some(format!("/api/deploy/compose/{}", token));
}
return None;
}
if !trimmed.contains('/') {
return Some(format!("/api/deploy/{}", trimmed));
}
None
}
/// Check if the Content-Type header indicates form-urlencoded data.
fn content_type_is_form_urlencoded(headers: &HeaderMap) -> bool {
headers
.get(hyper::header::CONTENT_TYPE)
.and_then(|v| v.to_str().ok())
.map(|ct| ct.starts_with("application/x-www-form-urlencoded"))
.unwrap_or(false)
}
/// Extract JSON from a form-urlencoded body.
/// GitHub sends webhooks as `payload=<url-encoded-json>` when the webhook
/// content type is set to `application/x-www-form-urlencoded`.
fn extract_json_from_form(body: &Bytes) -> Option<Bytes> {
for (key, value) in form_urlencoded::parse(body) {
if key == "payload" {
return Some(Bytes::from(value.into_owned()));
}
}
None
}
async fn handle(
base_url: String,
req: Request<Incoming>,
) -> Result<Response<Full<Bytes>>, BoxError> {
// Only allow POST
if req.method() != Method::POST {
eprintln!("{} {} -> 405 Method Not Allowed", req.method(), req.uri().path());
return Ok(Response::builder()
.status(StatusCode::METHOD_NOT_ALLOWED)
.body(Full::new(Bytes::from("Method Not Allowed\n")))
.unwrap());
}
let path = req.uri().path().to_string();
// Map the path
let upstream_path = match map_path(&path) {
Some(p) => p,
None => {
eprintln!("POST {} -> 404 Not Found", path);
return Ok(Response::builder()
.status(StatusCode::NOT_FOUND)
.body(Full::new(Bytes::from("Not Found\n")))
.unwrap());
}
};
let upstream_uri: Uri = format!("{}{}", base_url, upstream_path).parse()?;
eprintln!("POST {} -> forwarding to {}", path, upstream_uri);
// Extract headers before consuming the request body
let headers = req.headers().clone();
let is_form = content_type_is_form_urlencoded(&headers);
// Build upstream request preserving headers and body
let mut builder = Request::builder()
.method(Method::POST)
.uri(&upstream_uri);
// Copy headers (skip Host; skip Content-Type and Content-Length when
// we are going to convert from form-urlencoded to JSON)
for (name, value) in &headers {
if name == hyper::header::HOST {
continue;
}
if is_form
&& (name == hyper::header::CONTENT_TYPE
|| name == hyper::header::CONTENT_LENGTH)
{
continue;
}
builder = builder.header(name, value);
}
// Collect the incoming body
let body_bytes = req.into_body().collect().await?.to_bytes();
// If the body is application/x-www-form-urlencoded (GitHub default), extract the
// "payload" field and convert to application/json so Dokploy can parse it.
let body_bytes = if is_form {
match extract_json_from_form(&body_bytes) {
Some(json_bytes) => {
eprintln!("POST {} -> converting form-urlencoded payload to JSON", path);
builder = builder.header(hyper::header::CONTENT_TYPE, "application/json");
json_bytes
}
None => {
// Not convertible; restore original headers
builder = builder.header(hyper::header::CONTENT_TYPE, "application/x-www-form-urlencoded");
body_bytes
}
}
} else {
body_bytes
};
let upstream_req = builder.body(Full::new(body_bytes))?;
// Send to Dokploy
let client = Client::builder(TokioExecutor::new()).build_http();
let upstream_resp = match client.request(upstream_req).await {
Ok(resp) => resp,
Err(e) => {
eprintln!("POST {} -> 502 upstream error: {}", path, e);
return Ok(Response::builder()
.status(StatusCode::BAD_GATEWAY)
.body(Full::new(Bytes::from(format!("Bad Gateway: {}\n", e))))
.unwrap());
}
};
// Forward the upstream response back
let status = upstream_resp.status();
let resp_body = upstream_resp.into_body().collect().await?.to_bytes();
eprintln!("POST {} -> upstream responded {}", path, status);
Ok(Response::builder()
.status(status)
.body(Full::new(resp_body))
.unwrap())
}
#[tokio::main]
async fn main() -> Result<(), BoxError> {
let base_url = env::var("DOKPLOY_BASE_URL")
.unwrap_or_else(|_| DEFAULT_BASE_URL.to_string())
.trim_end_matches('/')
.to_string();
let port: u16 = env::var("PORT")
.ok()
.and_then(|p| p.parse().ok())
.unwrap_or(DEFAULT_PORT);
let addr = SocketAddr::from(([0, 0, 0, 0], port));
let listener = TcpListener::bind(addr).await?;
eprintln!("webhook-forwarder listening on {}", addr);
eprintln!("forwarding to {}", base_url);
loop {
let (stream, _) = listener.accept().await?;
let base_url = base_url.clone();
tokio::task::spawn(async move {
let io = hyper_util::rt::TokioIo::new(stream);
let service = service_fn(move |req| {
let base_url = base_url.clone();
handle(base_url, req)
});
if let Err(e) = http1::Builder::new().serve_connection(io, service).await {
eprintln!("connection error: {}", e);
}
});
}
}
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