Method eleventyDevServerMiddleware

server.js:479–557

(req, res, next)

  }

  async eleventyDevServerMiddleware(req, res, next) {
    if(this.#serverState === "CLOSING") {
      return res.end("");
    }

    for(let urlPatternString in this.options.onRequest) {
      let fn = this.options.onRequest[urlPatternString];
      let fullPath = this.getServerPath(urlPatternString);
      let p = new URLPattern({ pathname: fullPath });

      // request url should already include pathprefix.
      let fullUrl = this.getServerUrlRaw("localhost", req.url);
      let match = p.exec(fullUrl);

      let u = new URL(fullUrl);

      if(match) {
        let result = await fn({
          url: u,
          pattern: p,
          patternGroups: match?.pathname?.groups || {},
        });

        if(!result && result !== "") {
          continue;
        }

        if(typeof result === "string") {
          return res.end(result);
        }

        if(isPlainObject(result) || result instanceof Response) {
          if(typeof result.status === "number") {
            res.statusCode = result.status;
          }

          if(result.headers instanceof Headers) {
            for(let [key, value] of result.headers.entries()) {
              res.setHeader(key, value);
            }
          } else if(isPlainObject(result.headers)) {
            for(let key of Object.keys(result.headers)) {
              res.setHeader(key, result.headers[key]);
            }
          }

          if(result instanceof Response) {
            // no gzip/br compression here, uncompressed from fetch https://github.com/w3c/ServiceWorker/issues/339
            res.removeHeader("content-encoding");

            let arrayBuffer = await result.arrayBuffer();
            res.setHeader("content-length", arrayBuffer.byteLength);

            let buffer = Buffer.from(arrayBuffer);
            return res.end(buffer);
          }

          return res.end(result.body || "");