Method serve

lib/index.ts:571–601

* Handles a request serving of client source and map * * @param req * @param res * @private

(req: http.IncomingMessage, res: http.ServerResponse)

   * @private
   */
  private serve(req: http.IncomingMessage, res: http.ServerResponse): void {
    const filename = req.url!.replace(this._path, "").replace(/\?.*$/, "");
    const isMap = dotMapRegex.test(filename);
    const type = isMap ? "map" : "source";

    // Per the standard, ETags must be quoted:
    // https://tools.ietf.org/html/rfc7232#section-2.3
    const expectedEtag = '"' + clientVersion + '"';
    const weakEtag = "W/" + expectedEtag;

    const etag = req.headers["if-none-match"];
    if (etag) {
      if (expectedEtag === etag || weakEtag === etag) {
        debug("serve client %s 304", type);
        res.writeHead(304);
        res.end();
        return;
      }
    }

    debug("serve client %s", type);

    res.setHeader("Cache-Control", "public, max-age=0");
    res.setHeader(
      "Content-Type",
      "application/" + (isMap ? "json" : "javascript") + "; charset=utf-8"
    );
    res.setHeader("ETag", expectedEtag);

    Server.sendFile(filename, req, res);
  }

  /**
   * @param filename