Method sendRedirect

packages/cli/src/util/dev/server.ts:1416–1452

(
    req: http.IncomingMessage,
    res: http.ServerResponse,
    requestId: string,
    location: string,
    statusCode: number = 302,
    responseTransforms?: Transform[]
  )

  }

  async sendRedirect(
    req: http.IncomingMessage,
    res: http.ServerResponse,
    requestId: string,
    location: string,
    statusCode: number = 302,
    responseTransforms?: Transform[]
  ): Promise<void> {
    output.debug(`Redirect ${statusCode}: ${location}`);

    res.statusCode = statusCode;
    // Apply any previously stored response-transform context to the redirect's
    // headers.
    const redirectHeaders: http.OutgoingHttpHeaders = { location };
    if (responseTransforms) {
      applyResponseTransforms(redirectHeaders, responseTransforms);
    }
    this.setResponseHeaders(res, requestId, redirectHeaders);

    let body: string;
    const { accept = 'text/plain' } = req.headers;
    if (accept.includes('json')) {
      res.setHeader('content-type', 'application/json');
      const json = JSON.stringify({
        redirect: location,
        status: String(statusCode),
      });
      body = `${json}\n`;
    } else if (accept.includes('html')) {
      res.setHeader('content-type', 'text/html; charset=utf-8');
      body = redirectTemplate({ location, statusCode });
    } else {
      res.setHeader('content-type', 'text/plain; charset=utf-8');
      body = `Redirecting...\n`;
    }
    res.end(body);
  }

  getRequestIp(req: http.IncomingMessage): string {
    // TODO: respect the `x-forwarded-for` headers