code: function redirect(url) {
    // unset headers
    const { res } = this;
    res
      .getHeaderNames()
      .filter(name => !name.match(/^access-control-|vary|x-amz-/i))
      .forEach(name => res.removeHeader(name));
  
    this.set("Location", url);
  
    // status
    if (!statuses.redirect[this.status]) this.status = 302;
  
    if (this.status === 302) {
      const redirect = new S3Error("Found", "Resource Found");
      redirect.description = "302 Moved Temporarily";
      this.body = redirect.toHTML();
      this.type = "text/html";
    } else {
      this.body = "";
      this.type = "";
    }
  }
docs: Overrides Koa's redirect behavior with one more closely matching S3
  
  @param {string} url