ple.mpegurl" ||
      mimeType === "application/x-mpegurl" ||
      mimeType === "application/ogg")
  );
}

function isWS({ requestHeaders, responseHeaders, cause }) {
  // For the first call, the requestHeaders is not ready(empty),
  // so checking for cause.type instead (Bug-1454962)
  if (typeof cause.type === "string" && cause.type === "websocket") {
    return true;
  }
  // Detect a websocket upgrade if request has an Upgrade header with value 'websocket'
  if (!requestHeaders || !Array.isArray(requestHeaders.headers)) {
    return false;
  }

  // Find the 'upgrade' header.
  let upgradeHeader = requestHeaders.headers.find(header => {
    return header.name.toLowerCase() == "upgrade";
  });

  // If no header found on request, check response - mainly to get
  // something we can unit test, as it is impossible to set
  // the Upgrade header on outgoing XHR as per the spec.
  if (
    !upgradeHeader &&
    responseHeaders &&
    Array.isArray(responseHeaders.headers)
  ) {
    upgradeHeader = responseHeaders.headers.find(header => {
      return header.name.toLowerCase() == "upgrade";
    });
  }

  // Return false if there is no such header or if its value isn't 'websocket'.
  if (!upgradeHeader || upgradeHeader.value != "websocket") {
    return false;
  }

  return true;
}

function isOther(item) {
  const tests = [isHtml, isCss, isJs, isXHR, isFont, isImage, isMedia, isWS];
  return tests.every(is => !is(item));
}

module.exports = {
  Filters: {
    all,
    html: isHtml,
    css: isCss,
    js: isJs,
    xhr: isXHR,
    fonts: isFont,
    images: isImage,
    media: isMedia,
    ws: isWS,
    other: isOther,
  },
  isFreetextMatch,
};
PK