Function parseMetadata

src/pkg/utils/script.ts:24–46

(code: string)

// 从脚本代码抽出Metadata
export function parseMetadata(code: string): SCMetadata | null {
  let isSubscribe = false;
  let headerContent: string;
  let m: RegExpExecArray | null;
  if ((m = HEADER_BLOCK.exec(code))) {
    isSubscribe = m[1] === "Subscribe";
    headerContent = m[2];
  } else {
    return null;
  }
  const metadata: SCMetadata = {} as SCMetadata;
  META_LINE.lastIndex = 0; // 重置正则表达式的lastIndex（用于复用）
  while ((m = META_LINE.exec(headerContent)) !== null) {
    const key = m[1].toLowerCase();
    const val = m[2]?.trim() ?? "";
    const values = metadata[key] || (metadata[key] = []);
    values.push(val);
  }
  if (!metadata.name || Object.keys(metadata).length < 3) return null;
  if (!metadata.namespace) metadata.namespace = [""];
  if (isSubscribe) metadata.usersubscribe = []; // 如果是 user.sub.js, 在 metadata 会有一个额外的 usersubscribe
  return metadata;
}

// 从网址取得脚本代码
export async function fetchScriptBody(url: string, signal?: AbortSignal): Promise<string> {