DQ Client (for DeepQuery Secure)

客户端：把查询请求放到 GM 通道，等待结果返回

当前为 2025-09-04 提交的版本，查看最新版本。

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.greatest.deepsurf.us/scripts/548365/1654687/DQ%20Client%20%28for%20DeepQuery%20Secure%29.js

提问、发表评价或者举报此脚本。

换行

// ==UserScript==
// @name         DQ Client (for DeepQuery Secure)
// @namespace    dq.secure.client
// @version      1.0.0
// @description  客户端：把查询请求放到 GM 通道，等待结果返回
// @match        http://*/*
// @match        https://*/*
// @include      about:blank
// @run-at       document-start
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_addValueChangeListener
// @grant        GM_removeValueChangeListener
// @grant        GM_getTab
// @grant        GM_saveTab
// ==/UserScript==

(function(){
  'use strict';
  const now = () => Date.now();
  const rid = () => (now().toString(36) + Math.random().toString(36).slice(2,8)).toUpperCase();

  function getTabId(){
    return new Promise(resolve=>{
      GM_getTab(tab=>{
        if(!tab) tab = {};
        if(!tab.__dq_tab_id__){ tab.__dq_tab_id__ = rid(); try{ GM_saveTab(tab); }catch{} }
        resolve(tab.__dq_tab_id__);
      });
    });
  }

  async function request(spec){
    const TAB_ID = await getTabId();
    const reqId = rid();
    const KEY_REQ = `DQ_REQ:${TAB_ID}`;
    const KEY_RES = `DQ_RES:${TAB_ID}:${reqId}`;

    return await new Promise((resolve)=>{
      const lid = GM_addValueChangeListener(KEY_RES, (name, oldVal, val, remote)=>{
        if(!remote) return;
        try{ GM_removeValueChangeListener(lid); }catch{}
        try{ GM_setValue(name, null); }catch{}
        resolve(val);
      });
      GM_setValue(KEY_REQ, { tabId: TAB_ID, reqId, spec, at: Date.now() });
    });
  }

  // 语法糖，保持与旧 API 一致
  const DQ = {
    get: (spec)=>request(spec),
    attr:  ({framePath, chain, name, timeout, frameTimeout}) => request({framePath, chain, timeout, frameTimeout, pick: {attr: name}}),
    prop:  ({framePath, chain, name, timeout, frameTimeout}) => request({framePath, chain, timeout, frameTimeout, pick: {prop: name}}),
    text:  ({framePath, chain, timeout, frameTimeout}) => request({framePath, chain, timeout, frameTimeout, pick: {text: true}}),
    html:  ({framePath, chain, timeout, frameTimeout}) => request({framePath, chain, timeout, frameTimeout, pick: {html: true}}),
    rect:  ({framePath, chain, timeout, frameTimeout}) => request({framePath, chain, timeout, frameTimeout, pick: {rect: true}})
  };

  // 暴露到当前脚本的沙箱（不是 page）
  window.DQ = DQ;

  try{ console.debug('[DQ Client] ready: use await DQ.get({...})'); }catch{}
})();