知乎收藏夹导出

ExportZhihuCollection.js

// ==UserScript==
// @name         知乎收藏夹导出
// @namespace    http://tampermonkey.net/
// @version      4.1
// @description  静默请求原生 API，并按照“名字+ID+数量+时间”的格式化文件名导出
// @author       Gemini
// @match        https://www.zhihu.com/collection/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

// Gemini 对话：https://gemini.google.com/app/e641a19324d20907?hl=zh-CN
(function() {
    'use strict';

    let collectionId = window.location.pathname.split('/').pop();
    let isWorking = false;

    // --- 1. 模拟网络请求函数 ---
    async function fetchAllCollectionData() {
        let allItems = [];
        let offset = 0;
        let limit = 20;
        let isEnd = false;

        updateBtnStatus(`准备开始...`);

        while (!isEnd && isWorking) {
            const apiUrl = `https://www.zhihu.com/api/v4/collections/${collectionId}/items?offset=${offset}&limit=${limit}`;
            console.log(`[API模拟] 正在请求: ${apiUrl}`);

            try {
                const response = await window.fetch(apiUrl, {
                    headers: {
                        'accept': 'application/json, text/plain, */*',
                        'x-requested-with': 'XMLHttpRequest'
                    }
                });

                if (!response.ok) {
                    throw new Error(`HTTP 错误! 状态码: ${response.status}`);
                }

                const resBody = await response.json();

                if (resBody && resBody.data) {
                    allItems.push(...resBody.data);
                    updateBtnStatus(`已下载: ${allItems.length} 条`);

                    if (resBody.paging && resBody.paging.is_end === false) {
                        offset += limit;
                        // 随机延迟防风控
                        await new Promise(resolve => setTimeout(resolve, 1000 + Math.random() * 500));
                    } else {
                        isEnd = true;
                    }
                } else {
                    isEnd = true;
                }
            } catch (error) {
                console.error('[API模拟] 请求出错:', error);
                alert(`请求失败。当前已抓取 ${allItems.length} 条。`);
                break;
            }
        }

        if (allItems.length > 0) {
            triggerDownload(allItems);
        }
        isWorking = false;
        updateBtnStatus('🚀 导出全量 JSON');
    }

    // --- 2. 格式化当前时间 (YYYYMMDD_HHmmss) ---
    function getFormattedTime() {
        const now = new Date();
        const year = now.getFullYear();
        const month = String(now.getMonth() + 1).padStart(2, '0');
        const day = String(now.getDate()).padStart(2, '0');
        const hours = String(now.getHours()).padStart(2, '0');
        const minutes = String(now.getMinutes()).padStart(2, '0');
        const seconds = String(now.getSeconds()).padStart(2, '0');

        return `${year}${month}${day}_${hours}${minutes}${seconds}`;
    }

    // --- 3. 动态组装文件名并下载 ---
    function triggerDownload(finalData) {
        // 动态获取收藏夹名称（兼容两种知乎常见的类名）
        const titleEl = document.querySelector('.CollectionDetailPageHeader-title') ||
                        document.querySelector('.CollectionDetailHeader-title');
        const folderName = titleEl ? titleEl.innerText.trim() : '知乎收藏夹';

        const recordCount = finalData.length;
        const timeStr = getFormattedTime();

        // 核心：按照“收藏夹名_收藏夹Id_记录数_导出时间.json”拼接
        const filename = `${folderName}_${collectionId}_${recordCount}条_${timeStr}.json`;

        const blob = new Blob([JSON.stringify(finalData, null, 2)], { type: 'application/json' });
        const a = document.createElement('a');
        a.href = URL.createObjectURL(blob);
        a.download = filename;
        document.body.appendChild(a);
        a.click();

        setTimeout(() => {
            document.body.removeChild(a);
            URL.revokeObjectURL(a.href);
            alert(`导出成功！\n文件已保存为：${filename}`);
        }, 500);
    }

    // --- 4. UI 注入与状态控制 ---
    function injectButton() {
        if (document.getElementById('tm-export-btn')) return;

        const target = document.querySelector('.CollectionDetailPageHeader-actions') ||
                       document.querySelector('.CollectionDetailHeader-actions');
        if (!target) return;

        const btn = document.createElement('button');
        btn.id = 'tm-export-btn';
        btn.innerText = '🚀 导出全量 JSON';
        btn.style = `margin-left:10px; padding:6px 16px; background:#0066ff; color:#fff; border:none; border-radius:999px; cursor:pointer; font-weight:600; vertical-align: middle;`;

        btn.onclick = () => {
            if (isWorking) {
                if (confirm("正在抓取中，是否强行停止并保存当前已下载的数据？")) {
                    isWorking = false;
                }
                return;
            }

            if (confirm("开始在后台静默请求知乎 API 获取最完整的无损数据，确定吗？")) {
                isWorking = true;
                fetchAllCollectionData();
            }
        };
        target.appendChild(btn);
    }

    function updateBtnStatus(text) {
        const btn = document.getElementById('tm-export-btn');
        if (btn) btn.innerText = text;
    }

    setInterval(injectButton, 1000);
})();