Save page as single HTML file.
// ==UserScript==
// @name Save Page
// @name:en Save Page
// @name:zh-CN 保存页面
// @description Save page as single HTML file.
// @description:en Save page as single HTML file.
// @description:zh-CN 将页面保存为单个 HTML 文件。
// @namespace https://greasyfork.org/users/197529
// @version 0.1.7
// @author kkocdko
// @license Unlicense
// @match *://*/*
// @grant GM_xmlhttpRequest
// @noframes
// ==/UserScript==
"use strict";
const { addFloatButton, fetchex } = {
addFloatButton(text, onclick) /* 20220509-1936 */ {
if (!document.addFloatButton) {
const host = document.body.appendChild(document.createElement("div"));
const root = host.attachShadow({ mode: "open" });
root.innerHTML = `<style>:host{position:fixed;top:4px;left:4px;z-index:2147483647;height:0}#i{display:none}*{float:left;padding:0 1em;margin:4px;font-size:14px;line-height:2em;color:#fff;user-select:none;background:#28e;border:1px solid #fffa;border-radius:8px;transition:.3s}[for]~:active{filter:brightness(1.1);transition:0s}:checked~*{opacity:.3;transform:translateY(-3em)}:checked+*{transform:translateY(3em)}</style><input id=i type=checkbox><label for=i>‍</label>`;
document.addFloatButton = (text, onclick) => {
const el = document.createElement("label");
el.textContent = text;
el.addEventListener("click", onclick);
return root.appendChild(el);
};
}
return document.addFloatButton(text, onclick);
},
fetchex(url, type) /* 20220509-1838 */ {
// @grant GM_xmlhttpRequest
if (self.GM_xmlhttpRequest)
return new Promise((resolve, onerror) => {
const onload = (e) => resolve(e.response);
GM_xmlhttpRequest({ url, responseType: type, onload, onerror });
});
else return fetch(url).then((v) => v[type]());
},
};
// TODO: Content Security Policy. Example: https://github.com/kkocdko/kblog
addFloatButton("Remove images", async function () {
const placeholder = `data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10"></svg>`;
document.querySelectorAll("img").forEach((el) => {
el.src = placeholder;
});
this.textContent = "Images removed";
this.style.background = "#4caf50";
});
addFloatButton("Save page", async function () {
console.time("save page");
this.style.background = "#ff9800";
const interval = setInterval((o) => {
const suffix = ".".padStart((++o.i % 3) + 1, " ").padEnd(3, " ");
this.innerHTML = "Saving " + suffix.replace(/\s/g, " ");
}, ...[333, { i: 0 }]); // 茴回囘囬
const /** @type {Document} */ dom = document.cloneNode(true);
const removeList = `script, style, source, title, link`;
dom.querySelectorAll(removeList).forEach((el) => el.remove());
const qsam = (s, f) => [...document.querySelectorAll(s)].map(f);
const imgs = dom.querySelectorAll("img");
const imgTasks = qsam("img", async (el, i) => {
const reader = new FileReader();
reader.readAsDataURL(await fetchex(el.currentSrc, "blob"));
await new Promise((r) => (reader.onload = reader.onerror = r));
imgs[i].src = reader.result;
imgs[i].srcset = "";
});
const css = []; // Keep order
const cssTasks = qsam("style, link[rel=stylesheet]", async (el, i) => {
if (el.tagName === "STYLE") css[i] = el.textContent;
else css[i] = await fetchex(el.href, "text");
});
await Promise.allSettled([...imgTasks, ...cssTasks]);
// [TODO:Limitation] `url()` and `image-set()` in css will not be save
// Avoid the long-loading issue
const cssStr = css
.filter((v) => !v.slice(0, 128).includes("<!DOCTYPE")) // exclude some invalid resources
.join("\n\n")
.replace(/(url|image-set)(.+?)/g, "url()");
dom.head.appendChild(dom.createElement("style")).textContent = cssStr;
console.log({ cssStr });
dom.querySelectorAll("a").forEach((el) => {
// "a:not([href^='http']):not([href^='//'])"
el.setAttribute("href", el.href); // make links absolute
});
// [TODO:Limitation] breaked some no-doctype / xhtml / html4 pages
const result = "<!DOCTYPE html>" + dom.documentElement.outerHTML;
console.timeEnd("save page");
clearInterval(interval);
const link = document.createElement("a"); // Using `dom` will cause failure
link.download = `${document.title}_${Date.now()}.html`;
link.href = "data:text/html," + encodeURIComponent(result);
link.click();
this.textContent = "Page saved";
this.style.background = "#4caf50";
});