212 lines
9.8 KiB
TypeScript
212 lines
9.8 KiB
TypeScript
/*
|
|
* Vencord, a modification for Discord's desktop app
|
|
* Copyright (c) 2022 Vendicated and contributors
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
import { WEBPACK_CHUNK } from "../utils/constants";
|
|
import Logger from "../utils/logger";
|
|
import { _initWebpack } from ".";
|
|
|
|
let webpackChunk: any[];
|
|
|
|
const logger = new Logger("WebpackInterceptor", "#8caaee");
|
|
|
|
Object.defineProperty(window, WEBPACK_CHUNK, {
|
|
get: () => webpackChunk,
|
|
set: v => {
|
|
if (v?.push !== Array.prototype.push) {
|
|
logger.info(`Patching ${WEBPACK_CHUNK}.push`);
|
|
_initWebpack(v);
|
|
patchPush();
|
|
// @ts-ignore
|
|
delete window[WEBPACK_CHUNK];
|
|
window[WEBPACK_CHUNK] = v;
|
|
}
|
|
webpackChunk = v;
|
|
},
|
|
configurable: true
|
|
});
|
|
|
|
function patchPush() {
|
|
function handlePush(chunk: any) {
|
|
try {
|
|
const modules = chunk[1];
|
|
const { subscriptions, listeners } = Vencord.Webpack;
|
|
const { patches } = Vencord.Plugins;
|
|
|
|
for (const id in modules) {
|
|
let mod = modules[id];
|
|
// Discords Webpack chunks for some ungodly reason contain random
|
|
// newlines. Cyn recommended this workaround and it seems to work fine,
|
|
// however this could potentially break code, so if anything goes weird,
|
|
// this is probably why.
|
|
// Additionally, `[actual newline]` is one less char than "\n", so if Discord
|
|
// ever targets newer browsers, the minifier could potentially use this trick and
|
|
// cause issues.
|
|
let code: string = mod.toString().replaceAll("\n", "");
|
|
// a very small minority of modules use function() instead of arrow functions,
|
|
// but, unnamed toplevel functions aren't valid. However 0, function() makes it a statement
|
|
if (code.startsWith("function(")) {
|
|
code = "0," + code;
|
|
}
|
|
const originalMod = mod;
|
|
const patchedBy = new Set();
|
|
|
|
const factory = modules[id] = function (module, exports, require) {
|
|
try {
|
|
mod(module, exports, require);
|
|
} catch (err) {
|
|
// Just rethrow discord errors
|
|
if (mod === originalMod) throw err;
|
|
|
|
logger.error("Error in patched chunk", err);
|
|
return void originalMod(module, exports, require);
|
|
}
|
|
|
|
// There are (at the time of writing) 11 modules exporting the window
|
|
// Make these non enumerable to improve webpack search performance
|
|
if (module.exports === window) {
|
|
Object.defineProperty(require.c, id, {
|
|
value: require.c[id],
|
|
enumerable: false,
|
|
configurable: true,
|
|
writable: true
|
|
});
|
|
return;
|
|
}
|
|
|
|
for (const callback of listeners) {
|
|
try {
|
|
callback(exports);
|
|
} catch (err) {
|
|
logger.error("Error in webpack listener", err);
|
|
}
|
|
}
|
|
|
|
for (const [filter, callback] of subscriptions) {
|
|
try {
|
|
if (filter(exports)) {
|
|
subscriptions.delete(filter);
|
|
callback(exports);
|
|
} else if (typeof exports === "object") {
|
|
if (exports.default && filter(exports.default)) {
|
|
subscriptions.delete(filter);
|
|
callback(exports.default);
|
|
}
|
|
|
|
for (const nested in exports) if (nested.length <= 3) {
|
|
if (exports[nested] && filter(exports[nested])) {
|
|
subscriptions.delete(filter);
|
|
callback(exports[nested]);
|
|
}
|
|
}
|
|
}
|
|
} catch (err) {
|
|
logger.error("Error while firing callback for webpack chunk", err);
|
|
}
|
|
}
|
|
} as any as { toString: () => string, original: any, (...args: any[]): void; };
|
|
|
|
// for some reason throws some error on which calling .toString() leads to infinite recursion
|
|
// when you force load all chunks???
|
|
try {
|
|
factory.toString = () => mod.toString();
|
|
factory.original = originalMod;
|
|
} catch { }
|
|
|
|
for (let i = 0; i < patches.length; i++) {
|
|
const patch = patches[i];
|
|
if (patch.predicate && !patch.predicate()) continue;
|
|
|
|
if (code.includes(patch.find)) {
|
|
patchedBy.add(patch.plugin);
|
|
|
|
// @ts-ignore we change all patch.replacement to array in plugins/index
|
|
for (const replacement of patch.replacement) {
|
|
const lastMod = mod;
|
|
const lastCode = code;
|
|
|
|
try {
|
|
const newCode = code.replace(replacement.match, replacement.replace);
|
|
if (newCode === code && !replacement.noWarn) {
|
|
logger.warn(`Patch by ${patch.plugin} had no effect (Module id is ${id}): ${replacement.match}`);
|
|
if (IS_DEV) {
|
|
logger.debug("Function Source:\n", code);
|
|
}
|
|
} else {
|
|
code = newCode;
|
|
mod = (0, eval)(`// Webpack Module ${id} - Patched by ${[...patchedBy].join(", ")}\n${newCode}\n//# sourceURL=WebpackModule${id}`);
|
|
}
|
|
} catch (err) {
|
|
logger.error(`Patch by ${patch.plugin} errored (Module id is ${id}): ${replacement.match}\n`, err);
|
|
|
|
if (IS_DEV) {
|
|
const changeSize = code.length - lastCode.length;
|
|
const match = lastCode.match(replacement.match)!;
|
|
|
|
// Use 200 surrounding characters of context
|
|
const start = Math.max(0, match.index! - 200);
|
|
const end = Math.min(lastCode.length, match.index! + match[0].length + 200);
|
|
// (changeSize may be negative)
|
|
const endPatched = end + changeSize;
|
|
|
|
const context = lastCode.slice(start, end);
|
|
const patchedContext = code.slice(start, endPatched);
|
|
|
|
// inline require to avoid including it in !IS_DEV builds
|
|
const diff = (require("diff") as typeof import("diff")).diffWordsWithSpace(context, patchedContext);
|
|
let fmt = "%c %s ";
|
|
const elements = [] as string[];
|
|
for (const d of diff) {
|
|
const color = d.removed
|
|
? "red"
|
|
: d.added
|
|
? "lime"
|
|
: "grey";
|
|
fmt += "%c%s";
|
|
elements.push("color:" + color, d.value);
|
|
}
|
|
|
|
logger.errorCustomFmt(...Logger.makeTitle("white", "Before"), context);
|
|
logger.errorCustomFmt(...Logger.makeTitle("white", "After"), context);
|
|
const [titleFmt, ...titleElements] = Logger.makeTitle("white", "Diff");
|
|
logger.errorCustomFmt(titleFmt + fmt, ...titleElements, ...elements);
|
|
}
|
|
code = lastCode;
|
|
mod = lastMod;
|
|
patchedBy.delete(patch.plugin);
|
|
}
|
|
}
|
|
|
|
if (!patch.all) patches.splice(i--, 1);
|
|
}
|
|
}
|
|
}
|
|
} catch (err) {
|
|
logger.error("Error in handlePush", err);
|
|
}
|
|
|
|
return handlePush.original.call(window[WEBPACK_CHUNK], chunk);
|
|
}
|
|
|
|
handlePush.original = window[WEBPACK_CHUNK].push;
|
|
Object.defineProperty(window[WEBPACK_CHUNK], "push", {
|
|
get: () => handlePush,
|
|
set: v => (handlePush.original = v),
|
|
configurable: true
|
|
});
|
|
}
|