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/*
* Vencord, a modification for Discord's desktop app
* Copyright (c) 2023 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 { app, protocol, session } from "electron";
import { join } from "path";
import { getSettings } from "./ipcMain";
import { IS_VANILLA } from "./utils/constants";
import { installExt } from "./utils/extensions";
if (IS_VENCORD_DESKTOP || !IS_VANILLA) {
app.whenReady().then(() => {
// Source Maps! Maybe there's a better way but since the renderer is executed
// from a string I don't think any other form of sourcemaps would work
protocol.registerFileProtocol("vencord", ({ url: unsafeUrl }, cb) => {
let url = unsafeUrl.slice("vencord://".length);
if (url.endsWith("/")) url = url.slice(0, -1);
switch (url) {
case "renderer.js.map":
case "preload.js.map":
case "patcher.js.map": // doubt
cb(join(__dirname, url));
break;
default:
cb({ statusCode: 403 });
}
});
try {
if (getSettings().enableReactDevtools)
installExt("fmkadmapgofadopljbjfkapdkoienihi")
.then(() => console.info("[Vencord] Installed React Developer Tools"))
.catch(err => console.error("[Vencord] Failed to install React Developer Tools", err));
} catch { }
// Remove CSP
type PolicyResult = Record<string, string[]>;
const parsePolicy = (policy: string): PolicyResult => {
const result: PolicyResult = {};
policy.split(";").forEach(directive => {
const [directiveKey, ...directiveValue] = directive.trim().split(/\s+/g);
if (directiveKey && !Object.prototype.hasOwnProperty.call(result, directiveKey)) {
result[directiveKey] = directiveValue;
}
});
return result;
};
const stringifyPolicy = (policy: PolicyResult): string =>
Object.entries(policy)
.filter(([, values]) => values?.length)
.map(directive => directive.flat().join(" "))
.join("; ");
function patchCsp(headers: Record<string, string[]>, header: string) {
if (header in headers) {
const csp = parsePolicy(headers[header][0]);
for (const directive of ["style-src", "connect-src", "img-src", "font-src", "media-src", "worker-src"]) {
csp[directive] = ["*", "blob:", "data:", "'unsafe-inline'"];
}
// TODO: Restrict this to only imported packages with fixed version.
// Perhaps auto generate with esbuild
csp["script-src"] ??= [];
csp["script-src"].push("'unsafe-eval'", "https://unpkg.com", "https://cdnjs.cloudflare.com");
headers[header] = [stringifyPolicy(csp)];
}
}
session.defaultSession.webRequest.onHeadersReceived(({ responseHeaders, resourceType }, cb) => {
if (responseHeaders) {
if (resourceType === "mainFrame")
patchCsp(responseHeaders, "content-security-policy");
// Fix hosts that don't properly set the css content type, such as
// raw.githubusercontent.com
if (resourceType === "stylesheet")
responseHeaders["content-type"] = ["text/css"];
}
cb({ cancel: false, responseHeaders });
});
// assign a noop to onHeadersReceived to prevent other mods from adding their own incompatible ones.
// For instance, OpenAsar adds their own that doesn't fix content-type for stylesheets which makes it
// impossible to load css from github raw despite our fix above
session.defaultSession.webRequest.onHeadersReceived = () => { };
});
}
if (IS_DISCORD_DESKTOP) {
require("./patcher");
}
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