next
Version:
The React Framework
43 lines (42 loc) • 1.99 kB
JavaScript
import { webpack, sources } from 'next/dist/compiled/webpack/webpack';
import crypto from 'crypto';
import { SUBRESOURCE_INTEGRITY_MANIFEST } from '../../../shared/lib/constants';
const PLUGIN_NAME = 'SubresourceIntegrityPlugin';
export class SubresourceIntegrityPlugin {
constructor(algorithm){
this.algorithm = algorithm;
}
apply(compiler) {
compiler.hooks.make.tap(PLUGIN_NAME, (compilation)=>{
compilation.hooks.afterOptimizeAssets.tap({
name: PLUGIN_NAME,
stage: webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONS
}, (assets)=>{
// Collect all the assets.
let files = new Set();
for (const asset of compilation.getAssets()){
files.add(asset.name);
}
// For each file, deduped, calculate the file hash.
const hashes = {};
for (const file of files.values()){
// Get the buffer for the asset.
const asset = assets[file];
if (!asset) {
throw new Error(`could not get asset: ${file}`);
}
// Get the buffer for the asset.
const buffer = asset.buffer();
// Create the hash for the content.
const hash = crypto.createHash(this.algorithm).update(buffer).digest().toString('base64');
hashes[file] = `${this.algorithm}-${hash}`;
}
const json = JSON.stringify(hashes, null, 2);
const file = 'server/' + SUBRESOURCE_INTEGRITY_MANIFEST;
assets[file + '.js'] = new sources.RawSource(`self.__SUBRESOURCE_INTEGRITY_MANIFEST=${JSON.stringify(json)}`);
assets[file + '.json'] = new sources.RawSource(json);
});
});
}
}
//# sourceMappingURL=subresource-integrity-plugin.js.map