GoScrobble/web/node_modules/react-dev-utils/evalSourceMapMiddleware.js

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2022-04-25 02:47:15 +00:00
/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
function base64SourceMap(source) {
const base64 = Buffer.from(JSON.stringify(source.map()), 'utf8').toString(
'base64'
);
return `data:application/json;charset=utf-8;base64,${base64}`;
}
function getSourceById(server, id) {
const module = server._stats.compilation.modules.find(m => m.id == id);
return module.originalSource();
}
/*
* Middleware responsible for retrieving a generated source
* Receives a webpack internal url: "webpack-internal:///<module-id>"
* Returns a generated source: "<source-text><sourceMappingURL><sourceURL>"
*
* Based on EvalSourceMapDevToolModuleTemplatePlugin.js
*/
module.exports = function createEvalSourceMapMiddleware(server) {
return function handleWebpackInternalMiddleware(req, res, next) {
if (req.url.startsWith('/__get-internal-source')) {
const fileName = req.query.fileName;
const id = fileName.match(/webpack-internal:\/\/\/(.+)/)[1];
if (!id || !server._stats) {
next();
}
const source = getSourceById(server, id);
const sourceMapURL = `//# sourceMappingURL=${base64SourceMap(source)}`;
const sourceURL = `//# sourceURL=webpack-internal:///${module.id}`;
res.end(`${source.source()}\n${sourceMapURL}\n${sourceURL}`);
} else {
next();
}
};
};