32 lines
744 B
JavaScript
32 lines
744 B
JavaScript
const fs = require('fs');
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const invariant = require('invariant');
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const createAssets = require('./utils/createAssets');
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/**
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* An express middleware that sets req.assets from the build
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* info in the given stats file. Should be used in production.
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*/
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function staticAssets(webpackStatsFile) {
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let stats;
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try {
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stats = JSON.parse(fs.readFileSync(webpackStatsFile, 'utf8'));
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} catch (error) {
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invariant(
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false,
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'staticAssets middleware cannot read the build stats in %s; ' +
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'run the `build` script before starting the server',
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webpackStatsFile
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);
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}
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const assets = createAssets(stats);
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return (req, res, next) => {
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req.assets = assets;
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next();
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};
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}
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module.exports = staticAssets;
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