47 lines
1.3 KiB
JavaScript
47 lines
1.3 KiB
JavaScript
import etag from 'etag';
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import cheerio from 'cheerio';
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import getContentTypeHeader from '../utils/getContentTypeHeader.js';
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import rewriteBareModuleIdentifiers from '../utils/rewriteBareModuleIdentifiers.js';
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export default function serveHTMLModule(req, res) {
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try {
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const $ = cheerio.load(req.entry.content.toString('utf8'));
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$('script[type=module]').each((index, element) => {
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$(element).html(
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rewriteBareModuleIdentifiers($(element).html(), req.packageConfig)
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);
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});
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const code = $.html();
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res
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.set({
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'Content-Length': Buffer.byteLength(code),
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'Content-Type': getContentTypeHeader(req.entry.contentType),
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'Cache-Control': 'public, max-age=31536000', // 1 year
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ETag: etag(code),
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'Cache-Tag': 'file, html-file, html-module'
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})
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.send(code);
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} catch (error) {
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console.error(error);
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const errorName = error.constructor.name;
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const errorMessage = error.message.replace(
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/^.*?\/unpkg-.+?\//,
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`/${req.packageSpec}/`
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);
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const codeFrame = error.codeFrame;
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const debugInfo = `${errorName}: ${errorMessage}\n\n${codeFrame}`;
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res
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.status(500)
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.type('text')
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.send(
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`Cannot generate module for ${req.packageSpec}${req.filename}\n\n${debugInfo}`
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);
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}
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}
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