51 lines
1.4 KiB
JavaScript
51 lines
1.4 KiB
JavaScript
const etag = require("etag");
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const cheerio = require("cheerio");
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const getContentTypeHeader = require("../utils/getContentTypeHeader");
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const rewriteBareModuleIdentifiers = require("../utils/rewriteBareModuleIdentifiers");
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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 = $.html();
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res
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.set({
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"Content-Length": Buffer.byteLength(code),
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"Content-Type": getContentTypeHeader(req.entry.contentType),
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"Cache-Control": "public, max-age=31536000, immutable", // 1 year
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ETag: etag(code),
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"Cache-Tag": "file, html-file, html-module"
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})
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.send(code);
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} catch (error) {
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console.error(error);
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const errorName = error.constructor.name;
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const errorMessage = error.message.replace(
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/^.*?\/unpkg-.+?\//,
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`/${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 ${req.packageSpec}${
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req.filename
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}\n\n${debugInfo}`
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);
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}
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}
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module.exports = serveHTMLModule;
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