56 lines
1.5 KiB
JavaScript
56 lines
1.5 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const NormalModule = require("../NormalModule");
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/** @typedef {import("../Compiler")} Compiler */
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// data URL scheme: "data:text/javascript;charset=utf-8;base64,some-string"
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// http://www.ietf.org/rfc/rfc2397.txt
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const URIRegEx = /^data:(?:[^;,]+)?(?:(?:;[^;,]+)*?)(;base64)?,(.*)$/i;
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const URIMetaRegEx = /^data:([^;,]+)?(?:(?:;[^;,]+)*?)(?:;(base64))?,/i;
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const decodeDataURI = uri => {
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const match = URIRegEx.exec(uri);
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if (!match) return null;
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const isBase64 = match[1];
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const body = match[2];
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return isBase64
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? Buffer.from(body, "base64")
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: Buffer.from(decodeURIComponent(body), "ascii");
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};
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class DataUriPlugin {
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/**
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* Apply the plugin
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* @param {Compiler} compiler the compiler instance
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* @returns {void}
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*/
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apply(compiler) {
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compiler.hooks.compilation.tap(
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"DataUriPlugin",
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(compilation, { normalModuleFactory }) => {
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normalModuleFactory.hooks.resolveForScheme
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.for("data")
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.tap("DataUriPlugin", resourceData => {
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const match = URIMetaRegEx.exec(resourceData.resource);
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if (match) {
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resourceData.data.mimetype = match[1] || "";
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resourceData.data.encoding = match[2] || false;
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}
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});
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NormalModule.getCompilationHooks(compilation)
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.readResourceForScheme.for("data")
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.tap("DataUriPlugin", resource => decodeDataURI(resource));
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}
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);
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}
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}
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module.exports = DataUriPlugin;
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