webpack
Version:
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
66 lines (55 loc) • 1.89 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
;
const NormalModule = require("../NormalModule");
/** @typedef {import("../Compiler")} Compiler */
// data URL scheme: "data:text/javascript;charset=utf-8;base64,some-string"
// http://www.ietf.org/rfc/rfc2397.txt
const URIRegEx = /^data:([^;,]+)?((?:;[^;,]+)*?)(?:;(base64))?,(.*)$/i;
const decodeDataURI = uri => {
const match = URIRegEx.exec(uri);
if (!match) return null;
const isBase64 = match[3];
const body = match[4];
if (isBase64) {
return Buffer.from(body, "base64");
}
// CSS allows to use `data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg"><rect width="100%" height="100%" style="stroke: rgb(223,224,225); stroke-width: 2px; fill: none; stroke-dasharray: 6px 3px" /></svg>`
// so we return original body if we can't `decodeURIComponent`
try {
return Buffer.from(decodeURIComponent(body), "ascii");
} catch (_) {
return Buffer.from(body, "ascii");
}
};
class DataUriPlugin {
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
compiler.hooks.compilation.tap(
"DataUriPlugin",
(compilation, { normalModuleFactory }) => {
normalModuleFactory.hooks.resolveForScheme
.for("data")
.tap("DataUriPlugin", resourceData => {
const match = URIRegEx.exec(resourceData.resource);
if (match) {
resourceData.data.mimetype = match[1] || "";
resourceData.data.parameters = match[2] || "";
resourceData.data.encoding = match[3] || false;
resourceData.data.encodedContent = match[4] || "";
}
});
NormalModule.getCompilationHooks(compilation)
.readResourceForScheme.for("data")
.tap("DataUriPlugin", resource => decodeDataURI(resource));
}
);
}
}
module.exports = DataUriPlugin;