GoScrobble/web/node_modules/workbox-routing/RegExpRoute.js

76 lines
3.1 KiB
JavaScript

/*
Copyright 2018 Google LLC
Use of this source code is governed by an MIT-style
license that can be found in the LICENSE file or at
https://opensource.org/licenses/MIT.
*/
import { assert } from 'workbox-core/_private/assert.js';
import { logger } from 'workbox-core/_private/logger.js';
import { Route } from './Route.js';
import './_version.js';
/**
* RegExpRoute makes it easy to create a regular expression based
* [Route]{@link module:workbox-routing.Route}.
*
* For same-origin requests the RegExp only needs to match part of the URL. For
* requests against third-party servers, you must define a RegExp that matches
* the start of the URL.
*
* [See the module docs for info.]{@link https://developers.google.com/web/tools/workbox/modules/workbox-routing}
*
* @memberof module:workbox-routing
* @extends module:workbox-routing.Route
*/
class RegExpRoute extends Route {
/**
* If the regular expression contains
* [capture groups]{@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp#grouping-back-references},
* the captured values will be passed to the
* [handler's]{@link module:workbox-routing~handlerCallback} `params`
* argument.
*
* @param {RegExp} regExp The regular expression to match against URLs.
* @param {module:workbox-routing~handlerCallback} handler A callback
* function that returns a Promise resulting in a Response.
* @param {string} [method='GET'] The HTTP method to match the Route
* against.
*/
constructor(regExp, handler, method) {
if (process.env.NODE_ENV !== 'production') {
assert.isInstance(regExp, RegExp, {
moduleName: 'workbox-routing',
className: 'RegExpRoute',
funcName: 'constructor',
paramName: 'pattern',
});
}
const match = ({ url }) => {
const result = regExp.exec(url.href);
// Return immediately if there's no match.
if (!result) {
return;
}
// Require that the match start at the first character in the URL string
// if it's a cross-origin request.
// See https://github.com/GoogleChrome/workbox/issues/281 for the context
// behind this behavior.
if ((url.origin !== location.origin) && (result.index !== 0)) {
if (process.env.NODE_ENV !== 'production') {
logger.debug(`The regular expression '${regExp}' only partially matched ` +
`against the cross-origin URL '${url}'. RegExpRoute's will only ` +
`handle cross-origin requests if they match the entire URL.`);
}
return;
}
// If the route matches, but there aren't any capture groups defined, then
// this will return [], which is truthy and therefore sufficient to
// indicate a match.
// If there are capture groups, then it will return their values.
return result.slice(1);
};
super(match, handler, method);
}
}
export { RegExpRoute };