workbox-routing.dev.js
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this.workbox = this.workbox || {};
this.workbox.routing = (function (exports, assert_js, logger_js, WorkboxError_js, getFriendlyURL_js) {
'use strict';
try {
self['workbox:routing:5.1.4'] && _();
} catch (e) {}
/*
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.
*/
/**
* The default HTTP method, 'GET', used when there's no specific method
* configured for a route.
*
* @type {string}
*
* @private
*/
const defaultMethod = 'GET';
/**
* The list of valid HTTP methods associated with requests that could be routed.
*
* @type {Array<string>}
*
* @private
*/
const validMethods = ['DELETE', 'GET', 'HEAD', 'PATCH', 'POST', 'PUT'];
/*
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.
*/
/**
* @param {function()|Object} handler Either a function, or an object with a
* 'handle' method.
* @return {Object} An object with a handle method.
*
* @private
*/
const normalizeHandler = handler => {
if (handler && typeof handler === 'object') {
{
assert_js.assert.hasMethod(handler, 'handle', {
moduleName: 'workbox-routing',
className: 'Route',
funcName: 'constructor',
paramName: 'handler'
});
}
return handler;
} else {
{
assert_js.assert.isType(handler, 'function', {
moduleName: 'workbox-routing',
className: 'Route',
funcName: 'constructor',
paramName: 'handler'
});
}
return {
handle: handler
};
}
};
/*
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.
*/
/**
* A `Route` consists of a pair of callback functions, "match" and "handler".
* The "match" callback determine if a route should be used to "handle" a
* request by returning a non-falsy value if it can. The "handler" callback
* is called when there is a match and should return a Promise that resolves
* to a `Response`.
*
* @memberof module:workbox-routing
*/
class Route {
/**
* Constructor for Route class.
*
* @param {module:workbox-routing~matchCallback} match
* A callback function that determines whether the route matches a given
* `fetch` event by returning a non-falsy value.
* @param {module:workbox-routing~handlerCallback} handler A callback
* function that returns a Promise resolving to a Response.
* @param {string} [method='GET'] The HTTP method to match the Route
* against.
*/
constructor(match, handler, method = defaultMethod) {
{
assert_js.assert.isType(match, 'function', {
moduleName: 'workbox-routing',
className: 'Route',
funcName: 'constructor',
paramName: 'match'
});
if (method) {
assert_js.assert.isOneOf(method, validMethods, {
paramName: 'method'
});
}
} // These values are referenced directly by Router so cannot be
// altered by minificaton.
this.handler = normalizeHandler(handler);
this.match = match;
this.method = method;
}
}
/*
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.
*/
/**
* NavigationRoute makes it easy to create a
* [Route]{@link module:workbox-routing.Route} that matches for browser
* [navigation requests]{@link https://developers.google.com/web/fundamentals/primers/service-workers/high-performance-loading#first_what_are_navigation_requests}.
*
* It will only match incoming Requests whose
* [`mode`]{@link https://fetch.spec.whatwg.org/#concept-request-mode}
* is set to `navigate`.
*
* You can optionally only apply this route to a subset of navigation requests
* by using one or both of the `denylist` and `allowlist` parameters.
*
* @memberof module:workbox-routing
* @extends module:workbox-routing.Route
*/
class NavigationRoute extends Route {
/**
* If both `denylist` and `allowlist` are provided, the `denylist` will
* take precedence and the request will not match this route.
*
* The regular expressions in `allowlist` and `denylist`
* are matched against the concatenated
* [`pathname`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/pathname}
* and [`search`]{@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/search}
* portions of the requested URL.
*
* @param {module:workbox-routing~handlerCallback} handler A callback
* function that returns a Promise resulting in a Response.
* @param {Object} options
* @param {Array<RegExp>} [options.denylist] If any of these patterns match,
* the route will not handle the request (even if a allowlist RegExp matches).
* @param {Array<RegExp>} [options.allowlist=[/./]] If any of these patterns
* match the URL's pathname and search parameter, the route will handle the
* request (assuming the denylist doesn't match).
*/
constructor(handler, {
allowlist = [/./],
denylist = []
} = {}) {
{
assert_js.assert.isArrayOfClass(allowlist, RegExp, {
moduleName: 'workbox-routing',
className: 'NavigationRoute',
funcName: 'constructor',
paramName: 'options.allowlist'
});
assert_js.assert.isArrayOfClass(denylist, RegExp, {
moduleName: 'workbox-routing',
className: 'NavigationRoute',
funcName: 'constructor',
paramName: 'options.denylist'
});
}
super(options => this._match(options), handler);
this._allowlist = allowlist;
this._denylist = denylist;
}
/**
* Routes match handler.
*
* @param {Object} options
* @param {URL} options.url
* @param {Request} options.request
* @return {boolean}
*
* @private
*/
_match({
url,
request
}) {
if (request && request.mode !== 'navigate') {
return false;
}
const pathnameAndSearch = url.pathname + url.search;
for (const regExp of this._denylist) {
if (regExp.test(pathnameAndSearch)) {
{
logger_js.logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL matches this denylist pattern: ` + `${regExp}`);
}
return false;
}
}
if (this._allowlist.some(regExp => regExp.test(pathnameAndSearch))) {
{
logger_js.logger.debug(`The navigation route ${pathnameAndSearch} ` + `is being used.`);
}
return true;
}
{
logger_js.logger.log(`The navigation route ${pathnameAndSearch} is not ` + `being used, since the URL being navigated to doesn't ` + `match the allowlist.`);
}
return false;
}
}
/*
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.
*/
/**
* 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) {
{
assert_js.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) {
{
logger_js.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);
}
}
/*
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.
*/
/**
* The Router can be used to process a FetchEvent through one or more
* [Routes]{@link module:workbox-routing.Route} responding with a Request if
* a matching route exists.
*
* If no route matches a given a request, the Router will use a "default"
* handler if one is defined.
*
* Should the matching Route throw an error, the Router will use a "catch"
* handler if one is defined to gracefully deal with issues and respond with a
* Request.
*
* If a request matches multiple routes, the **earliest** registered route will
* be used to respond to the request.
*
* @memberof module:workbox-routing
*/
class Router {
/**
* Initializes a new Router.
*/
constructor() {
this._routes = new Map();
}
/**
* @return {Map<string, Array<module:workbox-routing.Route>>} routes A `Map` of HTTP
* method name ('GET', etc.) to an array of all the corresponding `Route`
* instances that are registered.
*/
get routes() {
return this._routes;
}
/**
* Adds a fetch event listener to respond to events when a route matches
* the event's request.
*/
addFetchListener() {
// See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
self.addEventListener('fetch', event => {
const {
request
} = event;
const responsePromise = this.handleRequest({
request,
event
});
if (responsePromise) {
event.respondWith(responsePromise);
}
});
}
/**
* Adds a message event listener for URLs to cache from the window.
* This is useful to cache resources loaded on the page prior to when the
* service worker started controlling it.
*
* The format of the message data sent from the window should be as follows.
* Where the `urlsToCache` array may consist of URL strings or an array of
* URL string + `requestInit` object (the same as you'd pass to `fetch()`).
*
* ```
* {
* type: 'CACHE_URLS',
* payload: {
* urlsToCache: [
* './script1.js',
* './script2.js',
* ['./script3.js', {mode: 'no-cors'}],
* ],
* },
* }
* ```
*/
addCacheListener() {
// See https://github.com/Microsoft/TypeScript/issues/28357#issuecomment-436484705
self.addEventListener('message', event => {
if (event.data && event.data.type === 'CACHE_URLS') {
const {
payload
} = event.data;
{
logger_js.logger.debug(`Caching URLs from the window`, payload.urlsToCache);
}
const requestPromises = Promise.all(payload.urlsToCache.map(entry => {
if (typeof entry === 'string') {
entry = [entry];
}
const request = new Request(...entry);
return this.handleRequest({
request
}); // TODO(philipwalton): TypeScript errors without this typecast for
// some reason (probably a bug). The real type here should work but
// doesn't: `Array<Promise<Response> | undefined>`.
})); // TypeScript
event.waitUntil(requestPromises); // If a MessageChannel was used, reply to the message on success.
if (event.ports && event.ports[0]) {
requestPromises.then(() => event.ports[0].postMessage(true));
}
}
});
}
/**
* Apply the routing rules to a FetchEvent object to get a Response from an
* appropriate Route's handler.
*
* @param {Object} options
* @param {Request} options.request The request to handle (this is usually
* from a fetch event, but it does not have to be).
* @param {FetchEvent} [options.event] The event that triggered the request,
* if applicable.
* @return {Promise<Response>|undefined} A promise is returned if a
* registered route can handle the request. If there is no matching
* route and there's no `defaultHandler`, `undefined` is returned.
*/
handleRequest({
request,
event
}) {
{
assert_js.assert.isInstance(request, Request, {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'handleRequest',
paramName: 'options.request'
});
}
const url = new URL(request.url, location.href);
if (!url.protocol.startsWith('http')) {
{
logger_js.logger.debug(`Workbox Router only supports URLs that start with 'http'.`);
}
return;
}
const {
params,
route
} = this.findMatchingRoute({
url,
request,
event
});
let handler = route && route.handler;
const debugMessages = [];
{
if (handler) {
debugMessages.push([`Found a route to handle this request:`, route]);
if (params) {
debugMessages.push([`Passing the following params to the route's handler:`, params]);
}
}
} // If we don't have a handler because there was no matching route, then
// fall back to defaultHandler if that's defined.
if (!handler && this._defaultHandler) {
{
debugMessages.push(`Failed to find a matching route. Falling ` + `back to the default handler.`);
}
handler = this._defaultHandler;
}
if (!handler) {
{
// No handler so Workbox will do nothing. If logs is set of debug
// i.e. verbose, we should print out this information.
logger_js.logger.debug(`No route found for: ${getFriendlyURL_js.getFriendlyURL(url)}`);
}
return;
}
{
// We have a handler, meaning Workbox is going to handle the route.
// print the routing details to the console.
logger_js.logger.groupCollapsed(`Router is responding to: ${getFriendlyURL_js.getFriendlyURL(url)}`);
debugMessages.forEach(msg => {
if (Array.isArray(msg)) {
logger_js.logger.log(...msg);
} else {
logger_js.logger.log(msg);
}
});
logger_js.logger.groupEnd();
} // Wrap in try and catch in case the handle method throws a synchronous
// error. It should still callback to the catch handler.
let responsePromise;
try {
responsePromise = handler.handle({
url,
request,
event,
params
});
} catch (err) {
responsePromise = Promise.reject(err);
}
if (responsePromise instanceof Promise && this._catchHandler) {
responsePromise = responsePromise.catch(err => {
{
// Still include URL here as it will be async from the console group
// and may not make sense without the URL
logger_js.logger.groupCollapsed(`Error thrown when responding to: ` + ` ${getFriendlyURL_js.getFriendlyURL(url)}. Falling back to Catch Handler.`);
logger_js.logger.error(`Error thrown by:`, route);
logger_js.logger.error(err);
logger_js.logger.groupEnd();
}
return this._catchHandler.handle({
url,
request,
event
});
});
}
return responsePromise;
}
/**
* Checks a request and URL (and optionally an event) against the list of
* registered routes, and if there's a match, returns the corresponding
* route along with any params generated by the match.
*
* @param {Object} options
* @param {URL} options.url
* @param {Request} options.request The request to match.
* @param {Event} [options.event] The corresponding event (unless N/A).
* @return {Object} An object with `route` and `params` properties.
* They are populated if a matching route was found or `undefined`
* otherwise.
*/
findMatchingRoute({
url,
request,
event
}) {
{
assert_js.assert.isInstance(url, URL, {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'findMatchingRoute',
paramName: 'options.url'
});
assert_js.assert.isInstance(request, Request, {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'findMatchingRoute',
paramName: 'options.request'
});
}
const routes = this._routes.get(request.method) || [];
for (const route of routes) {
let params;
const matchResult = route.match({
url,
request,
event
});
if (matchResult) {
// See https://github.com/GoogleChrome/workbox/issues/2079
params = matchResult;
if (Array.isArray(matchResult) && matchResult.length === 0) {
// Instead of passing an empty array in as params, use undefined.
params = undefined;
} else if (matchResult.constructor === Object && Object.keys(matchResult).length === 0) {
// Instead of passing an empty object in as params, use undefined.
params = undefined;
} else if (typeof matchResult === 'boolean') {
// For the boolean value true (rather than just something truth-y),
// don't set params.
// See https://github.com/GoogleChrome/workbox/pull/2134#issuecomment-513924353
params = undefined;
} // Return early if have a match.
return {
route,
params
};
}
} // If no match was found above, return and empty object.
return {};
}
/**
* Define a default `handler` that's called when no routes explicitly
* match the incoming request.
*
* Without a default handler, unmatched requests will go against the
* network as if there were no service worker present.
*
* @param {module:workbox-routing~handlerCallback} handler A callback
* function that returns a Promise resulting in a Response.
*/
setDefaultHandler(handler) {
this._defaultHandler = normalizeHandler(handler);
}
/**
* If a Route throws an error while handling a request, this `handler`
* will be called and given a chance to provide a response.
*
* @param {module:workbox-routing~handlerCallback} handler A callback
* function that returns a Promise resulting in a Response.
*/
setCatchHandler(handler) {
this._catchHandler = normalizeHandler(handler);
}
/**
* Registers a route with the router.
*
* @param {module:workbox-routing.Route} route The route to register.
*/
registerRoute(route) {
{
assert_js.assert.isType(route, 'object', {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'registerRoute',
paramName: 'route'
});
assert_js.assert.hasMethod(route, 'match', {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'registerRoute',
paramName: 'route'
});
assert_js.assert.isType(route.handler, 'object', {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'registerRoute',
paramName: 'route'
});
assert_js.assert.hasMethod(route.handler, 'handle', {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'registerRoute',
paramName: 'route.handler'
});
assert_js.assert.isType(route.method, 'string', {
moduleName: 'workbox-routing',
className: 'Router',
funcName: 'registerRoute',
paramName: 'route.method'
});
}
if (!this._routes.has(route.method)) {
this._routes.set(route.method, []);
} // Give precedence to all of the earlier routes by adding this additional
// route to the end of the array.
this._routes.get(route.method).push(route);
}
/**
* Unregisters a route with the router.
*
* @param {module:workbox-routing.Route} route The route to unregister.
*/
unregisterRoute(route) {
if (!this._routes.has(route.method)) {
throw new WorkboxError_js.WorkboxError('unregister-route-but-not-found-with-method', {
method: route.method
});
}
const routeIndex = this._routes.get(route.method).indexOf(route);
if (routeIndex > -1) {
this._routes.get(route.method).splice(routeIndex, 1);
} else {
throw new WorkboxError_js.WorkboxError('unregister-route-route-not-registered');
}
}
}
/*
Copyright 2019 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.
*/
let defaultRouter;
/**
* Creates a new, singleton Router instance if one does not exist. If one
* does already exist, that instance is returned.
*
* @private
* @return {Router}
*/
const getOrCreateDefaultRouter = () => {
if (!defaultRouter) {
defaultRouter = new Router(); // The helpers that use the default Router assume these listeners exist.
defaultRouter.addFetchListener();
defaultRouter.addCacheListener();
}
return defaultRouter;
};
/*
Copyright 2019 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.
*/
/**
* Easily register a RegExp, string, or function with a caching
* strategy to a singleton Router instance.
*
* This method will generate a Route for you if needed and
* call [registerRoute()]{@link module:workbox-routing.Router#registerRoute}.
*
* @param {RegExp|string|module:workbox-routing.Route~matchCallback|module:workbox-routing.Route} capture
* If the capture param is a `Route`, all other arguments will be ignored.
* @param {module:workbox-routing~handlerCallback} [handler] A callback
* function that returns a Promise resulting in a Response. This parameter
* is required if `capture` is not a `Route` object.
* @param {string} [method='GET'] The HTTP method to match the Route
* against.
* @return {module:workbox-routing.Route} The generated `Route`(Useful for
* unregistering).
*
* @memberof module:workbox-routing
*/
function registerRoute(capture, handler, method) {
let route;
if (typeof capture === 'string') {
const captureUrl = new URL(capture, location.href);
{
if (!(capture.startsWith('/') || capture.startsWith('http'))) {
throw new WorkboxError_js.WorkboxError('invalid-string', {
moduleName: 'workbox-routing',
funcName: 'registerRoute',
paramName: 'capture'
});
} // We want to check if Express-style wildcards are in the pathname only.
// TODO: Remove this log message in v4.
const valueToCheck = capture.startsWith('http') ? captureUrl.pathname : capture; // See https://github.com/pillarjs/path-to-regexp#parameters
const wildcards = '[*:?+]';
if (new RegExp(`${wildcards}`).exec(valueToCheck)) {
logger_js.logger.debug(`The '$capture' parameter contains an Express-style wildcard ` + `character (${wildcards}). Strings are now always interpreted as ` + `exact matches; use a RegExp for partial or wildcard matches.`);
}
}
const matchCallback = ({
url
}) => {
{
if (url.pathname === captureUrl.pathname && url.origin !== captureUrl.origin) {
logger_js.logger.debug(`${capture} only partially matches the cross-origin URL ` + `${url}. This route will only handle cross-origin requests ` + `if they match the entire URL.`);
}
}
return url.href === captureUrl.href;
}; // If `capture` is a string then `handler` and `method` must be present.
route = new Route(matchCallback, handler, method);
} else if (capture instanceof RegExp) {
// If `capture` is a `RegExp` then `handler` and `method` must be present.
route = new RegExpRoute(capture, handler, method);
} else if (typeof capture === 'function') {
// If `capture` is a function then `handler` and `method` must be present.
route = new Route(capture, handler, method);
} else if (capture instanceof Route) {
route = capture;
} else {
throw new WorkboxError_js.WorkboxError('unsupported-route-type', {
moduleName: 'workbox-routing',
funcName: 'registerRoute',
paramName: 'capture'
});
}
const defaultRouter = getOrCreateDefaultRouter();
defaultRouter.registerRoute(route);
return route;
}
/*
Copyright 2019 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.
*/
/**
* If a Route throws an error while handling a request, this `handler`
* will be called and given a chance to provide a response.
*
* @param {module:workbox-routing~handlerCallback} handler A callback
* function that returns a Promise resulting in a Response.
*
* @memberof module:workbox-routing
*/
function setCatchHandler(handler) {
const defaultRouter = getOrCreateDefaultRouter();
defaultRouter.setCatchHandler(handler);
}
/*
Copyright 2019 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.
*/
/**
* Define a default `handler` that's called when no routes explicitly
* match the incoming request.
*
* Without a default handler, unmatched requests will go against the
* network as if there were no service worker present.
*
* @param {module:workbox-routing~handlerCallback} handler A callback
* function that returns a Promise resulting in a Response.
*
* @memberof module:workbox-routing
*/
function setDefaultHandler(handler) {
const defaultRouter = getOrCreateDefaultRouter();
defaultRouter.setDefaultHandler(handler);
}
exports.NavigationRoute = NavigationRoute;
exports.RegExpRoute = RegExpRoute;
exports.Route = Route;
exports.Router = Router;
exports.registerRoute = registerRoute;
exports.setCatchHandler = setCatchHandler;
exports.setDefaultHandler = setDefaultHandler;
return exports;
}({}, workbox.core._private, workbox.core._private, workbox.core._private, workbox.core._private));
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