This code snippet is from the service worker selective caching sample. Returns a Promise that resolves to an array of Cache keys. If no Cache entry is found, the promise resolves to false. lete(request, options)įinds the Cache entry whose key is the request, returning a Promise that resolves to true if a matching Cache entry is found and deleted. Takes both a request and its response and adds it to the given cache. Takes an array of URLs, retrieves them, and adds the resulting response objects to the given cache. This is functionally equivalent to calling fetch(), then using put() to add the results to the cache. Takes a URL, retrieves it and adds the resulting response object to the given cache. Returns a Promise that resolves to an array of all matching responses in the Cache object. Returns a Promise that resolves to the response associated with the first matching request in the Cache object. See Deleting old caches for more information. Make sure to version caches by name and use the caches only from the version of the script that they can safely operate on. The browser will generally delete all of the data for an origin or none of the data for an origin. ![]() The browser does its best to manage disk space, but it may delete the Cache storage for an origin. Cache quota usage estimates are available via the StorageManager.estimate() method. Each browser has a hard limit on the amount of cache storage that a given origin can use. You are also responsible for periodically purging cache entries. Use CacheStorage.open() to open a specific named Cache object and then call any of the Cache methods to maintain the Cache. ![]() Items in a Cache do not get updated unless explicitly requested they don't expire unless deleted. in a ServiceWorker) handles Cache updates. You are responsible for implementing how your script (e.g. You don't have to use it in conjunction with service workers, even though it is defined in the service worker spec.Īn origin can have multiple, named Cache objects. Note that the Cache interface is exposed to windowed scopes as well as workers. How long a Cache object lives is browser dependent, but a single origin's scripts can typically rely on the presence of a previously populated Cache object. For Google Chrome it’s the ChromeCacheView.The Cache interface provides a persistent storage mechanism for Request / Response object pairs that are cached in long lived memory. ![]() One of the best options is to use one of the web browser tools by Nirsoft. You can either click on every file to open it or decode the cached files using special software or a browser extension. Most of the names are random and there’s no way to tell the format of the file or where it came from. The difficulty here is that you won’t know exactly what you’re looking at. Inside the Cache folder you’ll find files with various extensions and random file names. Simply search for your browser’s name after following the \AppData\Local path, like \AppData\Local\Mozilla\Firefox\, or \AppData\Local\Microsoft\Edge\. Then copy and paste the following into the command line: \AppData\Local\Google\Chrome\User Data\Default\Cache.īecause all internet browsers are installed on system C drive by default, you can easily see cached pages and files from any browser by following a similar path. You can also find Chrome’s cache folder using the Run command.Īccess the Run command through the Start menu or using the shortcut Windows key + R. For example, for Google Chrome it looks like this: C:\Users\USERNAME\AppData\Local\Google\Chrome\User Data\Default\Cache. On Windows, the path to locate the browser cache is a little different. ![]() For Safari’s cache, use a different shortcut: /Users/USERNAME/Library/Containers//Data/Library/Caches/.
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