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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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tree10027f336435511475e392454359edea8e25895d /testing/web-platform/tests/service-workers/stub-5.2-cross-origin-resources.html
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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+<!DOCTYPE html>
+<html>
+<title>Service Workers: Cross-Origin Resources &amp; CORS</title>
+ <head>
+ <link rel="help" href="https://w3c.github.io/ServiceWorker/#cross-origin-resources">
+ <script src="/resources/testharness.js"></script>
+ <script src="/resources/testharnessreport.js"></script>
+
+ </head>
+ <body>
+
+<!--
+
+Applications tend to cache items that come from a CDN or other domain. It is
+possible to request many of them directly using <script>, <img>, <video> and
+<link> elements. It would be hugely limiting if this sort of runtime
+collaboration broke when offline. Similarly, it is possible to XHR many sorts
+of off-domain resources when appropriate CORS headers are set.
+
+ServiceWorkers enable this by allowing `Cache`s to fetch and cache off-origin
+items. Some restrictions apply, however. First, unlike same-origin resources
+which are managed in the `Cache` as `[Promise][1]`s for `Response` instances,
+the objects stored are `[Promise][1]`s for `OpaqueResponse` instances.
+`OpaqueResponse` provides a much less expressive API than `Response`; the
+bodies and headers cannot be read or set, nor many of the other aspects of
+their content inspected. They can be passed to `respondWith()` and
+`forwardTo()` in the same manner as `Response`s, but cannot be meaningfully
+created programmatically. These limitations are necessary to preserve the
+security invariants of the platform. Allowing `Cache`s to store them allows
+applications to avoid re-architecting in most cases.
+
+
+
+[1]: http://goo.gl/3TobQS
+
+-->
+
+
+
+ <script>
+ test(function() {
+ // not_implemented();
+ }, "There are no tests for section Cross-Origin Resources &amp; CORS so far.");
+ </script>
+
+ </body>
+</html>
+