Since Angular v8, and commit b3dda0e, `parseUrl()` can be called without
`relativeTo`, thus `new URL()` can be called with `relativeTo = undefined`.
Safari does not like it and the service worker registration fails:
```js
new URL('https://angular.io/') // OK
new URL('https://angular.io/', undefined) // TypeError
```
Closes#31061
PR Close#31140
Previously, it was not possible to have multiple apps (using
`@angular/service-worker`) on different subpaths of the same domain,
because each SW would overwrite the caches of the others (even though
their scope was different).
This commit fixes it by ensuring that the cache names created by the SW
are different for each scope.
Fixes#21388
PR Close#27080
This commit fixes several issues discovered through use in real apps.
* The sha1() function operated on text content, causing issues for binary-format files.
A sha1Binary() function which operates on unparsed data now avoids any encoding issues.
* The characters '?' and '+' were not escaped in Glob-to-regex conversion previously, but
are now.
* URLs from the browser contain the full origin, but were checked against the table of
hashes from the manifest which only has the path for URLs from the same origin. Now the
origin is checked and URLs are relativized to the domain root before comparison if
appropriate.
* ngsw: prefix was missing from data groups, is now added.
* Occasionally servers will return a redirected response for an asset, and caching it could
cause errors for navigation requests. The SW now handles this by detecting such responses
and following the redirect manually, to avoid caching a redirected response.
* The request for known assets is now created from scratch from the URL before fetching from
the network, in order to sanitize it and avoid carrying any special modes or headers that
might result in opaque responses.
* Debugging log for troubleshooting.
* Avoid creating errors by returning 504 responses on error.
* Fix bug where idle queue doesn't run in some circumstances.
* Add tests for the above.
This service worker is a conceptual derivative of the existing @angular/service-worker maintained at github.com/angular/mobile-toolkit, but has been rewritten to support use across a much wider variety of applications.
Entrypoints include:
@angular/service-worker: a library for use within Angular client apps to communicate with the service worker.
@angular/service-worker/gen: a library for generating ngsw.json files from glob-based SW config files.
@angular/service-worker/ngsw-worker.js: the bundled service worker script itself.
@angular/service-worker/ngsw-cli.js: a CLI tool for generating ngsw.json files from glob-based SW config files.
Joey Perrott
Hoel IRIS
Peter Johan Salomonsen
George Kalpakas
Sheik Althaf
Alex Rickabaugh