Hi! A couple of questions:
What was the DOMException.name before this change?
Do we know what do other browsers do in this situation? Or is LevelDB
only used by Chromium?
On 9/17/24 10:11 AM, Chromestatus wrote:
Contact emails
abhishek.shanthku...@microsoft.com, est...@chromium.org
Specification
https://www.w3.org/TR/IndexedDB/#dom-idbrequest-error
Summary
Change to reporting for certain error cases that were previously
reported with a DOMException and the message "Failed to read large
IndexedDB value". Chromium will now raise a DOMException with the name
"NotFoundError" when the file containing the data being read by an
IDBRequest is missing from the disk so that sites can take the
appropriate corrective action when an unrecoverable failure occurs.
Corrective actions could include deleting the entry from the DB,
notifying the user, re-fetching the data from servers, etc. More
details: a large value (above a specific size threshold) written to
IndexedDB is not stored directly in the underlying LevelDB database
but instead stored as a separate file. An IndexedDB read request for
this value looks up the blob reference from LevelDB, reads the blob,
then unwraps and returns the stored value. If a failure occurs in this
process, the browser fires an "error" event and sets the error
property on the IDBRequest to a DOMException with the message "Failed
to read large IndexedDB value". The failure could be recoverable
(caused by low memory) or unrecoverable (the blob file is missing from
the disk). This feature updates the name to "NotFoundError" to enable
distinguishing recoverable and unrecoverable cases.
Blink component
Blink>Storage>IndexedDB
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink>Storage>IndexedDB>
TAG review
None
TAG review status
Not applicable
Risks
Interoperability and Compatibility
None
/Gecko/: No signal
/WebKit/: No signal
/Web developers/: No signals
/Other signals/:
WebView application risks
Does this intent deprecate or change behavior of existing APIs, such
that it has potentially high risk for Android WebView-based applications?
None
Debuggability
None
Will this feature be supported on all six Blink platforms
(Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?
Yes
This change is in the blink layer of the IndexedDB API implementation
and hence applies to all Blink platforms.
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
No
Flag name on chrome://flags
None
Finch feature name
None
Non-finch justification
This is a simple change to the error type when a failure occurs due to
a specific cause. Web developers can choose to update their sites to
respond differently to this specific error, but existing general error
handling keyed to the "Failed to read large IndexedDB value" message
will continue to work. Hence, this is unlikely to break sites and is
therefore not behind a feature flag.
Requires code in //chrome?
False
Tracking bug
https://issues.chromium.org/issues/362123231
Estimated milestones
Shipping on desktop 130
Shipping on Android 130
Shipping on WebView 130
Anticipated spec changes
Open questions about a feature may be a source of future web compat or
interop issues. Please list open issues (e.g. links to known github
issues in the project for the feature specification) whose resolution
may introduce web compat/interop risk (e.g., changing to naming or
structure of the API in a non-backward-compatible way).
None
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5140210640486400?gate=5120313600507904
This intent message was generated by Chrome Platform Status
<https://chromestatus.com>.
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