Whenever an HTTP request sequence is started, i.e. wait for the fetch
start time, issue a network request, and return the result, abort the
process if the results are known to no longer be needed. This occurs
when a user has dwelt upon one link and then abandoned it either during
the fetch start wait time or during the fetch network request itself.
This change is accomplished by preserving the pending promises in two
actions, LINK_DWELL and FETCH_START, and whenever the ABANDON_START
action is issued, it now aborts any previously pending XHR-like promise,
called a "AbortPromise" which is just a thenable with an abort() method.
There is a similar concept in Core:
ecc812f06e/resources/src/mediawiki.api/index.js.
Aborting pending requests has big implications for client and server
logging as requests are quickly canceled, especially on slower
connections. These differences can be observed on the network tab of
DevTools and the log in Redux DevTools.
Consider, for instance, the scenario of dwelling upon and quickly
abandoning a single link prior to this patch:
BOOT EVENT_LOGGED LINK_DWELL FETCH_START ABANDON_START FETCH_END STATSV_LOGGED ABANDON_END EVENT_LOGGED FETCH_COMPLETE
And after this patch when the fetch timer is canceled (prior to an
actual network request):
BOOT EVENT_LOGGED LINK_DWELL ABANDON_START ABANDON_END EVENT_LOGGED
In the above sequence, FETCH_* and STATSV_LOGGED actions never occur.
And after this patch when the network request itself is canceled:
BOOT EVENT_LOGGED LINK_DWELL FETCH_START ABANDON_START FETCH_FAILED STATSV_LOGGED FETCH_COMPLETE ABANDON_END EVENT_LOGGED
FETCH_FAILED occurs intentionally, STATSV_LOGGED and FETCH_COMPLETE
still happen even though the fetch didn't complete successfully, and
FETCH_END doesn't.
Additionally, since less data is transmitted, it's possible that the
timing and success rate of logging will improve on low bandwidth
connections.
Also, this patch tries to revise the JSDocs where possible to support
type checking and fix a call to the missing assert.fail() function in
changeListener.test.js.
Bug: T197700
Change-Id: I9a73b3086fc8fb0edd897a347b5497d5362e20ef
Via jscodeshift:
jscodeshift \
-t jscodeshift-recipes/src/qunit-assert-equal-to-strictEqual.js \
Popups/tests
Also, some very minor manual clean up.
https://github.com/niedzielski/jscodeshift-recipes/blob/5944e50/src/qunit-assert-equal-to-strictEqual.js
Additional change:
* Drop redundant clipPath parameter from createThumbnailElement - this
parameter does not exist in the function signature.
Change-Id: I209ecf2d54b6f5c17767aa2041d8f11cb368a9b5
Functional changes
- Show the default / error preview for all extract request failures
except those due to network circumstances (such as CORS) or no
connectivity (offline). Previously, the error preview was displayed
only for missing pages.
- FETCH_COMPLETE was previously only dispatched after FETCH_END. Now
it's also dispatched after FETCH_FAILED. The additional "fetch
complete" is not expected to impact logging. The states of success
are: START, END, COMPLETE. The new failure states are consistent with
success: START, FAILED, COMPLETE.
Testing
Errors may be stimulated in a number of ways including:
- Timeout: add a timeout field to RESTBaseGateway /
MediaWikiGateway.fetch().
http://api.jquery.com/jquery.ajax/
- Bad request: change MediaWikiGateway.fetch's action field to
`Math.random() > 0.5 ? 'query' : 'fail'` and RESTBaseGateway.fetch's
url field to
`RESTBASE_ENDPOINT + ( Math.random() > 0.5 ? encodeURIComponent( title ) : '%%%' )`.
- Desired Gateway can be configured in Gateway#createGateway().
- Note: T184534 describes a circumstance where cached previews may not
appear when offline. Disable browser caching to avoid confusion.
Bug: T183151
Bug: T184534
Change-Id: I7332284da0e0fb1ecd234a6f1e146ebd9ad8d81f
Why: Because they are the approved standard by TC39 and Ecma for
JavaScript modules.
Changes:
* Wrap mw-node-qunit in run.js to register babel to transpile modules
for node v6
* Change all sources in src/ to use ES modules
* Change constants.js to be able to run without
jQuery.bracketedDevicePixelRatio given ES modules are hoisted to
the top by spec so we can't patch globals before importing it
* Change all tests in tests/node-qunit/ to use ES modules
* Drop usage of mock-require given ES modules are easy to stub with
sinon
Additional changes:
* Rename tests/node-qunit/renderer.js to renderer.test.js to follow
the convention of all the other files
* Make npm run test:node run only .test.js test files so that it
doesn't run the stubs.js or run.js file.
Bug: T171951
Change-Id: I17a0b76041d5e2fd18e2d54950d9d7c0db99a941
The setup and teardown hooks on QUnit.module are deprecated on the
latest versions.
See https://api.qunitjs.com/QUnit/module
mw-node-qunit supports them but we shouldn't be using them.
Bug: T160406
Change-Id: I32c07f22d01d16449a6e37f46ff20c577a1f14c6
If the user dwells on a link for long enough, then the gateway makes a
request, which is allowed to complete regardless of whether or not the
response is required.
If the user abandons the link but the request completes before the
abandon completes - currently, ABANDON_END_DELAY is 300 ms - then the
preview will be rendered temporarily.
Fix this by not rendering the preview if the user has started to abandon
the link.
Bug: T163350
Change-Id: I154dde4e3ccaed3d11cb023c85c44451fc0ad957
... instead of using the active element.
In the case of the eventLogging reducer, this fixes scenario 4.1 from
T159490#3150331, which was caused by late FETCH_COMPLETE actions being
reduced regardless of whether interaction had been finalised or a new
interaction had started.
Bug: T159490
Change-Id: If9d718625b0302ea2f75a778005643b4eef62bde
Ideally, the preview model is resolved after 500 ms, regardless of
whether the internal gateway takes 100 or 300 ms. Given this, there's an
important distinction to be made between the "fetch" ending and it
completing and their associated actions.
Changes:
* Dispatch the FETCH_COMPLETE action when the preview model is resolved.
* Update the reducers accordingly.
Change-Id: I62c9cb0430284b76338ea80bd170cac5af4be9d0
