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From "jakub-g (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CB-12035) [cordova-plugin-network-information] connection info is not reliable on Android 6
Date Sat, 10 Dec 2016 22:17:58 GMT

     [ https://issues.apache.org/jira/browse/CB-12035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

jakub-g updated CB-12035:
-------------------------
    Affects Version/s: 1.3.0

> [cordova-plugin-network-information] connection info is not reliable on Android 6
> ---------------------------------------------------------------------------------
>
>                 Key: CB-12035
>                 URL: https://issues.apache.org/jira/browse/CB-12035
>             Project: Apache Cordova
>          Issue Type: Bug
>          Components: Plugin Network Information
>    Affects Versions: 1.3.0
>         Environment: Samsung Galaxy Edge S6 / Android 6
> useragent: "Mozilla/5.0 (Linux; Android 6.0.1; SM-G925F Build/MMB29K; wv) AppleWebKit/537.36
(KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.124 Mobile Safari/537.36"
> reproduced with:
> cordova-plugin-network-information@1.3.0 (latest)
> cordova-plugin-network-information@1.2.0
>            Reporter: jakub-g
>              Labels: android
>
> I've noticed that information exposed by the plugin is not reliable. It happens often
that I'm connected to the internet via WiFi, and the plugin says that there's no connection.
> It's not easy to reproduce it on-demand, but I reproduced it many times recently. It
happens most often when in the morning, I open the Cordova app that was running in background
throughout the night.
> Then, when I connect to Chrome Dev Tools, I can do a repl session like this:
> {code}
> > navigator.connection.type
> "none"
> > window.fetch('http://www.example.org').then(function(res) {console.log(res.status)})
> Promise {[[PromiseStatus]]: "pending", [[PromiseValue]]: undefined}
> 200
> Fetch complete: GET "http://www.example.org/".(anonymous function)
> > navigator.connection.type
> "none"
> {code}
> So, the plugin thinks I'm offline, yet any HTTP calls done within the app without checking
if I'm offline or online, are successful (either from the app or devtools).
> When I disable WiFi and reenable it, after a few seconds the plugin updates its state
and then it tells that connection type is "wifi".
> There are several possibilities here:
> - either system (or device driver) gives us incorrect information, or
> - cordova plugin is caching data and/or not listening properly to all the events and/or
incorrectly processing it
> and most probably the issue manifests itself when the device is asleep for many hours
(but I'm not sure about this).
> Note that I also noticed another issue, that sometimes the Chrome network stack thinks
I'm offline (when I do an HTTP call, it fails immediately and I see network errors in devtools
console) - and then I restart the Cordova app, and everything's fine, all HTTP calls are ok
- but this is unrelated to this ticket, and perhaps a bug in Chrome.
> This ticket seems to be most likely a bug in the plugin, because as I said before, doing
HTTP call succeeds despite the plugin telling me that I'm offline.



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