Vincent Scuorzo created CB-7253:
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Summary: window.requestFileSystem fails when no sd card is present
and non-zero value is provided for size
Key: CB-7253
URL: https://issues.apache.org/jira/browse/CB-7253
Project: Apache Cordova
Issue Type: Bug
Components: Plugin File
Affects Versions: 3.5.0
Environment: I discovered this issue on a Nexus7 emulator running
android 4.4.2 with no sd card.
Reporter: Vincent Scuorzo
Priority: Minor
The problem is that when no external storage is present the size parameter is
compared to the available storage space on the internal file system which is
incorrectly reported as 0. After reading a post on stack overflow
(http://stackoverflow.com/questions/4799643/getting-all-the-total-and-available-space-on-android)
I noticed that they were checking available space in a different way so I
tried it and the issue went away.
You can see this bug in action by setting up an emulator as I described and
running an app with the file plugin that can execute the following javascript:
window.requestFileSystem(PERSISTENT, 1024, function(fs){ console.log(fs); },
function(e){ console.log(e); });
With the current release you will get an error related to reaching the storage
quota since the available space is reported incorrectly. Change line 72 of
src/android/DirectoryManager.java to read the following:
freeSpace =
freeSpaceCalculation(Environment.getRootDirectory().getAbsolutePath());
Run the same line of javascript as before and you will now have success,
assuming you actually have the available space.
You can easily bypass this issue and access the filesystem by just passing 0
for the size but doing so will also circumvent the checks that ensure you don't
try to use more space than is available. In my case, my app was handicapping
itself because it thought it didn't have enough space to download additional
resources when it should not have had any issues.
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