[
https://issues.apache.org/jira/browse/CB-9810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Leonel Gayard updated CB-9810:
------------------------------
Description:
h2. The problem
When reading a file with {{resolveLocalFileSystemURL}} followed by
{{FileReader.readAsText}}, the latter fails, with the error message {{Uncaught
TypeError: Failed to execute 'readAsText' on 'FileReader': parameter 1 is not
of type 'Blob'.}}
cordova-plugin-file provides these functions, which match the W3C APIs for File
and File System:
[resolveLocalFileSystemURL|http://www.w3.org/TR/2011/WD-file-system-api-20110419/#widl-LocalFileSystem-resolveLocalFileSystemURL]
and [FileReader|http://www.w3.org/TR/FileAPI/#APIASynch].
h2. Possible causes ?
It seems the fileEntry object is created inside the Java code, as a JSONObject
(method
[Filesystem#makeEntryForURL|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/src/android/Filesystem.java#L61];
therefore it does not implement the Javascript interfaces File or Blob.
h2. Possible solution ?
Looking at the source of
[FileReader.js|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/www/FileReader.js#L130],
it seems the FileReader implemented by the plugin delegates to the FileReader
of the web view (at least, that's what the name of the variable suggests,
`realReader`.
Also, the function in file FileReader.js [seems to rely on the attribute
localURL|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/www/FileReader.js#L88]
of the file object, which is not part of the API.
I made a quick hack on my local installation, to remove the call to the "real"
FileReader, and use the one written in Java; this fixed the issue, and makes it
possible to use FileReader.
Tested on Android SDK 22, on an LG Nexus, Android 5.0.1.
h2. Example
The repo at https://github.com/leonelag/proto-file-plugin has an example of an
application trying to use the plugin to read and write files, and fails on
Android.
was:
h2. The problem
When reading a file with {{resolveLocalFileSystemURL}} followed by
{{FileReader.readAsText}}, the latter fails, with the error message {{Uncaught
TypeError: Failed to execute 'readAsText' on 'FileReader': parameter 1 is not
of type 'Blob'.}}
cordova-plugin-file provides these functions, which match the W3C APIs for File
and File System:
[resolveLocalFileSystemURL|http://www.w3.org/TR/2011/WD-file-system-api-20110419/#widl-LocalFileSystem-resolveLocalFileSystemURL]
and [FileReader|http://www.w3.org/TR/FileAPI/#APIASynch].
h2. Possible causes ?
It seems the fileEntry object is created inside the Java code, as a JSONObject
(method
[Filesystem#makeEntryForURL|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/src/android/Filesystem.java#L61];
therefore it does not implement the Javascript interfaces File or Blob.
h2. Possible solution ?
Looking at the source of
[FileReader.js|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/www/FileReader.js#L130],
it seems the FileReader implemented by the plugin delegates to the FileReader
of the web view (at least, that's what the name of the variable suggests,
`realReader`.
Also, the function in file FileReader.js [seems to rely on the attribute
localURL|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/www/FileReader.js#L88]
of the file object, which is not part of the API.
I made a quick hack on my local installation, to remove the call to the "real"
FileReader, and use the one written in Java; this fixed the issue, and makes it
possible to use FileReader.
Tested on Android SDK 22, on an LG Nexus, Android 5.0.1.
> Mismatch between results of resolveLocalFileSystemURL and FileReader, throws
> error.
> -----------------------------------------------------------------------------------
>
> Key: CB-9810
> URL: https://issues.apache.org/jira/browse/CB-9810
> Project: Apache Cordova
> Issue Type: Bug
> Components: Plugin File
> Affects Versions: 3.0.0
> Environment: Android SDK 22
> Tested on an LG Nexus, Android 5.0.1
> Reporter: Leonel Gayard
>
> h2. The problem
> When reading a file with {{resolveLocalFileSystemURL}} followed by
> {{FileReader.readAsText}}, the latter fails, with the error message
> {{Uncaught TypeError: Failed to execute 'readAsText' on 'FileReader':
> parameter 1 is not of type 'Blob'.}}
> cordova-plugin-file provides these functions, which match the W3C APIs for
> File and File System:
> [resolveLocalFileSystemURL|http://www.w3.org/TR/2011/WD-file-system-api-20110419/#widl-LocalFileSystem-resolveLocalFileSystemURL]
> and [FileReader|http://www.w3.org/TR/FileAPI/#APIASynch].
> h2. Possible causes ?
> It seems the fileEntry object is created inside the Java code, as a
> JSONObject (method
> [Filesystem#makeEntryForURL|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/src/android/Filesystem.java#L61];
> therefore it does not implement the Javascript interfaces File or Blob.
> h2. Possible solution ?
> Looking at the source of
> [FileReader.js|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/www/FileReader.js#L130],
> it seems the FileReader implemented by the plugin delegates to the
> FileReader of the web view (at least, that's what the name of the variable
> suggests, `realReader`.
> Also, the function in file FileReader.js [seems to rely on the attribute
> localURL|https://github.com/apache/cordova-plugin-file/blob/r3.0.0/www/FileReader.js#L88]
> of the file object, which is not part of the API.
> I made a quick hack on my local installation, to remove the call to the
> "real" FileReader, and use the one written in Java; this fixed the issue, and
> makes it possible to use FileReader.
> Tested on Android SDK 22, on an LG Nexus, Android 5.0.1.
> h2. Example
> The repo at https://github.com/leonelag/proto-file-plugin has an example of
> an application trying to use the plugin to read and write files, and fails on
> Android.
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