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https://issues.apache.org/jira/browse/CB-6015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13898730#comment-13898730
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Ian Clelland commented on CB-6015:
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What version of file-transfer are you using with this? I think you may need to
upgrade to the latest file-transfer, if this isn't working for you.
>From the stacktrace, it appears that you are trying to use the {{fullPath}}
>property of the FileEntry object as the location to save to.
{{FileEntry.fullPath}} _used_ to be a device-filesystem path from the root of
your Android filesystem to the actual file location (something like
{{/data/data/app-name/avatar.jpeg}} or
{{/storage/emulated/0/sdcard/avatar.jpeg}},) but now, conforming to the actual
spec, is the path _relative to the root of the filesystem_, so just
{{/avatar.jpeg}}.
What would happen now in that case is that "{{/avatar.jpeg}}" looks like a path
to a file in the root directory, which definitely is read-only. File-transfer
complains because it can't write to the root.
What you can do in that case is use the FileEntry's {{toURL()}} method to get
an actual url like {{cdvfile://localhost/persistent/avatar.jpeg}} that you can
pass to the new version of file-transfer.download. (It should even work with
the old version of file, since {{toURL()}} used to just return the fullPath
property).
> FileTransfer error: Read-Only filesystem
> ----------------------------------------
>
> Key: CB-6015
> URL: https://issues.apache.org/jira/browse/CB-6015
> Project: Apache Cordova
> Issue Type: Bug
> Components: Android, Plugin File, Plugin File Transfer
> Affects Versions: 3.3.0
> Reporter: Darryl Pogue
>
> Using the FileTransfer plugin to write to a FileEntry returned from the File
> plugin results in an error.
> {code}
> D/FileTransfer(12423): download http://example.com/image.jpeg to //avatar.jpeg
> E/FileTransfer(12423):
> {"target":"\/\/avatar.jpeg","source":"http:\/\/example.com\/image.jpeg","http_status":0,"code":1}
> E/FileTransfer(12423): java.io.FileNotFoundException: /avatar.jpeg: open
> failed: EROFS (Read-only file system)
> E/FileTransfer(12423): at libcore.io.IoBridge.open(IoBridge.java:409)
> E/FileTransfer(12423): at
> java.io.FileOutputStream.<init>(FileOutputStream.java:88)
> E/FileTransfer(12423): at
> org.apache.cordova.CordovaResourceApi.openOutputStream(CordovaResourceApi.java:293)
> E/FileTransfer(12423): at
> org.apache.cordova.CordovaResourceApi.openOutputStream(CordovaResourceApi.java:274)
> E/FileTransfer(12423): at
> org.apache.cordova.filetransfer.FileTransfer$4.run(FileTransfer.java:708)
> E/FileTransfer(12423): at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
> E/FileTransfer(12423): at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
> E/FileTransfer(12423): at java.lang.Thread.run(Thread.java:841)
> E/FileTransfer(12423): Caused by: libcore.io.ErrnoException: open failed:
> EROFS (Read-only file system)
> E/FileTransfer(12423): at libcore.io.Posix.open(Native Method)
> E/FileTransfer(12423): at
> libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
> E/FileTransfer(12423): at libcore.io.IoBridge.open(IoBridge.java:393)
> E/FileTransfer(12423): ... 7 more
> {code}
> This worked correctly before upgrading the file plugin.
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