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https://issues.apache.org/jira/browse/CB-12257?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Stanford resolved CB-12257.
-----------------------------------
Resolution: Not A Problem
Used the FileTransfer plugin instead.
> xhr.send fails on Cordova File object - maybe because it's not an instanceof
> Blob?
> ----------------------------------------------------------------------------------
>
> Key: CB-12257
> URL: https://issues.apache.org/jira/browse/CB-12257
> Project: Apache Cordova
> Issue Type: Bug
> Components: Plugin File
> Affects Versions: 4.3.1
> Environment: Cordova iOS, Android.
> Reporter: Michael Stanford
>
> Versions:
> Cordova: 6.4.0
> Cordova File System Plugin: 4.3.1
> iOS: 10.0.2
> Cordova iOS: 4.3.1
> Android: 6.0.1
> Cordova Android: 6.0.0
> Desktop OS: OS X 10.12.1
> Desktop Safari: 10.0.1
> AWS S3 SDK is documented at:
> http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3/ManagedUpload.html
> On both Android and iOS, using the Cordova File System plugin, and in OS X
> Safari using the File Input HTML tag, my test app successfully retrieves a
> File object in every case from the local file system.
> In each of the three cases, the app invokes the Amazon S3 Javascript API
> upload method with this File object. In desktop Safari the file uploads
> correctly and appears in the S3 bucket correctly.
> In the Cordova apps, both iOS and Android, the file seems to upload correctly
> (no errors), but the resulting (correctly named) file in the bucket contains
> only the 15-byte text string "\[object Object\]".
> The app uses the same HTML and JS source files in all three cases; after
> creating the File object the code is identical, and because they run from the
> same HTML page, the meta information is also the same.
> Because the S3 API upload method supports multipart uploads, it invokes the
> File.slice method on the File before passing it to xhr.send. In the desktop
> Safari implementation of the File object, the slice method returns a Blob
> object. In the Cordova implementation (as documented in the source code at
> line 47 of File.js) it returns another File object.
> Tracing through to the xhr.send function in the S3 API, the desktop version
> delivers a Blob as the argument to xhr.send(), and the file is uploaded
> correctly. The Cordova versions deliver a File as the argument to xhr.send(),
> and the uploads fail.
> Although the File object in desktop Safari is an instanceof Blob, the Cordova
> File object is not an instanceof Blob, which might explain why xhr.send can't
> cope with it.
> {code}
> > params.Body instanceof File
> < true
> > params.Body instanceof Blob
> < true
> {code}
> {code}
> > params.Body instanceof File
> < true
> > params.Body instanceof Blob
> < false
> {code}
> The documentation here
> (https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/send)
> indicates that xhr.send can handle a Blob, but doesn't mention a File.
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