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From Becky Gibson <>
Subject Re: Slicing files on iOS and Android
Date Tue, 08 Jan 2013 01:16:33 GMT
The reason for encoding on iOS was to support international characters.  The response from
read as text is decoded in the iOS specific version of readAsText at
line 65.  I wouldn't suspect that the all of the mobilespec file tests would pass with the
encoding removed since there are tests to check for extended characters?


Sent from my iPad

On Jan 7, 2013, at 6:30 PM, Braden Shepherdson <> wrote:

> I've recently been implementing support for Blob.slice() for FileReader
> files (sort of). With real native File and Blob objects, they actually hold
> the binary data. Cordova File objects are just records passed to
> FileReaders. Regardless, the API for File.slice() is identical: it takes a
> start and optional end position, and returns a new File. Asking FileReader
> to fetch that new file will return just the specified segment of the file.
> Some examples are in order. Suppose the file we're reading contains the
> text:
> "All that is gold does not glitter, not all those who wander are lost."
> Then
> f.slice(4, 8) would result in "that"
> f.slice(9) would be "is gold does not glitter, not all those who wander are
> lost."
> f.slice(-5, -1) would be "lost"
> This is implemented on Android and iOS for both reading text and reading
> data URLs. It's straightforward to implement on other platforms, and I
> encourage maintainers of other platforms to add this.
> I'll be updating the docs tomorrow, including the following quirk on iOS.
> That quirk is that iOS encodes the response to readAsText using %-escapes,
> so that spaces become %20 and so on. This breaks a handful of spec tests
> including mine. It seems very puzzling, since a quick test with that
> encoding removed shows that all the specs are now passing. I didn't commit
> that, I just wanted to see if the bridge code would die horribly or
> something. This has been in the codebase as far back as Github's history
> goes (the name change to Cordova), so I was unable to discover the original
> reason for it.
> Shaz, Andrew, any idea what's going on here? Is this a relic of an old
> bridge that can be removed? I'm not sure whether this is a breaking change
> for iOS, since Android and presumably other platforms do not do this.
> Braden

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