[web-devel] safety of Data.Ascii.unsafeFromString

[Michael Snoyman]

I would say to use the Data.Text.Encoding functions to convert to a
ByteString. If you want to be very careful, you should validate the
Text value to ensure there are no non-ASCII values first, but in
practice this probably should be an issue.

On Thu, Jun 9, 2011 at 2:10 PM, Max Cantor <mxcantor at gmail.com> wrote:
> so, if i want to take the FileContentType from FileInfo, which is from fileField in forms, which is a Data.Text and convert that to a contentType to use in sendFile (which takes a ContentType which is a Data.ByteString), what is the preferred way to do that?
>
> max
>
> On Jun 9, 2011, at 7:07 PM, Michael Snoyman wrote:
>
>> You don't even get a runtime exception: your results are silently
>> broken. It's no worse than Data.ByteString.Char8.pack.
>>
>> But the ascii package isn't really being used going forward, people
>> didn't like the extra noise it added to their code.
>>
>> Michael
>>
>> On Thu, Jun 9, 2011 at 2:04 PM, Max Cantor <mxcantor at gmail.com> wrote:
>>> just how unsafe are the unsafeXXX functions in Data.Ascii?  IS it just that you might get a runtime exception or could they do some more serious damage somehow?
>>>
>>> max
>>>
>>>
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>
>