Re: Display raw image - given byte[]?

As long as the template doesn't write anything else on its own into  
the response writer ('cause it'll use the writer, not output stream),  
I think it would work. I can hardly recommend you do this though - it  
seems highly abusive; you're reaching from a higher level of  
abstraction (view-generating template) to a lower level of abstraction  
(servlet API). If I were you, I'd have a separate Java servlet that  
returns the images, and direct image requests to its URL.

Attila.

--
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On 2009.10.14., at 2:10, Mathew Rowley wrote:

> I came across this tutorial:
>
> http://www.conandalton.net/2008/10/sending-binary-data-from-freemarker.html
>
> It uses freemarker to call a method that writes to the default  
> stream.  Is there any security ramification to have the template  
> being able to access the HttpServletRespones object? Are there any  
> other issues with doing as the tutorial describes?  Thanks.
>
> MAT
>
>
> On 10/13/09 2:44 PM, "Daniel Dekany" <[email protected]> wrote:
>
>> Tuesday, October 13, 2009, 9:29:47 PM, Mathew Rowley wrote:
>>
>> > I have an interface that returns an image in the form ‘byte[]’.  Is
>> > it possible to create a ftl that “writes” that image out to the  
>> user
>> > – setting the header to image/png, etc?  Thanks.
>>
>> Nope... FreeMarker has no control over the MIME-type or over the
>> output charset (which should be ISO-8859-1 if you want to keep the
>> bits); the embedding framework has. Even then, it would be quite
>> inefficient due to FreeMarker uses 16 bit char-s (UNICODE)  
>> internally.
>> Last not least, it would be a miss-use of FreeMarker.
>>
>> > MAT
>> --
>> Best regards,
>>  Daniel Dekany

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