[Seaside] How-to upload and view image ?

[Andreas Nilsson]

It is simply a string with the file contents.
I think Squeak has support for GIF pictures so you could probably get 
width and height that way but I haven't tried it myself.
If you look at the class WAFile I think you'll find that you can get 
the content type that way.
File-uploading using HTML forms just plain sucks, but that's not 
Seaside's or Squeaks fault.
You might want to consider setting up an FTP server instead, depending 
on your needs.

/Adde

On 2004-09-19, at 00.21, Hilaire Fernandes wrote:

> Thanks a lot for the tips!
>
> To which Squeak objet match the content in the WAFile? The inspector
> says it is a string. Is there any possibility to convert it to another
> format to retrieve information concerning the picture.
>
> I have to admit that I am a bit disapointed regarding the over 
> complicated
> procedure to just upload a simple picture. Not to say that Mime type
> and width and height still  need to be calculated from somewhere.
>
> Regards,
>
> Hilaire
>
> On Sat, 11 Sep 2004 14:49:53 +0200
> Andreas Nilsson <wahboh at mac.com> wrote:
>
>> I just went through this so I'll try to explain what I did to get it
>> working:
>>
>> First the upload form:
>> html attributeAt: 'enctype' put: 'multipart/form-data'.
>> html form: [	
>> 	html fileUploadWithCallback: [:file | picture := file contents ].
>> 	html submitButton.
>> ].
>> You get a WAFile in the block parameter so you can look in that class
>> for ideas, among other things it contains the content type.
>>
>> Then to display the picture you have to wrap it in a class that
>> responds to #height, #width, #asMIMEDocument and returns unique values
>> in #= and #hash for different pictures (otherwise the images will be
>> cached, ie. they will not change when you change the contents of your
>> wrapper instance). #height and #width are just used for displaying so
>> they don't have to match the pictures properties, but it will strech /
>> shrink if they don't.
>> I implemented asMIMEDocument in the following way in my wrapper class
>> (APicture):
>>
>> #asMimeDocument
>> 	^ MIMEDocument contentType: 'image/jpeg' content: contents.
>>
>> Where contents is the contents from the form above that I passed to 
>> the
>> wrapper instance when I created it.
>>
>> Then to display it you just pass an instance of your wrapper class
>> (APicture) to html's #imageWithForm method:
>>
>> html imageWithForm: picture
>>
>> Hope that helps!
>>
>> /Adde
>>
>> On 2004-09-11, at 14.28, Hilaire Fernandes wrote:
>>
>>> Hello,
>>>
>>> I am a total newbie both to Seaside and Squeak (and more generaly to
>>> Smalltalk).
>>>
>>> I try to figure out how an user can upload an image into Seaside, 
>>> then
>>> how to use it in web page rendering.
>>>
>>> A code example to understand that will be more than enought.
>>>
>>> I saw the WAUploadTest class but I miss the second part where you 
>>> want
>>> to use
>>> the uploaded image to render the image in a web document.
>>>
>>> Thanks
>>>
>>> Hilaire
>>> _______________________________________________
>>> Seaside mailing list
>>> Seaside at lists.squeakfoundation.org
>>> http://lists.squeakfoundation.org/listinfo/seaside
>>
>> _______________________________________________
>> Seaside mailing list
>> Seaside at lists.squeakfoundation.org
>> http://lists.squeakfoundation.org/listinfo/seaside
>>
> _______________________________________________
> Seaside mailing list
> Seaside at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/listinfo/seaside