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Problems getting a png image with ZnEasy

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Offray

Problems getting a png image with ZnEasy

Hi all,

When I try to do:

~~~
ZnEasy getPng:
'https://pbs.twimg.com/profile_images/3179579549/f83f0e935fb5eff6d967e37e1a3efe5c_normal.png'
~~~

I get "MessageNotUnderstood: receiver of "bitShift:" is nil". Still I
can browse the image in the web browser.

Any hints?

Cheers,

Offray

Sven Van Caekenberghe-2

Re: Problems getting a png image with ZnEasy

> On 16 May 2015, at 03:15, Offray Vladimir Luna Cárdenas <[hidden email]> wrote:
>
> Hi all,
>
> When I try to do:
>
> ~~~
> ZnEasy getPng: 'https://pbs.twimg.com/profile_images/3179579549/f83f0e935fb5eff6d967e37e1a3efe5c_normal.png'
> ~~~
>
> I get "MessageNotUnderstood: receiver of "bitShift:" is nil". Still I can browse the image in the web browser.
>
> Any hints?

I don't know, for some reason Pharo cannot read that particular PNG. Consider:

'https://pbs.twimg.com/profile_images/3179579549/f83f0e935fb5eff6d967e37e1a3efe5c_normal.png' asUrl saveContentsToFile: 'foo.png'.

$ open current/foo.png

ImageReadWriter formFromFileNamed: 'foo.png'

$ file current/foo.png
current/foo.png: PNG image data, 48 x 48, 8-bit/color RGBA, non-interlaced

> Cheers,
>
> Offray
>

Offray

Re: Problems getting a png image with ZnEasy

Hi Sven,

Thanks for your quick answer. It seems that the problem is related with
encoding errors on the images. I download them (with ZnClient #get), try
to preview them using "FileSystem disk" navigation facilities and get
the same error, but after converting and then with "convert" from Unix
command shell (event without changing the file extension) I was able to
preview them. I'm planning now to make some preprocessing of the image
to warranty it opens fine.

Cheers,

Offray

El 16/05/15 a las 13:27, Sven Van Caekenberghe escribió:

>
>> On 16 May 2015, at 03:15, Offray Vladimir Luna Cárdenas <[hidden email]> wrote:
>>
>> Hi all,
>>
>> When I try to do:
>>
>> ~~~
>> ZnEasy getPng: 'https://pbs.twimg.com/profile_images/3179579549/f83f0e935fb5eff6d967e37e1a3efe5c_normal.png'
>> ~~~
>>
>> I get "MessageNotUnderstood: receiver of "bitShift:" is nil". Still I can browse the image in the web browser.
>>
>> Any hints?
>
> I don't know, for some reason Pharo cannot read that particular PNG. Consider:
>
> 'https://pbs.twimg.com/profile_images/3179579549/f83f0e935fb5eff6d967e37e1a3efe5c_normal.png' asUrl saveContentsToFile: 'foo.png'.
>
> $ open current/foo.png
>
> ImageReadWriter formFromFileNamed: 'foo.png'
>
> $ file current/foo.png
> current/foo.png: PNG image data, 48 x 48, 8-bit/color RGBA, non-interlaced
>
>> Cheers,
>>
>> Offray
>>
>
>
>