Re: send PIL.Image to django server side and get it back
Thanks, I solved it finally stackoverflow.com/a/51453785/1485853 -- https://mail.python.org/mailman/listinfo/python-list
Re: send PIL.Image to django server side and get it back
On Mon, Jul 16, 2018 at 06:40:45AM -0700, Christos Georgiou - ΤΖΩΤΖΙΟΥ wrote: > You need first to serialize the object to bytes that can go over the > wire. There is no predefined way to do that, so you can: > > >>> import io > >>> file_like_object = io.BytesIO() > >>> PILImage.save(file_like_object, format='png') > > and then in your POST request send file_like_object.getvalue() as the > image data. You will most probably need to add a Content-Type: > image/png as a header. If you definitely need to send the data as a string, because you want to use a JSON object or similar, I've done this in the past using base64 encoding. https://docs.python.org/2/library/base64.html Cheers, -- José María (Chema) Mateos https://rinzewind.org/blog-es || https://rinzewind.org/blog-en -- https://mail.python.org/mailman/listinfo/python-list
send PIL.Image to django server side and get it back
I also posted the question here
https://stackoverflow.com/questions/51355926/send-pil-image-to-django-server-side-and-get-it-back
I don't know what's under the hood of sending an image from client side to
server side, so stuck by the following scenario.
I want to send a PIL.Image object to django server side using the Python
requests lib and get it back in order to use the PIL.Image object on server
side. As I have tested , if sent the PIL.Image object without any conversion ,
that is
r = requests.post(SERVER_URL,
data={
'image': PILimage,#PILimage is of type PIL.Image
'wordPos':(86,23)
},
)
then I just got a str object with value on server side, I guess it was caused by
requests, which converted the PIL.Image object to a str object before sending,
so why requestsdo the conversion ? why cannot we send the PIL.Image object
without any conversion over the Internet ? please give some explanation here,
thanks!
--
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Re: send PIL.Image to django server side and get it back
On Monday, July 16, 2018 at 3:52:09 PM UTC+3, iMath wrote:
> I also posted the question here
> https://stackoverflow.com/questions/51355926/send-pil-image-to-django-server-side-and-get-it-back
>
> I don't know what's under the hood of sending an image from client side to
> server side, so stuck by the following scenario.
>
> I want to send a PIL.Image object to django server side using the Python
> requests lib and get it back in order to use the PIL.Image object on server
> side. As I have tested , if sent the PIL.Image object without any conversion
> , that is
>
> r = requests.post(SERVER_URL,
> data={
> 'image': PILimage,#PILimage is of type PIL.Image
> 'wordPos':(86,23)
> },
> )
> then I just got a str object with value image mode=RGB size=149x49 at 0x13F25D0> on server side, I guess it was
> caused by requests, which converted the PIL.Image object to a str object
> before sending, so why requestsdo the conversion ? why cannot we send the
> PIL.Image object without any conversion over the Internet ? please give some
> explanation here, thanks!
You need first to serialize the object to bytes that can go over the wire.
There is no predefined way to do that, so you can:
>>> import io
>>> file_like_object = io.BytesIO()
>>> PILImage.save(file_like_object, format='png')
and then in your POST request send file_like_object.getvalue() as the image
data. You will most probably need to add a Content-Type: image/png as a header.
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