Allow configuring Pillow maximum image size

[wrenix]

i have a big scan of an old graph, i like to use that without qualitylost

Change of possible max Imagesize:

[2024-12-08 18:20:29 +0000] [17] [ERROR] Error handling request /api/media/aID/thumbnail/1000?jwt=SECRET&square=false
Traceback (most recent call last):                                                                                                                                                                                                                      File "/usr/local/lib/python3.11/dist-packages/gunicorn/workers/sync.py", line 134, in handle                                                                                                                                                              self.handle_request(listener, req, client, addr) 
   File "/usr/local/lib/python3.11/dist-packages/gunicorn/workers/sync.py", line 177, in handle_request                                                                                                                                                 
     respiter = self.wsgi(environ, resp.start_response)                                                                                                                                                                                                 
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                 
   File "/usr/local/lib/python3.11/dist-packages/flask/app.py", line 1536, in __call__                                                                                                                                                                  
     return self.wsgi_app(environ, start_response)                                                                                                                                                                                                      
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                      
   File "/usr/local/lib/python3.11/dist-packages/flask/app.py", line 1514, in wsgi_app                                                                                                                                                                  
     response = self.handle_exception(e)                                                                                                                                                                                                                
                ^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                                
   File "/usr/local/lib/python3.11/dist-packages/flask/app.py", line 1511, in wsgi_app                                                                                                                                                                  
     response = self.full_dispatch_request()                                                                                                                                                                                                            
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                            
   File "/usr/local/lib/python3.11/dist-packages/flask/app.py", line 919, in full_dispatch_request                                                                                                                                                      
     rv = self.handle_user_exception(e)                                                                                                                                                                                                                 
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                                 
   File "/usr/local/lib/python3.11/dist-packages/flask/app.py", line 917, in full_dispatch_request                                                                                                                                                      
     rv = self.dispatch_request()                                                                                                                                                                                                                       
          ^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                                       
   File "/usr/local/lib/python3.11/dist-packages/flask/app.py", line 902, in dispatch_request                                                                                                                                                           
     return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)  # type: ignore[no-any-return]                                                                                                                                            
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                           
   File "/usr/local/lib/python3.11/dist-packages/gramps_webapi/api/auth.py", line 44, in wrapper                                                                                                                                                        
     return func(*args, **kwargs)                                                                                                                                                                                                                       
            ^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                                       
   File "/usr/local/lib/python3.11/dist-packages/webargs/core.py", line 657, in wrapper                                                                                                                                                                 
     return func(*args, **kwargs)                                                                                                                                                                                                                       
            ^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                                       
   File "/usr/local/lib/python3.11/dist-packages/flask_caching/__init__.py", line 426, in decorated_function                                                                                                                                            
     rv = self._call_fn(f, *args, **kwargs)                                                                                                                                                                                                             
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                             
   File "/usr/local/lib/python3.11/dist-packages/flask_caching/__init__.py", line 185, in _call_fn                                                                                                                                                      
     return ensure_sync(fn)(*args, **kwargs)                                                                                                                                                                                                            
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                            
   File "/usr/local/lib/python3.11/dist-packages/gramps_webapi/api/__init__.py", line 416, in get_thumbnail                                                                                                                                             
     return handler.send_thumbnail(size=size, square=args["square"])                                                                                                                                                                                    
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                    
   File "/usr/local/lib/python3.11/dist-packages/gramps_webapi/api/file.py", line 225, in send_thumbnail                                                                                                                                                
     buffer = thumb.get_thumbnail(size=size, square=square)                                                                                                                                                                                             
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                             
   File "/usr/local/lib/python3.11/dist-packages/gramps_webapi/api/image.py", line 186, in get_thumbnail                                                                                                                                                
     img = self.get_image()                                                                                                                                                                                                                             
           ^^^^^^^^^^^^^^^^                                                                                                                                                                                                                             
   File "/usr/local/lib/python3.11/dist-packages/gramps_webapi/api/image.py", line 127, in get_image                                                                                                                                                    
     return Image.open(self.stream)                                                                                                                                                                                                                     
            ^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                                     
   File "/usr/lib/python3/dist-packages/PIL/Image.py", line 3268, in open                                                                                                                                                                               
     im = _open_core(fp, filename, prefix, formats)                                                                                                                                                                                                     
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                                                                                                                                                                                     
   File "/usr/lib/python3/dist-packages/PIL/Image.py", line 3255, in _open_core                                                                                                                                                                         
     _decompression_bomb_check(im.size)
   File "/usr/lib/python3/dist-packages/PIL/Image.py", line 3164, in _decompression_bomb_check
     raise DecompressionBombError(msg)                                                                                                                                                                                                                   PIL.Image.DecompressionBombError: Image size (209000000 pixels) exceeds limit of 178956970 pixels, could be decompression bomb DOS attack. 

[DavidMStraub]

So, this is a feature request to allow customizing Pillow max image size?

I wouldn't mind having this if somebody contributes it - just add a new config option PILLOW_MAX_IMAGE_PIXELS which should default to PIL.Image.MAX_IMAGE_PIXELS.