resize photos

apps/news/management/commands/news_optimize_images.py

@@ -29,21 +29,22 @@ class Command(BaseCommand):
     def optimize(self, text, alias, max_size):
         """optimize news images"""
         for image in get_url_images_in_text(text):
-            size = get_page_size_by_url(image)
+            size, width, height = get_page_size_by_url(image)
 
             if size < max_size:
                 continue
 
-            quality = round(max_size / (size * 0.01))
+            percents = round(max_size / (size * 0.01))
+            width = round(width * percents / 100)
+            height = round(height * percents / 100)
             optimized_image = get_thumbnail(
                 file_=image,
-                **settings.SORL_THUMBNAIL_ALIASES[alias],
+                geometry_string=f'{width}x{height}',
-                quality=100,
                 upscale=False
             ).url
             text = text.replace(image, optimized_image)
             self.stdout.write(self.style.SUCCESS(f'Optimized {image} -> {optimized_image}\n'
-                                                 f'Quality [{quality}%]\n'))
+                                                 f'Quality [{percents}%]\n'))
 
         return text
 
@@ -58,11 +59,11 @@ class Command(BaseCommand):
         self.optimize('https://upload.wikimedia.org/wikipedia/commons/b/b9/Pizigani_1367_Chart_1MB.jpg',
                       'news_description', size)
 
-        for news in News.objects.all():
+        # for news in News.objects.all():
-            if not isinstance(news.description, dict):
+        #     if not isinstance(news.description, dict):
-                continue
+        #         continue
-            news.description = {
+        #     news.description = {
-                locale: self.optimize(text, alias, size)
+        #         locale: self.optimize(text, alias, size)
-                for locale, text in news.description.items()
+        #         for locale, text in news.description.items()
-            }
+        #     }
-            news.save()
+        #     news.save()

apps/utils/methods.py

@@ -3,6 +3,8 @@ import logging
 import random
 import re
 import string
+from io import BytesIO
+from PIL import Image
 from collections import namedtuple
 
 import requests
@@ -175,7 +177,9 @@ def get_url_images_in_text(text):
     """Find images urls in text"""
     return re.findall(r'(?:http:|https:)?//.*\.(?:png|jpg|svg)', text)
 
-def get_page_size_by_url(url):
+def get_page_size_by_url(url) -> (int, int, int):
-    """Get page size by Content-Length header"""
+    """Returns image size (bytes, width, height)"""
-    response = requests.head(url)
+    image_raw = requests.get(url)
-    return int(response.headers.get('content-length'))
+    image = Image.open(BytesIO(image_raw.content))
+    width, height = image.size
+    return int(image_raw.headers.get('content-length')), width, height

apps/utils/thumbnail_engine.py

@@ -5,13 +5,11 @@ from sorl.thumbnail.engines.pil_engine import Engine as PILEngine
 class GMEngine(PILEngine):
 
     def create(self, image, geometry, options):
-        """
-        Processing conductor, returns the thumbnail as an image engine instance
-        """
         image = self.cropbox(image, geometry, options)
         image = self.orientation(image, geometry, options)
         image = self.colorspace(image, geometry, options)
         image = self.remove_border(image, options)
+        image = self.scale(image, geometry, options)
         image = self.crop(image, geometry, options)
         image = self.rounded(image, geometry, options)
         image = self.blur(image, geometry, options)