Fixing image size calculator for new Twitter Cards implementation.

apps/social/models.py

@@ -33,6 +33,7 @@ from utils import log as logging
 from utils import json_functions as json
 from utils.feed_functions import relative_timesince, chunks
 from utils.story_functions import truncate_chars, strip_tags, linkify, image_size
+from utils.image_functions import ImageOps
 from utils.scrubber import SelectiveScriptScrubber
 from utils import s3_utils
 from StringIO import StringIO
@@ -1478,7 +1479,7 @@ class MSharedStory(mongo.Document):
 
         self.shared_date = self.shared_date or datetime.datetime.utcnow()
         self.has_replies = bool(len(self.replies))
-
+        
         super(MSharedStory, self).save(*args, **kwargs)
         
         author = MSocialProfile.get_user(self.user_id)
@@ -2191,8 +2192,13 @@ class MSharedStory(mongo.Document):
             if any(ignore in image_source for ignore in IGNORE_IMAGE_SOURCES):
                 continue
             req = requests.get(image_source, headers=headers, stream=True)
-            datastream = StringIO(req.content[:30])
-            _, width, height = image_size(datastream)
+            try:
+                datastream = StringIO(req.content)
+                width, height = ImageOps.image_size(datastream)
+            except IOError, e:
+                logging.debug(" ***> Couldn't read image: %s / %s" % (e, image_source))
+                datastream = StringIO(req.content[:100])
+                _, width, height = image_size(datastream)
             if width <= 16 or height <= 16:
                 continue
             image_sizes.append({'src': image_source, 'size': (width, height)})
@@ -2204,7 +2210,8 @@ class MSharedStory(mongo.Document):
         self.image_count = len(image_sizes)
         self.save()
         
-        logging.debug(" ---> ~SN~FGFetched image sizes on shared story: ~SB%s images" % self.image_count)
+        logging.debug(" ---> ~SN~FGFetched image sizes on shared story: ~SB%s/%s images" % 
+                      (self.image_count, len(image_sources)))
         
         return image_sizes
     
@@ -2652,6 +2659,7 @@ class MSocialServices(mongo.Document):
         
     def post_to_twitter(self, shared_story):
         message = shared_story.generate_post_to_service_message(truncate=140)
+        shared_story.calculate_image_sizes()
         
         try:
             api = self.twitter_api()

templates/social/social_page.xhtml

@@ -28,7 +28,7 @@
         <meta property="og:image"                content="{{ active_story.image_url }}">
         {% endif %}
         <meta property="og:title"                content="{{ active_story.story_title }}">
-        <meta property="og:description"          content="{{ active_story.story_content|striptags|addslashes|safe }}"> 
+        <meta property="og:description"          content="{{ active_story.story_content|slice:":300"|striptags|addslashes|safe }}"> 
         <meta property="article:published_time"  content="{{ active_story.iso8601 }}"> 
         <meta property="article:author"          content="{{ active_story.story_authors }}">
         <meta property="article:tag"             content="{{ active_story.tags }}">    
@@ -42,8 +42,8 @@
         {% endif %}
         <meta name="twitter:site" content="@newsblur">
         <meta name="twitter:creator" content="@{{ user_social_services.twitter_username }}">
-        <meta name="twitter:title" content="{{ active_story.story_image }}">
-        <meta name="twitter:description" content="{{ active_story.story_content|striptags|addslashes|safe }}">
+        <meta name="twitter:title" content="{{ active_story.story_title }}">
+        <meta name="twitter:description" content="{{ active_story.story_content|slice:":300"|striptags|addslashes|safe }}">
     {% endif %}
     
     {% include_stylesheets "blurblog" %}

utils/image_functions.py

@@ -4,6 +4,7 @@ from PIL import Image
 from PIL import ImageOps as PILOps
 from PIL.ExifTags import TAGS
 from StringIO import StringIO
+from vendor import reseekfile
 
 PROFILE_PICTURE_SIZES = {
     'fullsize': (256, 256),
@@ -67,4 +68,10 @@ class ImageOps:
                         if value == 3:
                             image = image.rotate(180)
                         break
-        return image
+        return image
+    
+    @classmethod
+    def image_size(cls, datastream):
+        datastream = reseekfile.ReseekFile(datastream)
+        image = Image.open(datastream)
+        return image.size