server level files directly, don't try to render them on the fly

src/c3nav/mapdata/render/compose.py

@@ -1,46 +1,22 @@
-import os
+import mimetypes
 
 from django.conf import settings
+from django.core.files import File
 from django.http import HttpResponse
-from PIL import Image
 
 from c3nav.mapdata.utils.misc import get_render_path
 
 
 class LevelComposer:
-    images = {}
-    images_mtimes = {}
-
-    @classmethod
-    def _get_image(cls, filename, cached=True):
-        mtime = None
-        if cached:
-            mtime = os.path.getmtime(filename)
-            if filename in cls.images:
-                if cls.images_mtimes[filename] == mtime:
-                    return cls.images[filename]
-
-        img = Image.open(filename)
-
-        if cached:
-            cls.images[filename] = img
-            cls.images_mtimes[filename] = mtime
-
-        return img
-
-    def _get_public_level_image(self, level):
-        return self._get_image(get_render_path('png', level.name, 'full', True))
-
-    def _get_complete_level_image(self, level):
-        return self._get_image(get_render_path('png', level.name, 'full', False))
-
     def get_level_image(self, request, level):
         if settings.DIRECT_EDITING:
-            img = self._get_complete_level_image(level)
+            img = get_render_path('png', level.name, 'full', True)
         else:
-            img = self._get_public_level_image(level)
-        response = HttpResponse(content_type="image/png")
-        img.save(response, 'PNG')
+            img = get_render_path('png', level.name, 'full', False)
+
+        response = HttpResponse(content_type=mimetypes.guess_type(img)[0])
+        for chunk in File(open(img, 'rb')).chunks():
+            response.write(chunk)
         return response