Ticket #4105: media_tag.diff

django/template/defaulttags.py

@@ -374 +374 @@
         context.pop()
         return output
 
+class MediaURLNode(Node):
+    def __init__(self, path):
+        self.path = path
+
+    def render(self, context):
+        import urlparse
+        import os.path
+        if os.path.exists(os.path.join(settings.MEDIA_ROOT, self.path)):
+            return urlparse.urljoin(settings.MEDIA_URL, self.path);
+        return ''
+
 #@register.tag
 def comment(parser, token):
     """
@@ -1009 +1020 @@
     parser.delete_first_token()
     return WithNode(var, name, nodelist)
 do_with = register.tag('with', do_with)
+
+#@register.tag
+def media(parser, token):
+    """
+    Returns an absolute URL pointing to the given media file.
+
+    The first argument is the path to the file starting from MEDIA_ROOT.
+    If the file doesn't exist, empty string '' is returned.
+
+    For example if you have the following in your settings:
+
+        MEDIA_URL = 'http://media.example.com'
+
+    then in your template you can get the URL for css/mystyle.css like this:
+
+        {% media 'css/mystyle.css' %}
+
+    This URL will be returned: http://media.example.com/css/style.css.
+    """
+    bits = list(token.split_contents())
+    if len(bits) != 2:
+        raise TemplateSyntaxError("%r tag takes one argument" % bits[0])
+
+    path = bits[1]
+    return MediaURLNode(path[1:-1])
+media = register.tag(media)