Don't set content-length in StaticFileHandler unless we're actually

sending the content.  Some browsers get confused by this (e.g. the
version of webkit embedded in fluid, but not the version used in chrome).

tornado/web.py

@@ -1110,7 +1110,6 @@ class StaticFileHandler(RequestHandler):
         modified = datetime.datetime.fromtimestamp(stat_result[stat.ST_MTIME])
 
         self.set_header("Last-Modified", modified)
-        self.set_header("Content-Length", stat_result[stat.ST_SIZE])
         if "v" in self.request.arguments:
             self.set_header("Expires", datetime.datetime.utcnow() + \
                                        datetime.timedelta(days=365*10))
@@ -1133,6 +1132,7 @@ class StaticFileHandler(RequestHandler):
 
         if not include_body:
             return
+        self.set_header("Content-Length", stat_result[stat.ST_SIZE])
         file = open(abspath, "r")
         try:
             self.write(file.read())