Download/mimetype for web page urls. Issue 713

gracedb/api.py

@@ -631,8 +631,14 @@ def download(request, graceid, filename=""):
         response = HttpResponseNotFound("File not readable")
     elif os.path.isfile(filepath):
         # get an actual file.
-        response = HttpResponse(open(filepath, "r"), content_type="application/octet-stream")
-        response['Content-Disposition'] = 'attachment; filename=%s' % os.path.basename(filename)
+        content_type, encoding = VersionedFile.guess_mimetype(filepath)
+        content_type = content_type or "application/octet-stream"
+        # XXX encoding should probably not be ignored.
+        response = HttpResponse(open(filepath, "r"), content_type=content_type)
+        if content_type == "application/octet-stream":
+            response['Content-Disposition'] = 'attachment; filename=%s' % os.path.basename(filename)
+        if encoding is not None:
+            response['Content-Encoding'] = encoding
     elif not filename:
         # Get list of files w/urls.
         rv = {}