From 8a4618ffe02c29731b02c940566e711eb772a573 Mon Sep 17 00:00:00 2001
From: Pea Tyczynska <pea.tyczynska@digital.cabinet-office.gov.uk>
Date: Wed, 4 Mar 2020 17:26:19 +0000
Subject: [PATCH] Fix logo upload - we need to rewind the bytestream after we
 read it

---
 app/main/validators.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/main/validators.py b/app/main/validators.py
index 503c884ea..39bf2fb0b 100644
--- a/app/main/validators.py
+++ b/app/main/validators.py
@@ -86,7 +86,9 @@ class NoEmbeddedImagesInSVG:
         self.message = message
 
     def __call__(self, form, field):
-        if '<image' in field.data.stream.read().decode("utf-8"):
+        is_image_embedded = '<image' in field.data.stream.read().decode("utf-8")
+        field.data.stream.seek(0)
+        if is_image_embedded:
             raise ValidationError(self.message)