Moved exception texts to constants for sync

boards/models/post/sync.py

@@ -5,6 +5,11 b' from boards.utils import get_file_mimety'
 from django.db import transaction
 from boards.models import KeyPair, GlobalId, Signature, Post, Tag
 
+EXCEPTION_NODE = 'Sync node returned an error: {}'
+EXCEPTION_OP = 'Load the OP first'
+EXCEPTION_DOWNLOAD = 'File was not downloaded'
+EXCEPTION_HASH = 'File hash does not match attachment hash'
+EXCEPTION_SIGNATURE = 'Invalid model signature for {}'
 ENCODING_UNICODE = 'unicode'
 
 TAG_MODEL = 'model'
@@ -176,7 +181,7 b' class SyncManager:'
                         if exists:
                             opening_post = Post.objects.get(global_id=op_global_id)
                         else:
-                            raise SyncException('Load the OP first')
+                            raise SyncException(EXCEPTION_OP)
                     else:
                         opening_post = None
                         tag_tags = tag_content.find(TAG_TAGS)
@@ -197,11 +202,11 b' class SyncManager:'
                         url = tag_ref.get(ATTR_URL)
                         attached_file = download(hostname + url)
                         if attached_file is None:
-                            raise SyncException('File was not dowloaded')
+                            raise SyncException(EXCEPTION_DOWNLOAD)
 
                         hash = get_file_hash(attached_file)
                         if hash != attachment.text:
-                            raise SyncException('File hash does not match attachment hash')
+                            raise SyncException(EXCEPTION_HASH)
 
                         files.append(attached_file)
 
@@ -210,8 +215,7 b' class SyncManager:'
                         opening_post=opening_post, tags=tags,
                         global_id=global_id, files=files)
         else:
-            raise SyncException('Sync node returned an error: {}'.format(
-                tag_status.text))
+            raise SyncException(EXCEPTION_NODE.format(tag_status.text))
 
     @staticmethod
     def generate_response_pull():
@@ -247,7 +251,7 b' class SyncManager:'
                                   signature=signature_value)
 
             if not KeyPair.objects.verify(signature, content_str):
-                raise SyncException('Invalid model signature for {}'.format(content_str))
+                raise SyncException(EXCEPTION_SIGNATURE.format(content_str))
 
             signatures.append(signature)