From 85897e0bf9315d4a5af2d5a4aa17deec4df33821 Mon Sep 17 00:00:00 2001
From: dgtlmoon <dgtlmoon@gmail.com>
Date: Mon, 17 Oct 2022 17:40:28 +0200
Subject: [PATCH] Windows - diff file handling improvements (#1031)

---
 changedetectionio/__init__.py    | 10 ++++++----
 changedetectionio/model/Watch.py | 11 ++++++-----
 2 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/changedetectionio/__init__.py b/changedetectionio/__init__.py
index c8d8c52f..096070ef 100644
--- a/changedetectionio/__init__.py
+++ b/changedetectionio/__init__.py
@@ -816,9 +816,11 @@ def changedetection_app(config=None, datastore_o=None):
 
         newest_file = history[dates[-1]]
 
+        # Read as binary and force decode as UTF-8
+        # Windows may fail decode in python if we just use 'r' mode (chardet decode exception)
         try:
-            with open(newest_file, 'r') as f:
-                newest_version_file_contents = f.read()
+            with open(newest_file, 'rb') as f:
+                newest_version_file_contents = f.read().decode('utf-8')
         except Exception as e:
             newest_version_file_contents = "Unable to read {}.\n".format(newest_file)
 
@@ -830,8 +832,8 @@ def changedetection_app(config=None, datastore_o=None):
             previous_file = history[dates[-2]]
 
         try:
-            with open(previous_file, 'r') as f:
-                previous_version_file_contents = f.read()
+            with open(previous_file, 'rb') as f:
+                previous_version_file_contents = f.read().decode('utf-8')
         except Exception as e:
             previous_version_file_contents = "Unable to read {}.\n".format(previous_file)
 
diff --git a/changedetectionio/model/Watch.py b/changedetectionio/model/Watch.py
index b7aaca86..9a87ad71 100644
--- a/changedetectionio/model/Watch.py
+++ b/changedetectionio/model/Watch.py
@@ -151,28 +151,29 @@ class model(dict):
         import uuid
         import logging
 
-        output_path = "{}/{}".format(self.__datastore_path, self['uuid'])
+        output_path = os.path.join(self.__datastore_path, self['uuid'])
 
         self.ensure_data_dir_exists()
+        snapshot_fname = os.path.join(output_path, str(uuid.uuid4()))
 
-        snapshot_fname = "{}/{}.stripped.txt".format(output_path, uuid.uuid4())
         logging.debug("Saving history text {}".format(snapshot_fname))
 
+        # in /diff/ we are going to assume for now that it's UTF-8 when reading
         with open(snapshot_fname, 'wb') as f:
             f.write(contents)
             f.close()
 
         # Append to index
         # @todo check last char was \n
-        index_fname = "{}/history.txt".format(output_path)
+        index_fname = os.path.join(output_path, "history.txt")
         with open(index_fname, 'a') as f:
             f.write("{},{}\n".format(timestamp, snapshot_fname))
             f.close()
 
         self.__newest_history_key = timestamp
-        self.__history_n+=1
+        self.__history_n += 1
 
-        #@todo bump static cache of the last timestamp so we dont need to examine the file to set a proper ''viewed'' status
+        # @todo bump static cache of the last timestamp so we dont need to examine the file to set a proper ''viewed'' status
         return snapshot_fname
 
     @property