Fix backup generation on relative paths (like when run outside docker, under venv, etc)

backend/__init__.py

@@ -436,6 +436,7 @@ def changedetection_app(config=None, datastore_o=None):
     # We're good but backups are even better!
     @app.route("/backup", methods=['GET'])
     def get_backup():
+
         import zipfile
         from pathlib import Path
 
@@ -444,26 +445,30 @@ def changedetection_app(config=None, datastore_o=None):
 
         # We only care about UUIDS from the current index file
         uuids = list(datastore.data['watching'].keys())
+        backup_filepath = os.path.join(app.config['datastore_path'], backupname)
 
-        with zipfile.ZipFile(os.path.join(app.config['datastore_path'], backupname), 'w',
+        with zipfile.ZipFile(backup_filepath, "w",
                              compression=zipfile.ZIP_DEFLATED,
-                             compresslevel=6) as zipObj:
+                             compresslevel=8) as zipObj:
 
             # Be sure we're written fresh
             datastore.sync_to_json()
 
+            os.chdir(app.config['datastore_path'])
+
             # Add the index
-            zipObj.write(os.path.join(app.config['datastore_path'], "url-watches.json"))
-            # Add any snapshot data we find
+            zipObj.write(os.path.join(app.config['datastore_path'], "url-watches.json"), arcname="url-watches.json")
+
+            # Add any snapshot data we find, use the full path to access the file, but make the file 'relative' in the Zip.
             for txt_file_path in Path(app.config['datastore_path']).rglob('*.txt'):
                 parent_p = txt_file_path.parent
                 if parent_p.name in uuids:
-                    zipObj.write(txt_file_path)
+                    zipObj.write(txt_file_path,
+                                 arcname=str(txt_file_path).replace(app.config['datastore_path'], ''),
+                                 compress_type=zipfile.ZIP_DEFLATED,
+                                 compresslevel=8)
 
-        return send_file(os.path.join(app.config['datastore_path'], backupname),
-                         as_attachment=True,
-                         mimetype="application/zip",
-                         attachment_filename=backupname)
+        return send_from_directory(app.config['datastore_path'], backupname)
 
     @app.route("/static/<string:group>/<string:filename>", methods=['GET'])
     def static_content(group, filename):

changedetection.py

@@ -3,6 +3,7 @@
 # Launch as a eventlet.wsgi server instance.
 
 import getopt
+import os
 import sys
 
 import eventlet
@@ -15,7 +16,9 @@ from backend import store
 def main(argv):
     ssl_mode = False
     port = 5000
-    datastore_path = "./datastore"
+
+    # Must be absolute so that send_from_directory doesnt try to make it relative to backend/
+    datastore_path = os.path.join(os.getcwd(), "datastore")
 
     try:
         opts, args = getopt.getopt(argv, "sd:p:", "purge")
@@ -38,8 +41,6 @@ def main(argv):
         if opt == '-d':
             datastore_path = arg
 
-
-
     # threads can read from disk every x seconds right?
     # front end can just save
     # We just need to know which threads are looking at which UUIDs