Form field handling improvements - fixing field list handler for empty lines

changedetectionio/forms.py

@@ -37,27 +37,31 @@ valid_method = {
 
 default_method = 'GET'
 
+
 class StringListField(StringField):
     widget = widgets.TextArea()
 
     def _value(self):
         if self.data:
-            return "\r\n".join(self.data)
+            # ignore empty lines in the storage
+            data = list(filter(lambda x: len(x.strip()), self.data))
+            # Apply strip to each line
+            data = list(map(lambda x: x.strip(), data))
+            return "\r\n".join(data)
         else:
             return u''
 
     # incoming
     def process_formdata(self, valuelist):
-        if valuelist:
-            # Remove empty strings
-            cleaned = list(filter(None, valuelist[0].split("\n")))
-            self.data = [x.strip() for x in cleaned]
-            p = 1
+        if valuelist and len(valuelist[0].strip()):
+            # Remove empty strings, stripping and splitting \r\n, only \n etc.
+            self.data = valuelist[0].splitlines()
+            # Remove empty lines from the final data
+            self.data = list(filter(lambda x: len(x.strip()), self.data))
         else:
             self.data = []
 
 
-
 class SaltyPasswordField(StringField):
     widget = widgets.PasswordInput()
     encrypted_password = ""

changedetectionio/tests/test_watch_fields_storage.py

@@ -20,7 +20,7 @@ def test_check_watch_field_storage(client, live_server):
 
     res = client.post(
         url_for("edit_page", uuid="first"),
-        data={ "notification_urls": "json://myapi.com",
+        data={ "notification_urls": "json://127.0.0.1:30000\r\njson://128.0.0.1\r\n",
                "minutes_between_check": 126,
                "css_filter" : ".fooclass",
                "title" : "My title",
@@ -38,8 +38,14 @@ def test_check_watch_field_storage(client, live_server):
         url_for("edit_page", uuid="first"),
         follow_redirects=True
     )
+    # checks that we dont get an error when using blank lines in the field value
+    assert not b"json://127.0.0.1\n\njson" in res.data
+    assert not b"json://127.0.0.1\r\n\njson" in res.data
+    assert not b"json://127.0.0.1\r\n\rjson" in res.data
+
+    assert b"json://127.0.0.1" in res.data
+    assert b"json://128.0.0.1" in res.data
 
-    assert b"json://myapi.com" in res.data
     assert b"126" in res.data
     assert b".fooclass" in res.data
     assert b"My title" in res.data