Ability for watch to use a more obvious system default fetcher (#1320)

changedetectionio/__init__.py

@@ -571,6 +571,8 @@ def changedetection_app(config=None, datastore_o=None):
                                data=default,
                                )
 
+        form.fetch_backend.choices.append(("system", 'System settings default'))
+
         # form.browser_steps[0] can be assumed that we 'goto url' first
 
         if datastore.proxy_list is None:
@@ -599,10 +601,6 @@ def changedetection_app(config=None, datastore_o=None):
                     using_default_check_time = False
                     break
 
-            # Use the default if it's the same as system-wide.
-            if form.fetch_backend.data == datastore.data['settings']['application']['fetch_backend']:
-                extra_update_obj['fetch_backend'] = None
-
 
 
              # Ignore text
@@ -652,8 +650,10 @@ def changedetection_app(config=None, datastore_o=None):
 
             watch = datastore.data['watching'].get(uuid)
             system_uses_webdriver = datastore.data['settings']['application']['fetch_backend'] == 'html_webdriver'
-            is_html_webdriver = True if watch.get('fetch_backend') == 'html_webdriver' or (
+
-                    watch.get('fetch_backend', None) is None and system_uses_webdriver) else False
+            is_html_webdriver = False
+            if (watch.get('fetch_backend') == 'system' and system_uses_webdriver) or watch.get('fetch_backend') == 'html_requests':
+                is_html_webdriver = True
 
             output = render_template("edit.html",
                                      browser_steps_config=browser_step_ui_config,

changedetectionio/fetch_site_status.py

@@ -92,9 +92,8 @@ class perform_site_check():
 
         # Pluggable content fetcher
         prefer_backend = watch.get_fetch_backend
-        # @todo move this to Watch model get_fetch_backend
+        if not prefer_backend or prefer_backend == 'system':
-        if not prefer_backend:
+            prefer_backend = self.datastore.data['settings']['application']['fetch_backend']
-            prefer_backend =  self.datastore.data['settings']['application']['fetch_backend']
 
         if hasattr(content_fetcher, prefer_backend):
             klass = getattr(content_fetcher, prefer_backend)

changedetectionio/forms.py

@@ -138,7 +138,7 @@ class ValidateContentFetcherIsReady(object):
         from changedetectionio import content_fetcher
 
         # Better would be a radiohandler that keeps a reference to each class
-        if field.data is not None:
+        if field.data is not None and field.data != 'system':
             klass = getattr(content_fetcher, field.data)
             some_object = klass()
             try:
@@ -345,6 +345,7 @@ class quickWatchForm(Form):
     edit_and_watch_submit_button = SubmitField('Edit > Watch', render_kw={"class": "pure-button pure-button-primary"})
 
 
+
 # Common to a single watch and the global settings
 class commonSettingsForm(Form):
     notification_urls = StringListField('Notification URL List', validators=[validators.Optional(), ValidateAppRiseServers()])

changedetectionio/static/js/watch-settings.js

@@ -1,7 +1,7 @@
-$(document).ready(function() {
+$(document).ready(function () {
     function toggle() {
         if ($('input[name="fetch_backend"]:checked').val() == 'html_webdriver') {
-            if(playwright_enabled) {
+            if (playwright_enabled) {
                 // playwright supports headers, so hide everything else
                 // See #664
                 $('#requests-override-options #request-method').hide();
@@ -14,9 +14,14 @@ $(document).ready(function() {
                 $('#requests-override-options').hide();
             }
 
-
             $('#webdriver-override-options').show();
 
+        } else if ($('input[name="fetch_backend"]:checked').val() == 'system') {
+            $('#requests-override-options #request-method').hide();
+            $('#requests-override-options #request-body').hide();
+            $('#ignore-status-codes-option').hide();
+            $('#requests-override-options').hide();
+            $('#webdriver-override-options').hide();
         } else {
 
             $('#requests-override-options').show();