Browser Steps - General error handling improvements (#2083)

changedetectionio/content_fetcher.py

@@ -43,9 +43,11 @@ class JSActionExceptions(Exception):
         return
 
 
-class BrowserStepsStepTimout(Exception):
+class BrowserStepsStepException(Exception):
-    def __init__(self, step_n):
+    def __init__(self, step_n, original_e):
         self.step_n = step_n
+        self.original_e = original_e
+        print(f"Browser Steps exception at step {self.step_n}", str(original_e))
         return
 
 
@@ -173,7 +175,7 @@ class Fetcher():
 
     def iterate_browser_steps(self):
         from changedetectionio.blueprint.browser_steps.browser_steps import steppable_browser_interface
-        from playwright._impl._errors import TimeoutError
+        from playwright._impl._errors import TimeoutError, Error
         from jinja2 import Environment
         jinja2_env = Environment(extensions=['jinja2_time.TimeExtension'])
 
@@ -203,10 +205,10 @@ class Fetcher():
                                                       optional_value=optional_value)
                     self.screenshot_step(step_n)
                     self.save_step_html(step_n)
-                except TimeoutError as e:
+
-                    print(str(e))
+                except (Error, TimeoutError) as e:
                     # Stop processing here
-                    raise BrowserStepsStepTimout(step_n=step_n)
+                    raise BrowserStepsStepException(step_n=step_n, original_e=e)
 
     # It's always good to reset these
     def delete_browser_steps_screenshots(self):

changedetectionio/update_worker.py

@@ -354,20 +354,32 @@ class update_worker(threading.Thread):
                         changed_detected = False
                         self.datastore.update_watch(uuid=uuid, update_obj={'last_error': False})
 
-                    except content_fetcher.BrowserStepsStepTimout as e:
+                    except content_fetcher.BrowserStepsStepException as e:
 
                         if not self.datastore.data['watching'].get(uuid):
                             continue
 
                         error_step = e.step_n + 1
-                        err_text = f"Warning, browser step at position {error_step} could not run, target not found, check the watch, add a delay if necessary, view Browser Steps to see screenshot at that step"
+                        from playwright._impl._errors import TimeoutError, Error
+
+                        # Generally enough info for TimeoutError (couldnt locate the element after default seconds)
+                        err_text = f"Browser step at position {error_step} could not run, check the watch, add a delay if necessary, view Browser Steps to see screenshot at that step."
+
+                        if e.original_e.name == "TimeoutError":
+                            # Just the first line is enough, the rest is the stack trace
+                            err_text += " Could not find the target."
+                        else:
+                            # Other Error, more info is good.
+                            err_text += " " + str(e.original_e).splitlines()[0]
+
+                        print(f"BrowserSteps exception at step {error_step}", str(e.original_e))
+
                         self.datastore.update_watch(uuid=uuid,
                                                     update_obj={'last_error': err_text,
                                                                 'browser_steps_last_error_step': error_step
                                                                 }
                                                     )
 
-
                         if self.datastore.data['watching'][uuid].get('filter_failure_notification_send', False):
                             c = self.datastore.data['watching'][uuid].get('consecutive_filter_failures', 5)
                             c += 1