fix: empty url error processing event (#4469)

Author: shahargl

keep/api/models/alert.py

@@ -154,11 +154,14 @@ def prepend_https(cls, url):
             return url
 
         url = url.strip()
+        # If the URL is empty, return None to avoid validation errors
+        if not url:
+            return None
         if not url.startswith("http"):
             # @tb: in some cases we drop the event because of invalid url with no scheme
             # invalid or missing URL scheme (type=value_error.url.scheme)
             url = f"https://{url}"
-        return urllib.parse.quote(url, safe='/:?=&')
+        return urllib.parse.quote(url, safe="/:?=&")
 
     @validator("lastReceived", pre=True, always=True)
     def validate_last_received(cls, last_received):

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "keep"
-version = "0.41.12"
+version = "0.41.13"
 description = "Alerting. for developers, by developers."
 authors = ["Keep Alerting LTD"]
 packages = [{include = "keep"}]