handle network errors and arbitrary errors during title resolution

sde_collections/models/delta_patterns.py

@@ -425,7 +425,7 @@ def generate_title_for_url(self, url_obj) -> tuple[str, str | None]:
 
         try:
             return resolve_title(self.title_pattern, context), None
-        except (ValueError, ValidationError) as e:
+        except Exception as e:
             return None, str(e)
 
     def apply(self) -> None:

sde_collections/utils/title_resolver.py

@@ -63,29 +63,33 @@ def resolve_xpath(xpath: str, url: str) -> str:
     if not is_valid_xpath(xpath):
         raise ValueError(f"The xpath, {xpath}, is not valid.")
 
-    response = requests.get(url)
-
-    if response.ok:
-        tree = html.fromstring(response.content)
-        values = tree.xpath(xpath)
-
-        if len(values) == 1:
-            if isinstance(values[0], str):
-                text_content = values[0]
-            else:
-                text_content = values[0].text
-
-            if text_content:
-                text_content = clean_text(text_content)
-                return text_content
+    try:
+        response = requests.get(url)
+
+        if response.ok:
+            tree = html.fromstring(response.content)
+            values = tree.xpath(xpath)
+
+            if len(values) == 1:
+                if isinstance(values[0], str):
+                    text_content = values[0]
+                else:
+                    text_content = values[0].text
+
+                if text_content:
+                    text_content = clean_text(text_content)
+                    return text_content
+                else:
+                    raise ValueError(f"The element at the xpath, {xpath}, does not contain any text content.")
+            elif len(values) > 1:
+                raise ValueError(f"More than one element found for the xpath, {xpath}")
             else:
-                raise ValueError(f"The element at the xpath, {xpath}, does not contain any text content.")
-        elif len(values) > 1:
-            raise ValueError(f"More than one element found for the xpath, {xpath}")
+                raise ValueError(f"No element found for the xpath, {xpath}")
         else:
-            raise ValueError(f"No element found for the xpath, {xpath}")
-    else:
-        raise ValueError(f"Failed to retrieve the {url}. Status code: {response.status_code}")
+            raise ValueError(f"Failed to retrieve the {url}. Status code: {response.status_code}")
+
+    except requests.RequestException as e:
+        raise ValueError(f"Network error while accessing {url}: {str(e)}")
 
 
 def parse_title(input_string: str) -> list[tuple[str, str]]: