fix: use regex search op to filter http requests (#634)

* fix: use regex search op to filter http requests
* test: search regex with anything at start and end should still match

src/lumigo_opentelemetry/libs/sampling.py

@@ -103,7 +103,7 @@ def does_endpoint_match_env_var_filtering_regex(
     if not regexes:
         return False
 
-    return any(does_match_regex_safe(regex, endpoint) for regex in regexes)
+    return any(does_search_regex_find_safe(regex, endpoint) for regex in regexes)
 
 
 def does_endpoint_match_client_filtering_regexes(endpoint: str) -> bool:
@@ -124,12 +124,12 @@ def does_endpoint_match_filtering_regexes(endpoint: str) -> bool:
     )
 
 
-def does_match_regex_safe(regex: str, value: str) -> bool:
+def does_search_regex_find_safe(regex: str, value: str) -> bool:
     if not regex or value is None:
         return False
 
     try:
-        return re.match(regex, value) is not None
+        return re.search(regex, value) is not None
     except Exception:
         logger.warning(f"Invalid regex: {regex}")
         return False

src/test/unit/libs/test_sampling.py

@@ -5,7 +5,7 @@
 from lumigo_opentelemetry.libs.sampling import (
     _extract_endpoint,
     _get_string_list_from_env_var,
-    does_match_regex_safe,
+    does_search_regex_find_safe,
     does_endpoint_match_filtering_regexes,
     AttributeSampler,
 )
@@ -85,6 +85,15 @@ def test_does_endpoint_match_filtering_regexes(
         ("a", "", False),
         ("a", "a", True),
         ("a", "b", False),
+        # Make sure that the regex is searched and not matched
+        ("word", "search for one word in this sentence", True),
+        (".*word.*", "search for one word in this sentence", True),
+        (r"^word$", "search for one word in this sentence", False),
+        (
+            r"^search for one word in this sentence$",
+            "search for one word in this sentence",
+            True,
+        ),
         # This is an invalid regex, but we want to make sure it doesn't crash
         ("[", "", False),
         ("[", "[", False),
@@ -94,8 +103,8 @@ def test_does_endpoint_match_filtering_regexes(
         ("", None, False),
     ],
 )
-def test_does_match_regex_safe(regex, value, should_match):
-    assert does_match_regex_safe(regex, value) == should_match
+def test_does_search_regex_find_safe(regex, value, should_match):
+    assert does_search_regex_find_safe(regex, value) == should_match
 
 
 @pytest.mark.parametrize(