Add the validation for empty texts.

gliner_inference_server/helpers.py

@@ -27,13 +27,40 @@ def validate_single_or_batch(text: Optional[str], texts: Optional[List[str]]):
             }
         )
 
+    if text == "" and texts is None:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail={
+                "error": {
+                    "code": "INVALID_INPUT",
+                    "message": "'text' cannot be empty or only whitespace",
+                    "details": {}
+                }
+            }
+        )
+
     if texts is not None and len(texts) == 0:
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
             detail={
                 "error": {
                     "code": "INVALID_INPUT",
-                    "message": "texts list cannot be empty",
+                    "message": "Texts list cannot be empty",
+                    "details": {}
+                }
+            }
+        )
+
+    if texts is not None and len(texts) != 0:
+        # Check for empty strings within the list
+        for i, t in enumerate(texts):
+            if not isinstance(t, str) or not t.strip():
+                raise HTTPException(
+                    status_code=status.HTTP_400_BAD_REQUEST,
+                    detail={
+                        "error": {
+                            "code": "INVALID_INPUT",
+                            "message": f"Text item at index {i} in 'texts' cannot be empty or only whitespace",
                             "details": {}
                         }
                     }

tests/test_general_endpoint.py

@@ -82,6 +82,53 @@ class TestGeneralEndpoint:
         assert "error" in error
         assert error["error"]["code"] == "INVALID_INPUT"
 
+    def test_error_empty_text_provided(self, api_client):
+        """Test error when the text is empty"""
+        payload = {
+            "text": "",
+            "entities": ["organization"]
+        }
+        response = api_client.post(f"{BASE_URL}/general", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_texts_has_empty_value(self, api_client):
+        """Test error when texts has an empty value"""
+        payload = {
+            "texts": [
+                "Apple Inc. was founded by Steve Jobs in California.",
+                "",
+                "Elon Musk leads Tesla and SpaceX."
+            ],
+            "entities": ["organization"]
+        }
+        response = api_client.post(f"{BASE_URL}/general", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_texts_has_empty_values(self, api_client):
+        """Test error when texts has empty values"""
+        payload = {
+            "texts": [
+                "",
+                "",
+                ""
+            ],
+            "entities": ["organization"]
+        }
+        response = api_client.post(f"{BASE_URL}/general", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
     def test_error_empty_entities_list(self, api_client):
         """Test error with an empty entities list"""
         payload = {

tests/test_relation_extraction_endpoint.py

@@ -85,3 +85,63 @@ class TestRelationExtractionEndpoint:
         response = api_client.post(f"{BASE_URL}/relation-extraction", json=payload)
         assert response.status_code == 400
 
+    def test_error_no_text_provided(self, api_client):
+        """Test error when neither text nor texts is provided"""
+        payload = {
+            "text": "",
+            "relations": ["founded"]
+        }
+        response = api_client.post(f"{BASE_URL}/relation-extraction", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_empty_text_provided(self, api_client):
+        """Test error when the text is empty"""
+        payload = {
+            "relations": ["founded"]
+        }
+        response = api_client.post(f"{BASE_URL}/relation-extraction", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_texts_has_empty_value(self, api_client):
+        """Test error when texts has an empty value"""
+        payload = {
+            "texts": [
+                "Bill Gates founded Microsoft.",
+                "",
+                "Apple is based in California."
+            ],
+            "relations": ["founded", "founded_by", "based_in"],
+            "threshold": 0.3
+        }
+        response = api_client.post(f"{BASE_URL}/relation-extraction", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_texts_has_empty_values(self, api_client):
+        """Test error when texts has empty values"""
+        payload = {
+            "texts": [
+                "",
+                "",
+                ""
+            ],
+            "relations": ["founded", "founded_by", "based_in"],
+            "threshold": 0.3
+        }
+        response = api_client.post(f"{BASE_URL}/relation-extraction", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"

tests/test_summarization_endpoint.py

@@ -57,3 +57,54 @@ class TestSummarizationEndpoint:
         }
         response = api_client.post(f"{BASE_URL}/summarization", json=payload)
         assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_empty_text(self, api_client):
+        """Test error when the text is empty"""
+        payload = {
+            "text": "",
+            "threshold": 0.5
+        }
+        response = api_client.post(f"{BASE_URL}/summarization", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_texts_has_empty_value(self, api_client):
+        """Test error when texts has an empty value"""
+        payload = {
+            "texts": [
+                "Python is a high-level programming language. It's known for its simplicity and readability.",
+                "",
+                "Rust is a systems programming language. It focuses on safety and performance."
+            ],
+            "threshold": 0.3
+        }
+        response = api_client.post(f"{BASE_URL}/summarization", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"
+
+    def test_error_texts_has_empty_values(self, api_client):
+        """Test error when texts has empty values"""
+        payload = {
+            "texts": [
+                "",
+                "",
+                ""
+            ],
+            "threshold": 0.3
+        }
+        response = api_client.post(f"{BASE_URL}/summarization", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert error["error"]["code"] == "INVALID_INPUT"