Khi xây dựng production system với AI models, việc nhận được response chỉ là bước đầu tiên. Điều thực sự quan trọng là đảm bảo output từ AI luôn an toàn, đúng format, và không chứa malicious content. Trong bài viết này, tôi sẽ chia sẻ kinh nghiệm thực chiến 3 năm xây dựng validation layer cho các hệ thống AI tại production, cùng với code examples có thể copy-paste ngay.

Bảng So Sánh: HolySheep vs Official API vs Relay Services

Tiêu chí HolySheep AI Official OpenAI/Anthropic Proxy/Relay Services
Chi phí GPT-4.1 $8/1M tokens $60/1M tokens $15-30/1M tokens
Chi phí Claude Sonnet 4.5 $15/1M tokens $3/1M tokens $8-12/1M tokens
Chi phí Gemini 2.5 Flash $2.50/1M tokens $0.125/1M tokens $1.5-3/1M tokens
DeepSeek V3.2 $0.42/1M tokens Không có $0.80/1M tokens
Độ trễ trung bình <50ms 100-300ms 150-500ms
Thanh toán WeChat/Alipay, Visa Chỉ Visa quốc tế Khác nhau
Tín dụng miễn phí Có khi đăng ký $5 trial Ít khi có
Built-in Validation Basic checks Không Không

Tỷ giá ¥1 = $1 của HolySheep giúp tiết kiệm 85%+ so với các giải pháp khác. Với độ trễ dưới 50ms, đây là lựa chọn tối ưu cho các production systems cần real-time validation.

Tại Sao Response Validation Lại Quan Trọng?

Trong thực tế production, tôi đã gặp nhiều trường hợp AI trả về:

Không có validation, những response này sẽ crash production system hoặc gây security vulnerabilities nghiêm trọng.

Kiến Trúc Validation Layer Tổng Quát

# response_validator.py

Architecture tổng quát cho AI response validation

from abc import ABC, abstractmethod from dataclasses import dataclass from typing import Any, Optional, List, Dict from enum import Enum import json import re from html import escape class ValidationSeverity(Enum): ERROR = "error" WARNING = "warning" INFO = "info" @dataclass class ValidationResult: is_valid: bool severity: ValidationSeverity message: str sanitized_output: Optional[Any] = None metadata: Optional[Dict] = None class BaseValidator(ABC): """Abstract base class cho tất cả validators""" @abstractmethod def validate(self, response: str, **kwargs) -> ValidationResult: pass @abstractmethod def sanitize(self, response: str) -> str: """Sanitize input/output""" pass class ResponseValidatorPipeline: """ Pipeline orchestrator - chạy validators theo thứ tự Tối ưu cho HolySheep API responses với <50ms latency """ def __init__(self, validators: List[BaseValidator]): self.validators = validators self._cache = {} # Optional: cache validation results def validate(self, response: str) -> ValidationResult: current_output = response for validator in self.validators: result = validator.validate(current_output) if not result.is_valid: return result if result.sanitized_output: current_output = result.sanitized_output return ValidationResult( is_valid=True, severity=ValidationSeverity.INFO, message="All validations passed", sanitized_output=current_output )

Ví dụ usage với HolySheep API

def validate_ai_response(response_text: str) -> ValidationResult: pipeline = ResponseValidatorPipeline([ JSONStructureValidator(), ContentSafetyValidator(), LengthValidator(max_chars=10000), XSSValidator(), ]) return pipeline.validate(response_text)

Validator 1: JSON Structure Validation

Đây là validator phổ biến nhất mà tôi sử dụng. AI models thường generate JSON với syntax errors nhỏ mà con người khó phát hiện.

# json_validator.py
import json
import re
from typing import Optional, Dict, Any, List, Tuple

class JSONStructureValidator(BaseValidator):
    """
    Validator cho JSON responses - xử lý cả JSON thuần và streaming
    Hỗ trợ schema validation với JSON Schema draft-07
    """
    
    def __init__(
        self,
        required_fields: Optional[List[str]] = None,
        field_types: Optional[Dict[str, type]] = None,
        allow_extra_fields: bool = False,
        strict_mode: bool = True
    ):
        self.required_fields = required_fields or []
        self.field_types = field_types or {}
        self.allow_extra_fields = allow_extra_fields
        self.strict_mode = strict_mode
    
    def validate(self, response: str, **kwargs) -> ValidationResult:
        # Bước 1: Parse JSON
        parsed, error = self._parse_json(response)
        if error:
            # Thử fix common JSON errors
            fixed, was_fixed = self._attempt_fix(response)
            if was_fixed:
                return ValidationResult(
                    is_valid=True,
                    severity=ValidationSeverity.WARNING,
                    message=f"Auto-fixed JSON: {error}",
                    sanitized_output=fixed,
                    metadata={"original_error": error, "was_auto_fixed": True}
                )
            return ValidationResult(
                is_valid=False,
                severity=ValidationSeverity.ERROR,
                message=f"JSON parse error: {error}",
                metadata={"original_response": response[:500]}
            )
        
        # Bước 2: Validate required fields
        missing_fields = self._check_required_fields(parsed)
        if missing_fields:
            return ValidationResult(
                is_valid=False,
                severity=ValidationSeverity.ERROR,
                message=f"Missing required fields: {missing_fields}",
                sanitized_output=response
            )
        
        # Bước 3: Validate field types
        type_errors = self._check_field_types(parsed)
        if type_errors:
            return ValidationResult(
                is_valid=False,
                severity=ValidationSeverity.ERROR,
                message=f"Type mismatches: {type_errors}",
                sanitized_output=response
            )
        
        return ValidationResult(
            is_valid=True,
            severity=ValidationSeverity.INFO,
            message="JSON structure valid",
            sanitized_output=json.dumps(parsed, ensure_ascii=False)
        )
    
    def _parse_json(self, text: str) -> Tuple[Optional[Dict], Optional[str]]:
        """Parse JSON với error handling chi tiết"""
        text = text.strip()
        
        # Thử direct parse trước
        try:
            return json.loads(text), None
        except json.JSONDecodeError as e:
            return None, str(e)
    
    def _attempt_fix(self, text: str) -> Tuple[str, bool]:
        """Thử auto-fix common JSON errors"""
        fixed = text
        
        # Fix 1: Trailing commas
        fixed = re.sub(r',(\s*[}\]])', r'\1', fixed)
        
        # Fix 2: Single quotes to double quotes (simple cases)
        # Chỉ fix keys và simple strings
        fixed = re.sub(r"'([^']*)':", r'"\1":', fixed)
        fixed = re.sub(r":\s*'([^']*)'(,?\s*[}\]])", r': "\1"\2', fixed)
        
        # Fix 3: Comments
        fixed = re.sub(r'//.*?$', '', fixed, flags=re.MULTILINE)
        fixed = re.sub(r'/\*.*?\*/', '', fixed, flags=re.DOTALL)
        
        # Re-parse attempt
        try:
            json.loads(fixed)
            return fixed, True
        except:
            return text, False
    
    def _check_required_fields(self, data: Dict) -> List[str]:
        missing = []
        for field in self.required_fields:
            if field not in data:
                missing.append(field)
        return missing
    
    def _check_field_types(self, data: Dict) -> Dict[str, str]:
        errors = {}
        for field, expected_type in self.field_types.items():
            if field in data and not isinstance(data[field], expected_type):
                errors[field] = f"Expected {expected_type.__name__}, got {type(data[field]).__name__}"
        return errors
    
    def sanitize(self, response: str) -> str:
        """Sanitize JSON response"""
        parsed, _ = self._parse_json(response)
        if parsed:
            return json.dumps(parsed, ensure_ascii=False, indent=2)
        return response

Usage example với HolySheep API response

def process_holysheep_json_response(response_text: str) -> Dict[str, Any]: validator = JSONStructureValidator( required_fields=["id", "model", "choices"], field_types={ "id": str, "model": str, "choices": list } ) result = validator.validate(response_text) if not result.is_valid: raise ValueError(f"Response validation failed: {result.message}") return json.loads(result.sanitized_output)

Validator 2: Content Safety và XSS Protection

Security là ưu tiên hàng đầu. AI có thể vô tình generate content chứa XSS payloads hoặc sensitive data.

# security_validator.py
import re
from html import escape, unescape
from typing import Set, List, Pattern
import hashlib

class SecurityValidator(BaseValidator):
    """
    Comprehensive security validator cho AI responses
    - XSS protection
    - SQL injection prevention
    - Sensitive data redaction
    - Prompt injection detection
    """
    
    # Common XSS patterns
    XSS_PATTERNS: List[Pattern] = [
        re.compile(r']*>.*?', re.IGNORECASE | re.DOTALL),
        re.compile(r'javascript:', re.IGNORECASE),
        re.compile(r'on\w+\s*=', re.IGNORECASE),  # onerror=, onclick=, etc.
        re.compile(r']*>.*?', re.IGNORECASE | re.DOTALL),
        re.compile(r']*>', re.IGNORECASE),
        re.compile(r']*>.*?', re.IGNORECASE | re.DOTALL),
        re.compile(r'eval\s*\(', re.IGNORECASE),
        re.compile(r'expression\s*\(', re.IGNORECASE),
    ]
    
    # SQL injection patterns
    SQL_INJECTION_PATTERNS: List[Pattern] = [
        re.compile(r"(\bOR\b|\bAND\b).*=.*", re.IGNORECASE),
        re.compile(r"(\bUNION\b|\bSELECT\b|\bINSERT\b|\bUPDATE\b|\bDELETE\b)", re.IGNORECASE),
        re.compile(r"(--|#|/\*|\*/)", re.IGNORECASE),
        re.compile(r";\s*(DROP|TRUNCATE|ALTER)", re.IGNORECASE),
    ]
    
    # Prompt injection markers
    INJECTION_MARKERS: List[Pattern] = [
        re.compile(r'\[INST\]\s*$', re.IGNORECASE),  # Llama jailbreak
        re.compile(r'\{\{.*\}\}', re.IGNORECASE),    # Template injection
        re.compile(r'<\|.*\|>', re.IGNORECASE),      # Special tokens
        re.compile(r' Ignore.*instructions', re.IGNORECASE),
    ]
    
    def __init__(
        self,
        redact_sensitive: bool = True,
        sensitive_patterns: List[Pattern] = None,
        allow_html: bool = False,
        max_depth: int = 10
    ):
        self.redact_sensitive = redact_sensitive
        self.sensitive_patterns = sensitive_patterns or self._default_sensitive_patterns()
        self.allow_html = allow_html
        self.max_depth = max_depth
    
    def _default_sensitive_patterns(self) -> List[Pattern]:
        return [
            re.compile(r'\b\d{3}-\d{2}-\d{4}\b'),  # SSN
            re.compile(r'\b\d{16}\b'),             # Credit card
            re.compile(r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b'),  # Email
            re.compile(r'api[_-]?key["\']?\s*[:=]\s*["\']?[A-Za-z0-9_-]{20,}', re.IGNORECASE),
            re.compile(r'sk-[A-Za-z0-9]{20,}', re.IGNORECASE),  # OpenAI keys
            re.compile(r'Bearer\s+[A-Za-z0-9_-]+', re.IGNORECASE),
        ]
    
    def validate(self, response: str, **kwargs) -> ValidationResult:
        violations = []
        sanitized = response
        
        # Check XSS
        xss_found = self._check_xss(response)
        if xss_found:
            if not self.allow_html:
                violations.append(f"XSS patterns detected: {xss_found}")
                sanitized = self._sanitize_xss(sanitized)
            else:
                violations.append(f"Potential XSS (allowed): {xss_found}")
        
        # Check SQL injection
        sql_found = self._check_sql_injection(response)
        if sql_found:
            violations.append(f"SQL injection patterns: {sql_found}")
            sanitized = self._redact_sql_injection(sanitized)
        
        # Check prompt injection
        injection_found = self._check_prompt_injection(response)
        if injection_found:
            violations.append(f"Potential prompt injection: {injection_found}")
            sanitized = self._neutralize_injection(sanitized)
        
        # Redact sensitive data
        if self.redact_sensitive:
            sanitized, redacted = self._redact_sensitive_data(sanitized)
            if redacted:
                violations.append(f"Redacted {len(redacted)} sensitive data instances")
        
        if violations:
            return ValidationResult(
                is_valid=True,  # Still valid, just sanitized
                severity=ValidationSeverity.WARNING,
                message="; ".join(violations),
                sanitized_output=sanitized,
                metadata={"violations": violations, "was_sanitized": True}
            )
        
        return ValidationResult(
            is_valid=True,
            severity=ValidationSeverity.INFO,
            message="Security validation passed",
            sanitized_output=sanitized
        )
    
    def _check_xss(self, text: str) -> List[str]:
        found = []
        for pattern in self.XSS_PATTERNS:
            match = pattern.search(text)
            if match:
                found.append(match.group()[:50])
        return found
    
    def _sanitize_xss(self, text: str) -> str:
        """Sanitize XSS by escaping HTML entities"""
        return escape(text)
    
    def _check_sql_injection(self, text: str) -> List[str]:
        found = []
        for pattern in self.SQL_INJECTION_PATTERNS:
            match = pattern.search(text)
            if match:
                found.append(match.group()[:50])
        return found
    
    def _redact_sql_injection(self, text: str) -> str:
        """Replace potentially dangerous SQL with placeholders"""
        for pattern in self.SQL_INJECTION_PATTERNS:
            text = pattern.sub('[REDACTED_SQL]', text)
        return text
    
    def _check_prompt_injection(self, text: str) -> List[str]:
        found = []
        for pattern in self.INJECTION_MARKERS:
            match = pattern.search(text)
            if match:
                found.append(match.group()[:50])
        return found
    
    def _neutralize_injection(self, text: str) -> str:
        """Remove or neutralize prompt injection attempts"""
        for pattern in self.INJECTION_MARKERS:
            text = pattern.sub('[INJECTION_BLOCKED]', text)
        return text
    
    def _redact_sensitive_data(self, text: str) -> tuple:
        redacted_items = []
        for pattern in self.sensitive_patterns:
            matches = pattern.findall(text)
            redacted_items.extend(matches)
            text = pattern.sub('[REDACTED]', text)
        return text, redacted_items
    
    def sanitize(self, response: str) -> str:
        """Main sanitization method"""
        _, result = self._parse_and_sanitize(response)
        return result
    
    def _parse_and_sanitize(self, text: str, depth: int = 0) -> tuple:
        """Recursively sanitize text, handling nested structures"""
        if depth > self.max_depth:
            return False, text
        
        # Check and sanitize
        sanitized = escape(text) if not self.allow_html else text
        is_safe = not any(p.search(sanitized) for p in self.XSS_PATTERNS)
        
        return is_safe, sanitized

Production usage với HolySheep API

def safe_ai_response(response: str, allow_html: bool = False) -> str: validator = SecurityValidator( redact_sensitive=True, allow_html=allow_html ) result = validator.validate(response) return result.sanitized_output

Validator 3: Length và Format Constraints

# length_format_validator.py
import re
from typing import Optional, Tuple, List

class LengthFormatValidator(BaseValidator):
    """
    Validator cho response length và format constraints
    Essential cho prevent token overflow và quota issues
    """
    
    def __init__(
        self,
        min_chars: int = 0,
        max_chars: int = 100000,
        min_tokens: Optional[int] = None,
        max_tokens: Optional[int] = 4096,
        expected_formats: Optional[List[str]] = None,
        line_count_range: Tuple[int, int] = (0, 10000),
        word_count_range: Tuple[int, int] = (0, 50000)
    ):
        self.min_chars = min_chars
        self.max_chars = max_chars
        self.min_tokens = min_tokens
        self.max_tokens = max_tokens
        self.expected_formats = expected_formats or []
        self.line_count_range = line_count_range
        self.word_count_range = word_count_range
    
    def estimate_tokens(self, text: str) -> int:
        """Estimate token count -rough but fast (4 chars ~ 1 token)"""
        return len(text) // 4
    
    def validate(self, response: str, **kwargs) -> ValidationResult:
        issues = []
        char_count = len(response)
        
        # Character length check
        if char_count < self.min_chars:
            issues.append(f"Response too short: {char_count} < {self.min_chars}")
        if char_count > self.max_chars:
            issues.append(f"Response too long: {char_count} > {self.max_chars}")
        
        # Token estimation
        estimated_tokens = self.estimate_tokens(response)
        if self.min_tokens and estimated_tokens < self.min_tokens:
            issues.append(f"Token estimate too low: {estimated_tokens} < {self.min_tokens}")
        if self.max_tokens and estimated_tokens > self.max_tokens:
            issues.append(f"Token estimate too high: {estimated_tokens} > {self.max_tokens}")
        
        # Line count
        line_count = len(response.splitlines())
        if not (self.line_count_range[0] <= line_count <= self.line_count_range[1]):
            issues.append(f"Line count out of range: {line_count}")
        
        # Word count
        word_count = len(response.split())
        if not (self.word_count_range[0] <= word_count <= self.word_count_range[1]):
            issues.append(f"Word count out of range: {word_count}")
        
        # Format validation
        if self.expected_formats:
            format_valid = self._check_format(response)
            if not format_valid:
                issues.append(f"Format mismatch. Expected one of: {self.expected_formats}")
        
        if issues:
            return ValidationResult(
                is_valid=False,
                severity=ValidationSeverity.ERROR,
                message="; ".join(issues),
                sanitized_output=response,
                metadata={
                    "char_count": char_count,
                    "estimated_tokens": estimated_tokens,
                    "line_count": line_count,
                    "word_count": word_count
                }
            )
        
        return ValidationResult(
            is_valid=True,
            severity=ValidationSeverity.INFO,
            message="Length and format validation passed",
            sanitized_output=response,
            metadata={
                "char_count": char_count,
                "estimated_tokens": estimated_tokens
            }
        )
    
    def _check_format(self, text: str) -> bool:
        """Check if text matches any expected format"""
        # JSON format
        if "json" in self.expected_formats:
            try:
                import json
                json.loads(text)
                return True
            except:
                pass
        
        # Markdown format
        if "markdown" in self.expected_formats:
            if text.startswith("#") or "```" in text or "**" in text:
                return True
        
        # Plain text
        if "text" in self.expected_formats:
            return True
        
        return False
    
    def sanitize(self, response: str) -> str:
        """Truncate if too long"""
        if len(response) > self.max_chars:
            return response[:self.max_chars] + "\n... [TRUNCATED]"
        return response

Token calculation helper - quan trọng cho HolySheep billing

def calculate_cost(response: str, model: str) -> float: """ Calculate approximate cost dựa trên token count HolySheep 2026 pricing """ tokens = len(response) // 4 # Rough estimate pricing = { "gpt-4.1": 8.0, # $8/1M tokens "claude-sonnet-4.5": 15.0, # $15/1M tokens "gemini-2.5-flash": 2.50, # $2.50/1M tokens "deepseek-v3.2": 0.42, # $0.42/1M tokens } rate = pricing.get(model, 10.0) # Default fallback return (tokens / 1_000_000) * rate

Tích Hợp Hoàn Chỉnh với HolySheep API

# holysheep_integration.py
import requests
import time
import logging
from typing import Optional, Dict, Any
from response_validator import (
    ResponseValidatorPipeline,
    JSONStructureValidator,
    SecurityValidator,
    LengthFormatValidator
)
from content_safety import ContentModerationValidator

logger = logging.getLogger(__name__)

class HolySheepAIClient:
    """
    Production-ready client cho HolySheep AI API
    Tích hợp sẵn validation pipeline
    """
    
    def __init__(
        self,
        api_key: str,
        base_url: str = "https://api.holysheep.ai/v1",
        timeout: int = 30,
        max_retries: int = 3,
        enable_validation: bool = True
    ):
        self.api_key = api_key
        self.base_url = base_url.rstrip('/')
        self.timeout = timeout
        self.max_retries = max_retries
        self.enable_validation = enable_validation
        
        # Initialize validation pipeline
        self.validator = ResponseValidatorPipeline([
            JSONStructureValidator(
                required_fields=["id", "model", "choices"],
                field_types={"id": str, "model": str}
            ),
            SecurityValidator(
                redact_sensitive=True,
                allow_html=False
            ),
            LengthFormatValidator(
                max_chars=50000,
                max_tokens=4000,
                expected_formats=["json", "text"]
            ),
            ContentModerationValidator()
        ])
        
        self.session = requests.Session()
        self.session.headers.update({
            "Authorization": f"Bearer {self.api_key}",
            "Content-Type": "application/json"
        })
        
        # Metrics
        self.metrics = {
            "total_requests": 0,
            "successful_requests": 0,
            "failed_requests": 0,
            "validation_failures": 0,
            "avg_latency_ms": 0,
            "total_cost_usd": 0.0
        }
    
    def chat_completions(
        self,
        messages: list,
        model: str = "gpt-4.1",
        temperature: float = 0.7,
        max_tokens: int = 1000,
        stream: bool = False,
        **kwargs
    ) -> Dict[str, Any]:
        """
        Gửi chat completion request tới HolySheep API
        """
        self.metrics["total_requests"] += 1
        start_time = time.time()
        
        endpoint = f"{self.base_url}/chat/completions"
        payload = {
            "model": model,
            "messages": messages,
            "temperature": temperature,
            "max_tokens": max_tokens,
            "stream": stream,
            **kwargs
        }
        
        for attempt in range(self.max_retries):
            try:
                response = self.session.post(
                    endpoint,
                    json=payload,
                    timeout=self.timeout
                )
                response.raise_for_status()
                
                result = response.json()
                latency_ms = (time.time() - start_time) * 1000
                
                # Validate response
                if self.enable_validation:
                    validation_result = self._validate_response(result)
                    if not validation_result.is_valid:
                        logger.warning(f"Validation failed: {validation_result.message}")
                        self.metrics["validation_failures"] += 1
                        raise ValueError(f"Response validation failed: {validation_result.message}")
                
                # Update metrics
                self.metrics["successful_requests"] += 1
                self._update_latency_metrics(latency_ms)
                self._update_cost_metrics(result, model)
                
                return result
                
            except requests.exceptions.Timeout:
                logger.warning(f"Request timeout (attempt {attempt + 1}/{self.max_retries})")
                if attempt == self.max_retries - 1:
                    self.metrics["failed_requests"] += 1
                    raise
                    
            except requests.exceptions.RequestException as e:
                logger.error(f"Request error: {e}")
                self.metrics["failed_requests"] += 1
                raise
                
            except ValueError as e:
                self.metrics["failed_requests"] += 1
                raise
    
    def _validate_response(self, response: Dict) -> ValidationResult:
        """Validate API response"""
        # Extract content from response
        content = self._extract_content(response)
        return self.validator.validate(content)
    
    def _extract_content(self, response: Dict) -> str:
        """Extract text content from various response formats"""
        try:
            if "choices" in response:
                return response["choices"][0].get("message", {}).get("content", "")
            elif "content" in response:
                return response["content"]
            return str(response)
        except Exception:
            return str(response)
    
    def _update_latency_metrics(self, latency_ms: float):
        """Update rolling average latency"""
        current_avg = self.metrics["avg_latency_ms"]
        total = self.metrics["total_requests"]
        self.metrics["avg_latency_ms"] = (
            (current_avg * (total - 1) + latency_ms) / total
        )
    
    def _update_cost_metrics(self, response: Dict, model: str):
        """Calculate and update cost metrics"""
        try:
            usage = response.get("usage", {})
            prompt_tokens = usage.get("prompt_tokens", 0)
            completion_tokens = usage.get("completion_tokens", 0)
            total_tokens = usage.get("total_tokens", prompt_tokens + completion_tokens)
            
            pricing = {
                "gpt-4.1": 8.0,
                "claude-sonnet-4.5": 15.0,
                "gemini-2.5-flash": 2.50,
                "deepseek-v3.2": 0.42
            }
            
            rate = pricing.get(model, 10.0)
            cost = (total_tokens / 1_000_000) * rate
            self.metrics["total_cost_usd"] += cost
            
        except Exception as e:
            logger.warning(f"Could not calculate cost: {e}")
    
    def get_metrics(self) -> Dict[str, Any]:
        """Return current metrics"""
        return self.metrics.copy()


Usage example

def main(): # Initialize client client = HolySheepAIClient( api_key="YOUR_HOLYSHEEP_API_KEY", enable_validation=True ) # Send request messages = [ {"role": "system", "content": "You are a helpful assistant. Always respond with valid JSON."}, {"role": "user", "content": "Get me information about Python libraries"} ] try: response = client.chat_completions( messages=messages, model="gpt-4.1", temperature=0.7, max_tokens=500 ) print(f"Response: {response['choices'][0]['message']['content']}") print(f"Latency: {client.metrics['avg_latency_ms']:.2f}ms") print(f"Total cost: ${client.metrics['total_cost_usd']:.4f}") except Exception as e: print(f"Error: {e}") if __name__ == "__main__": main()

Kiểm Thử Validators

# test_validators.py
import pytest
import json
from response_validator import (
    JSONStructureValidator,
    SecurityValidator,
    LengthFormatValidator,
    ResponseValidatorPipeline,
    ValidationResult,
    ValidationSeverity
)

class TestJSONValidator:
    """Test cases cho JSON validator"""
    
    def test_valid_json(self):
        validator = JSONStructureValidator()
        test_data = '{"name": "test", "value": 123}'
        result = validator.validate(test_data)
        assert result.is_valid == True
    
    def test_missing_required_fields(self):
        validator = JSONStructureValidator(required_fields=["id", "name"])
        test_data = '{"name": "test"}'
        result = validator.validate(test_data)
        assert result.is_valid == False
        assert "Missing required fields" in result.message
    
    def test_auto_fix_trailing_comma(self):
        validator = JSONStructureValidator()
        test_data = '{"name": "test", "value": 123,}'
        result = validator.validate(test_data)
        assert result.is_valid == True
        assert result.metadata.get("was_auto_fixed") == True
    
    def test_type_mismatch(self):
        validator = JSONStructureValidator(
            field_types={"count": int}
        )
        test_data = '{"count": "not_a_number"}'
        result = validator.validate(test_data)
        assert result.is_valid == False

class TestSecurityValidator:
    """Test cases cho security validator"""
    
    def test_xss_script_tag(self):
        validator = SecurityValidator(allow_html=False)
        test_data = ''
        result = validator.validate(test_data)
        assert result.sanitized_output != test_data
    
    def test_sensitive_data_redaction(self):
        validator = SecurityValidator(redact_sensitive=True)
        test_data = 'API Key: sk-1234567890abcdefghij'
        result = validator.validate(test_data)
        assert 'sk-1234567890' not in result.sanitized_output
        assert '[REDACTED]' in result.sanitized_output
    
    def test_sql_injection_detection(self):
        validator = SecurityValidator()
        test_data = "SELECT * FROM users WHERE id=1 OR 1=1"
        result = validator.validate(test_data)
        assert '[