Maciej Pienczyn
9c296644f7
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- Replace plain textarea with Quill editor in compose and reply forms - Support Ctrl+V paste of screenshots directly into message body - Image toolbar button for file picker upload - New endpoint POST /api/messages/upload-image for inline images - Content sanitized via sanitize_html (bleach) with img tag support - Messages rendered as HTML (|safe) instead of plain text - Links clickable, images displayed inline in message body Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
124 lines
2.8 KiB
Python
124 lines
2.8 KiB
Python
"""
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Helper Functions
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================
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Common utility functions used across blueprints.
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"""
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import re
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import logging
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import bleach
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logger = logging.getLogger(__name__)
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# Allowed HTML tags and attributes for rich-text content (announcements, events, proceedings)
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_ALLOWED_TAGS = ['p', 'br', 'strong', 'em', 'b', 'i', 'a', 'ul', 'ol', 'li', 'h3', 'h4', 'blockquote', 'img']
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_ALLOWED_ATTRS = {'a': ['href', 'target', 'rel'], 'img': ['src', 'alt']}
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def sanitize_html(content):
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"""
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Sanitize HTML content to prevent stored XSS.
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Strips all tags except a safe whitelist.
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Args:
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content: HTML string to sanitize
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Returns:
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Sanitized HTML string
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"""
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if not content:
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return content
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return bleach.clean(content, tags=_ALLOWED_TAGS, attributes=_ALLOWED_ATTRS, strip=True)
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def sanitize_input(text, max_length=1000):
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"""
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Sanitize user input - remove potentially dangerous characters.
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Args:
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text: Input string to sanitize
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max_length: Maximum allowed length (default 1000)
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Returns:
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Sanitized string
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"""
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if not text:
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return ""
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# Remove null bytes
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text = text.replace('\x00', '')
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# Trim to max length
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text = text[:max_length]
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# Strip whitespace
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text = text.strip()
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return text
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def validate_email(email):
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"""
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Validate email format.
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Args:
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email: Email address to validate
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Returns:
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bool: True if valid, False otherwise
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"""
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if not email or len(email) > 255:
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return False
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# RFC 5322 compliant email regex (simplified)
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pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
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return re.match(pattern, email) is not None
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def validate_password(password):
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"""
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Validate password strength.
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Requirements:
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- Minimum 8 characters
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- At least one uppercase letter
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- At least one lowercase letter
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- At least one digit
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Args:
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password: Password to validate
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Returns:
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tuple: (is_valid: bool, message: str)
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"""
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if not password or len(password) < 8:
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return False, "Hasło musi mieć minimum 8 znaków"
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if not re.search(r'[A-Z]', password):
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return False, "Hasło musi zawierać przynajmniej jedną wielką literę"
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if not re.search(r'[a-z]', password):
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return False, "Hasło musi zawierać przynajmniej jedną małą literę"
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if not re.search(r'\d', password):
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return False, "Hasło musi zawierać przynajmniej jedną cyfrę"
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return True, "OK"
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def ensure_url(url):
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"""
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Ensure URL has http:// or https:// scheme.
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Args:
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url: URL string
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Returns:
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URL with https:// prefix if no scheme present
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"""
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if url and not url.startswith(('http://', 'https://')):
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return f'https://{url}'
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return url
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