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function save_session_settings

Maturity: 45

Flask API endpoint that saves user-provided settings for the current session by retrieving the session ID from Flask's session object and updating the session settings in the backend.

File:
/tf/active/vicechatdev/docchat/app.py
Lines:
937 - 945
Complexity:
simple

Purpose

This endpoint handles POST requests to persist session-specific configuration settings. It validates that a session exists, extracts settings from the request JSON payload, and delegates to an update function to store these settings. This is typically used in web applications where users can customize their experience (e.g., preferences, UI settings, feature flags) on a per-session basis.

Source Code

def save_session_settings():
    """Save settings for current session"""
    session_id = session.get('session_id')
    if not session_id:
        return jsonify({'error': 'No session'}), 400
    
    settings = request.json
    update_session_settings(session_id, settings)
    return jsonify({'success': True})

Return Value

Returns a Flask JSON response. On success: {'success': True} with HTTP 200 status. On failure (no session): {'error': 'No session'} with HTTP 400 status. The response is a tuple containing the JSON object and HTTP status code.

Dependencies

  • flask
  • config
  • uuid
  • pathlib
  • threading
  • werkzeug
  • logging
  • datetime
  • json
  • os
  • time
  • functools
  • docx
  • reportlab
  • io
  • traceback

Required Imports

from flask import Flask
from flask import request
from flask import jsonify
from flask import session

Usage Example

# Assuming Flask app is set up with session management
# Client-side JavaScript example:
# fetch('/api/session/settings', {
#   method: 'POST',
#   headers: {'Content-Type': 'application/json'},
#   body: JSON.stringify({theme: 'dark', language: 'en', notifications: true})
# });

# Server-side test example:
from flask import Flask, session
import json

app = Flask(__name__)
app.secret_key = 'your-secret-key'

# Mock the update_session_settings function
def update_session_settings(session_id, settings):
    # Store settings in database or cache
    print(f"Updating session {session_id} with settings: {settings}")

with app.test_client() as client:
    with client.session_transaction() as sess:
        sess['session_id'] = 'test-session-123'
    
    response = client.post('/api/session/settings',
                          data=json.dumps({'theme': 'dark', 'language': 'en'}),
                          content_type='application/json')
    print(response.json)  # {'success': True}

Best Practices

  • Ensure Flask's secret_key is set to a secure random value in production for session security
  • The update_session_settings function should handle database/storage errors gracefully
  • Consider adding input validation on the settings JSON to prevent malicious data
  • Add authentication/authorization checks before allowing settings updates
  • Consider rate limiting this endpoint to prevent abuse
  • Log settings changes for audit purposes
  • Validate that session_id exists in your session store before updating
  • Consider adding schema validation for the settings object to ensure expected structure
  • Handle potential race conditions if multiple requests update settings simultaneously
  • Return more specific error messages for debugging (in development mode only)

Tags

flask api-endpoint session-management settings configuration web-api POST-request user-preferences state-management REST-api

Similar Components

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