flask-session-captcha 1.0.0

Captcha implementation for flask and flask-session.

Copyright (c) 2017 Joakim Uddholm

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of this software and associated documentation files (the "Software"), to deal
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Description: # flask-session-captcha
[](https://travis-ci.org/Tethik/another-flask-captcha)
[](https://codecov.io/gh/Tethik/another-flask-captcha)

A captcha implemention for flask using [flask-session](https://github.com/fengsp/flask-session) and [captcha](https://pypi.python.org/pypi/captcha/0.2.3) packages. Each captcha challenge answer is saved in the server side session of the challenged client.

For now it supports only simple numeric image captchas, but more could easily be added from the underlying [captcha package](https://pypi.python.org/pypi/captcha/0.2.3).

## Requirements
* Flask
* Flask-Session
* ... and different packages depending on which SESSION_TYPE you use. E.g. sqlalchemy requires flask-sqlalchemy.
* captcha

## Usage
```python
import uuid
from flask import Flask, request, render_template
from flask_session import Session
from flask_session_captcha import FlaskSessionCaptcha

app = Flask(__name__)
app.config["SECRET_KEY"] = uuid.uuid4()
app.config['CAPTCHA_ENABLE'] = True
app.config['CAPTCHA_NUMERIC_DIGITS'] = 5
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite://'
app.config['SESSION_TYPE'] = 'sqlalchemy'
Session(app)
captcha = FlaskSessionCaptcha(app)

@app.route('/')
def some_route():
if request.method == "POST":
if captcha.validate(): # This returns True if request.form["captcha"] has the right answer.
return "success"
else:
return "fail"

return render_template("form.html")
```

Template can look as follows. `captcha.validate()` will be default try to validate against a form input with name "captcha".

```html
<form method="POST">
{{ captcha() }} <!-- This renders an <img> tag with the captcha img. -->
<input type="text" name="captcha">
<input type="submit">
</form>
```

Platform: UNKNOWN
Classifier: Development Status :: 4 - Beta
Classifier: Environment :: Web Environment
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3.3
Classifier: Programming Language :: Python :: 3.4
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Topic :: Security