flask-guard

FlaskRequestGuard

Flask Request Guard is a Python library for validating incoming HTTP requests in Flask web applications. It provides a simple yet flexible way to define request rules and enforce them automatically on incoming requests, ensuring that only requests that meet the specified requirements are allowed to proceed.

Installation

Use the package manager pip to intall flask-request-gaurd.

pip install flask-guard

Create the keys

from FlaskGuard import RequestParameter

# Creates a key that has the name "name" and type str with a minimum length of 0 and 
# a maximum length of 10
name_key =  RequestParameter("name", str, 0, 10)

# Creates a key that has the name "range" and type int with a minimum value of -10 and
#  a maximum value of 10
range_key = RequestParameter("range", int, -10, 10)

Create the validation function

from FlaskGuard import  FlaskGuard

# Init FlaskRequestGuard
guard = FlaskRequestGuard("myapp")

# Keys from the code snippet above
required_keys = [range_key, name_key] 

# Returns a function that is used to check a request
validate_user_request = guard.create_validate_function(required_keys)

Check request

request = {"name": "erik", "age": 23, "range": 2}
# Returns (True, {"error_messages": []}) 
is_valid, error_messages = validate_user_request(request)

request = {"name": "eeeeeeeeeee", "age": 23, "range": 2}
# Returns (False, {"error_messages": ["The 'name' field must be 10 size or less,
#  and at least 0 size or more, but is actually 11 characters long."]})
is_valid, error_messages = validate_user_request(request)


request = {"age": 23, "range": 2}
# Returns False, {"error_messages": ["Missing name field in request body."]}
is_valid, error_messages = validate_user_request(request)

For an example where it's used with Flask, check out FlaskGuard-example repo.

Run tests

Run this commad in FlaskGuard directory to run the tests

python -m unittest discover tests

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT