You can find the source code in the fastapi-jwt repository. This tutorial covered the process of securing a FastAPI application with JSON Web Tokens. You should now be able to use the protected route: Test the authentication by trying to visit a protected route without passing in a token:Ĭreate a new user and copy the generated access token:Īfter copying it, click on the authorize button in the top right corner and paste the token: post ( "/posts", dependencies =, tags = ) async def add_post ( post : PostSchema ) -> dict : post. Start by updating the imports by adding the JWTBearer class as well as Depends: To secure the routes, we'll leverage dependency injection via FastAPI's Depends. The method takes a jwtoken string which it then passes to the decodeJWT function and returns a boolean value based on the outcome from decodeJWT. The verify_jwt method verifies whether a token is valid. If no credentials were received, we raised an invalid authorization error.If a bearer token was passed, we verified that the JWT is valid.If the credential scheme isn't a bearer scheme, we raised an exception for an invalid token scheme.We then proceeded to check if the credentials passed in during the course of invoking the class are valid: In the _call_ method, we defined a variable called credentials of type HTTPAuthorizationCredentials, which is created when the JWTBearer class is invoked. ![]() ![]() In the _init_ method, we enabled automatic error reporting by setting the boolean auto_error to True. So, the JWTBearer class is a subclass of FastAPI's HTTPBearer class that will be used to persist authentication on our routes. credentials else : raise HTTPException ( status_code = 403, detail = "Invalid authorization code." ) def verify_jwt ( self, jwtoken : str ) -> bool : isTokenValid : bool = False try : payload = decodeJWT ( jwtoken ) except : payload = None if payload : isTokenValid = True return isTokenValid credentials ): raise HTTPException ( status_code = 403, detail = "Invalid token or expired token." ) return credentials. scheme = "Bearer" : raise HTTPException ( status_code = 403, detail = "Invalid authentication scheme." ) if not self. _call_ ( request ) if credentials : if not credentials. _init_ ( auto_error = auto_error ) async def _call_ ( self, request : Request ): credentials : HTTPAuthorizationCredentials = await super ( JWTBearer, self ). auth_handler import decodeJWT class JWTBearer ( HTTPBearer ): def _init_ ( self, auto_error : bool = True ): super ( JWTBearer, self ). ![]() # app/auth/auth_bearer.py from fastapi import Request, HTTPException from curity import HTTPBearer, HTTPAuthorizationCredentials from.
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