What Is The Authorizer App On My Mac
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The System Information app provides detailed specifications and other information about your Mac hardware and software, including your network and external devices. In some versions of OS X, this app is called System Profiler.
Choose Apple menu > About This Mac. This opens an overview of your Mac, including your Mac model, processor, memory, serial number, and version of macOS. To see the greater detail provided by the System Information app, click the System Report button.
To open System Information directly, press and hold the Option key and choose Apple menu > System Information. You can also use Spotlight to find System Information, or open it from the Utilities folder of your Applications folder.
System Information opens to a system report for your Mac:
Select items in the sidebar to see information about each item. For example:
- The Hardware section shows your Mac serial number
- The Memory section shows how much RAM is installed in each internal memory slot.
- The Software section shows which startup disk (boot volume) your Mac is using.
- The Network section shows details such as your IP address, the connections allowed by your macOS firewall, the signal strength of nearby Wi-Fi networks, and more.
Learn more
- To have System Information read your serial number aloud, choose File > Speak Serial Number.
- To save a copy of your system report, choose File > Save.
- To learn more about System Information, choose Help > System Information Help.
If you had noticed from the previous steps, there was a username fieldfor all of the Todos, but the username was always set to default.This step will be utilizing the username field by exposing the notionof users and authorization in the Todo application. For this section, we willbe doing the following to add authorization and users to the application:
For authorization, the application is going to be relying on JWT. To dependon JWT, in the Chalice application PyJWT needs to be installed and addedto our requirements.txt file.
Instructions¶
Add
PyJWTto yourrequirements.txtfile:Make sure it is now installed in your virtualenv:
Verification¶
To ensure that it was installed, open the Python REPL and try to importthe PyJWT library:
In order to add authentication to your Chalice application we have provided a fewfiles that help with some of the low-level details. We have added an auth.py fileto chalicelib which abstracts away some of the details of handling JWT tokens. Wehave also added a users.py script which is a command line utility for creating andmanaging a user table.
Instructions¶
1) Copy in the chalice-workshop/code/todo-app/part1/04-add-auth/chalicelib/auth.pyfile:
2) Copy over the chalice-workshop/code/todo-app/part1/04-add-auth/users.py script forcreating users:
Verification¶
From within the mytodo directory of your Todo Chalice application, thestructure should be the following:
Using the createtable.py script, this will create another DynamoDB tablefor storing users to use in the Chalice application.
Instructions¶
Run the
createtable.pyscript to create the DynamoDB table:
Verification¶
Check that the return code of the command is 0:
Also cat the .chalice/config.json to make sure the USERS_TABLE_NAMEshows up as an environment variable:
Using the users.py script, create a new user in your users database touse with your chalice application.
Instructions¶
Run the
users.pyscript with the-cargument to create a user. Youwill be prompted for a username and a password:
Verification¶
Using the users.py script, make sure that the user is listed in yourdatabase:
Also make sure that the password is correct by testing the username andpassword with the users.py script:
You can also test an incorrect password. You should see this output:
Now that we have created a DynamoDB user table, we will create a convenience functionfor loading it.
Instructions¶
Add a new variable
_USER_DBin yourapp.pyfile with a value of None:
Create a function for fetching our current database table for users. Similar to thefunction that gets the app table. Add this function to your
app.pyfile:
We will now create a login route where users can trade their username/password for aJWT token.
Instructions¶
Define a new Chalice route
/loginthat accepts the POST method and grabs theusernameandpasswordfrom the request, and forwards it along to a helperfunction in theauthcode you copied in earlier which will trade those for aJWT token.
Notice the above code snippit uses the
authfile that we copied into ourchalicelib directory at the beginning of this step. Add the followingimport statement to the top ofapp.pyso we can use it:
Verification¶
Start up a local server using
chalicelocal.Using the username and password generated previously, run
chalicelocaland make an HTTPPOSTrequest to the/loginURI:
This should return a JWT to use as an Authorization header for that user.
To add authorization to our app we will start by defining an authorizer andattaching it to one of our routes.
Instructions¶
Create an authorizer function that checks the validity of a JWT token using theexisting code in the
auth.pyfile we copied earlier. If the token is valid(didn’t throw an error) we will return a policy that allows access to all of ourroutes, and sets theprincipal_idto the username in the JWT token.Once we have defined the authorizer, we will attach it to the
get_todosroute.
Also make sure to import the AuthResponse class at the top of the app.py file:
Verification¶
Start the local dev server
chalicelocalTry to get the todo, the request should be rejected without authorization:
Try the same call again but with your authorization token passed in the
Authorizationheader:
What Is The Authorizer App On My Macbook Air

Now attach the authorizer to all the other routes except the login route.
Instructions¶
Attach the
jwt_authauthorizer to theadd_new_todoroute.Attach the
jwt_authauthorizer to theget_todoroute.Attach the
jwt_authauthorizer to thedelete_todoroute.Attach the
jwt_authauthorizer to theupdate_todoroute.
Verification¶
Start up the local dev server
chalicelocalTry each route without an authorization token. You should get a
401Unauthorized response:
Now try to create, get, update, and delete a todo from your application byusing the
Authorizationheader in all your requests:
Now that we have authorizers hooked up to all our routes we can use thatinstead of relying on the default user of default.
Instructions¶
First create a function named
get_authorized_usernamethat will be usedto convert the information we have in ourcurrent_requestinto ausername.
Now we need to update each function that interacts with our database tocalculate the
usernameand pass it to thexxx_itemmethod.
Verification¶
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Spin up the local Chalice server with
chalicelocal.Create a new todo and pass in your auth token:
List your todos using the get_todos route:
Notice that now the username is no longer
defaultit should be whatever usernamewent with the auth token you supplied.Try making a new user with
pythonusers.py-cand then get their JWT tokenby calling the login route with their credentials.Call the same route as above as the new user by passing in their JWT token in the
Authorizationheader. They should get no todos since they have not created anyyet:
Now that we have it working locally lets deploy it and verify that it still works.
Verification¶
Try the same two calls above against the real API Gateway endpoint you get from yourdeploy instead of the localhost endpoint. If you lose your endpoint you can run
chaliceurlwhich will print out your API Gateway endpoint:
When you are finished your app.py file should look like: