JSON Web Token Middleware

This middleware allows you to secure execution of a webtask using JWT tokens by validating issuer, audience, and scope claims.

Usage

1. Set the wt-node-dependencies metadata property to the stringified JSON of an object with names of modules as the keys and values set to the latest version for the corresponding module.

   {
       "@webtask/middleware-compiler": "1.3.0", 
       "@webtask/jwt-middleware": "1.0.0"
   }

2. Set the wt-compiler metadata property on your webtask to @webtask/middleware-compiler.

3. Set the wt-middleware metadata property to @webtask/jwt-middleware.

4. Set the wt-authorize-execution metadata property to any value other than 0 to require either the wt:owner:<container> or wt:admin or the custom scope encoded in the wt-execution-scope metadata property. You can disable any authorization checks for the execution of the webtask by setting wt-authorize-execution metadata property to 0 or not including it in your request.

5. Set the wt-execution-iss metadata property to the value of authorization_server property obtained from the discovery endpoint of your deployment (located at {deployment_url}/api/description).

6. Set the wt-execution-aud metadata property to the value of audience property obtained from the discovery endpoint of your deployment (located at {deployment_url}/api/description).

7. Optionally, set the wt-execution-scope metadata property to the name of a custom scope that can be used for authorization of webtask execution.

8. Optionally, set the wt-debug metadata property to a comma-separated list of debug references that contains wt-middleware. This will result in additional debug information being sent to real-time logs.

Creating and securing a webtask using CLI

1. Determine which profile you will use when creating the webtask or create a new one by running wt init. For more options please refer to https://webtask.io/docs/wt-cli or wt init -h.

2. Save your webtask code into a file f.e. echo "module.exports = function (cb) { cb(null, 'Hello'); }" > hello.js.

3. In the same folder create a file meta with all the metadata properties. Each property should be on its own line structured as KEY=VALUE pair.

   wt-authorize-execution=1
   wt-node-dependencies={"@webtask/middleware-compiler":"^1.3.0","@webtask/jwt-middleware":"^1.0.0"}
   wt-compiler=@webtask/middleware-compiler
   wt-middleware=@webtask/jwt-middleware
   wt-execution-iss={ISSUER_URI}
   wt-execution-aud={AUDIENCE_URI}
   wt-execution-scope={EXECUTION_SCOPE}

4. Run the create command wt create hello.js --meta-file meta -p {profile_name}.