Recall & Review
beginner
What is server middleware in the context of GraphQL?
Server middleware is a function or set of functions that run between the client request and the server response. It can modify requests, handle authentication, logging, or errors before the GraphQL resolver processes the query.
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beginner
How does middleware help with authentication in a GraphQL server?
Middleware can check the user's credentials or tokens before the GraphQL query runs. If authentication fails, it can stop the request early and return an error, protecting the server from unauthorized access.
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intermediate
Where in the request lifecycle does server middleware operate?
Middleware operates after the server receives the request but before the GraphQL resolvers execute. It acts as a checkpoint to modify or validate the request or response.
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beginner
Give an example of a common task performed by GraphQL server middleware.
A common task is logging each incoming request's details like query, variables, and user info. This helps monitor usage and debug issues.
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intermediate
Can middleware modify the GraphQL query or response? How?
Yes, middleware can modify the request by adding headers or changing context data passed to resolvers. It can also modify the response by intercepting errors or formatting results before sending back to the client.
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What is the main role of server middleware in GraphQL?
✗ Incorrect
Middleware runs between receiving a request and sending a response, handling tasks like authentication or logging.
Which of these is a typical use of middleware in a GraphQL server?
✗ Incorrect
Middleware often checks user authentication before the query runs.
When does middleware run in the GraphQL request process?
✗ Incorrect
Middleware runs after the server receives the request but before resolvers execute.
Can middleware modify the response sent to the client?
✗ Incorrect
Middleware can intercept and modify the response, such as formatting or error handling.
Which of these is NOT a typical middleware task?
✗ Incorrect
Rendering HTML pages is not a middleware task in GraphQL servers.
Explain what server middleware does in a GraphQL server and why it is useful.
Think about what happens before the GraphQL query runs.
You got /4 concepts.
Describe how middleware can affect the flow of a GraphQL request from client to server.
Consider middleware as a checkpoint in the request journey.
You got /4 concepts.