How can I implement logging in a GraphQL server using Go?

How can I implement logging in a GraphQL server using Go?

You can use middleware in your GraphQL server to log requests and responses. Would you like a code example?

Yes, please provide a code example for logging.

Here's a simple example using the 'log' package in Go:

import (
    "log"
    "github.com/graphql-go/graphql"
)

func loggingMiddleware(next graphql.Handler) graphql.Handler {
    return graphql.HandlerFunc(func(ctx context.Context, r *graphql.Request) *graphql.Response {
        log.Printf("Request: %v", r)
        response := next.ServeGraphQL(ctx, r)
        log.Printf("Response: %v", response)
        return response
    })
}

This middleware logs the request and response for each GraphQL operation.

How do I integrate this middleware into my GraphQL server?

You can integrate the middleware when setting up your GraphQL server like this:

http.Handle("/graphql", loggingMiddleware(yourGraphQLHandler))
http.ListenAndServe(":8080", nil)

This will ensure that all requests to the GraphQL endpoint are logged.

What if I want to log errors as well?

You can enhance the middleware to log errors by checking the response for any errors and logging them accordingly. Would you like to see that?