GraphQL 在突变函数上访问 HttpRequest

Question

Hi I'm new to GraphQL.

I want to migrate an existing endpoint to a GraphQL endpoint (Java). In oder to proceed with the application logic of the endpoint, I need the HttpServletRequest object.

How can I have access to HttpServletRequest object inside a mutation function? I try to pass it as a parameter but I have to declare a HttpServetRequest Type.

Is there a way of having access to the above object inside a mutation? Is there a way of declaring Types of external libraries?

Thank you.

Answer 1

This is normally done using the shared context. When executing an operation, you can pass an arbitrary object that will be accessible to all the Datafetcher s (resolvers), via DataFetchingEnvironment#getContext .

Eg

graphQL.execute(ExecutionInput.newExecutionInput()
    .query(operation)
    .context(servletRequest) //this is where you pass any object you need
    .build());

For older graphql-java versions:

graphQL.execute(query, context);

and later in the DataFetcher of your query/mutation:

HttpServletRequest request = environment.getContext();

This is also the common way to perform authorization: you pass in the user object via the context.