How to parse GraphQL request string into an object

Question

I am running Apollo lambda server for GraphQL. I want to intercept the GraphQL query/mutation from the POST request body and parse it so I can find out which query/mutation the

Answer 1

You could use graphql-js like so:

const { parse, visit } = require('graphql');

const query = `
  {
    books {
      ...rest of the query
    }
  }
`

const ast = parse(query);

const newAst = visit(ast, {
  enter(node, key, parent, path, ancestors) {
    // do some work
  },
  leave(node, key, parent, path, ancestors) {
    // do some more work
  }
});

I belive this is what graphql server implementations uses under the hood, I could be mistaken though.