Trouble Migrating Introspection Logic from Apollo Server v3 to v4

[Eden-AFT]

Hi everyone,

I’m in the process of upgrading an Apollo Server project from v3 to v4. As part of the project, I need to send an introspection request to a remote schema, but I’m having trouble migrating the existing code due to deprecated functions.

Here’s a snippet of the original v3 code, which uses HttpLink and introspectSchema:

import { introspectSchema } from 'graphql-tools';
import { HttpLink } from 'apollo-link-http';

const serverLink = new HttpLink({
    uri: serverUrl,
    fetch
});

return await introspectSchema(serverLink);

I've tried converting this to use buildHTTPExecutor and schemaFromExecutor from @graphql-tools/wrap and @graphql-tools/executor-http, but it’s not working as expected. Here’s the updated snippet I attempted:

import { schemaFromExecutor } from '@graphql-tools/wrap';
import { buildHTTPExecutor } from '@graphql-tools/executor-http';

const remoteExecutor = buildHTTPExecutor({
    endpoint: serverUrl,
    fetch
});

return await schemaFromExecutor(remoteExecutor);

When the code reaches schemaFromExecutor(), I'm getting the following error:

Unhandled Rejection at: Promise Promise {
GraphQLError: Could not obtain introspection result, received the following as response;
undefined

Here are the package versions I'm using:

@graphql-tools/executor-http: ^1.1.6
@graphql-tools/wrap: ^10.0.5

Has anyone encountered this issue while upgrading? Am I missing something crucial in the migration process? Any help would be much appreciated!