Introspection of remote endpoint throws error without explicit "User-agent" header

I’m trying to perform an introspection and graphql SDL file generation locally using the following configuration:

{
  "name": "Hasura Tutorial GraphQL Schema",
  "schemaPath": "./schema.graphql",
  "extensions": {
    "endpoints": {
      "Default GraphQL Endpoint": {
        "url": "https://hasura.io/learn/graphql",
        "headers": {
          "Authorization": "Bearer <token>"
        },
        "introspect": true
      }
    }
  }
}

“token” above and surrounding brackets are replaced by my auth0 token. Using the above configuration works fine with @graphql-codegen so I know my token, etc. is all working fine. I would just prefer to use this plugin.

Link to Repo with Reproduction or Steps to Reproduce:

1. Obtain auth token by logging into https://hasura.io/learn/graphql/graphiql
2. Update .graphqlconfig per the above format along with token
3. Restart project and get “perform introspection prompt…”; click it
4. Get the following error: “GraphQL Introspection Error A valid schema could not be built using the introspection result: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $”

Expected behavior Connect to endpoint, perform introspection, and output SDL to “./schema.graphql” file

Version and Environment Details Operation system: MacOS v10.15.6 IDE name and version: Webstorm v2020.1.4 Plugin version: 2.5.0

Additional Context: I’m trying to step through a Hasura GraphQL with React+Typescript tutorial while replacing the use of the @graphql-codegen library with this plugin. The link to the tutorial is https://hasura.io/learn/graphql/typescript-react-apollo/queries/4-mapping-types

Thank you.

[baronyoung]

Ok, I just created a fresh project with nothing other than the standard React and Typescript libraries installed and tried it again. It was successful. My conclusion is there was something with another library I have installed in my other project that was causing the error. Thank you for all your help and sorry for raising an issue that was on my end.

[majorhayes]

I just stumbled upon “error code: 1010” and found this issue so i’d like to add my observation:

Usually i have just one endpoint in my .graphqlconfig and things work without problems. Today i added a second endpoint for temporary use and for this endpoint i receive the error. As suggested in this discussion the error goes away when adding a “user-agent” header with arbitrary content. …

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $

I was getting this same error with just 1 remote server configured. I even added a “user-agent” header and it still failed. I changed the header to “User-Agent” and it started working.