Special characters in payload are not parsed properly

[jbanulso]

I'm reporting the issue in this repo because after checking our subscriptions implementation across the whole stack here's where the culprit seems to be.

Screenshot
I had to change the actual data structure for privacy reasons, but basically this is how it looks when logging an event through onMessage. The characters displayed as � are characters with diacriticals such as á, é, í, ó, ú, ñ etc.

{
    "event": "next",
    "data": {
        "data": {
            "update": {
                "someField": {
                    "id": "1234",
                    "user": {
                        "id": "5678",
                        "fullName": "Abcdef � ��",
                        "__typename": "User"
                    },
                    "__typename": "SomeField"
                },
                "__typename": "Update"
            }
        },
        "errors": [],
        "subId": "08738bd4-57e2-4316-8d99-98ca3975100c",
        "type": "SUBSCRIPTION_DATA"
    }
}

Expected Behaviour
Special characters are encoded properly.

Actual Behaviour
They are not.

Debug Information
If you tell me how, happy to add more info.

Further Information
We're using the implementation with Apollo Client, as explained in the README.

[enisdenjo]

The server is most likely not encoding the characters in UTF-8. If I pass those same characters to a subscription resolver, I get them properly decoded on the client:

{
  "event": "next",
  "data": {
    "id": "2e3c1aec-3f20-483b-a0ff-0318a767ba38",
    "payload": {
      "data": {
        "chars": "á, é, í, ó, ú, ñ"
      }
    }
  }
}

[jbanulso]

Thanks for the quick reply @enisdenjo, will double-check this 👍🏻