Sign in with Apple using Vapor 4

Question

I'm trying to implement Sign In with Apple using Vapor 4 I followed Vapor Docs But when I use the api and send user's token (even as a request header or in the body), it returns the following error

{
    "error": true,
    "reason": "Data corrupted at path ''. The given data was not valid JSON. Underlying error: Error Domain=NSCocoaErrorDomain Code=3840 \"Invalid value around line 1, column 0.\" UserInfo={NSDebugDescription=Invalid value around line 1, column 0., NSJSONSerializationErrorIndex=0}."
}

As I mentioned, I used two different method. First one, sending user token in the body:

    func SignInWithApple(req: Request)async throws -> Token{
        //Decode request body -> succeeded
        let data = try req.content.decode(SignInWithAppleToken.self)
        //The bundle id of the iOS app
        guard let appIdentifier = Environment.get("ios_app_id") else{
            throw Abort(.internalServerError)
        }
        //The error happens at this line
        let siwaToken = try await req.jwt.apple.verify(data.token, applicationIdentifier: appIdentifier)
        print(siwaToken)

//Rest of logic
}

Second one, sending user token in request header (Bearer)

func routes(_ app: Application) throws {
 app.jwt.apple.applicationIdentifier = "iOS_app_bundle_Id"
    app.get("apple") { req async throws -> HTTPStatus in
        let token = try await req.jwt.apple.verify()
        print(token) // AppleIdentityToken
        return .ok
    }
}

This how I send the request in postman: 1- Sending data in request body (for method 1):

2- Sending data in request header (for method ):

Any suggestion?

Answer 1

That's most likely because you're sending the identityToken as is which is Data, but you need to convert it to String before sending it to your backend with something like this:

func handleAppleSignIn(_ auth: ASAuthorization) {
    guard let credential = auth.credential as? ASAuthorizationAppleIDCredential else {
        print("Invalid Apple ID credential")
        return
    }

    guard let idToken = credential.identityToken, let idTokenString = String(data: idToken, encoding: .utf8) else {
        print("Unable to convert identityToken to String")
        return
    }

    print(idTokenString)
    // rest of the logic
}