POST Request to /api/identity-provider/login failed from browser with [missing]identityProviderId Error

[ShehabSN]

POST Request to /api/identity-provider/login failed from browser with [missing]identityProviderId Error

Description

So I was implementing a custom google login flow following along with the Docs (https://fusionauth.io/docs/v1/tech/apis/identity-providers/google). So my client app has a google auth button and it basically triggers the pop up and the user signs up/logs in. This is not related to FusionAuth yet until I send the id_token from that successful login , which I successfully received and logged, to the /api/identity-provider/login endpoint as stated in the docs. In my POST request, I include all the required information including the id_token, applicationId, and the identityProviderId for Google straight from the docs and my provider instance in my FusionAuth dashboard as you can see below.

fetch("http://localhost:9011/api/identity-provider/login", {
  method: "POST",
  body: JSON.stringify({
    data: {
      token: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
    },
    identityProviderId: "82339786-3dff-42a6-aac6-1f1ceecb6c46",
    applicationId: "XXXXXXXXXXXXXXXX",
  }),
})
  .then((res) => res.json())
  .then((result) => console.log(result))
  .catch((err) => {
    console.log(err);
  });

For some reason when I run this from my browser which is CORS enabled and my Fusion Auth application also has Google Provider enabled I get the below error. I have no idea what the actual problem is since I clearly have the identityProviderId listed exactly as how it was stated in the docs. If i remove all the other information from the request I still get the same error. What is very weird is that when I make this exact same request from Postman desktop, it works perfectly and I get back the expected response. What could be the problem here, and why am I getting such an unrelated error which makes it virtually impossible to debug?

{
	"fieldErrors": {
		"identityProviderId": [
			{
				"code": "[missing]identityProviderId",
				"message": "You must specify the [identityProviderId] property."
			}
		]
	}
}

[robotdan]

You can try adding mode: 'no-cors' to your request to see if that changes your result.

If that doesn't help, you can generate a HAR file of the request, this will likely tell you what is happening.
https://www.medianova.com/en-blog/2019/07/15/a-step-by-step-guide-to-generating-a-har-file

You can also make sure you have allowed your request origin in the FusionAuth CORS configuration if you have not yet done so. https://fusionauth.io/docs/v1/tech/reference/cors

[ShehabSN]

I tried adding the mode: 'no-cors to the request and I got the same result.

I checked the HAR file and it unfortunately doesn't show me anything new, the same 400 Code and same missing identityproviderid error.

I had the wildcard * set for allowed origins from the cors configuration in fusion auth and it still wont work. I even tried just writing the frontend url instead of the wildcard and still no luck. Am i missing any request headers that should be enabled or something? The allowed request headers are the same as default. Not sure what is going on and I have no clue how to debug, seems like a bug since the error message is completely unrelated.

[elskhn]

I am facing the same issue. Trying to issue a POST to the /api/identity-provider/login after successfully signing in with Google. My request includes the required parameters as defined in : https://fusionauth.io/docs/v1/tech/apis/identity-providers/google#complete-the-google-login but the response is still a 400 Bad Request with the same error as @ShehabSN.

[robotdan]

@ShehabSN can you post your HAR file?

[ShehabSN]

@robotdan I can email you a redacted one if that's okay

[robotdan]

Sent you a LinkedIn message w/ my email.

[robotdan]

I looked your HAR file, the Content-Type HTTP header on the POST request is text/plain;charset=utf-8 instead of application/json. Try adding this header explicitly to your request.

[ShehabSN]

Added that as a header and it works now, thanks!

[mooreds]

https://fusionauth.io/community/forum/topic/407/missing-identityproviderid-error