Could function payload lenght

[DavorStajcer]

For some reason my payload is cut off when sending a cloud function call request. Here is the code:

  String response = cfunctions.call(aClient, GoogleCloudFunctions::Parent(FIREBASE_PROJECT_ID, PROJECT_LOCATION), "checkIsSmartLockCodeValid", "{\"heljo\": \"12345678901234567890\"}");  //, asyncCB, "callTask");
  if (aClient.lastError().code() == 0)
    Serial.println(response);
  else
    printError(aClient.lastError().code(), aClient.lastError().message());

Here is what I see in the serial monitor

Error, msg: {
  "error": {
    "code": 400,
    "message": "Invalid JSON payload received. Expected , or } after key:value pair.\n{\"data\":\"{\"heljo\": \"12345678901\n           ^",
    "status": "INVALID_ARGUMENT"
  }
}
, code: 400

Can someone please help me too see what is wrong here? I spend a lot of time reaching the reason WHY the payload is cut.

Thanks!

[mobizt]

As the server returns information, your payload is invalid instead of cut-off string problem.

The payload should be a string not JSON representation string.

JSON representation or its serialized string is not allowed.

https://cloud.google.com/functions/docs/reference/rest/v1/projects.locations.functions/call#request-body

[DavorStajcer]

@mobizt Thanks for your response!

I do not understand how "JSON representation or its serialized string is not allowed." Here is why:

1. In your library you are adding "{\"data\":\"" + payload + "\"}" (see pic below). So I am always sending a json encoded string.

2. When I send a string (e.g. In this form which is not json "first,second,third") in the GCP logs explorer it says ".. is not valid JSON"
   And in serial monitor I see a response

{
  "executionId": "lksd525gmb7v",
  "error": "\u003c!DOCTYPE html\u003e\n\u003chtml lang=\"en\"\u003e\n\u003chead\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003ctitle\u003eError\u003c/title\u003e\n\u003c/head\u003e\n\u003cbody\u003e\n\u003cpre\u003eBad Request\u003c/pre\u003e\n\u003c/body\u003e\n\u003c/html\u003e\n"
}

I am using a 1st gen HTTP callable function

export const checkIsSmartLockCodeValid = region('europe-west2').https.onRequest(
  (req, res) =>
    cors({ origin: true })(req, res, async () => {

So:

• not sending a json object Firebase complains "it is not a valid JSON"
• when I am sending a json object my string is cutt off and I get "Invalid JSON payload received."

Should I be doing something differently? Any response will be much appreciated!

[mobizt]

Actually, I don't have to explain anything because it is server returning error and it is the Cloud Functions APIs, which you have to try or do some research yourself.

The payload for the Cloud Functions's call method REST API is the JSON representation object i.e. {"data":"<string>"}.

The input i.e. the data field is string.

Even, you wrote your own HTTP request to send the payload like {"data":{"your_object_data":"your_value"}}, you will get the error from the server that you are trying to assign the object to the scalar field.

I already tested this before confirming that it does not allow by APIs.

That's it.

[mobizt]

This call method is obsoleted, and it is available only in API v1.

[mobizt]

When I send a string (e.g. In this form which is not json "first,second,third") in the GCP logs explorer it says ".. is not valid JSON"

I did not see any issue when sending string with commas.