Firebase Cloud Functions https.onCall 完成状态码:204 [英] Firebase Cloud Functions https.onCall finished with status code: 204

问题描述

Firebase 函数

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const cors = require('cors')({ origin: true });

exports.addMessage = functions.https.onCall((data, context) => {
  return { text: "Test" };
});

问题

问题是当我从应用程序调用此函数时，我首先得到完成状态码:204，然后完成状态码:200

The problem is when i call this function from the app i first get finished with status code: 204 and after that finished with status code: 200

204

如何防止这种情况发生?

How can i prevent this?

推荐答案

这是正常的，你不应该采取任何措施来阻止它.导致 204 的第一个请求是 CORS 执行 预检请求.200 是最终的服务请求.

This is normal, and you shouldn't do anything to prevent it. The first request that results in 204 is what happens when CORS performs a preflight request. The 200 is the final serviced request.

您可以在此处阅读更多相关信息:

You can read more about that here:

两次调用 Post 请求:使用 http 204和 200

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