英文:
CORS policy issue in React and fetch
问题
我正在尝试在React TypeScript组件中使用fetch从外部API获取数据，但出现了以下错误：
Access to fetch at 'https://api.airtable.com/{my_data_base}' from origin'http://localhost:3000' has been blocked by CORS policy: Request headerfield authentication is not allowed by Access-Control-Allow-Headers inpreflight response.
我的React tsx组件如下：
import { FC, useEffect } from 'react';const Collection: FC = () => {useEffect(() => {fetch('https://api.airtable.com/v0/my_data_base', {headers: {mode: 'no-cors',Authentication: 'Bearer my_token',},}).then((resp) => resp.json()).then((data) => {console.log(data);});}, []);return <div>Collection Page Component</div>;};export default Collection;
相同的逻辑在其他不需要授权的API上运行正常，比如 https://jsonplaceholder.typicode.com/todos/1。
有任何修复方法吗？
我甚至尝试了最简单的解决方案，即浏览器扩展程序，但它们都没有起作用。
英文:
Im trying to fetch data from external api using fetch in react typescript component and having the error:
Access to fetch at 'https://api.airtable.com/{my_data_base}' from origin'http://localhost:3000' has been blocked by CORS policy: Request headerfield authentication is not allowed by Access-Control-Allow-Headers inpreflight response.
My React tsx component is:
import { FC, useEffect } from 'react';const Collection: FC = () => {useEffect(() => {fetch('https://api.airtable.com/v0/my_data_base', {headers: {mode: 'no-cors',Authentication: 'Bearer my_token',},}).then((resp) => resp.json()).then((data) => {console.log(data);});}, []);return <div>Collection Page Component</div>;};export default Collection
The same logic works fine with other apis, that don't require authorisation, like for example https://jsonplaceholder.typicode.com/todos/1
Any idea how to fix it?
I've tried even the most stupid solution which is browser extensions but non of them worked.
答案1
得分: 2
首先，mode 属性不是 headers 对象的一部分，而是属于整个选项对象，就像 herders 一样，其次，你不需要它。 <br>
另外，传递令牌的属性是 Authorization 而不是 Authentication。
英文:
First, the mode property is not part of the headers object but it belongs to the entier options object just like herders, second you don't need it. <br>
Also the property for passing tokens is Authorization not Authentication.
答案2
得分: -1
请检查您的 backend 是否允许您的 frontend 在 cors 白名单中，并且我认为设置模式是不必要的。
import { FC, useEffect } from 'react';const Collection: FC = () => {useEffect(() => {fetch('https://api.airtable.com/v0/my_data_base', {headers: {//mode: 'no-cors',Authentication: 'Bearer my_token',},}).then((resp) => resp.json()).then((data) => {console.log(data);});}, []);return <div>Collection Page Component</div>;};export default Collection
请注意，上述代码中的注释部分 mode: 'no-cors' 已被注释掉，因为我认为它是不必要的。
英文:
Check that your backend is allowing the your frontend in cors whitelist, and i think that setting the mode is unnecessary.
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
import { FC, useEffect } from 'react';const Collection: FC = () => {useEffect(() => {fetch('https://api.airtable.com/v0/my_data_base', {headers: {//mode: 'no-cors',Authentication: 'Bearer my_token',},}).then((resp) => resp.json()).then((data) => {console.log(data);});}, []);return <div>Collection Page Component</div>;};export default Collection
<!-- end snippet -->
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