我有一个react应用程序，我正在尝试使用 OAuth 添加一个 Node/Express/MySQL 后端。我的 React 应用程序托管在 localhost:3000 上，而 express 服务器托管在 localhost:4000 上。我将“代理”：“ http://localhost:4000 ”添加到react应用程序的 package.json 文件中，以将请求发送到服务器。OAuth 的授权 Javascript 来源是http://localhost:4000。授权重定向 URI 是http://localhost:4000/auth/google/redirect。
这些是我尝试访问服务器上的路由时在浏览器控制台中遇到的错误：
一个说请求的资源上不存在“Access-Control-Allow-Origin”标头。
另一个说“跨源读取阻止 (CORB) 阻止了跨源响应......使用 MIME 类型文本/html。”
我不知道我做错了什么，从昨天开始我就被卡住了。
Failed to load https://accounts.google.com/o/oauth2/v2/auth?response_type=code&redirect_uri=http%3A%2F%2Flocalhost%3A4000%2Fauth%2Fgoogle%2Fredirect&scope=profile&client_id={clientiddeletedbyme}.apps.googleusercontent.com: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access.
Cross-Origin Read Blocking (CORB) blocked cross-origin response https://accounts.google.com/o/oauth2/v2/auth?response_type=code&redirect_uri=http%3A%2F%2Flocalhost%3A4000%2Fauth%2Fgoogle%2Fredirect&scope=profile&client_id={iddeletedbyme}apps.googleusercontent.com with MIME type text/html. See https://www.chromestatus.com/feature/5629709824032768 for more details.
这是我的 react 应用程序 package.json 文件中的代码：
{
"name": "workout_tracker",
"version": "0.1.0",
"private": true,
"dependencies": {
"axios": "^0.18.0",
"firebase": "^5.3.0",
"jw-paginate": "^1.0.2",
"jw-react-pagination": "^1.0.7",
"normalize.css": "^8.0.0",
"random-id": "0.0.2",
"react": "^16.5.2",
"react-dom": "^16.5.2",
"react-headroom": "^2.2.2",
"react-icons-kit": "^1.1.6",
"react-redux": "^5.0.7",
"react-router-dom": "^4.3.1",
"react-scripts-cssmodules": "^1.1.10",
"react-swipe-to-delete-component": "^0.3.4",
"react-swipeout": "^1.1.1",
"redux": "^4.0.0",
"redux-thunk": "^2.3.0"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
},
"devDependencies": {
"redux-devtools-extension": "^2.13.5"
},
"browserslist": [
">0.2%",
"not dead",
"not ie <= 11",
"not op_mini all"
],
"proxy":"http://localhost:4000"
}
这是我的react应用程序中将请求发送到服务器的代码：
express=()=>{
axiosInstance.get("/google").then(res=>{
console.log(res);
}).catch(err=>console.log(err));
}
这是服务器中的代码
let express = require("express");
let cors= require("cors");
let mysql = require("mysql");
const util = require("util");
const passportSetup = require("./config/passport-setup");
const passport = require("passport");
let app = express();
let connection =mysql.createConnection({
host: "localhost",
user: "root",
password: "root",
database: "Workout_Tracker",
socketPath: '/Applications/MAMP/tmp/mysql/mysql.sock'
});
app.use(cors(
{origin:"http://localhost:3000",
credentials:true,
allowHeaders:"Content-Type"
}
));
app.options("/google", cors());
app.get("/google", cors(), passport.authenticate("google",{
scope:['profile']
}));
...omitted a bunch of SQL queries
app.listen(4000, () => console.log("Listening on port 4000!"));