React Native后端服务器启动错误

Question

我想在我的应用中使用登录facebook和google选项。我为此使用了node.js后端服务器。但是后端没有运行。每当我运行npm start时它都会返回错误。

我按照教程进行操作。

教程链接Here

server.js文件的代码

    const transformFacebookProfile = (profile) => ({
  name: profile.name,
  avatar: profile.picture.data.url,
});

// Transform Google profile into user object
const transformGoogleProfile = (profile) => ({
  name: profile.displayName,
  avatar: profile.image.url,
});

// Register Facebook Passport strategy
passport.use(new FacebookStrategy(facebook,
  // Gets called when user authorizes access to their profile
  async (accessToken, refreshToken, profile, done)
    // Return done callback and pass transformed user object
    => done(null, transformFacebookProfile(profile._json))
));

// Register Google Passport strategy
passport.use(new GoogleStrategy(google,
  async (accessToken, refreshToken, profile, done)
    => done(null, transformGoogleProfile(profile._json))
));

// Serialize user into the sessions
passport.serializeUser((user, done) => done(null, user));

// Deserialize user from the sessions
passport.deserializeUser((user, done) => done(null, user));

// Initialize http server
const app = express();

// Initialize Passport
app.use(passport.initialize());
app.use(passport.session());

// Set up Facebook auth routes
app.get('/auth/facebook', passport.authenticate('facebook'));

app.get('/auth/facebook/callback',
  passport.authenticate('facebook', { failureRedirect: '/auth/facebook' }),
  // Redirect user back to the mobile app using Linking with a custom protocol OAuthLogin
  (req, res) => res.redirect('OAuthLogin://login?user=' + JSON.stringify(req.user)));

// Set up Google auth routes
app.get('/auth/google', passport.authenticate('google', { scope: ['profile'] }));

app.get('/auth/google/callback',
  passport.authenticate('google', { failureRedirect: '/auth/google' }),
  (req, res) => res.redirect('OAuthLogin://login?user=' + JSON.stringify(req.user)));

// Launch the server on the port 3000
const server = app.listen(3000, () => {
  const { address, port } = server.address();
  console.log(`Listening at http://${address}:${port}`);
});

当我跑'npm start'时

Answer 1

在npm启动脚本中，您应该在开头添加“node”：

"start": "node node_modules/nodemon/bin/nodemon.js -- node_modules/babel-cli/bin/babel-node.js server.js"

而不是：

"start": "node_modules/nodemon/bin/nodemon.js -- node_modules/babel-cli/bin/babel-node.js server.js"