一、添加如下代碼

const middleware = (request, response, next) => {
if (request.url.indexOf('/graphql') != -1 && request.headers.cookie.indexOf('auth') == -1) {
response.send(JSON.stringify({
error: "您沒有訪問這個接口的權(quán)限"
}));
return;
}
next();
}
// 注冊中間件
app.use(middleware);

const express = require('express');
const {buildSchema} = require('graphql');
const {graphqlHTTP} = require('express-graphql');


// 定義Schema,  查詢方法和返回值類型
const schema = buildSchema(`
    input AccountInput {
        name: String
        age: Int
        sex: String
        department: String
    }
    
    type Account {
        name: String
        age: Int
        sex: String
        department: String
    }

    type Mutation {
        createAccount(input: AccountInput): Account
        updateAccount(id: ID!, input: AccountInput): Account
    }
    
    // 使用Mutation時，必須要有Query
    type Query {
        accounts: [Account]
    }
`)

const fakeDB = {};

//定義查詢對應(yīng)的處理器
const root = {
   createAccount({input}) {
        // 相當于數(shù)據(jù)庫保存
        fakeDB[input.name] = input;
        //返回保存結(jié)果
        return fakeDB[input.name];
    },
    updateAccount({id, input}) {
      // 相當于數(shù)據(jù)庫的更新
      const updatedAccount = Object.assign({}, fakeDB[id], input);
      fakeDB[id] = updatedAccount;
      // 返回保存結(jié)果
      return updatedAccount;
    },
    accounts() {
        var arr = [];
        for (const key in fakeDB) {
            arr.push(fakeDB[key]);
        }
        return arr; 
    }
}

const app = express();

//添加認證權(quán)限
const middleware = (request, response, next) => {
    if (request.url.indexOf('/graphql') != -1 && request.headers.cookie.indexOf('auth') == -1) {
        response.send(JSON.stringify({
            error: "您沒有訪問這個接口的權(quán)限"
        }));
        return;
    }
    next();
}

// 注冊中間件
app.use(middleware);

app.use('/graphql', graphqlHTTP({
    schema: schema,
    rootValue: root,
    graphiql: true
}))


app.listen(3000);

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