我目前正在构建服务器，以便在启动时使用服务器/应用程序侦听器执行身份验证功能。我正在尝试在控制器文件中使用外部函数来执行此操作，服务器代码如下：
//Start listener on the port
app.listen(port, () => {
console.log(`Server is listening to port ${port}... (http\://localhost\:3000)`);
});
//Start Authentication when server starts
app.on('listening', () => {
console.log('Running Authentication...')
auth.main()
});
并且正在我的auth中使用这些异步模块，这是执行启动功能的正确方法吗？对于要发送回的数据，是否应该将它们存储在全局变量中，然后在函数末尾使用“ res.send”？有什么办法可以改善我的代码？
const main = (req, res) => {
//Asynchronous Waterfall Call of 'Getting Access Tokens' (Stages 1-3)
async.waterfall([
getCookieData,
getAuthCode,
getAccessToken
], (err, result) => {
if (err) {
alert('Something is wrong!');
}
return alert('Done!');
});
//STAGE 1 - USE CUSTOMER DETAILS TO RETRIEVE COOKIE AND CSRF SESSION DATA
getCookieData = async (callback) => {
//If the paramter test passes then proceed
var options = {
//Type of HTTP request
method: 'POST',
//URI String
uri: authURL,
//HTTP Query Strings
qs: {
'client_id': clientID
},
//HTTP Headers
headers: {
'cache-control': 'no-cache',
'Accept': 'application/json',
'Host': host,
'Content-Type': 'application/json'
},
//HTTP Body
body: {
'username': username,
'password': password
},
json: true // Automatically stringifies the body to JSON
//resolveWithFullResponse: true // Get the full response instead of just the body
//simple: false // Get a rejection only if the request failed for technical reasons
};
console.log(`Beginning HTTP POST Request to ${authURL}...`);
//await literally makes JavaScript wait until the promise settles, and then go on with the result.
await rp(options)
.then((parsedBody) => {
//POST Succeeded...
Console.log('Successful HTTP POST!');
try {
let csrf = response.body('csrftoken'),
ses = response.body('session'),
sesk = `session=${ses}`;
} catch (e) {
console.log(`STAGE 1 - Error occurred when assigning url variables. Error: ${e}`);
console.error('STAGE 1 - Error occurred when assigning url variables. Error:', e);
callback(`STAGE 1 - Error occurred when assigning url variables. Error: ${e}`)
}
console.log(`Successful grab of the cookie: ${ses} and csrf token: ${csrf}. Getting authorisation code now!`);
//Asynchronous callback for the next function - return = defensive architecture
return callback(null, authCodeURL, customerID, clientID, csrf, sesk);
})
.catch((err) => {
if (res.statusCode == 400) {
console.log(`Error Message: ${res.body.message}. Status: ${res.body.status}`);
console.error('Error Message:', res.body.message, 'Status:', res.body.status);
callback(`Error Message: ${res.body.message}. Status: ${res.body.status}`);
} else if (res.statusCode == 401) {
console.log(`Error Message: ${res.body.message}. Status: ${res.body.status}`);
console.error('Error Message:', res.body.message, 'Status:', res.body.status);
callback(`Error Message: ${res.body.message}. Status: ${res.body.status}`);
} else {
console.log(`Failed to retrieve the cookie data! Error: ${error}`);
console.error('Failed to retrieve the cookie data! Error:', error);
callback(`Failed to retrieve the cookie data! Error: ${error}`);
}
});
},
//STAGE 2 - USE COOKIES AND CSRF TOKEN TO GET AUTH CODE
//Is the word async needed? it is not asyncchronous but sequential
getAuthCode = async (authCodeURL, customerID, clientID, csrf, sesk, callback) => {
//If successful, proceed:
var options = {
method: 'POST',
uri: authCodeURL,
qs: {
'client_id': clientID,
'response_type': 'code',
'scope': 'all'
},
headers: {
'X-CSRF-TOKEN': csrf,
'Accept': 'application/json',
'Cookie': sesk,
'Content-Type': 'application/json'
},
body: {
'customer_id': customerID
},
json: true // Automatically stringifies the body to JSON
};
console.log(`Beginning HTTP POST Request to ${authCodeURL}...`);
//await literally makes JavaScript wait until the promise settles, and then go on with the result.
await rp(options)
.then((parsedBody) => {
//POST Succeeded...
Console.log('Successful HTTP POST!');
try {
let authCode = response.body.JSON('auth_code'),
swapurl = `https://${host}${url3}`;
} catch (e) {
console.log(`STAGE 2 - Error occurred when assigning url variables. Error: ${e}`);
console.error('STAGE 2 - Error occurred when assigning url variables. Error:', e);
callback(`STAGE 2 - Error occurred when assigning url variables. Error: ${e}`);
}
console.log(`The authorisation Code is ${authcode}. Getting Access Token now!`);
//Asynchronous callback for the next function - return = defensive architecture
return callback(null, swapURL, clientID, clientSecret, authCode);
})
.catch((err) => {
if (res.statusCode == 400) {
console.log(`Error Message: ${res.body.message}. Extra: ${res.body.extra}`);
console.error('Error Message:', res.body.message, 'Extra:', res.body.extra);
callback(`Error Message: ${res.body.message}. Extra: ${res.body.extra}`);
} else {
console.log(`Failed to retrieve the authorisation code! Error: ${error}`);
console.error('Failed to retrieve the authorisation code! Error: ', error);
callback(`Failed to retrieve the authorisation code! Error: ${error}`);
}
});
},
//STAGE 3 - USE AUTH CODE TO GET ACCESS TOKEN
//ASYNC NEEDED?
getAccessToken = async (swapURL, clientID, clientSecret, authCode, callback) => {
//If successful, proceed:
var options = {
method: 'POST',
uri: swapURL,
qs: {
'client_id': clientID,
'grant_type': 'authorization_code',
'client_secret': clientSecret,
'code': authCode
},
json: true // Automatically stringifies the body to JSON
};
console.log(`Beginning HTTP POST Request to ${swapURL}...`);
//await literally makes JavaScript wait until the promise settles, and then go on with the result.
await rp(options)
.then((parsedBody) => {
//POST Succeeded...
Console.log('Successful HTTP POST!');
try {
let accessToken = response.body('access_token'),
refreshToken = response.body('refresh_token');
} catch (e) {
console.log(`STAGE 3 - Error occurred when assigning url variables. Error: ${e}`);
console.error('STAGE 3 - Error occurred when assigning url variables. Error:', e);
callback(`STAGE 3 - Error occurred when assigning url variables. Error: ${e}`);
}
console.log(`The access Token is ${accessToken} and the refreshToken which is ${refreshToken}! These are only valid for 2 hours!`);
//Asynchronous callback for the waterfall - return = defensive architecture
return callback(null, 'done');
})
.catch((err) => {
console.log(`Failed to retrieve the access/refresh Token! Error: ${error}`);
console.error('Failed to retrieve the access/refresh Token! Error:', error);
callback(`Failed to retrieve the access/refresh Token! Error: ${error}`);
});
}
}
答案 0 :(得分：1)
您可以将您的 auth.main（）用作中间件，也可以简单地将您的代码运行为
app.listen(port, () => {
console.log(`Server is listening to port ${port}...(http\://localhost\:3000)`);
auth.main();
});
或只需将您需要运行的任何代码放在此处的引导程序中即可。
let express = require("express");
...
auth.main();
app.listen(444);