A library for securely storing and retrieving user credentials from JSONBin
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.cn-greasyfork.org/scripts/470767/1219648/Sign%20upLogin%20%20Library.js
// ==UserScript==
// @name Sign up/Login Library
// @namespace http://tampermonkey.net/
// @version 1
// @description A library for securely storing and retrieving user credentials from JSONBin
// @author longkidkoolstar
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_xmlhttpRequest
// ==/UserScript==
const binId = 'YOUR_BIN_ID_HERE';
const accessKey = 'YOUR_ACCESS_KEY_HERE';
class LoginLibrary {
constructor() {
// Check if user is logged in
if (this.isLoggedIn()) {
console.log('User is logged in');
this.retrieveUserCredentials();
} else {
console.log('User is not logged in');
this.promptUserCredentials();
}
}
isLoggedIn() {
return GM_getValue('username') && GM_getValue('password');
}
promptUserCredentials() {
// Prompt user to enter username and password
const username = prompt('Enter your username:');
const password = prompt('Enter your password:');
// Save username and password to Tampermonkey
GM_setValue('username', username);
GM_setValue('password', password);
// Save username and password to JSONBin
this.saveUserCredentialsToJSONBin(username, password);
}
retrieveUserCredentials() {
const username = GM_getValue('username');
const password = GM_getValue('password');
console.log(`Username: ${username}, Password: ${password}`);
}
saveUserCredentialsToJSONBin(username, password) {
GM_xmlhttpRequest({
method: 'GET',
url: `https://api.jsonbin.io/v3/b/${binId}`,
headers: {
'X-Bin-Access-Token': accessKey,
'X-Access-Key': accessKey
},
onload: function (response) {
const existingData = JSON.parse(response.responseText).record;
let isUsernameFound = false;
let isPasswordCorrect = false;
let isUsernameTaken = false;
for (const user in existingData.users) {
if (existingData.users.hasOwnProperty(user)) {
if (existingData.users[user].username === username) {
isUsernameFound = true;
if (existingData.users[user].password === password) {
isPasswordCorrect = true;
}
break;
}
}
}
if (isUsernameFound && isPasswordCorrect) {
console.log('User logged in successfully.');
// Save username and password to Tampermonkey
GM_setValue('username', username);
GM_setValue('password', password);
} else if (!isUsernameFound || !isPasswordCorrect) {
for (const user in existingData.users) {
if (existingData.users.hasOwnProperty(user)) {
if (existingData.users[user].username === username) {
isUsernameTaken = true;
break;
}
}
}
if (!isUsernameTaken) {
const userData = {
username: username,
password: password
};
const mergedData = {
...existingData,
users: {
...existingData.users,
[username]: userData
}
};
GM_xmlhttpRequest({
method: 'PUT',
url: `https://api.jsonbin.io/v3/b/${binId}`,
headers: {
'Content-Type': 'application/json',
'X-Bin-Access-Token': accessKey,
'X-Access-Key': accessKey
},
data: JSON.stringify(mergedData),
onload: function (response) {
console.log('User registered successfully.');
}
});
} else {
const newUsername = prompt('That username is already taken. Please enter a new username:');
this.saveUserCredentialsToJSONBin(newUsername, password);
}
}
}
});
}
}
new LoginLibrary();