Target:
Get user data with uid=kxh from an LDAP Server
The LDAP address is: ldap://10.233.21.116:389
In the project root directory, first npm an LDAP access library ldpajs
npm install ldapjs
In the project root directory, create an app.js
var ldap = require("ldapjs"); //创建LDAP client,把服务器url传入 var client = ldap.createClient({ url: 'ldap://10.203.24.216:389' }); //创建LDAP查询选项 //filter的作用就是相当于SQL的条件 var opts = { filter: '(uid=kxh)', //查询条件过滤器,查找uid=kxh的用户节点 scope: 'sub', //查询范围 timeLimit: 500 //查询超时 }; //将client绑定LDAP Server //第一个参数:是用户,必须是从根节点到用户节点的全路径 //第二个参数:用户密码 client.bind('uid=supbind,cn=users,dc=tiger,dc=com', '123456', function (err, res1) { //开始查询 //第一个参数:查询基础路径,代表在查询用户信心将在这个路径下进行,这个路径是由根节开始 //第二个参数:查询选项 client.search('DC=tiger,DC=com', opts, function (err, res2) { //查询结果事件响应 res2.on('searchEntry', function (entry) { //获取查询的对象 var user = entry.object; var userText = JSON.stringify(user,null,2); console.log(userText); }); res2.on('searchReference', function(referral) { console.log('referral: ' + referral.uris.join()); }); //查询错误事件 res2.on('error', function(err) { console.error('error: ' + err.message); //unbind操作,必须要做 client.unbind(); }); //查询结束 res2.on('end', function(result) { console.log('search status: ' + result.status); //unbind操作,必须要做 client.unbind(); }); }); });

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.


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