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This article mainly introduces Node. how to Use the domain module in js exception handling. The memory leakage problems are mentioned at the end of this article. It is worth noting that if you need a friend, you can refer to the domain module provided by NodeJS, it can simplify Exception Handling for asynchronous code. Before introducing this module, we need to first understand the concept of "domain. Simpl
Three file writing methods for Node. js and three write methods for node. js This article describes three methods for writing files in Node. js. 1. Write files through the pipeline streamUsing pipelines to transmit binary streams
');Var buffer = new Buffer (8 ); Var mineType = mime. lookup (new_file_path );Var fileType = mime. extension (mineType ); Fs. readSync (fd, buffer, 0, 8, 0 );Var newBuf = buffer. slice (0, 4 );Var head_1 = newBuf [0]. toString (16 );Var head_2 = newBuf [1]. toString (16 );Var head_3 = newBuf [2]. toString (16 );Var head_4 = newBuf [3]. toString (16 );Var head_iden = head_1 + head_2; Var tempFileType = FILE_TYPE_CONFIG [head_iden];If (! TempFileType ){Head_iden + = head_3; TempFileType = FILE_TY
How to handle. pfx suffix files in Node. js, node. js. pfx Preface In nodejs, various third-party Encryption Files will be obtained during encryption and decryption, and their suffixes will be the same ,. key /. pem /. pfx and so on. Can it be customized? It is a file. However, today I have read a lot of nodejs librari
step will go to github to download npm files and progress, and the fourth step is to install npm to node. js will copy several cmd files and the mode_modules folder to the nodejs directory. In this way, npm is configured. If you need to install any modules, enter npm install ***. If there is no npm or windows users can use github to download socket. io and put it into the node_modules folder. For detailed
Node. js crawls Chinese webpage garbled issues and solutions, node. js Chinese webpage When Node. js captures a non-UTF-8 Chinese webpage, garbled characters may occur. For example, if
The fs module of nodejs does not provide a copy method, but we can easily implement one. this method is to read all the file content into the memory and then write the file, this is not a big problem for small text files, such as grunt-file-copy. I. opening analysis Stream is an abstract interface implemented by many objects in Node. For example, a request to an HTTP server is a stream, and stdout is also
The fs module of nodejs does not provide a copy method, but we can easily implement one. This method is to read all the file content into the memory and then write the file, this is not a big problem for small text files, such as grunt-file-copy. I. Opening Analysis Stream is an abstract interface implemented by many objects in Node. For example, a request to an HTTP server is a stream, and stdout is also
platform that meets specific needs. "According to Toptal, a Web engineering company, the true highlight of Node. js is the construction of fast and scalable network applications.6. Provide services for proxy servers One of the biggest advantages of using Node. js is that it acts as a proxy server to provide services f
This article describes how to use socket in Node. js to create private chat rooms and public chat rooms. For more information, see: In the previous article, we will introduce the use of Angular, Nodejs, and socket. i/O builds chat rooms and multi-user chat rooms. This article continues to introduce Node. use socket in js
Node. js and Sails ~ Project Structure and Mvc implementation and Log Mechanism, node. jssails This article first introduces the Log Mechanism of node. js and sails from the installation of Sails. You can't wait to see the following, okay. Sails is a
01.js/** * The first background language is ASP (Microsoft),*/varExpress = Require ("Express");//Database ReferencevarMongoclient = require (' MongoDB '). mongoclient;varassert = require (' assert ');//Debug: Assert.equal (NULL,ERR); error stop executing the following statementvarApp =Express ();//The address of the database connection, the last slash indicates the database name, and the database does not e
This article mainly introduces node. http. the createServer method is described in this article. createServer method description, syntax, receiving parameters, use instances and implementation source code. For more information, see Method description: This function is used to create an HTTP server and use requestListener as the listener function for request events. Syntax: The Code is as follows: Http. createServer ([requestListener]) Because this
Details about Node. js serialization Process Control and node. js serialization Serial task: the task that needs to be followed is called a serial task. You can use the callback method to execute several asynchronous tasks in sequence. However, if there are too many tasks, you must organize them. Otherwise, excessive c
Sample Code for renaming and moving node. js files, and node. js sample code An example of uploading files by node is as follows, DoUpload () {var formData = new FormData ($ ("# uploadForm") [0]); $. ajax ({url: 'http: // localhos
This article mainly introduces the implementation of multi-process by child_process in Node. js. For more information, see The code is as follows: Var http = require ('http ');Function fib (n ){If (n Return 1;} Else {Return fib (n-2) + fib (n-1 );}}Var server = http. createServer (function (req, res ){Var num = parseInt (req. url. substring (1), 10 );Res. writeHead (200 );Res. end (fib (num) + "\ n ");});
This article mainly introduces the implementation of multi-process by child_process in Node. js. For more information, see The Code is as follows: Var http = require ('http ');Function fib (n ){If (n Return 1;} Else {Return fib (n-2) + fib (n-1 );}}Var server = http. createServer (function (req, res ){Var num = parseInt (req. url. substring (1), 10 );Res. writeHead (200 );Res. end (fib (num) + "\ n ");});
Node. js Addons translation (C/C ++ extension), node. jsaddons PS: Upgrade Node 6.2.1 first, and the Node upgrade command npm install-g n; n stable. NOde. js extension is a dynamic link
and enter "node-v" to ensure that Node is in your environment variables and view the Node you are running. js version. enter "npm-v" to view the version of the Node package management tool you have installed. have you finished it? OK. Let's get started !! Open the Notepad p
This article mainly introduces common methods of CRYPTO in the NODE. JS encryption module. For more information, see use require ('crypto') to call the encryption module. The encryption module requires the underlying system to support OpenSSL. It provides a security credential encapsulation method that can be used for HTTPS security networks and common HTTP connections. This module also provides a set of h
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