node js cluster module

Today summarizes the use of the formidable module under node. js and gives some brief instructions below.1) Create Formidable.incomingform Objectvar form = new Formidable. Incomingform ()2) form.encoding = ' Utf-8 ' Sets the encoding of the form field3) Form.uploaddir = "/my/dir"; Set the folder to upload files, default to the system's temporary folder, you can u

Node. js ------ (Url, QueryString, Path) ModuleI. In the beginning, I analyzed the three modules in this article because they are not very long in length, and there is a dependency between them, so we will introduce and analyze the instance in sequence. For more information, see the following document: (1), "Url module": 1 var url = require ('url '); 2 var queryU

Define a node module: currency.jsvar canadiandollar = 0.91; function roundtwodecimals (amount) { return math.round (amount * +)/function (Canadian) { return roundtwodecimals (Canadian *function (US) { return roundtwodecimals (US/ canadiandollar);}Introduce a module:The code in the following test-currency.js, which require the Currency.js module:var currency = require ('./currency '); Console.log

Module Address: https://github.com/felixge/node-formidablevarFormidable = require (' formidable ')), HTTP= Require (' http '), Util= Require (' Util '); Http.createserver (function(req, res) {if(Req.url = = '/upload ' req.method.toLowerCase () = = ' Post ') { //parse a file upload varform =NewFormidable. Incomingform (); Form.parse (req,function(Err, fields, files) {Res.writehead ($, {' Content-ty

JS Create a classThen instantiate it in another program using this class1. Create a user class--------------User.js--------------function User (id,name,age) {This.id=id;This.name=name;This.age=age;This.enter=function () {Console.log ("Access to the Library");}}Module.exports = User;2. Call----------------------N3_modalcall.js-------------var http = require (' http ');var User = require ('./models/user ');Http.createserver (function (request, response)

node. js in FS moduleCommon featuresImplementing read- Write directory operations for files-Synchronous and asynchronous coexistence, asynchronous without synchronization-Fs.readfile cannot read a file that is larger than the running memory and will not use the ReadFile method if the file is too large-File large shunt read, stream- introduction of FS module-Let F

Database Exception! ‘); Connection.end (); Throw error; }}); *///query parameter var sql = options[' sql '];var args = options[' args '];var handler = options[' handler '];//execute query if (!args) {var q uery = connection.query (SQL, function (error, results) {if (error) {console.log (' db-') Execute the query statement exception! '); throw ErroR;} Processing result handler (results);}); Console.log (query.sql);} else {var query = connection.query (sql, args, function (error, results) {if (er

+ ': ' + time.getfullyear () + "-" + (Time.getmonth () + 1) + "-" + time.getdate () + "" + time.gethours () + ":" + time.getminutes () + ":" + time.getseconds () + ":" + time.getmilliseconds () + "server-side ====>> client" ; Socket.write (current); }); Socket.on (' End ',function() {Console.log (' Disconnected '); }); Socket.on (' Error ',function() {Console.log (' Disconnected '); }); Server.listen (8814,function() {Console.log (' Server start! ');});Client:varNET = require (' net ')

command is used to switch to the current database. If the database does not exist, a new one will be created first ). (5) In the shell command window, type the following command: "db. users. insert ({" name ":" bigbear "," password ":" 12345678 "})", (This command inserts a piece of data into the users set. If the set users does not exist, a new one is created first, and then the data is inserted. The parameter is passed in as JSON format ). (6) In the shell command window, type the following c

extra parameter will call Util.inspect () to the string. These strings are concatenated together and separated by a space. As an example: var util = require ( ' util ' var result Span class= "pun" >= Util. ( '%s:%s ' , ' foo ' , ' bar ' , ' Baz ' console.result Operation Result: ' Foo:bar Baz ' 3: If the first argument is a non-formatted string, all arguments are converted to a string and stitched together in a space, an

"," "," = ", {maxkeys:2}); The return value is: {name: ' Whitemu ', Sex: ' Man '}2.querystring.stringify: Serializes an object to a stringQuerystring.stringify (obj,separator,eq,options)1) Obj: The object that needs to be serialized;2) separator is a split character (default is ' '), can be omitted;3) EQ is used to divide the key and the value of the symbol (such as: Name=sophiehui, can be omitted, the default is ' = ');4) Options pass in an object that sets the encodeURIComponent property, e

, and then decide whether to adjust;2, if the price is too high, then the search out of the ranking results compared to the latter, there is no customer to book hotels, business is notBecause of the hotel booking business, such as more than 2000, if a relying on manual to query ranking is more passive, and it is difficult to bigger, so his demand I analyzed a bit is feasible, and can be made a good real-time warning system (of course, the data 5-10 minutes will automatically refresh the page onc

command is used to switch to the current database. if the database does not exist, a new one will be created first ). (5) in the shell command window, type the following command: "db. users. insert ({" name ":" bigbear "," password ":" 12345678 "})", (This command inserts a piece of data into the users set. if the set users does not exist, a new one is created first, and then the data is inserted. the parameter is passed in as JSON format ). (6) in the shell command window, type the following c

is triggered when an error occurs in the upload stream, and when an error occurs, if you want to continue triggering the requestData event, you must manually call the Request.resume () method) Form.on (' aborted ', function () {});This event is triggered when the user aborts the request, and the timeout and close events in the socket also trigger theForm.on (' End ', function () {}), when the event is triggered, the error event will also be triggered.When all the requests have been received and