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Server Side Programming Articles
Page 1755 of 2109
Express.js – req.xhr Property
The req.xhr property is a Boolean property that returns True when the request's X-Requested-With header field is "XMLHttpRequest". The True pointer basically indicates that the request was issued by a client library such as jQuery.Syntaxreq.xhrExample 1Create a file with the name "reqXhr.js" and copy the following code snippet. After creating the file, use the command "node reqXhr.js" to run this code as shown in the example below −// req.xhr Property Demo Example // Importing the express module var express = require('express'); // Initializing the express and port number var app = express(); // Initializing the router from ...
Read MoreExpress.js – req.stale Property
The req.stale property checks whether a request is fresh or stale in the client's cache. If the property returns True, it means the client's cache is stale and all the data needs to be transferred to the client's system. Else, only the non-cached data needs to be transmitted.Syntaxreq.staleExample 1Create a file with the name "reqStale.js" and copy the following code snippet. After creating the file, use the command "node reqStale.js" to run this code as shown in the example below −// req.stale Property Demo Example // Importing the express var express = require('express'); // Initializing the express and ...
Read MoreExpress.js – req.secure Property
The req.secure property returns a Boolean value that returns true if a TLS connection is established, else it will return False.Its logic is similar to the following method −--> req.protocol == "https"Syntaxreq.secureExample 1Create a file with the name "reqSecure.js" and copy the following code snippet. After creating the file, use the command "node reqSecure.js" to run this code as shown in the example below −// req.secure Property Demo Example // Importing the express var express = require('express'); // Initializing the express and port number var app = express(); // Initializing the router from express var router = ...
Read MoreExpress.js – res.set() Method
The res.set() method can be used for setting the response's HTTP header field to value. You can also set multiple fields at once by passing an object as the parameter.Syntaxres.set( field, [value] )Example 1Create a file with the name "resSet.js" and copy the following code snippet. After creating the file, use the command "node resSet.js" to run this code as shown in the example below −// res.set(field, [value]) Method Demo Example // Importing the express var express = require('express'); // Initializing the express and port number var app = express(); // Initializing the router from express var ...
Read MoreExpress.js – Getting Remote Client Address
An application needs to maintain the remote client address for managing the number of requests from a computer system and tracking its usage. But sometimes, the server runs behind an NGINX server, so we need to check its forward request. For this purpose, we can use "x-forwarded-for"Syntaxreq.headers['x-forwarded-for'] || req.socket.remoteAddressIf the proxy isn't yours, one should be careful while using the x-forwarded-for header, because it can be spoofed.Example 1Create a file with the name "remoteAddress.js" and copy the following code snippet. After creating the file, use the command "node remoteAddress.js" to run this code as shown in the example below −// ...
Read MoreExpress.js – res.jsonp() Method
The res.jsonp() method sends the json response with JSONP support. This method is similar to the res.json() method with the only difference being that it provides the JSONP callback support.Syntaxres.jsonp ( [body] )Example 1Create a file with the name "resJsonp.js" and copy the following code snippet. After creating the file, use the command "node resJsonp.js" to run this code as shown in the example below −// res.jsonp([body]) Method Demo Example // Importing the express module var express = require('express'); // Initializing the express and port number var app = express(); // Initializing the router from express var ...
Read MoreExpress.js – app.disabled() Method
The app.disabled() method checks and returns True if the property name passed is set to False or is disabled. If not, we can disable the property by using the app.disable() method.Syntaxapp.disabled( name )Example 1Create a file with the name "appDisabled.js" and copy the following code snippet. After creating the file, use the command "node appDisabled.js" to run this code as shown in the example below −// app.disabled() Method Demo Example // Importing the express module const express = require('express'); // Initializing the express and port number var app = express(); // Initializing the router from express var ...
Read MoreWhat are the differences between C++ and Go?
Let us understand the concepts of C++ and Go before learning the differences between them.GoIt is an open source programming language developed by Google employees, It is intended to be fast compiled, garbage collected, strongly typed, and with explicit support for concurrent programming.The original developers Rob Pike, Robert Griesemer and Ken Thompson started out in the year 2007. It was licensed under the BSD license. In the case of large systems it supports statically typing and scalability.FeaturesThe features of Go are as follows −Language DesignPowerful standard libraryPackage ManagementStatic TypingTesting SupportC-inspired syntaxCompiledSafe and open sourceAdvantagesThe advantages of Go are as follows ...
Read MoreC++ code to count maximum hay-bales on first pile
Suppose we have an array A with n elements and another value d. A farmer has arranged n haybale piles on the firm. The ith pile contains A[i] hay-bales. Every day a cow can choose to move one hay-bale in any pile to an adjacent pile. The cow can do this on a day otherwise do nothing. The cow wants to maximize the hay-bales in first pile in d days. We have to count the maximum number of hay-bales on the first pile.So, if the input is like d = 5; A = [1, 0, 3, 2], then the output ...
Read MoreC++ code to find name with O's on Fibonacci positions
Suppose we have a number n. Amal wants to give a name to his pet. He will follow an algorithm. The name will be n characters long. The name will contain uppercase and lowercase letters 'O's and 'o's. The algorithm suggests the i-th letter of the name should be 'O' (uppercase) if i is a member of Fibonacci sequence, and 'o' (lowercase) otherwise. The letters in the name are numbered from 1 to n.So, if the input is like n = 10, then the output will be "OOOoOooOoo", because first fibonacci numbers are 1, 2, 3, 5 and so on.StepsTo ...
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