Most voted "web-application" questions
In computing, web applications are generally computer systems designed for use from a browser, via the Internet, or applications developed using web technologies such as HTML, Javascript, and CSS. Can be run from an HTTP Web Host server or locally, on the user’s device.
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answer145
viewsIn Reactjs, is it possible to ensure that a class method is only executed after setState is completed?
I’m making a freecodecamp project using Reactjs. It consists of making two Leaderboards: one of the campers with the highest score in the last 30 days and another of those that have accumulated the…
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answers69
viewsWhy doesn’t my Managedbean receive the amount passed on the xhtml page?
I am in error of those who can no longer visualize the problem and maybe, you "looking from outside" can help me. The question is simple, I’m not getting the value of an input from my view in…
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answers5033
viewsUse UTF-8 or Latin1?
I started a new project and when creating the database (Mysql), I didn’t think twice, I put a CHARSET=utf8. The application will support Portuguese and English and users should use only these two…
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answers384
viewsDownload data from Stock Exchange tables in R
I have the following code, I need to download the data that is in the table, but the dataframe is always returning empty. library(tidyverse) library(rvest) library(bizdays) library(dplyr)…
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answers493
viewsbelongs_to, has_many
Hello everyone all good? I’m starting on Rails and got a little problem to make a simple web application with: Customer registration (with name and address) Employee register (only with name) Work…
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answer32
viewsWhen I use a certain namespace class, do I need to use require?
I was giving a studied in some PHP features, so I came across something that generated me curiosity. When using namespace I ended up having to do something similar to this: use Model\User\Create…
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answer73
viewsIs it possible to use libraries within the structure of the java project?
My question is the following, can I by relative way link my . JSP to a library within the project directory? Or only in the server directory: Webapps, etc? At the moment, when I want to show an…
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answers399
viewspass javascript variable to a php variable
Good morning, everyone, I’m having a question: i have a select that takes the one array from the database, and every time the user changes the select it has a change in javascript that update it in…
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answer202
viewsProblem when displaying image between html tags
I’m trying to display in a template images that are saved in a database, the insertion and the search of the image are done correctly, the display also, however to some extent, because when I try to…
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answer126
viewsI cannot receive the values of a PHP form via POST
I’m having a problem in a php form that I don’t know how to fix. I have a file called login.php that contains a form that sends the data via POST to the.php data file. In the.php data I do the…
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answer61
viewsSynchronization Java Web Method
I have a web application selling school canteen product, this process is accessed by several users simultaneously.. I have a method that updates and validates if quantity is available.. I need this…
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answer47
viewsSingle React "key" problem
I am trying to create a chess game using React. I am doing very well except for this mistake. This is my code: import "./style.css"; function App() { const squares = []; //squares order for (var…
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answers1332
viewsTransfer files. class to the /web-inf folder in Eclipse
I’m developing a web project for a final college job. When creating . jsp files for the application, it gives error because it does not find the class of Servlet. The classes and the files . class…
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answers171
viewsUsing bootstrap and apache Tiles
I will start using Spring MVC to create my pages but have some questions: Using Apache Tiles to create templates and using Bootstrap(CSS Framework) to style pages is advantageous, or is it better to…
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answers1131
viewsGenexus X Ev3 and Tomcat error 7.0.54
I’m using Genexus X Ev3 to generate a web application with Java and I am using SDK 7 Update 55. I recently upgraded my Tomcat to version 7.0.54 and I started having the following error in the Tomcat…
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answer200
viewsHow to find unused files in a project?
We have a web project that has changed the layout several times and many files will no longer be used. However, since there are several developers using files at the same time, the old files were…
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answer248
viewsFloodfill with primefaces. Catch coordinate of click on p:graphicImage
I want to make an image painting application using java. As it is for the web environment I chose primefaces as a framework for the vast documentation that exists about it. However I did not find…
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answer292
viewsHow to get location coordinates in offline mode
As far as I know, coordinates, latitude and longitude depend on GPS hardware and not necessarily on Internet connection or data. There is a way to get this data through a browser (web app) on a…
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answer164
viewsGenerate offline Rails application
I have a very simple Rails application, with only one controller and two actions. Basically it’s pages with images, css, and some Java. I would like to generate a version of this application that…
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answer150
viewsReplication Mysql Database
I am drafting an online project and I need to ask a question regarding the creation of the database. I will have a database COMPANIES containing the reference with name and a code. From this…
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answer144
viewsPaypal IPN for recurring cancellation payment
I got the following code from Paypal’s git hub. I am making recurring payments and would like to receive notification in the system when there is cancellation. Thus, I could block the provision of…
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answer263
viewsFailed to create a site in iis 8
I am trying to publish my application on a windows server 2012 and IIS 8. I have deployed the files to the appropriate folder. In IIS, when creating a new website and testing the connection, I get…
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answer2947
viewsError: package javax.Servlet does not exist import javax.servlet. *
I created the directories correctly, copied the code and now does not compile and returns this error. I am compiling by the terminal using javac. http://pastebin.com/WLaGQit3 package…
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answer640
viewsDates with JSON /Highcharts
I have a problem with dates while plotting a Highcharts chart using JSON object. Data referring to date information is being displayed as follows: The Server sends JSON as follows to the client:…
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answers55
viewsWhy is my site slow?
Good afternoon, I’m detecting extreme slowdowns on my website right at page startup. As shown in this image, there is a very long wait before the rest of the content starts uploading. I loaded this…
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answers127
viewsHow to use JSF and Spring Boot Starter JDBC in the same project?
I saw a video about the Spring Boot Starter JDBC and would like to use it in a web application with JSF. Does anyone know if it is possible and how to proceed to make the configuration?…
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answer436
viewsCan’t connect to Mysql server on 'IP (4)
I have two servers with different purposes, one being a webserver running apache and php 5.3, and the other is a Mysql database server. The first uses the database in the second 24 hours a day, 7…
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answers338
viewsASPNET Application does not send emails
I have an application that has a screen with sending emails, This application works 100% on a virtual server (MANWEB10), including sending emails. When exporting to this new server (MANWEB01) the…
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answer156
viewsNull Pointer in Part filetype when upload
I have a purpose using the javax.servlet.http.Part. It is coming null when I upload. XHTML of the test <?xml version="1.0" encoding="UTF-8"?> <html xmlns="http://www.w3.org/1999/xhtml"…
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answer51
viewsTool to calculate performance and/or power consumption on a mobile device
Hello, I’m on a project that I need to develop some web apps for a mobile device. It’s for the Android platform. And I would like a tool that gives me the performance of this application and/or that…
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answer1083
viewsInserting Image in Database with Java Web
I’m having trouble inserting an image into a database. I already have a saving method and I’m including a photo field, but I’m not sure how to implement to upload the image. Whoever can help me,…
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answers138
viewsError of Session in Java
I have the following methods : public void delete(Class c, int id) throws SQLException { Session session = sessionFactory.openSession(); Transaction tx = session.beginTransaction(); try{ Object ob =…
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answer19
viewsMessage in Google Webmasters Tools - Changes to sitelinks for http://meusite.com.br
Someone knows what this message means in Google Webmasters Tools, I’m receiving it direct. All I know is it’s something to do with Sitelinks, I believe it’s some fault or error. A verified user has…
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answer2508
viewsHow to open a WEB image on a Timage in Delphi?
I’m trying to open an image that’s on a site of mine, I can’t use Twebbeowser because it has a vertical scrollbar that I can’t remove, so I only have Timage.
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answer52
viewsPage/website manipulation, Windows Phone Silverlight C#?
I see several apps on Windows Phone, which manipulate a site, are usually apps of the sites themselves, such as Tecmundo. It captures elements of the site and adds within the elements of the app,…
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answer1756
viewsPOST and GET methods in C#
I would like to know if you have any library or any third party component that do the POST and GET on the websites. I need to navigate some sites but I can not do GET nor on the home page of a…
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answers1817
viewsIs there any way to write code for the web without a python framework?
I find python a very interesting language. And as I develop for web, I would like to use it for this purpose. I know there are good frameworks like Flask and Django. But if I wanted to write small…
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answer759
viewsCan you change the value of a querystring parameter in javascript?
For example I have this querystring www.meusite.com.br?parametro=1. I wanted to exchange the value 1 for another value when a given function is called, without having to load the page again (if…
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answer107
viewsOffline Web application server and client application takes position
I wonder if there’s a way for a client application to take over when the server is down, like a Dropbox, for example, you can put a file, or a directory inside the folders that are synced through…
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answer762
viewsIs PHP client side feasible?
I develop in PHP and, I would love to do everything only in PHP on dynamic programming issues, but, I know that to do everything I need facing "web" impossible would be without a language client…
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answer38
viewsWordpress Translation Plugin
Eai guys, well the company ta wanting to translate the site to English and they use Wordpress. The idea is to have a UK flag that when clicking leaves the whole page in English. (Obvio hahaha). I…
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answers40
viewsDoubt when overwriting attribute with Apache Tiles
I am studying a little about Tiles and I have a question. I have the following definition: <definition name="main" template="/views/templates/main.jsp"> <put-attribute name="titulo"…
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answers51
viewsConcept - Dynamic web menu
I am idealizing a personal project and I am in doubt about best practices. For a WEB system with access control, which of the following options, in your opinion, is the most ideal? 1 - Assemble a…
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answer199
viewsMask in image
I am trying to apply a "mask" to my image, to take only the center of it and apply 50px for 52px, tried to use the clip-path but it doesn’t work, I’m using the opera and the Chrome for testing,…
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answer114
viewsCustomer side image manipulation
A challenge has arisen, I need to know how/which tools can help me create an area that I can manipulate image on the client side. I need to develop a website that creates custom shirts, something…
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answer144
viewsQuestions about website hosting
Well, I’m new to basically everything in this area, I spent almost 2 months learning and programming my site completely, trying to solve problems, organize and optimize it to the maximum, but as I’m…
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answer699
viewsIs it possible to manipulate http request header?
This is a requisition http, it is possible to perform header manipulation of the request? Or is it only possible to make such a manipulation in the response? If possible, in which languages with…
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answer123
viewsDoes anyone know how to enable PDF export functionality in Datatables
I’m using the js Datatables plugin but don’t know how to activate the export functionality to PDF or Excel. Can anyone help me? From now on agardeço, att.
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answer59
viewsNotifier of any event that the user performs in the system
I am using the Spring Framework for java and would like to create can create a kind of warning, <scan>, which shows in the table that a new line has been added (this line comes from the…
java web-application jsp spring-mvc spring-securityasked 8 years, 10 months ago Vinicius Duarte 115 -
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answers32
viewsError "io is not defined" socket.io
Guys, this error is happening to me when using the socket.io: "io is not defined". Already link the CDN socket.io and locally; I’ve used and "disfigured" the Express and nothing. The interesting…