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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answers970
viewsArduino Ethernet Shield and PHP
Hello I am developing a code for Arduino + ethernet that triggers GET (PHP) methods, and PHP sends the received data from Arduino to Mysql. The code in php works perfectly, the ethernet can connect…
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answers62
viewsTake database information and add in inputs
I’m developing a web system and I’m having a hard time finishing CRUD. The system is already saving my pacthpanel object, it has equipment registered to this patch. The information is being saved…
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answers1674
viewsWhat is the best way to store videos, audios, images, documents in a bank?
I want to create a repository system where people can store videos, audios, pdfs, images etc. I will probably use PGSQL and want to know what is the best strategy for storing this data that can be…
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answers270
viewsBest way to store images?
How best to store images? In a special directory, for example: public/images; In base64, on a data basis; Another way (which I did not quote earlier). And why? Note: I am using a Mongodb database.…
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answers181
viewsMulti tenancy springboot
How do spring keep tenantID present in all requests? I would like to point out that my idea for using multitenant would be as follows www.nomeDoSistema.com.br/nomeDaEmpresa/ and for each company…
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answer155
viewsConverting Word to bits - Javascript and Siemens CLP Webserver
I am receiving a PLC variable, which is a Word(16). However, I am not able to 'convert' this Word in 16 bits with their respective values (true or false). 1 Word = 16 bits. I get word with 'full…
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answer106
viewsHow to place how many hours ago the post was posted?
I have a website here that is pipocando problems more and more. It was done in ASP CLASSIC by another programmer and I’m more lost than anything else in this messy logic. The problem is this: the…
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answer291
viewsJquery - Select and deselect elements on the page
I have a screen with several Ivs that are draggable. However, I need that when the user clicks on them, it creates an edge around it and adds some options (delete, for example). But I want that when…
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answers177
viewsPass Session with Node.JS
Hi, I’m having a hard time with Session in an application with nodejs and angular 4. I’m doing it this way: By entering the email and password on the login screen and giving Ubmit in the login form,…
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answers118
viewsProblems with JSON + PHP
I have a file JSON which is being used to store settings, and a file php, which reads and fills the file according to the data reported, however after the settings are edited for many times the JSON…
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answer33
viewsShort does not recognize entire date
Hello, how do I make the short recognize the whole object { "Dir": "Sd:/", "List": [ { "Tipo": "P.O.S.-", "Data": "11/10/2017", "Hora": "23:58", "Size": "0", "Nome": "Arquivo1" }, { "Tipo":…
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answers617
viewsHow to organize JSON content
night! I need your help on the following question: I have 2 files . json, but when opening in Notepad++ I realize that the content is disorganized. Example: Arquivo1.json { "xxx.yyy.E-mail":…
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answers221
viewsI can’t initiate nodemon
I am trying to initialize a project with postgre access but it does not start when running the command. follows the error : Error: listen EADDRINUSE :::3000 at Object.exports._errnoException…
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answers534
viewsView data in PHP table
I am making a sales report and need to organize the data coming from a bank in Firebird make a report on PHP, however I am not getting know how many data are coming from the bank. Because the…
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answer83
viewsInsert data into db sql server
I’m having problems connecting my project to the database, I do not understand the reason, I’ve looked at several tutorials, use sql server 2017, I can access db in an application, but the site is…
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answer1830
viewsSite icon in Shortcut when adding site to mobile screen on Chrome has Android option
I have a responsive site that is widely used on mobile by customers, always indicate that the customer use Google Chrome, because it offers an option to create a site shortcut on mobile, only it…
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answer249
viewsServlet giving error 404
I’m trying to create a posting application, I started studying the Java Web now and every time I run Servlet on Apache 8 it appears a 404 error page. my life package app.web4.servlets; import…
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answer239
viewsIs it possible to use your phone camera in a Web App with React?
People need to develop a web app with React, "It’s not React Native", and it will be necessary to use the camera phone just to take a photo, is that possible with React? there are some lib for that?…
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answer54
viewsProblem with PHP FOREACH
My problem is that my foreach only works when returning in XML, comes with more than one value in the array, but when it comes only 1, it doesn’t work. The return in XML when comes more than 1 value…
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answers850
viewswebservice php+json
Hello! I would like help to integrate with webservice via url, for example: $list_result = '{"titulo": '. '[{"id":$id_primary}'. ']}'; $json = json_encode($list_result); //echo $json; //API Url $url…
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answer71
viewsText fields (textarea, text, etc.) do not show the mouse pointer or typed text
Good night, you guys! I am developing an environment for creating questionnaires and, at the time of collecting data on the questions, I have a form for each type of question, which is selected by a…
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answer68
viewsMagento Error 404
Good morning, I’m having a problem when active URL friendly on Magento. When for example access: MINHAURL/customer/account/login/ I get the following error Not Found The requested URL…
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answers734
viewsPass value of a variable from an html page to a php file
I am trying to control the brightness of an led using a Raspberry Pi3 and a web interface developed by me. I have a text area with two buttons, one that increases the value and another that…
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answers48
viewsI’m having trouble inserting data into a table with php
My form is like this: <form name="pedidooo" action="cadastrandoPedido.php" method="post" > <?php include './conex.php'; $query = ("SELECT * FROM conta"); $result =…
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answers62
viewsUse of Pseudo Classes in CSS
I know that pseudo classes are: :link, :visited, :hover and :active, but I would like to know if it has how to use the pseudo classes through class, id or inline. Sometimes I don’t want to use one…
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answer127
viewsUse of Pseudo-Class :link
I’m using Pseudo Class for links, I understand the concept and use of a:hover a:active and a:visited , but I can’t understand the a:link. What is the use of it? If possible I would like a practical…
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answer232
viewsDoes Contact Page work on Github Pages?
When designing a simple contact page prototype, I remembered that there is a possibility that the project will be hosted by Github servers. Example But I also remembered that hosting with Github…
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answers46
viewsHow to use senitize_sql_like together with ilike
I’m having trouble using the senitize_sql_like, along with the ilike. When I use it, the query is not returning the expected value, it follows the implementation used: scope :brand_name_by_content,…
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answer221
viewsPut Outline into HTML5 USEMAP
I want to put edge or Outline on the image map in HTML. I tried to use: map area{outline: 1} But it didn’t work!
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answer648
viewsHow to use Python Chatterbot in HTML page?
I’m developing a Chatbot in python, using the Chatterbot library. I wonder how I can "embed" this chatbot into an HTML page. I’m a beginner. Using USB Web Server Follows the code: # -*- coding:…
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answers104
viewsSending Servlet attributes to more than one JSP?
I have a Servlet that does the following: L_sessao.setAttribute("Login", usuario); response.sendRedirect("InicioCliente.jsp"); It sends the user name to the Homeclient.jsp page, on this page I can…
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answer918
viewsFlexbox Align-items does not work
I’m having a problem, I don’t quite understand the concept of Align-items in flexbox, I don’t know why it’s not working, follow code: <div style="display: flex; align-items: center;…
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answer63
viewsCould a Web system be considered as software?
The question is whether a web system could be considered software. What are the definitions of the web system? What are the definitions of software? And what is the threshold between them?
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answer47
viewserror using waitActivityIndicator, how to resolve?
I am making a connection via web api in my application, so it is not accepting the use of "waitActivityIndicator", indicates that it does not exist in the current context, below my code, someone…
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answer936
viewsImport data from an excel spreadsheet into the Epplus-database
Gentlemen, I have the following problem: I created the code below, I made some changes, however I cannot import my file. My application is in .NET, and the database is the Oracle Sql, and adapted…
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answers880
viewsJquery Ajax - Request problems every x seconds
I am developing a web application that I use ajax to request from time to time to find out if there has been a new update, but my code does not work perfectly. I’m new to jquery and I’m having…
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answer192
viewspass a select value to a php page without refreshing the page!
Good morning, guys I have an onchange event in a select, I wanted to take the value of select and send to a php page. $(document).on("change", "#doc_sel_clinic", function(){ var id = $(this).val();…
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answers343
viewsCGI is out of use, but what if I want to make a secure web system on an intranet?
I know there are many ways to create a secure web system with technologies like PHP. NET and etc, however these interpreted languages expose the code to curious when the system should be installed…
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answers47
viewsA3 and WEB certificates
Hello, I know you have some questions related to the theme, but I could not draw any conclusions (at least of those I read), finally it is possible to apply A3 digital certificates (for…
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answers681
viewsError: Trying to get a Property of non-object
I am running the following iteration and getting the error Trying to get Property of non-object, being the code: @if(isset($propostas)) @foreach($propostas as $p) <tr>…
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answers339
viewsReturn of a View List to the Controller - Asp.Net Core
I have a viewmodel called Profile, in this viewmodel there is a Itensprofile List property and a string - title. public class PerfilViewModel { [Key] [DisplayName("Código")] public int Id { get;…
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answer91
viewsMount PDF via website
I’m developing a project for a website, where it receives information via input and returns a PDF formatted with this information. I believe that one solution would be to develop a API passing the…
javascript html5 api web-service web-applicationasked 5 years, 6 months ago Adriano Henrique Santana 28 -
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answers132
viewsDo I really need to start from a main to run a Schedule in java?
I am developing a web application, and now I have reached a point where I will have a process running in parallel in my application(in background) every day at a time x. To test the process, I made…
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answers168
viewsDynamic redirection with CSS or SASS
I have a website, and I’m working on responsiveness on it. I have a mobile version, similar to a web app, in a specific directory within the project. Currently when the screen resolution is less…
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answer317
viewsIs it better to make a large request to the database or several small ones?
What is more recommended? I have a web system that on load of the ASPX page it feeds multiple controls with data from various tables of the database. It is better to do a search with a request…
database web-application server-clientasked 5 years, 4 months ago Luis Fernando Martinelli Ramos 23 -
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answer529
viewsOpen a browser and run a javascript directly on the console through another programming language
My question is this: Imagine the following scene. You open the browser, open the console and then put some javascript code there to perform some task. I wonder if it is possible to create a script…
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answers15
viewsdifference between Owl and rdf
I’m starting to study and work with semantic web and I’m a little confused about some terms. I would like to understand basically what the differences between the formats (technologies) Owl and rdf…
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answer87
viewsWhat is the best way to store data locally?
I need to develop a web system to run without a server, the system in question will only save client data and schedules. I would not like to use a database server, because it becomes annoying that…
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answer134
viewsError in Opencart purchase button
By clicking the buy button it does nothing, by the console appears the following error Error: Syntax error, unrecognized Expression: #product input[type='text'], #product input[type='Hidden'],…
php html web-application syntax-error opencartasked 6 years, 6 months ago Prime Proj Construções 11 -
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answers155
viewsHow to receive value per GET?
ola personal I am developing a job and I need to get a value by get in the url but I’m not getting if someone can help me and show my mistake I thank you: <?php…