One thing for sure, you will never be able to communicate with the local machine hardware without installing some special binaries (and run it with appropriate privileges) on the local machine. However, that doesn’t mean you necessary need to use an ActiveX component and stay stuck with Internet Explorer. Of course, you could also develop … Read more
You might find inspiration from ScreenshotMe. Basically you need different parts: something that takes the image out of the clipboard and uploads it to the web: this could be a java applet, flash or firefox extensions. Flash or Java would have the advantage of being cross browser then you use the <canvas> tag to display … Read more
see https://github.com/hyperledger/composer-sample-networks/blob/v0.16.x/packages/trade-network/test/trading.js#L21 but use FileSystemCardStore instead of MemoryCardStore – we have an issue on documentation for this right now – https://github.com/hyperledger/composer/issues/3088 the general flow is : Issue identity, businessNetworkConnection.issueIdentity(NS + ‘#’ + userData.id, userData.user); …. var userCard = new IdCard({…}); userCard.setCredentials(credentials); … Import Card: adminConnection.importCard(userCardName, userCard); …. .then(() => { // Connect to the business … Read more
Real life situation: placing bets on a betting website. Users would double click and get two bets placed. Not good! Javascript checks were not sufficient to prevent this. Solution: Create UUID/GUID hidden input in form using server-side scripting language that renders the form. On form submission immediately add this to a database table called UniqueSubmissions … Read more
Quote from the Spring reference doc: Upon initialization of a DispatcherServlet, Spring MVC looks for a file named [servlet-name]-servlet.xml in the WEB-INF directory of your web application and creates the beans defined there… Your servlet is called spring-dispatcher, so it looks for /WEB-INF/spring-dispatcher-servlet.xml. You need to have this servlet configuration, and define web related beans … Read more
What is web.xml file and what all things can I do with it ? The /WEB-INF/web.xml file is the Web Application Deployment Descriptor of your application. This file is an XML document that defines everything about your application that a server needs to know (except the context path, which is assigned by the Application Deployer … Read more
The issue of storing timestamps is simple: Store them in UTC. As for displaying them, it would make sense to take the device’s timezone setting and use that as the current timezone. That said, there should be a timezone dropdown next to the “time input” box, which defaults to the device’s current timezone, so the … Read more
This is totally personal and subjective, but I’d say that a website is defined by its content, while a web application is defined by its interaction with the user. That is, a website can plausibly consist of a static content repository that’s dealt out to all visitors, while a web application depends on interaction and … Read more
You can’t load the same native library twice. Put the class in a jar file under <tomcat>/lib/, it will be shared over all wars.
Below is a working example of desktop notifications for Chrome, Firefox, Opera and Safari, copied from Chrome desktop notification example. Try it live on JSBin. // request permission on page load document.addEventListener(‘DOMContentLoaded’, function () { if (Notification.permission !== “granted”) Notification.requestPermission(); }); function notifyMe() { if (!Notification) { alert(‘Desktop notifications not available in your browser. Try … Read more