web-applications

Architecture of a microservice based web app

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You trouble is how model your microservices. In term of microservices the second approach is most appropriate, which expose its logic through API. Always when you model your microservices keep in mind the follow facts. Loose Coupling: When services are loosely coupled, a change to one service should not require a change to another. The … Read more

Keycloak public client and authorization

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As far as I understood, you have your frontend and backend applications separated. If your frontend is a static web-app and not being served by the same backend application (server), and your backend is a simple REST API – then you would have two Keycloak clients configured: public client for the frontend app. It would … Read more

How do I serve CSS and JS in Go

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http.Handle(“https://stackoverflow.com/”, http.FileServer(http.Dir(“css/”))) Would serve your css directory at /. Of course you can serve whichever directory at whatever path you choose. You probably want to make sure that the static path isn’t in the way of other paths and use something like this. http.Handle(“/static/”, http.StripPrefix(“/static/”, http.FileServer(http.Dir(“static”)))) Placing both your js and css in the directory … Read more

RESTful v/s MQ. Differences and other key features apart from Guaranteed Delivery

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One of the biggest differences is that REST implies synchronous processing while MQ is more often asynchronous. As you already mentioned, MQ is a way to decouple producer and consumer so that they don’t have to be online at the same time but the system would still be functioning as a whole. If your use … Read more

PathLocationStrategy vs HashLocationStrategy in web apps

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For me the main difference is that the PathLocationStrategy requires a configuration on the server side to all the paths configured in @RouteConfig to be redirected to the main HTML page of your Angular2 application. Otherwise you will have some 404 errors when trying to reload your application in the browser or try to access … Read more

How to use visual studio code to debug django

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For VSCode (full disclosure, I’m one of the VSCode developers) try installing the Python extension to get started. This documentation covers debugging Django. There should be a included debug configuration or you can add your own to the launch.json file: { “name”: “Django”, “type”: “python”, “request”: “launch”, “stopOnEntry”: false, “pythonPath”: “${config.python.pythonPath}”, “program”: “${workspaceRoot}/manage.py”, “args”: [ … Read more

Modular web apps

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You are very right in thinking there are synergies here, we have a modular web app where the app itself is assembled automatically from independent components (OSGi bundles) where each bundle contributes its own pages, resources, css and optionally javascript. We don’t use JSF (Spring MVC here) so I can’t comment on the added complexity … Read more

How do you virus scan a file being uploaded to your java webapp as it streams? [closed]

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Check out Clamv ( http://www.clamav.net/ ) It is a open source anti-virus, and you can scan a stream. So you do not need to save the file for scanning it. http://linux.die.net/man/1/clamscan Scan a data stream: cat testfile | clamscan – So it is quite easy, start the clamscan process with the – arg. write the … Read more

Initializing Log4J with Spring?

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You could configure your Log4j listener in the web.xml instead of the spring-context.xml <context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/classes/log4j.web.properties</param-value> </context-param> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener> So it is up before Spring starts.

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