Welcome to TechScreen

Welcome to the TechScreen site. This side shall support the exchange of knowledge in the domain of Web Engineering and related aspects. As a side effect, this side is used for research on knowledge management technologies. User can pose challenges in the problem domain and can participate in quizzes. Further a bibliography about arcticles in different related domains is continously extended. Finally, questionnaires on different issues are provided. To be able to participate you need an account and a password from TU Wien's TISS system.

How can you filter the visibilty of entries in a view based on the users role?

During the exerciese solution, we came to the point, where we wanted to implement "[...] a view where your instances are listed and [...] where different user groups see different content because the groups have different privileges.". After a long search, we discovered that there is a module called "View Published Or Rols", which allows to add user information like a user type to the filter value.

Remove answers

I mistakenly added my comments as answers instead of as a comment to the answers. Is there a way I can remove my answers? So I can change them to comments instead. Thank you!

Change rating stars in TechScreen

I just wanted to rate the relevance of a post with 3 stars, but it only shows one. Unfortunately I can not change this, does anyone know if I can change the false rating? I would also like to know if I can change a comment after it has been posted. Thanks in advance!

How to design a forward compatible REST API

I am developing a REST interface that is supposed be used by different clients. Clients as well as the server are maintained by the same team and users are expected to update their clients within some reasonable time frame. Backwards compatibility is therefore not much of an issue. I am however unsure how to plan for upcoming changes.

Migration from Gitlab zu Github

I have to migrate my code repositories form Gitlab on premise to Github Cloud. The built in migration function from Github does not work because Gitlab on premise is not reachable from outside. Furthermore my Jenkins Buildserver must be able to fetch the code from Github. How can I solve that?

Online Gaming without Servers

Because of the current lockdown situation my friends and me decided to spend this time with playing computer games together. The problem is that we choose a very old game where no servers are running any more and we can not play it via LAN mode because of the current restrictions from the government. Is there a way how we can play together.

Change download path of Firefox Driver

I am writing some automated tests using the Java based Selenium Firefox driver. In one of my tests I have to download and verify a PDF file. But the Firefox Driver downloads the file in the default download folder. I want to download the file in a different folder. Is it possible to change the location where the file should be downloaded?

Analyze the evolution of COVID-19 topics

For a practical university project I would like to analyze the evolution of COVID-19 topics (such as Corona-Crisis) based on social media data.

Missing Data while reading data from database

Our team uses Apache NiFi to offload data from source database transform it and send it to our stakeholders with Apache Kafka. Recently Swiss Regulators as one of our stakeholders claimed that there were missing records for some customers.

Background Downloading a >4GB zip on an iOS tablet with small memory

Since iOS has a standard download functionality that basically every app uses we decided to also go with that way. The standard functionality had an integrated background mode which we wanted to make use of. When using the background mode it was not possible to stop the download. We were able to stop it in our UI so that the user could work again but it was still downloaded in the background of the app. After the download finished the download abortion was triggered and the downloaded content was deleted.


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