Posts tagged "webdevelopment"
Icon Missing When Adding a Webpage to the Android Homepage
Problem: when adding a shortcut of a webpage to the Android home screen, Chrome used <link rel="icon" ...> to give this shortcut an icon. Lately Google Chrome broke this feature (intentionally probably). Chrome just shows a grey round circle with a single letter instead of the provided icon. Discussion: Google remov...
Chrome Refuses to Connect to Old Devices
Problem: Chrome shows an error message like "NET::ERR_SSL_OBSOLETE_VERSION" when connecting to an old device. This might be an old network device or printer or KVM switch oder DRAC/RemoteInside port of servers. Discussion: since Chrome ~98 Google decided that you are not allowed to connect devices that use TLS1.1 an...
Chrome Won't Let You Proceed to Website with Invalid Certificate
As an IT professional it's quite common that have to connect web servers with invalid certificates, for different reasons. For expample opening a management GUI of an appliance may be necessary to change its own certificate or TLS settings. Problem: sometimes chrome won't let you open this website, and gives you no ...
Greenlock(-express) Letsencrypt Fails with ECONNRESET
Problem: after upgrading vom greenlock-express v2.0 to v2.5 and switching from acme-v1 to acme-v2 every attempt to register a new TLS cert with Letsencrypt fails with "ECONNRESET" Discussion: the new version of greenlock tries to validate the .well-known/acme-challenge file before asking letsencrypt for the certific...
Akamai High Traffic Volume
Problem: Akamai is showing very high edge traffic volume, but other sources of accounting show less traffic, and Akamai is billing this high volume! Discussion : I activated log shipping to compare the volume of the shipped data, to the reported volume by Akamai. The difference was +66% in the Akamai volume. Support...
Chrome Destroys URLs in the Location Line
Problem: current Chrome browsers cut URl parts and hide the correct URL. https://www.derstandard.at/ is shown as derstandard.at. This is simply wrong from the technical point of view. And it might even be dangerous for some URLs form a security standpoint. Solution: there is an option to disable this bug: chrome://f...
Debugging Akamai
Akamai just works, ... most of the time. But sometimes you have to check what's going on, and Akamai gives you a handy tool for this. There is an HTTP request header that tells Akamai to respond with some internal information. Pragma: akamai-x-cache-on, akamai-x-cache-remote-on, akamai-x-check-cacheable, akamai-x-ge...
Web Audio Silence
Problem: I had problems with an audio driver (no not on Linux). The sound started with a delay after every gap of silence. This bug cuts off about 1/2 of a second of the attack of the sound. This is a problem when you try to make music in particular. Workarround: I made a little webpage that plays "Total Silence" or...
Google Maps Marker on Mobile
Problem: A responsive webapp shows a google map with markers that are clickable. On desktop everything works as expected, but on mobile the markers are not clickable. Discussion: After debugging with chrome remote inspector, I found that a div->frame with opacity:0 was lying above (explicit z-index:2) the clickable ...
Google Map from RSS Feed
Problem: Google had a nice feature to build google maps from rss geo information with a simple iframe tag, but this service is discontinued . <iframe width="920" height="450" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://maps.google.com/?q=http:%2F%2Ftothepin.blogspot.com%2Ffeeds%2Fpos...