800px-Parcelusarus2008

WooCommerce Shipping Plugin “External Fetch”

I just wrote the following shipping plugin for WooCommerce because existing plugins would not cover the case I’m working at. It is available on my github account under the permissive MIT license. https://github.com/michaelfranzl/woocommerce-shipping-external-fetch woocommerce-shipping-external-fetch Shipping Plugin for WooCommerce which HTTP PUTs the cart contents in JSON format to an external web service specified by protocol/host/port/URI, and […]

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How to compile ezstream from source

Debian Stretch’s version of ezstream is currently a bit out of date. Here is how you compile ezstream from source to get the latest improvements and bugfixes. Not even the INSTALL file in the ezstream repo has all the steps:

Note that the configuration file structure has changed from what can be found on older blog […]

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Boot your Raspberry Pi from nothing but an Ethernet cable

Zero Client: Boot kernel and root filesystem from network with a Raspberry Pi2 or Pi3

A Zero Client is a computer that has nothing on its permanent storage but a bootloader. Rather, it loads everything from the network. With the method presented in this article, you will be able to boot a Raspberry Pi into a full Debian OS with nothing more on the SD card other than the Raspberry firmware […]

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Turning a Raspberry Pi into a Gateway to mobile internet (Image license CC BY-SA 3.0)

How to turn the Raspberry Pi into a Gateway to mobile phone internet

Your DSL internet connection is too slow? Want to set up an improvised office? You do not want to pay for a DSL internet plan when you already have a fast 4G mobile plan? If yes to one of the above, it is quite easy to configure a Raspberry Pi to share one mobile internet connection to an […]

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Hardening WordPress against hacking attempts

The WordPress Codex states: Security in WordPress is taken very seriously This may be the case, but in reality, you yourself have to take some additional measures so that you won’t have a false sense of security. With the default settings of WordPress and PHP, the minute you host Wordpress and give access to one non-security-conscientious administrative user, your […]

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no.php – Transparent reverse proxy written in PHP that allows you to not have to write PHP any more

This little project will probably be my only contribution to the world of PHP. The code is at https://github.com/michaelfranzl/no.php This short, single-file, 80-line PHP script is a simple and fully transparent HTTP(S) reverse proxy written in PHP that allows you to never have to use PHP again for a new project, if you feel so […]

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Plot of apparent diameter of Jupiter for the time period 2017-2026

Apparent diameter plot for Jupiter 2017-2026

The apparent diameter of Jupiter varies with the Earth-Jupiter distance. Depending on the distance, the apparent angular diameter of Jupiter is between approx. 0.5 and 0.8 arcminutes. For best astrophotography results, one should pick a time when Jupiter is closest. Similar to my plot of the apparent size of Venus, I wrote a short program to plot Jupiter’s apparent diameter for the […]

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Plot of the apparent diameter of the Moon for the time period 2017-2018

Apparent diameter plot for the Moon 2017-2018

The apparent diameter of the Moon varies with the Earth-Moon distance. Depending on the distance, the apparent angular diameter of the Moon is between 29.4 and 33.5 arcminutes. For best astrophotography results, one should pick a time when the moon is closest. Similar to my plot of the apparent size of Venus, I wrote a short program to plot the Moon’s […]

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