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#json

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Ross Spencer

File format building blocks: primitives in digital preservation


by @beet_keeper

A primitive in software development can be described as:

a fundamental data type or code that can be used to build more complex software programs or interfaces.

– via capterra.com/glossary/primitiv (also Wiki: language primitives)

Like bricks and mortar in the building industry, or oil and acrylic for a painter, a primitive helps a software developer to create increasingly more complex software, from your shell scripts, to entire digital preservation systems.

Primitives also help us to create file formats, as we’ve seen with the Eyeglass example I have presented previously, the file format is at its most fundamental level a representation of a data structure as a binary stream, that can be read out of the data structure onto disk, and likewise from disk to a data structure from code.

For the file format developer we have at our disposal all of the primitives that the software developer has, and like them, we also have “file formats” (as we tend to understand them in digital preservation terms) that serve as our primitives as well. 

Image of the foundations of a new building being erected in Wellington New Zealand, circa 2017.
Image shows a diagram of a simplistic view of the technology stack that goes into the creation of XML as a document (record)
Image shows four panels, each representing a stage in the making of a cake related back to data versus records. The data layer being the eggs and flour, the information layer the freshly made cake, the presentation layer the cake with icing on top, and the knowledge layer the cake has been eaten and can be fully understood and appreciated by its consumer.
#Archives#digipres#DigitalPreservation
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Gea-Suan Lin

ICANN 推動 RDAP 取代 WHOIS

Hacker News 上看到的消息，ICANN 要推動 RDAP，取代歷史相當久的 WHOIS：「Launching RDAP; sunsetting WHOIS (icann.org)」，看起來是年初一月的時候就公佈了，原文在「ICANN Update: Launching RDAP; Sunsetting WHOIS」。 WHOIS 的資料是沒有固定格式的 text，讓人讀還行，但讓機器讀會有蠻多困難；而 RDAP 會是 JSON 格式，這讓機器可以很容易取得資訊，也可以透過 client 自己組合出來讓人讀取。 協定的底層部分走的是 HTTP(S)，就直接走 port 80/443，對 firewall rule 通常是不用另外設定；WHOIS 走的 port 43 不算是平常會開的 port。 時程表目前只提到 gTLD 提供 RDAP 了…

blog.gslin.org/archives/2025/0

Gea-Suan Lin's BLOG · ICANN 推動 RDAP 取代 WHOISHacker News 上看到的消息，ICANN 要推動 RDAP，取代歷史相當久的 WHOIS：「Launching RDAP; sunsetting WHOIS (icann.org)」，看起來是年初一月的時候就公佈了，原文在「ICANN Update: Launching RDAP; Sunsetting WHOIS」。 WHOIS 的資料是沒有固定格式的 text，讓人讀還行，但讓機器讀會有蠻多困難；而 RDAP 會是 JSON 格式，這讓機器可以很容易取得資訊，也可以透過 client...
#format#icann#json
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UmWerker 🕊 ☮️ 🤘

I can't really complain about the functionality of my brain synapses. It's just that with languages, they don't work the way I want them to. This also applies to programming languages – unfortunately.

My upcoming project requires data output. Of course, I'm familiar with the combination of #PHP and #MySQL, without being able to create both of them. I'm concerned about the how, since I won't be using any of the common monsters (WordPress, Drupal, etc.). I've heard of #frameworks and read various things about them, but – this is where it gets embarrassing – I just don't understand how to use them. However, I have a feeling they can help me [1]. Does anyone have any ideas how I can overcome my lack of understanding? #Linux #Programming #Database #json

[1] For example, the recently discovered #Flight

docs.flightphp.com/de/v3/

docs.flightphp.comÜber - Flight - An extensible micro-framework for PHPFlight is a fast, simple, extensible framework for PHP. Flight enables you to quickly and easily build RESTful web applications.
Public
UmWerker 🕊 ☮️ 🤘

Ich kann mich wahrlich nicht über die Funktionalität meiner Gehirnsynapsen beschweren. Nur bei Sprachen wollen sie nicht so, wie ich es mir wünsche. Das gilt auch für Programmiersprachen – leider.

Für mein kommendes Projekt sollen Daten ausgegeben werden. Natürlich ist mir die Kombination #php und #mySQL bekannt, ohne beides selbst erstellen zu können. Mir geht es um das wie, da ich keines der verbreiteten Monster (Wordpress, Drupal usw.) einsetzen werde. Ich habe schon von #Frameworks gehört und diverses dazu gelesen, aber – jetzt wird es peinlich – ich kapiere einfach nicht, wie sie anzuwenden sind. Jedoch ahne ich, dass sie mir helfen können [1]. Hat jemand eine Idee, wie ich meine Begriffsstutzigkeit überwinden könnte? #Linux #Programmierung #Datenbank #json

[1] Z.B. das frisch entdeckte #Flight

docs.flightphp.com/de/v3/

docs.flightphp.comÜber - Flight - An extensible micro-framework for PHPFlight is a fast, simple, extensible framework for PHP. Flight enables you to quickly and easily build RESTful web applications.
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SpielmannSpiel

found, not really a bug, an interesting behavior in C# and @godotengine

When parsing JSON, an int gets parsed to a float. Which probably makes sense, since everything in JavaScript is a float anyways.
But that then breaks the ulong parsing with a wrong format. Don't know if this is a new 4.4 behavior or if it was always this way. In any case it took me a while to find this bug in my code.

#csharp #godot #gamedev #indiedev #Godot4 #programming #programmingtips #JavaScript #json

TL;DR: The image shows C# code in Godot reading a JSON response. A debug tooltip reveals the raw JSON string. Description: The screenshot captures a C# code snippet in the Godot engine, where an HTTP response is being read asynchronously. The line `string responseBody = await response.Content.ReadAsStringAsync(cancellationToken);` retrieves the response as a string. A debug tooltip displays the JSON content, showing keys such as `"hasError"`, `"switchOn"`, `"switchOff"`, `"total"`, and `"isSwitchOn"`. The `"total": 68` value is underlined in red, possibly indicating focus or debugging interest.
TL;DR: The image shows C# code in Godot, parsing a JSON response. A debug tooltip reveals parsed data. Description: The screenshot displays a C# code snippet inside the Godot game engine. The line of code parses a JSON string into a `Variant` type using `Json.ParseString(responseBody)`. A debug tooltip appears, showing the parsed JSON object containing keys like `"hasError"`, `"switchOn"`, `"switchOff"`, `"total"`, and `"isSwitchOn"`. The red underline highlights the `"total"` key. The code is likely debugging a game or application logic that involves switches or toggles.
TL;DR: The code attempts to parse a floating-point number as an `ulong`, causing a `System.FormatException`. Description: The image shows a debugging window in an IDE, evaluating an expression in C# within Godot. The expression tries to parse the `"total"` field from a `GodotDictionary` as an `ulong` using `ulong.Parse(data.AsGodotDictionary<string, string>()["total"])`. However, the value `"68.0"` is a floating-point number (with a decimal point), causing a `System.FormatException`. The error message indicates that the input string is not in the correct format for an unsigned long integer. The issue can be resolved by converting to `double` or `decimal` first, or by ensuring the value is an integer before parsing.
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