Wikipedia API: how to parse content text into JSON? - json

Question

EDIT
Not sure what to do because I realized the question I originally asked was irrelevant to what I really wanted, because I thought the descriptionurl and shortdescriptionurl from a Wikipedia API query of an image file would return text that described the image, but really they're just descriptions of the URL, so I feel dumb about that.
I tried to delete the question but it wouldn't let me, because there's already an answer.
So I'm going to change the question to what I really want to know, but now the answer that already exists will not make any sense, so this is kind of a mess but I don't know what to do about it.
What I actually wanted to know
When I do this:
https://en.wikipedia.org/w/api.php?action=query&pageids=18306940&prop=revisions&formatversion=2&rvprop=content
I get this:
{
"batchcomplete": true,
"query": {
"pages": [
{
"pageid": 18306940,
"ns": 6,
"title": "File:Rot-Weiss Essen Fans, May 2008.jpg",
"revisions": [
{
"contentformat": "text/x-wiki",
"contentmodel": "wikitext",
"content": "== Summary ==\n{{Information\n|Description=Fans of Rot-Weiss Essen are celebrating a 1-0 away victory against 1. FC Magdeburg in the 2007/08 Regionalliga Nord.\n|Source=I created this work entirely by myself.\n|Date=May 24, 2008\n|Author=[[User:Povldr|Povldr]] ([[User talk:Povldr|talk]])\n|other_versions=\n}}\n== Licensing: ==\n{{self|cc-by-sa-3.0|GFDL}}\n\n{{Copy to Wikimedia Commons|bot=Fbot|priority=true}}"
}
]
}
]
}
}
What I'd like to do is have the query return only these parts of the content:
Fans of Rot-Weiss Essen are celebrating a 1-0 away victory against 1. FC Magdeburg in the 2007/08 Regionalliga Nord. (the Description)
May 24, 2008 (the Date)
Poldvr (the Author)
I could just get all that out of the content string by chopping up the string in C#, but is there any way to get it spit back to me formatted as nice little JSON in the first place?
I haven't been able to figure this out from The Wikipedia API page on the parse action, nor from the Wikipedia API Sandbox.
Can it be done?
Here is the old question, which was asking the wrong thing
title was: Wikipedia API: how do I use descriptionurl and shortdescriptionurl?
When I do this, for example:
https://en.wikipedia.org/w/api.php?action=query&list=allimages&aiprop=url&date&format=json&ailimit=1&aifrom=rot
...one of the pieces of JSON info is called "descriptionurl," and another is "shortdescriptionurl."
When I type those urls into a browser, it just takes me to the image's entire page.
How do I use those urls to get just the text of the actual description and short description?
Oh, and before you just type the link to the Wikipedia API, I have been trying to find out this information on there and failing. It's full of general information but I can't find this specific thing.

Answer 1

When I put your URL in a browser, I get some nice JSON as expected:
{
"warnings": {
"main": {
"*": "Unrecognized parameter: date."
}
},
"batchcomplete": "",
"continue": {
"aicontinue": "Rot-Weiss_Essen_logo.svg",
"continue": "-||"
},
"query": {
"allimages": [{
"name": "Rot-Weiss_Essen_Fans,_May_2008.jpg",
"url": "https://upload.wikimedia.org/wikipedia/en/5/5c/Rot-Weiss_Essen_Fans%2C_May_2008.jpg",
"descriptionurl": "https://en.wikipedia.org/wiki/File:Rot-Weiss_Essen_Fans,_May_2008.jpg",
"descriptionshorturl": "https://en.wikipedia.org/w/index.php?curid=18306940",
"ns": 6,
"title": "File:Rot-Weiss Essen Fans, May 2008.jpg"
}]
}
}
To extract an individual entry, you'll need to parse the JSON with your programming language of choice.