2
How do image previews/thumbnails work on Lemmy?
(lemmy.world)
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 20 Jun 2023
2 points (100.0% liked)
No Stupid Questions
35822 readers
404 users here now
No such thing. Ask away!
!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.
The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:
Rules (interactive)
Rule 1- All posts must be legitimate questions. All post titles must include a question.
All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.
Rule 2- Your question subject cannot be illegal or NSFW material.
Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.
Rule 3- Do not seek mental, medical and professional help here.
Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.
Rule 4- No self promotion or upvote-farming of any kind.
That's it.
Rule 5- No baiting or sealioning or promoting an agenda.
Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.
Rule 6- Regarding META posts and joke questions.
Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.
On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.
If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.
Rule 7- You can't intentionally annoy, mock, or harass other members.
If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.
Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.
Rule 8- All comments should try to stay relevant to their parent content.
Rule 9- Reposts from other platforms are not allowed.
Let everyone have their own content.
Rule 10- Majority of bots aren't allowed to participate here.
Credits
Our breathtaking icon was bestowed upon us by @Cevilia!
The greatest banner of all time: by @TheOneWithTheHair!
founded 1 year ago
MODERATORS
I'm not a lemmy dev, I just took a look at their repository
I believe it's the regex that detects if something is an image
A reddit image URL is :
in both cases it has ".jpg" (with the dot) in it so it passes the regex. It does not need to finish with it.
Whereas the image your provided does not have that in it.
You can instead download the image and post it like this, or similarly take a screenshot.
I believe that sort of website does this on purpose to make sure they don't waste server resources on other website that do not drive any ad revenue to them.
(if you're not a dev, I assume this is your face right now, sorry about this:
Thanks, your answer makes sense. Changing the regex so it does not need the '.' will lead to undesirable behaviour as links with hashes in them could randomly contain something like 'png'. Adding individual support for sites (like Twitter) might be a bad idea as it complicates things.
Interestingly, this Pixiv link ends on '.jpg' yet doesn't work still: https://i.pximg.net/img-master/img/2020/05/28/00/00/23/81902983_p0_master1200.jpg (src: https://www.pixiv.net/en/artworks/81902983) They might have some extra protection.
Pixiv does not allow direct linking to images as it uses an authentication token to fetch images, and this token is only sent if you view the image from the
pixiv.netsite. They don't have a "no token required reduced size preview" version of the image that is used to generate thumbnails. What @iraldir saw the second time is probably a cached version of the image as it always returns 403 when I requesti.pximg.netdirectly.