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You can't download this image

youcantdownloadthisimage.online

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Re: You can't download this image

#41

Post by hdjjhhvvhga »

shrx wrote: post #24
dobladov wrote: post #11

Earlier quoted context omitted.

Increase the time a bit, it looks like sometimes it takes more time to download curl --max-time 2 https://youcantdownloadthisimage.online/lisa.jpg > lisa.jpg

Nevermind, looks like MobaXterm shell provides a non-standard curl implementation: $ which curl curl: aliased to _tob curl After installing curl with apt-get it works.

I hate it when people do that. You can wonder for hours why something obvious doesn't work as it should and in the end discover someone decided to implement something substandard, often for no good reason.

Re: You can't download this image

#42

Post by can16358p »

masswerk wrote: post #6
dvh wrote: post #5

If I wanted a non-downloadable image I would make it from 1px wide/tall colored divs.

I actually used this to generate graphs in JS/HTML in the 1990s. :-)

Out of curiosity, how was the performance (of course normalized to performance of that era)?

Re: You can't download this image

#43

Post by forgotmypw17 »

causi wrote: post #28

When you usually try to download an image, your browser opens a connection to the server and sends a GET request asking for the image. I'm not a web designer, but that seems rather ass-backwards. I'm already looking at the image, therefore the image is already residing either in my cache or in my RAM. Why it is downloaded a second time instead of just being copied onto my drive?

This used to be common behavior, but changed over time in most browsers.

Your guess is as good as mine as to why.

Re: You can't download this image

#44

Post by causi »

paavohtl wrote: post #36
causi wrote: post #28

When you usually try to download an image, your browser opens a connection to the server and sends a GET request asking for the image. I'm not a web designer, but that seems rather ass-backwards. I'm already looking at the image, therefore the image is already residing either in my cache or in my RAM. Why it is downloaded a second time instead of just being copied onto my drive?

I don't know about browser internals, but I would guess that the browser decodes the image once into a format that can be shown on the page (so from PNG/JPG/WEBP into a RGBA buffer) and then discards the original file. This saves a bit of memory in 99.99% of cases when the image is not immediately saved afterwards.

Interesting if that is the explanation. I wonder if any browsers offer a "privacy mode" where the original images are saved, thereby preventing the server from knowing which specific images you chose to save and were therefore interested in. I wonder how often that information is logged, and whether those logs, if they exist, have ever been put to a purpose such as in a court case.

Re: You can't download this image

#45

Post by sildur »

kuroguro wrote: post #22

The problem with leaving connections open is that there's a limit on how many you can have on the server... I think the author has committed self-DoS :) https://en.wikipedia.org/wiki/Slowloris_(computer_security)

And now you can't download that image.

Re: You can't download this image

#46

Post by masswerk »

causi wrote: post #28

When you usually try to download an image, your browser opens a connection to the server and sends a GET request asking for the image. I'm not a web designer, but that seems rather ass-backwards. I'm already looking at the image, therefore the image is already residing either in my cache or in my RAM. Why it is downloaded a second time instead of just being copied onto my drive?

As far as I remember from a previous project from a few years ago, the browser doesn't include a referrer for the download request, which can be used for a distinction. (You'll have to disable caching and E-Tags for this to work.)

However, this is easily defeated by the use of the console: Select the sources tab, locate the image and simply drag-and-drop the image from there, which will use the local cache instance for the source. Works also with this site, at least with Safari.

Re: You can't download this image

#47

Post by proyb2 »

titaniczero wrote: post #31
kuroguro wrote: post #22

The problem with leaving connections open is that there's a limit on how many you can have on the server... I think the author has committed self-DoS :) https://en.wikipedia.org/wiki/Slowloris_(computer_security)

The website is down now lol

It should be ends with .offline
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