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You can't download this image

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Re: You can't download this image

#182

In Chrome, you can just do as the author says, right click and "Save Image As". Then just go to the folder where it is being downloaded, and copy/paste the file "lisa.jpeg.crdownload" to "lisa.jpeg.crdownload copy". Rename to "lisa.jpeg" and cancel the download. You now have the image. What's interesting is that you ARE actually downloading this image. It's just that they don't terminate the connection.

Or, as an alternative, use wget and then press Ctrl+C after two seconds. Viola, you have a usable lisa.jpg.

Re: You can't download this image

#183
This one is pretty easy but a friend recently showed me one (gallery of some sort) I couldn't figure out quickly which was downloading chunks in nonstandard ways and piecing them together with uglified js.

Re: You can't download this image

#184

This is a perfect (if maybe unintentional) example of how to get help from otherwise disinterested technical folk: Make an obviously technically-incorrect claim as fact, and watch as an entire army comes out of the woodwork giving you technical evaluations :)

[deleted]

Re: You can't download this image

#185
post #180

In Chromium based browsers the quickest method I've found is "right click -> Inspect" the image then click the sources tab in the dev tools window. From here you can drag or save the image shown without issue. My guess as to why this works is the sources view seems to pull from the loaded content of the page rather than fetch the content based on the lack of packets trying this with a packet capture running.

In Firefox, beside that, you can press Ctrl + I, open the "Media" tab, and pick any of the graphics that were already downloaded to display the page. Then you can save the picture(s) you're interested in. I suppose the source of it is the local cache. Does not work in this particular case, of course, because the whole image is not yet in the cache.

It also works in this case, too: at some point the connection does close (if it doesn't, just hit escape) and you can save the image as usual, now from the cache.

Re: You can't download this image

#187

Earlier quoted context omitted.

1000… pft.. just holding open a connection and sending on average a few bytes a second hardly costs anything and the memory requirements on eg Linux are minimal. You can easily do 100k or more with python and a few hundred megs of memory. Millions are doable with something a little less memory hungry or throwing more memory at it.

Most programmers these days don't know what computers are capable of.

In fairness to them, a lot of programmers didn't come up the way (we presumably) did - if you started using computers/programming in the 80's and building computers in the 90's your worldview is going to be fundamentally different to someone who started in 2018.

We came from a world where bytes mattered they come from a world where Gigabytes matter.

In some ways caring about that stuff can be detrimental, at the back of my mind there is always that little niggle - you could do this in 1/10th the runtime/memory cost but it'll take twice as long to write and you'll be the only one who understands it.

These days we don't optimise for the machine but instead for the human time and honestly, that's an acceptable trade off in many (but not all) cases.

It can be frustrating when you remember how much of an upgrade getting a 286 was over what you had, that I now routinely throw thousands of those (in equivalence) at a problem inefficiently and still get it done in under a second.

Re: You can't download this image

#188
post #180

In Chromium based browsers the quickest method I've found is "right click -> Inspect" the image then click the sources tab in the dev tools window. From here you can drag or save the image shown without issue. My guess as to why this works is the sources view seems to pull from the loaded content of the page rather than fetch the content based on the lack of packets trying this with a packet capture running.

In Firefox, beside that, you can press Ctrl + I, open the "Media" tab, and pick any of the graphics that were already downloaded to display the page. Then you can save the picture(s) you're interested in. I suppose the source of it is the local cache. Does not work in this particular case, of course, because the whole image is not yet in the cache.

[deleted]

Re: You can't download this image

#189

In Chrome, you can just do as the author says, right click and "Save Image As". Then just go to the folder where it is being downloaded, and copy/paste the file "lisa.jpeg.crdownload" to "lisa.jpeg.crdownload copy". Rename to "lisa.jpeg" and cancel the download. You now have the image. What's interesting is that you ARE actually downloading this image. It's just that they don't terminate the connection.

We have a security proxy at work that gives you the bits, but then holds the connection open while it does a scan, then resets the connection if it doesn't like something inside. Both Chrome and Firefox [haven't tried IE/Edge, but I assume that they'll do something that the proxy vendor would want] infer [or are told?] that the connection broke and delete the interim file. Unfortunately, with zip files, the header is…

Those controls on a proxy are to protect against the careless and the clueless. No competent security team will rely on them to prevent ingress/egress of data or malicious code by skilled individuals.
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