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I was searching for something, and found a document on a website. It is showing it using the Flash Player. When I wanted to save a copy by clicking "Download this document", it says needs to register, and registration is for free.
So I entered my email address and a simple password to register. And then it showed: needs US$0.30 to buy this document and download it.
Besides feeling a little bit cheated, I wondered, is there a way to save the document as a txt or pdf if it is being shown by the Flash player?
you can get those documents at docin and doc88 from http://www.google.com/search?hl=en&q=%22%E4%B8%80%E6%B4%BE%E7%9B%B8%E4%BF%A1%E6%89%8B%E6%AE%B5%22&btnG=Search&aq=f&aqi=&oq= you can see the PDF on the website. The difficult thing is to download them using Firebug and then be able to show them locally.
– nonopolarity – 2010-02-04T08:08:02.060Okay. The encryption that docin.com uses is absolutely unknown to me, but I determined that doc88.com probably uses software from http://cryptbot.com, through I was unable to extract the key: it's probably buried deep into the flash viewer.
– whitequark – 2010-02-04T19:22:20.763Tag along to this comment thread. For those of up working with docin/doc88 files, is there any solution to get these into PDF? – William Entriken – 2012-09-18T15:49:11.893
it really does work. Now I have a 2.2MB file, but the only catch is that it is not openable by Adobe Acrobat and if I rename it as .txt and open it with Firefox, and try UTF-8 or Big5 or GB, or UTF-16, no meaningful text will show. So I suspect it actually does some encryption. For example, it can just XOR each byte with some constant to encrypt it, and it will be too troublesome to try and decrypt it. For example, maybe it XOR with a number for byte 1, 3, 5, 7, 9 and XOR with a different number for byte 2, 4, 6, 8, 10... and it is really to troublesome to find out – nonopolarity – 2010-01-20T19:06:21.507
I think this is simply not PDF or plaintext. Humanity created thousands of formats, and not all of them are readable by Adobe Reader... Can you post somewhere first 64 bytes of this file, maybe as a hex dump so a 'magic number' check can be done? (Magic numbers are special combinations of bytes that can be used to almost exactly identify file format). – whitequark – 2010-01-20T19:26:19.607