Downloaded zip file is invalid

If your lost files were on an external storage device, connect it to your computer firstly. The software will start immediately a quick scan for deleted files, and later a deep scan will launch automatically to scan more lost files all over the selected drive. After the scan, you can use the Filter to quickly filter a specific file type. Double-click on a file allows for a full preview. Finally, select the desired files, click "Recover" and browse another safe location to save all the files at once.

Besides supporting the recovery of lost or corrupted Zip files, the professional file recovery software also enables you to perform USB recovery , hard drive recovery, external hard drive recovery , etc.

Here are two options that you can follow either one to make the ZIP files visible again:. Option 1. Open the folder that contains the hidden files, go to "View", and check "Hidden items". Option 2. If the ZIP files are on your computer or storage devices but you cannot open them with a decompression tool, stay calm.

Something is wrong with your ZIP files. You also have 3 methods to get rid of this issue, repairing corrupted or invalid ZIP files on your own:. Sorry, I ran the wrong test. The one where I added the bytes in question.

I'm caffeine deprived. I found out the problem. It's basically what you said, a new line in the beginning of the file, but it's subtler than a lost php tag. I was working on something else related to JSON responses, and I noticed on the chrome dev tool that the request response actually had a new line on the beginning! I had no clue why was that it didn't affect anything on the functionality as it was being parsed correctly, but that empty line puzzled me so I took a look on other sections of the page and to my surprise every single request contained a new line in the beginning, be it HTML, JSON, XML, even ZipStream.

I don't have a clue why, where and what is causing that new line but based on your comments, I believe that it's the cause of the problem. With that said, should I close this issue or do you plan on implementing a buffer clear and would like to keep track of this? I tried to implement a buffer clear, and it didn't work, the problem is that the only time I actually can do it, is when the constructor is called, after that the buffer may contain data belonging to ZipStream, so I can't risk clearing it before starting a new Zip entry.

The weird bit is that the problem isn't in the initial php file calling the ZipStream, as it would have resulted in an error from ZipStream. I can think of a potential solution, but it would require a variable to keep track, and it would be a hack that may not even solve the problem at hand.

A PHP file having an extra new line at the end is easy to miss. I'll keep it open for a few more days to see if I can come up with something. But finding your cause is important as well, as it may affect any binary files generated.

I am unable to open it using windows explorer. I can only open it using winrar. How come? That you get an error, and then can open the file in WinRar is because WinRar is actually a pretty awesome piece of software, as it can, to a point, figure out a Zip file, even if it contains errors.

Hi, Have you tried downloading other ZIP files from other sites? All of those might actually be corrupted. Do you have low drive space? Create a new folder then try downloading to it. WinRAR could be the issue. You might try disabling and then re-enabling the ZIP Folder. How satisfied are you with this reply?

Thanks for your feedback, it helps us improve the site. In reply to SpiritX's post on November 4, Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Who owns this outage? Can anyone explain what the problem here is? Please, add printStackTrace — esmoreno. No error is being thrown, I have tested this already. I would print out the response as text and look at the headers to see what's going on.

I would doublecheck on encoding UTF Add a comment. Active Oldest Votes. This should work out.