CODEWITHSUNDEEP
c#zip
user2726975
user2726975

Reputation: 1353

End of Central Directory record could not be found

I am downloading a zip file using c# program and I get the error 

at System.IO.Compression.ZipArchive.ReadEndOfCentralDirectory()
   at System.IO.Compression.ZipArchive.Init(Stream stream, ZipArchiveMode mode,
Boolean leaveOpen)
   at System.IO.Compression.ZipArchive..ctor(Stream stream, ZipArchiveMode mode,
 Boolean leaveOpen, Encoding entryNameEncoding)
   at System.IO.Compression.ZipFile.Open(String archiveFileName, ZipArchiveMode
mode, Encoding entryNameEncoding)
   at System.IO.Compression.ZipFile.ExtractToDirectory(String sourceArchiveFileN
ame, String destinationDirectoryName, Encoding entryNameEncoding)
   at System.IO.Compression.ZipFile.ExtractToDirectory(String sourceArchiveFileN
ame, String destinationDirectoryName)

Here's the program

    response = (HttpWebResponse)request.GetResponse();
    Stream ReceiveStream = response.GetResponseStream();
    byte[] buffer = new byte[1024];
    FileStream outFile = new FileStream(zipFilePath, FileMode.Create);
    int bytesRead;
    while ((bytesRead = ReceiveStream.Read(buffer, 0, buffer.Length)) != 0)
        outFile.Write(buffer, 0, bytesRead);
    outFile.Close();
    response.Close();
    try
    {
        ZipFile.ExtractToDirectory(zipFilePath, destnDirectoryName);
    }
    catch (Exception e)
    {
        Console.WriteLine(e.ToString());
        Console.ReadLine();
    }

I do not understand the error. Can anybody explain this Thanks MR

Upvotes: 73

Views: 205003

Answers (19)

Mark Jerzykowski
Mark Jerzykowski

Reputation: 982

In my case I had a password protected Excel file (.xlsx). Removed the password and exception went away!

Upvotes: 0

Astrid E.
Astrid E.

Reputation: 2872

The exception related to the stack trace is: (as also specified in this answer)

System.IO.InvalidDataException: End of Central Directory record could not be found.

In my case, the exception was thrown by the ZipArchive constructor when providing it with an input stream for an empty zip file.

I could verify that the zip file was empty by manually trying to extract its contents in the file explorer. The manual extraction was unsuccessful and provided a warning telling me that the zip file needed content before extraction.

Upvotes: 0

sgf
sgf

Reputation: 21

https://github.com/dotnet/runtime/pull/67332

There are many reasons for this problem, but in addition to the reasons listed in other answers, the most likely reason is that the underlying implementation of .net is not of high quality. It lacks support for some legal directory path symbols. For example paths with dots. Although it seems that the issue is officially partially resolved, so far I don't know if this commit completely solves the problem, and in which version the update will eventually be released. I personally currently use .net 6.0 desktop runtime, and this bug still exists.

But another possible problem is that maybe your path itself looks fine. But there are actually some problems. For example: somepath="\"\"" In this case, it is obvious that the path contains repeated double quotes. However, when debugging, you may accidentally overlook this problem.

Upvotes: 0

Lachezar Lalov
Lachezar Lalov

Reputation: 517

I also had this error because I was trying to open a .json file as a .zip archive:

using(ZipArchive archive = ZipFile.Open(fileToSend.FilePath, ZipArchiveMode.Read))
{ 
    ZipArchiveEntry entry = archive.GetEntry(fileToSend.FileName);
    using (StreamReader reader = new StreamReader(entry.Open(), Encoding.UTF8))
    {
        fileContent = reader.ReadToEnd();
    }
}

I was expecting that fileToSend.FilePath = "C:\MyProject\mydata.zip"

but it was actually fileToSend.FilePath = "C:\MyProject\mydata.json" and that was causing the error.

Upvotes: 2

mdimai666
mdimai666

Reputation: 787

My solution compress with powershell

Compress-Archive * -DestinationPath a.zip

Upvotes: 0

swanna
swanna

Reputation: 43

In my case, I was receiving this error in a combination with FileSystemWatcher, which triggered a processing method upon the zip archive before the archive was fully copied/created in its target folder.

I solved it with a check of whether the zip archive was truly eligible for reading in a try/catch block within a while loop.

Upvotes: 0

bendecko
bendecko

Reputation: 2783

Make sure it is a zip file you trying to decompress.

The web-service I querying zips results when there are two files, but in this instance it was just returning one. My code was saving the embedded base64 as a stream and therefore my code was assigning the zip extension.

Whereas it was already actually just a plain PDF...

Upvotes: 0

Achraf Amil
Achraf Amil

Reputation: 1375

In my case: I was mistakenly saving an input stream to *.zip.

While Archive Utility had no issues opening the file, all the rest failed (unzip cmd or java libs) with the same "end of central" error.

The plot-twist was: the file I'm downloading is in gzip format, i.e. *.gz, and not zip.

Upvotes: 0

JoelFan
JoelFan

Reputation: 38714

For me, the problem had to do with git settings.

To solve it, I added:

*.zip binary

to my .gitattributes file.

Then I downloaded an uncorrupted version of the file (without using git) and added a new commit updating the .zip file to the uncorrupted version and also updating the .gitattributes file.

I wish I could avoid adding that extra commit to update the .zip file, but the only way I can think of avoiding that would be to insert a commit updating the .gitattributes file into or before the commit that added the .zip file (using a rebase) and using git push -f to update the remote repo, but I can't do that.

Upvotes: 1

crthompson
crthompson

Reputation: 15865

The problem is ZipFile can't find the line of code that signals the end of the archive, so either:

  1. It is not a .zip archive.

    • It may be a .rar or other compressed type. Or as I suspect here, you are downloading an html file that auto-redirects to the zip file.
    • Solution - Gotta find a correct archive to use this code.

  2. The archive is corrupt.

    • Solution - The archive will need repairing.

  3. There is more than 1 part to the archive.

    • A multi part zip file.
    • Solution - Read in all the files before decompression.

  4. As @ElliotSchmelliot notes in comments, the file may be hidden or have extended characters in the name.

    • Solution - Check your file attributes/permissions and verify the file name.

Opening the file with your favorite zip/unzip utility (7-zip, winzip, etc) will tell which of these it could be.

Upvotes: 71

Jason Roos
Jason Roos

Reputation: 81

In my case i absolutely KNEW that my zip was not corrupted, and I was able to figure out through trial and error that I was extracting the files to a directory with the filename and extension in the FOLDER Name.

So Unzipping /tmp/data.zip to:

/tmp/staging/data.zip/files_go_here

failed with the error [End of Central Directory record could not be found]

but extracting data.zip to this worked just fine:

/tmp/staging/data/files_go_here

While it might seem unusual to some folks to name a folder a filename with extension, I can't think of a single reason why you should not be able to do this, and more importantly -- the error returned is not obviously related to the cause.

I was getting the same error with both the System.IO.Compression library and 3rd party packages such as SharpZipLib -- which is what eventually clued me in that it was a more general issue.

I hope this helps someone and saves them some time/frustration.

Upvotes: 4

Mehmet Kurt
Mehmet Kurt

Reputation: 1

I found resolution.

Move "Tools->Nuget PackageManager ->Package Manager Settings" and in "Nuget Package Manager" -General Tab , click Clear All Nuget Caches button and OK. You can install package from online

Upvotes: -2

frenchone
frenchone

Reputation: 1597

Write down the stream to a file then inspect it with a (hex) editor.
I got the same message in Visual Studio when downloading nupkg from nuget.org. It was because nuget.org was blacklisted by the firewall. So instead of the pkg I got a html error page which (of course) cannot be unzipped.

Upvotes: 0

paulf
paulf

Reputation: 131

I just came across this thread when I had the same error from a PowerShell script calling the Net.WebClient DownloadFile method.

In my case, the problem was that the web server was unable to provide the requested zip file, and instead provided an HTML page with an error message in it, which obviously could not be unzipped.

So instead, I created an exception handler to extract and present the "real" error message.

Upvotes: 2

user3899886
user3899886

Reputation: 11

Might be useful to someone else. I dealt with this by adding an exception to my code, which then:

  1. Creates a temporary directory
  2. Extracts the zip archive (normally works)
  3. Renames the original ziparchive to *.bak
  4. Zips and replaces the original archive file with one that works

Upvotes: 1

Raghu
Raghu

Reputation: 136

I used SharpCompress C#.net Library available via Nuget Package manager, it solved my purpose of unzipping.

Upvotes: 2

SZL
SZL

Reputation: 855

I have the same problem, but in my case the problem is with the compression part and not with the decompression.

During the compression I need use the "Using" statament with the Stream and the ZipArchive objects too. The "Using" statament will Close the archive properly and I can decompress it without any problem.

The working code in my case in VB.Net:

Using zipSteramToCreate As New MemoryStream()
    Using archive As New ZipArchive(zipSteramToCreate, ZipArchiveMode.Create)
        ' Add entry...
    End Using

    ' Return the zip byte array for example:
    Return zipSteramToCreate.ToArray
End Using

Upvotes: 13

Roger Hill
Roger Hill

Reputation: 4099

I encountered this same problem. There are many types of compression, .zip being only one of the types. Look and make sure that you aren't trying to 'unzip' a .rar or similar file.

Upvotes: 3

Scott Chamberlain
Scott Chamberlain

Reputation: 127563

From your old question you deleted.

I get System.IO.InvalidDataException: End of Central Directory record could not be found.

This most likely means whatever file you are passing in is malformed and the Zip is failing. Since you already have the file outfile on the hard drive I would recommend trying to open that file with with windows built in zip extractor and see if it works. If it fails the problem is not with your unzipping code but with the data the server is sending to you.

Upvotes: 17

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