starred/sharpcompress
1
0
Fork 0
mirror of https://github.com/adamhathcock/sharpcompress.git synced 2026-02-04 05:25:00 +00:00
Code Issues 975 Packages Projects Releases 20 Wiki Activity

GZipStream fails if whole file not read #467

New Issue
Open
opened 2026-01-29 22:12:33 +00:00 by claunia · 1 comment
claunia commented 2026-01-29 22:12:33 +00:00
Owner
Copy Link

Originally created by @neumatho on GitHub (Jul 21, 2021).

I have the following simple code:

using (FileStream fs = new FileStream(@"<path to file>.gz", FileMode.Open, FileAccess.Read))
{
	GZipStream gz = new GZipStream(fs, CompressionMode.Decompress);

	byte[] buf = new byte[601565];  // Full decompressed length of file
//	byte[] buf = new byte[16];
	gz.Read(buf, 0, buf.Length);

	gz.Dispose();
}

If only part of the file is read, the gz.Dispose() fails with either a "Destination too short" or "CRC checksum mismatch" exception. If the whole file is read, everything works fine.

The file to open, is a single file compressed with GZip. No archive.

Originally created by @neumatho on GitHub (Jul 21, 2021). I have the following simple code: ``` using (FileStream fs = new FileStream(@"<path to file>.gz", FileMode.Open, FileAccess.Read)) { GZipStream gz = new GZipStream(fs, CompressionMode.Decompress); byte[] buf = new byte[601565]; // Full decompressed length of file // byte[] buf = new byte[16]; gz.Read(buf, 0, buf.Length); gz.Dispose(); } ``` If only part of the file is read, the gz.Dispose() fails with either a "Destination too short" or "CRC checksum mismatch" exception. If the whole file is read, everything works fine. The file to open, is a single file compressed with GZip. No archive.
claunia commented 2026-01-29 22:12:33 +00:00
Author
Owner
Copy Link

@adamhathcock commented on GitHub (Aug 17, 2021):

This is how the current GZipStream works because it's trying to validate the data. An option to skip this could possibly be added.

If you don't want to read more, you can just copy the rest of the stream to Stream.Null

@adamhathcock commented on GitHub (Aug 17, 2021): This is how the current GZipStream works because it's trying to validate the data. An option to skip this could possibly be added. If you don't want to read more, you can just copy the rest of the stream to Stream.Null
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
bug
duplicate
enhancement
feedback requested
not bug
pull-request
Mirrored from GitHub Pull Request
 question
up for grabs
wontfix
No Label
Milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
claunia
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: starred/sharpcompress#467
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?