How can I decompress a gzip stream with zlib?

Posted by Greg Hewgill on Stack Overflow See other posts from Stack Overflow or by Greg Hewgill
Published on 2009-12-03T09:19:39Z Indexed on 2010/06/02 6:33 UTC
Read the original article Hit count: 314

Filed under:

gzip

|

zlib

|

inflate

Gzip format files (created with the gzip program, for example) use the "deflate" compression algorithm, which is the same compression algorithm as what zlib uses. However, when using zlib to inflate a gzip compressed file, the library returns a Z_DATA_ERROR.

How can I use zlib to decompress a gzip file?

© Stack Overflow or respective owner

Related posts about gzip

Twitterbot/0.1,gzip(gfe),gzip(gfe)

as seen on Server Fault - Search for 'Server Fault'
I see a lot of this on my google app engine error log: 05-18 06:44AM 00.897 /NTp9 405 17ms 0cpu_ms 0kb Twitterbot/0.1,gzip(gfe),gzip(gfe) 128.242.241.133 - - [18/May/2010:06:44:00 -0700] "HEAD /NTp9 HTTP/1.1" 405 124 - "Twitterbot/0.1,gzip(gfe),gzip(gfe)" Should I do something for it?? >>> More
ASP.NET GZip Encoding Caveats

as seen on West-Wind - Search for 'West-Wind'
GZip encoding in ASP.NET is pretty easy to accomplish using the built-in GZipStream and DeflateStream classes and applying them to the Response.Filter property. While applying GZip and Deflate behavior is pretty easy there are a few caveats that you have watch out for as I found out today for… >>> More
How do I turn on gzip in Apache2?

as seen on Server Fault - Search for 'Server Fault'
I simply did : sudo aptitude install apache2 And that's how my server is set up. No extra modules, no nothing. I'm on ubuntu jaunty. >>> More
I can't update my system properly, "no package header" error

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
Every time I try to run sudo apt-get update or try running updates from the GUI interface I run into the following problem or something similar: Reading package lists... Error! E: Encountered a section with no Package: header E: Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise_restricted_binary-i386_Packages E:… >>> More
Twitterbot/0.1,gzip(gfe),gzip(gfe)

as seen on Stack Overflow - Search for 'Stack Overflow'
I see a lot of this on my google app engine error log: 05-18 06:44AM 00.897 /NTp9 405 17ms 0cpu_ms 0kb Twitterbot/0.1,gzip(gfe),gzip(gfe) 128.242.241.133 - - [18/May/2010:06:44:00 -0700] "HEAD /NTp9 HTTP/1.1" 405 124 - "Twitterbot/0.1,gzip(gfe),gzip(gfe)" May I know what is this? >>> More

Related posts about zlib

Zlib compression in boost::iostreams not compatible with zlib.NET

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I want to send compressed data between my C# to a C++ application in ZLIB format. In C++, I use the zlib_compressor/zlib_decompressor available in boost::iostreams. In C#, I am currently using the ZOutputStream available in the zlib.NET library. First of all, when I compress the same data… >>> More
How to keep g++ from taking header file from /usr/include?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am building using zlib.h which I have a local copy to v1.2.5, but in /usr/include/zlib.h there is v1.2.1.2. If I omit adding -I/my/path/to/zlib to my make I get error from using old version which doesn't have Z_FIXED: g++ -g -Werror -Wredundant-decls -D_FILE_OFFSET_BITS=64 -c -o ARCH.linux_26_i86/debug/sysParam… >>> More
How to uncompress the NSData in Php which is compressed using zlib in Iphone

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello Everyone, I am quite new to Iphone development , so please bear me if I ask some some common questions. In my application I have to transfer data from my Iphone app to a PHP server and for this I have to compress the NSdata in my Iphone app and then pass it on to the PHP server and then Uncompress… >>> More
Decompress PNG using zlib

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi All, How can I use zlib library to decompress a PNG file? I have no idea how to read a PNG file. When I opened a PNG file in TextPad(a text editor), the data was not at all understandable. Is it because a PNG file is compressed? Any help is greatly appreciated. I need to read a PNG file using… >>> More
zlib memory usage / performance. With 500kb of data.

as seen on Stack Overflow - Search for 'Stack Overflow'
Is zLib Worth it? Are there other better suited compressors? I am using an embedded system. Frequently, I have only 3MB of RAM or less available to my application. So I am considering using zlib to compress my buffers. I am concerned about overhead however. The buffer's average size will be 30kb… >>> More