UNZIP FILES

mitto

Hello Guys,
I have no idea how to extract files from a zip file that
I've successfully downloaded with urlLoader.
Can someone help to put me on the right track?
tanks
Mat

antix

@mitto, did you find this forum thread?? http://giderosmobile.com/forum/discussion/3833/extract-zip-or-tar-files/p1

mitto

Yes i've already checked that thread and the links are broken :-( i think it's to old.

talis

It is written that library is supporting basic zip extracting, without encryption.
https://github.com/zerkman/zzlib
Never tried it just found it from here;
http://lua-users.org/wiki/CompressionAndArchiving

mitto

@talis Hi talis, Thank you for the links !
i've download zzlib.lua but give me an error when i
gave a try after added as file to my project.

Does anyone know if this can be used?
thank you

talis

After a quick analys i discovered that this library using bit32 operations whihc is supported in Lua 5.2 . I am not sure which version of Lua Gideros is using, but it seems the problem with this Lua library. Better try another one.

antix

@mitto, LuaZip has a GitHub repo... https://github.com/luaforge/luazip

However it is not a pure Lua based solution. There seems to be a pure Lua based one here..

https://github.com/davidm/lua-compress-deflatelua

Scratch that, it only works with gzip

hgy29

Note that gideros has native deflate function through zlib, it just misses zip file format processing

antix

@hgy29, which is what the op needs

Anyhoo find attached an example using the aforementioned zzlib.lua working with a zip file..

The example will run but the crc check fails, hence the error message. This seems odd however because the output is exactly as you would expect.. namely the text inside the hello.txt file.

This should be enough to get you going @mitto

The zzlib.lua code could be expanded to unzip every file contained within the zip file to the apps documents folder as well.

antix

Right.. just ignore that example from above. I made a better one which has code to...

1. Unzip a named file from within a named zip file
2. Unzip all files from a named zip file to the apps documents folder.
3. List all files contained in a named zip file.

Let us know if you have trouble with that

mitto

Thank you talis!
I try this one because is all Lua.

mitto

Wow big thanks, antix you make it!!!