Uncompress a zip file into a sub folder

Solar2D General Questions/Discussion
#1

Is it possible to uncompress a zip file to an existing sub folder with the zip plugin?

I want to extract the files from a zip file to a sub folder in the system.CachesDirectory.

The zip simply contains files that are not in folders.

When I extract the files to system.CachesDirectory it works fine.

When I set the dstBaseDirectory to the system.pathForFile for the subfolder, it either does nothing or causes the simulator to freeze on launch.

I also tried changing the current directory to the subfolder path and then setting the dstBsaeDirectory to the current directory with the same results.

here is my code. this function checks to see if the folder exists. if it does not, then the folder is created and the files are unzipped.

[lua]

– simple listener for uncompress function

engine_zip[“listen”] = function(event)
        if(event.isError)then
                print(“ERROR!”)
        else
                print("event.name: " … event.name)
                print("event.type: " … event.type)
        end
end

engine_zip[“unzip”] = function(fname, zfile) – name of folder we want to create, name of zip file to uncompress

        – main cache path
        local main_path = system.pathForFile("", system.CachesDirectory)
       

        – sub folder path

        local docs_path = system.pathForFile(fname, system.CachesDirectory)
       

        – function that tries to change the main directory to the sub folder path and returns a value based on whether it was successful or not.

        local fexist = engine_zip[“folder”](fname, system.CachesDirectory)
        
        local new_folder_path        

        local success = lfs.chdir(main_path)

        – uncompress options
        local zipoptions = {
                zipFile = zfile,
                zipBaseDir = system.ResourceDirectory,
                --dstBaseDir = system.CachesDirectory,
                dstBaseDir = docs_path,
                listener = engine_zip[“listen”]
                }

        – change dir to cache path
        lfs.chdir(main_path)

        --if the sub folder doesn’t exist, create it
        if(fexist==0)then
               print(“MAKE " … fname … " FOLDER”)
               lfs.mkdir(fname)
               new_folder_path = lfs.currentdir() … “/” … fname

               – after folder is created, check again before unzipping files into directory

               fexist = engine_zip[“folder”](fname, system.CachesDirectory)
               success = lfs.chdir(docs_path)

              

                – if the conditions are met, unzip.

                if(fexist==1 and success) then          
                       print(“UNZIP”)        
                       zip.uncompress(zipoptions)
                end

        end
        
end

[/lua]

#2

You might want to make the directory first, copy/download the zip file to that directory, then unzip it. After its done, delete the zip file.

Rob

#3

So I can’t then? Okay.

That solution is fine.

I tried putting the files in a folder with the proper name, and the putting the single folder in a zip file. Then I had the function simply uncompress the zip after checking that the folder didn’t exist. That way the folder with all the files in it was extracted, instead of making the folder with code. That worked fine, too.

Thank you for responding!

#4

You might want to make the directory first, copy/download the zip file to that directory, then unzip it. After its done, delete the zip file.

Rob

#5

So I can’t then? Okay.

That solution is fine.

I tried putting the files in a folder with the proper name, and the putting the single folder in a zip file. Then I had the function simply uncompress the zip after checking that the folder didn’t exist. That way the folder with all the files in it was extracted, instead of making the folder with code. That worked fine, too.

Thank you for responding!