The appended Applescript allows you to zip and unzip in-situ in Finder, using an AES-256 password if required.
I've found this Applescript helpful - it only takes a minute or two to configure on your Mac.
I wrote it because I needed something to unzip WINZIP AES-256 encrypted files, and I could not get the utilities that are installed on Mac to do the job. I also tried Ez7z, which is very nice, but I had problems getting it to unzip encrypted files. Also, Ez7z is not "in-situ" in Finder, whereas my script is.
It uses Igor Pavlov's excellent 7zip programme (as does Ez7z), and indeed you can simply install the underlying programme and use it in the Terminal, but that's fiddly and bypasses Finder. I learnt UNIX scripting in the days when Geniuses were still just gurus, and the Applescript reflects that. An old FORTRAN programmer's C++ code will always look a lot like FORTRAN, and I'm sure my script will raise a grin or two. If you, or anyone else reading this can show me how to use the various Applescript components to simply replicate my script I'd be obliged. But in the meantime, I hope the script is useful.
Doug.
-- ------------------------------------
on run
-- Applescript to use Igor Pavlov's 7zip in the Mac Finder via Services
-- coded by Doug Fromoz May 2010.
-- Usage:
-- In Automator…
-- open a new Service workflow,
-- in the Actions > Library pane select "Utilities"
-- in the Actions sub-pane select "Run Applescript" and drag it into the workflow editor/builder
-- select drop-downs: Service receives selected "files or folders" in "Finder.app"
-- paste this whole script into the "Run Applescript" window
-- then go "File > Save as > 7zip" (saves as a Service)
-- That completes the installation of the 7zip Service for Finder.
-- You must also have downloaded & installed Igor Pavlov's 7za programme in /Applications
-- To then use in Finder, either...
-- select a .zip file and go "Finder > Services > 7zip",
-- then follow instructions about AES-256 password if required, etc
-- or select one or more files and go "Finder > Services > 7zip",
-- then follow instructions about setting AES-256 password, etc
-- WARNING: the Service will overwrite existing files without asking permission
set exe7za to "/Applications/7za" --path to Pavlov's 7zip programme
tell application "Finder"
set these_files to the selection --get the files selected in Finder
if (count of these_files is 1 and the name extension of (item 1 of these_files) is "zip") then --unzip the archive
set zip_file to (item 1 of these_files) as alias --a collection of 1 files...
set zip_path to my quote_str(POSIX path of zip_file)
set question to display dialog "7za. WARNING: existing files will be overwritten. Enter password: (leave blank if none)" default answer "" buttons {"Cancel", "Unzip", "Show First"} default button 2
set choice to button returned of question
if choice is equal to "Show First" then --display contents before unzipping
try
set outpt to do shell script exe7za & " l " & zip_path & " 2>&1"
on error error_message number error_number
display dialog "err msg: " & error_message & "; num: " & number & "; err: " & error_number buttons {"Cancel"} default button 1
end try
display dialog outpt buttons {"Cancel", "Unzip"}
end if
set pwd_str to text returned of question
set pwd_flag to my pwd
flag_fn(pwdstr) --password, if any
set folder_name to do shell script "/bin/echo `/usr/bin/dirname " & zip_path &"` 2>&1"
set folder_name to my quote
str(foldername)
try
set outpt to do shell script exe7za & " x -y -o" & folder_name & pwd_flag & zip_path & " 2>&1"
on error error_message number error_number
display dialog "err msg: " & error_message & "; num: " & number & "; err: " & error_number buttons {"Cancel"} default button 1
end try
display dialog outpt --the raw output message from 7za
else -- zip the selected files into an archive
display dialog "7za. WARNING: existing files will be overwritten. Enter password: (leave blank if none)" default answer "" buttons {"Cancel", "Zip"} default button 2
set pwd_str to text returned of the result
set pwd_flag to my pwd
flag_fn(pwdstr) --password, if any
set this_file to (item 1 of these_files) as alias
set file_path to my quote_str(POSIX path of this_file)
set file_name to name of this_file
set folder_name to do shell script "/bin/echo `/usr/bin/dirname " & file_path &"` 2>&1"
display dialog "Name of zip file (.zip will be added!): " default answer file_name buttons{"Cancel", "Continue"} default button 2
set zip_name to text returned of the result
set zip_path to my quote
str(foldername & "/" & zip_name & ".zip")
repeat with i from 1 to the count of these_files
set this_file to (item i of these_files) as alias
set file_path to my quote_str(POSIX path of this_file)
try
set outpt to do shell script exe7za & " a -y " & pwd_flag & zip_path & " " & file_path & " 2>&1"
on error error_message number error_number
display dialog "err msg: " & error_message & "; num: " & number & "; err: " & error_number buttons {"Cancel"} default button 1
end try
end repeat
end if
end tell
end run
--handlers (ie. functions)
on pwd
flag_fn(pwdstr)
--process the password string. if blank do nothing, else make it a parameter
if pwd_str is not "" then
set pwd_flag to " -p" & pwd_str & " "
else
set pwd_flag to " "
end if
return pwd_flag
end pwd
flagfn
on quote_str(str)
--wrap string with quotes to protect it from the shell CLI
return "\""& str &"\""
end quote_str
