(Ruby) Unzip an AES Encrypted Text File directly into a String Variable

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

zip = Chilkat::CkZip.new()

# This example opens a WinZip-compatible AES encrypted
# .zip that contains a single file: hamlet.xml.

# It decrypts and unzips hamlet.xml directly into a string
# variable.
zip.SetPassword("secret")
success = zip.OpenZip("qa_data/hamlet.zip")
if (success != true)
    print zip.lastErrorText() + "\n";
    exit
end

# entry is a CkZipEntry
entry = zip.GetEntryByName("hamlet.xml")
if (zip.get_LastMethodSuccess() == false)
    print "Failed to find entry in zip" + "\n";
    exit
end

# lineEndingBehavior:
# 0 = leave unchanged.
# 1 = convert all to bare LF's
# 2 = convert all to CRLF's
lineEndingBehavior = 0
srcCharset = "utf-8"
xmlText = entry.unzipToString(lineEndingBehavior,srcCharset)
print xmlText + "\n";