(Ruby) Replace/Update a FIle in a .zip

Demonstrates how to replace/update a file from a .zip. Note: This requires the entire .zip to be rewritten.

Note: This example requires Chilkat v11.0.0 or greater.

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

require 'chilkat'

success = false

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

# First prepare a .zip and write it..
zip = Chilkat::CkZip.new()

zip.NewZip("qa_output/abc.zip")

# Add some files..
charset = "utf-8"
zip.AddString("a.txt","aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",charset)
zip.AddString("b.txt","bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",charset)
zip.AddString("c.txt","cccccccccccccccccccccccccccccccccccc",charset)

# Write to qa_output/abc.zip
# This .zip contains three files: a.txt, b.txt, and c.txt
success = zip.WriteZipAndClose()

# -------------------------------------------------------------------
# Open abc.zip, replace the content of the "b.txt" entry with something else, and re-write.
zip2 = Chilkat::CkZip.new()
zip2.OpenZip("qa_output/abc.zip")

entry = Chilkat::CkZipEntry.new()
if (zip2.EntryOf("b.txt",entry) == true)
    entry.ReplaceString("This is the new content.  bbbbbbbbbbbbbbbbbbbbbb","utf-8")
end

# Write the modified .zip back to "abc.zip"
success = zip2.WriteZipAndClose()

print "success." + "\n";