Ruby

Iterate Through ZIP Entries Using EntryAt and ZipEntry.GetNext

See more Zip Examples

This example demonstrates how to iterate through all entries in a ZIP archive using:

• Zip.EntryAt to obtain the first entry
• ZipEntry.GetNext to advance through the remaining entries

The example prints each ZIP entry's stored filename and whether the entry is a file or directory.

This approach is useful when sequentially processing ZIP entries without repeatedly calling EntryAt by index.

Suppose the ZIP archive contains:

docs/
docs/readme.txt
images/logo.png
hello.txt

The example iterates through each entry in the order stored within the ZIP archive.

Ruby

require 'chilkat'

success = false

zip = Chilkat::CkZip.new()

# Open an existing ZIP archive.
success = zip.OpenZip("c:/temp/example.zip")
if (success == false)
    print zip.lastErrorText() + "\n";
    exit
end

# A ZIP archive may contain zero entries.
if (zip.get_NumEntries() == 0)

    print "The ZIP archive is empty." + "\n";

    zip.CloseZip()
    exit
end

# ------------------------------------------------------------
# Get the first ZIP entry.
# 
# EntryAt(0,entry) initializes the ZipEntry object so that
# it represents the first entry in the ZIP archive.
# 
entry = Chilkat::CkZipEntry.new()

success = zip.EntryAt(0,entry)
if (success == false)
    print zip.lastErrorText() + "\n";
    exit
end

# ------------------------------------------------------------
# Iterate through all ZIP entries.
# 
# GetNext updates the same ZipEntry object so that it
# represents the next entry in the ZIP archive.
# 
while (success == true)

    if (entry.get_IsDirectory() == true)

        print "[Directory] " + entry.fileName() + "\n";

    else

        print "[File] " + entry.fileName() + "\n";
    end

    # Advance to the next entry.
    success = entry.GetNext()
end

zip.CloseZip()

print "Done." + "\n";