Ruby

Get Compressed ZIP Entry Data as Base64 Using ZipEntry.CopyToBase64

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This example creates a small ZIP archive containing a text file added from memory, writes the ZIP to disk, re-opens it, and then uses ZipEntry.CopyToBase64 to retrieve the compressed data for the text file as a Base64-encoded string.

The Base64 string returned by CopyToBase64 represents the compressed bytes stored for the entry inside the ZIP archive. It is not the original uncompressed text data.

Ruby

require 'chilkat'

success = false

# ------------------------------------------------------------
# First create a sample ZIP archive containing a small text file.

zip = Chilkat::CkZip.new()

success = zip.NewZip("c:/temp/sampleText.zip")
if (success == false)
    print zip.lastErrorText() + "\n";
    exit
end

# Add a small text file from memory.
# The text is stored in the ZIP as "hello.txt".
success = zip.AddString("hello.txt","Hello from a ZIP entry!","utf-8")
if (success == false)
    print zip.lastErrorText() + "\n";
    exit
end

# Write the ZIP archive to disk and close it.
success = zip.WriteZipAndClose()
if (success == false)
    print zip.lastErrorText() + "\n";
    exit
end

# ------------------------------------------------------------
# Now open the ZIP archive we just created.

zip2 = Chilkat::CkZip.new()

success = zip2.OpenZip("c:/temp/sampleText.zip")
if (success == false)
    print zip2.lastErrorText() + "\n";
    exit
end

# Get the text file entry.
entry = Chilkat::CkZipEntry.new()

success = zip2.EntryOf("hello.txt",entry)

if (success == false)
    print "Entry not found." + "\n";
    exit
end

# Get the compressed ZIP entry data as Base64.
# 
# This is the compressed data stored inside the ZIP file,
# not the uncompressed text "Hello from a ZIP entry!".
b64 = entry.copyToBase64()

print "Base64 compressed ZIP entry data:" + "\n";
print b64 + "\n";

zip2.CloseZip()

print "Done." + "\n";