PowerBuilder

Decompress a Base64-Encoded Gzip String

See more Gzip Examples

This example demonstrates how to use the UncompressStringENC method to decompress Gzip-compressed data that is provided as an encoded string.

The example first compresses a string and encodes the result as Base64. It then demonstrates how the Base64 string can be decoded and decompressed back into the original text.

Internally, the method performs three steps:

1. The input string is decoded from the specified encoding (Base64 in this example) to obtain the compressed binary data.
2. The binary data is decompressed using the Gzip algorithm.
3. The resulting bytes are interpreted using the specified character set (UTF-8) to produce the final string.

This method is useful when working with compressed data embedded in text-based formats such as JSON, XML, or HTTP responses.

PowerBuilder

integer li_rc
oleobject loo_Gzip
string ls_InputStr
string ls_CompressedBase64
string ls_Decompressed

// This example demonstrates how to decompress Gzip data that is
// provided as a Base64-encoded string.

loo_Gzip = create oleobject
li_rc = loo_Gzip.ConnectToNewObject("Chilkat.Gzip")
if li_rc < 0 then
    destroy loo_Gzip
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// First, create a compressed Base64 string for demonstration purposes:
ls_InputStr = "The quick brown fox jumps over the lazy dog."
loo_Gzip.Filename = "quickBrownFox.txt"
ls_CompressedBase64 = loo_Gzip.CompressStringENC(ls_InputStr,"utf-8","base64")
if loo_Gzip.LastMethodSuccess = 0 then
    Write-Debug loo_Gzip.LastErrorText
    destroy loo_Gzip
    return
end if

Write-Debug "Compressed (Base64): " + ls_CompressedBase64

// Now decompress the Base64-encoded Gzip string:
ls_Decompressed = loo_Gzip.UncompressStringENC(ls_CompressedBase64,"utf-8","base64")
if loo_Gzip.LastMethodSuccess = 0 then
    Write-Debug loo_Gzip.LastErrorText
    destroy loo_Gzip
    return
end if

Write-Debug "Decompressed string:"
Write-Debug ls_Decompressed


destroy loo_Gzip