(Go) Get Compressed ZIP Entry Data as Base64 Using ZipEntry.CopyToBase64

See more Zip Examples

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.

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

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    success := false

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

    zip := chilkat.NewZip()

    success = zip.NewZip("c:/temp/sampleText.zip")
    if success == false {
        fmt.Println(zip.LastErrorText())
        zip.DisposeZip()
        return
    }

    // 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 {
        fmt.Println(zip.LastErrorText())
        zip.DisposeZip()
        return
    }

    // Write the ZIP archive to disk and close it.
    success = zip.WriteZipAndClose()
    if success == false {
        fmt.Println(zip.LastErrorText())
        zip.DisposeZip()
        return
    }

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

    zip2 := chilkat.NewZip()

    success = zip2.OpenZip("c:/temp/sampleText.zip")
    if success == false {
        fmt.Println(zip2.LastErrorText())
        zip.DisposeZip()
        zip2.DisposeZip()
        return
    }

    // Get the text file entry.
    entry := chilkat.NewZipEntry()

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

    if success == false {
        fmt.Println("Entry not found.")
        zip.DisposeZip()
        zip2.DisposeZip()
        entry.DisposeZipEntry()
        return
    }

    // 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()

    fmt.Println("Base64 compressed ZIP entry data:")
    fmt.Println(*b64)

    zip2.CloseZip()

    fmt.Println("Done.")

    zip.DisposeZip()
    zip2.DisposeZip()
    entry.DisposeZipEntry()