(Go) Iterate Through ZIP Entries Using EntryAt and ZipEntry.GetNext

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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.

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    success := false

    zip := chilkat.NewZip()

    // Open an existing ZIP archive.
    success = zip.OpenZip("c:/temp/example.zip")
    if success == false {
        fmt.Println(zip.LastErrorText())
        zip.DisposeZip()
        return
    }

    // A ZIP archive may contain zero entries.
    if zip.NumEntries() == 0 {

        fmt.Println("The ZIP archive is empty.")

        zip.CloseZip()
        zip.DisposeZip()
        return
    }

    // ------------------------------------------------------------
    // 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.NewZipEntry()

    success = zip.EntryAt(0,entry)
    if success == false {
        fmt.Println(zip.LastErrorText())
        zip.DisposeZip()
        entry.DisposeZipEntry()
        return
    }

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

        if entry.IsDirectory() == true {

            fmt.Println("[Directory] ", entry.FileName())

        } else {

            fmt.Println("[File] ", entry.FileName())
        }

        // Advance to the next entry.
        success = entry.GetNext()
    }

    zip.CloseZip()

    fmt.Println("Done.")

    zip.DisposeZip()
    entry.DisposeZipEntry()