(Swift 3,4,5...) Download a Zip from a URL and OpenBd. (No .zip file is created)

Demonstrates how to download a .zip from a URL, opens the Zip, and gets the contents of a file. No file is ever written.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let http = CkoHttp()!

    let bd = CkoBinData()!

    // This URL is valid and can be tested...
    var success: Bool = http.quickGetBd("http://chilkatdownload.com/example_data/hamlet.zip", binData: bd)
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    let zip = CkoZip()!

    // Open the zip from the bytes contained in bd.
    success = zip.openBd(bd)
    if success == false {
        print("\(zip.lastErrorText!)")
        return
    }

    // Get the entry for the file we want..
    var entry: CkoZipEntry? = zip.getEntryByName("hamlet.xml")
    if zip.lastMethodSuccess != true {
        print("\(zip.lastErrorText!)")
        return
    }

    // Convert all line endings to CRLF (if needed)
    var lineEndingBehavior: Int = 2
    var xmlStr: String? = entry!.unzip(toString: lineEndingBehavior, srcCharset: "utf-8")
    if entry!.lastMethodSuccess != true {
        print("\(entry!.lastErrorText!)")
        entry = nil
        return
    }

    // The XML in this case is about 274K, so let's just examine the last 20 lines...
    let sb = CkoStringBuilder()!
    sb.append(xmlStr)

    print("\(sb.lastNLines(20, bCrlf: true)!)")

    entry = nil

}