(Swift 3,4,5...) Get Response Header for Method that does not Return HttpResponse Object

Demonstrates how to get the response header and individual response header fields for a method that does not return an HTTP response object. (If a method returns an HHTTP response object, then the response header information should be obtained from the response object.)

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()!

    var strHtml: String? = http.quickGetStr("https://www.duckduckgo.com/")
    if http.lastMethodSuccess == false {
        print("\(http.lastErrorText!)")
        return
    }

    print("\(http.lastResponseHeader!)")

    // Here's a sample HTTP response header:

    // Server: nginx
    // Date: Wed, 30 Sep 2020 13:13:02 GMT
    // Content-Type: text/html; charset=UTF-8
    // Transfer-Encoding: chunked
    // Connection: keep-alive
    // Vary: Accept-Encoding
    // ETag: W/"5f7371f4-1683"
    // Strict-Transport-Security: max-age=31536000
    // X-Frame-Options: SAMEORIGIN
    // Content-Security-Policy: default-src https: blob: data: 'unsafe-inline' 'unsafe-eval'; frame-ancestors 'self'
    // X-XSS-Protection: 1;mode=block
    // X-Content-Type-Options: nosniff
    // Referrer-Policy: origin
    // Expect-CT: max-age=0
    // Expires: Wed, 30 Sep 2020 13:13:01 GMT
    // Cache-Control: no-cache
    // Content-Encoding: gzip

    // We can load it into a Chilkat MIME object to get header field values:
    let mime = CkoMime()!

    var success: Bool = mime.load(http.lastResponseHeader)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    // Get MIME header field values using Chilkat MIME...
    print("----")
    print("ETag: \(mime.getHeaderField("ETag")!)")

}