(Swift) SharePoint -- Delete a File

Demonstrates how to delete a SharePoint file.

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

    let http = CkoHttp()

    //  If SharePoint Windows classic authentication is used, then set the
    //  Login, Password, LoginDomain, and NtlmAuth properties.
    http.Login = "SHAREPOINT_USERNAME"
    http.Password = "SHAREPOINT_PASSWORD"
    http.LoginDomain = "SHAREPOINT_NTLM_DOMAIN"
    http.NtlmAuth = true

    //  The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
    //  If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
    //  establish the cookie as shown at SharePoint Online Authentication

    //  This example will delete the file named "penguins2.jpg"
    //  which is located in the "/Documents" folder.

    let req = CkoHttpRequest()
    req.HttpVerb = "POST"
    req.Path = "/_api/web/GetFileByServerRelativeUrl('/Documents/penguins2.jpg')"

    //  We need to add a form digest value in the X-RequestDigest header field.
    //  See this example for details on
    //  how to get (and cache) a form digest value
    req.AddHeader("X-RequestDigest", value: "SHAREPOINT_FORM_DIGEST")

    //  Add additional required headers.
    req.AddHeader("IF-MATCH", value: "*")
    req.AddHeader("X-HTTP-Method", value: "DELETE")

    //  Send the POST using https (TLS). Port 443 is the default port for https.
    var bUseTls: Bool = true
    var resp: CkoHttpResponse? = http.SynchronousRequest("SHAREPOINT_HTTPS_DOMAIN", port: 443, ssl: bUseTls, req: req)
    if http.LastMethodSuccess != true {
        print("\(http.LastErrorText)")
        return
    }

    //  If failed, the response body contains XML
    let xml = CkoXml()
    xml.LoadXml(resp!.BodyStr)

    if resp!.StatusCode.intValue != 200 {
        print("Response status code = \(resp!.StatusCode.intValue)")
        print("\(xml.GetXml())")

        //  For example, if the file did not exist, this would be the XML response:
        //  <?xml version="1.0" encoding="utf-8" ?>
        //  <m:error xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata">
        //      <m:code>-2146232832, Microsoft.SharePoint.SPException</m:code>
        //      <m:message xml:lang="en-US">The file /Documents/penguins2.jpg does not exist.</m:message>
        //  </m:error>
        // 

        print("Failed")
        resp = nil
        return
    }

    resp = nil

    //  If successful, the response body is empty.
    print("Success.")

}