(Swift 2) SharePoint -- Check Out a File (or Undo a Checkout)

In SharePoint, you can check out a file to make sure nobody can change it before you update it. After updating, you can check in the file. This example shows how to check out a SharePoint file.

Note: To undo a checkout, replace the string "checkout" with "undocheckout" in the line of code that sets the request's path.

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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

    // 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 check out the file named "penguins2.jpg" 
    // which is located in the "/Documents" folder.

    let req = CkoHttpRequest()
    req.HttpVerb = "POST"
    // Note that our path uses GetFileByServerRelativeUrl and not GetFolderByServerRelativeUrl
    // Also, if your Sharepoint site is within a site collection, the URL is formatted like this (where "teamA" is the name of the site)
    // /sites/teamA/_api/web/GetFileByServerRelativeUrl('/sites/teamA/Documents/penguins2.jpg')/checkout

    // Note: To undo a checkout, replace "checkout" with "undocheckout" in the following line of code.
    req.Path = "/_api/web/GetFileByServerRelativeUrl('/Documents/penguins2.jpg')/checkout"

    // 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")

    // 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
    }

    // 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())")
        print("Failed")
        resp = nil
        return
    }

    resp = nil

    // Show the successful XML response.
    print("\(xml.GetXml())")
    print("Success.")

    // A successful XML response looks like this:
    // <?xml version="1.0" encoding="utf-8" ?>
    // <d:CheckOut xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" 
    // 	xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"
    // 	xmlns:georss="http://www.georss.org/georss" 
    // 	xmlns:gml="http://www.opengis.net/gml" m:null="true" />
    // 
    // 

}