How to set far future expire headers on RackSpace CDN?

<div dir="ltr" style="text-align: left;" trbidi="on"><br /><div class="entry fix"><br /><div class="first-para"><br />RackSpace enables setting TTL of container trough control panel. This setting sets the value of expire headers to all new <a class="zem_slink" href="http://en.wikipedia.org/wiki/Computer_file" rel="wikipedia" title="Computer file">files</a> in container.<br /><br />If TTL is set to 72h then <a class="zem_slink" href="http://en.wikipedia.org/wiki/List_of_HTTP_header_fields" rel="wikipedia" title="List of HTTP header fields">expire header</a> of file will be set to: current time + 72h.<a href="http://blog.html-color-codes.info/wp-content/uploads/2011/06/rack.png"><img alt="" class="alignright size-full wp-image-32" src="http://blog.html-color-codes.info/wp-content/uploads/2011/06/rack.png" title="RackSpace TTL setting" width="474" /></a></div><br />Sadly you can’t set  TTL to more than 72 hours trough RackSpace web Control Panel. <a class="zem_slink" href="http://cyberduck.ch/" rel="homepage" title="Cyberduck">Cyberduck</a> (free software for managing files in CDN) doesn’t support setting this too.<br /><br />So the only way to set TTL of the container is trough <a class="zem_slink" href="http://en.wikipedia.org/wiki/Application_programming_interface" rel="wikipedia" title="Application programming interface">API</a>. I went trough C# examples on their website but I found them to be too  complex and confusing so I wrote my own code in C#.<br /><br />It’s really simple. All you have to do is write one GET <a class="zem_slink" href="http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol" rel="wikipedia" title="Hypertext Transfer Protocol">HTTP request</a> to get the <a class="zem_slink" href="http://en.wikipedia.org/wiki/Security_token" rel="wikipedia" title="Security token">authentication token</a> and one <a class="zem_slink" href="http://en.wikipedia.org/wiki/POST_%28HTTP%29" rel="wikipedia" title="POST (HTTP)">POST</a> HTTP request to set the TTL.<br /><br />Below is the source code of C# console application, all you have to do is to change the values of <a class="zem_slink" href="http://en.wikipedia.org/wiki/User_%28computing%29" rel="wikipedia" title="User (computing)">Username</a>, APIKey and Container strings.<br /><br />After you run the example the TTL of Container will be set to 1 year and far future expire headers of new files will have date one year ahead.<br /><br /><br /><br /><div><br /><div class="syntaxhighlighter csharp" id="highlighter_700064"><br /><textarea style="height: 100px; width: 100%;">using System;<br />using System.Net;<br /> <br />class RackSpaceSetTTL<br />{<br /> static void Main(string[] args)<br /> {<br /> string Username = "yourusername"; //change to your username<br /> string APIKey = "yourapikey"; // change to your <a class="zem_slink" href="http://en.wikipedia.org/wiki/Application_programming_interface_key" title="Application programming interface key" rel="wikipedia">API Key</a><br /> string Container = "yourcontainer"; // change to your Container<br /> string TTLInSeconds = "31556926"; // 1 year<br /> <br /> //First http (GET) request: getting authentication token<br /> HttpWebRequest HttpRequest = (HttpWebRequest)<br /> WebRequest.Create("https://auth.api.rackspacecloud.com/v1.0");<br /> HttpRequest.Headers.Add("x-auth-user: " + Username);<br /> HttpRequest.Headers.Add("x-auth-key: " + APIKey);<br /> <br /> HttpWebResponse HttpResponse = (HttpWebResponse)<br /> HttpRequest.GetResponse();<br /> <br /> //string[] names1 = HttpResponse.Headers.AllKeys; //uncomment this to see all headers<br /> //foreach(string n in names1) Console.WriteLine("{0,-20}{1}", n, HttpResponse.Headers[n]); //uncomment this to see all headers<br /> <br /> string XAuthToken = HttpResponse.Headers["X-Auth-Token"].<a class="zem_slink" href="http://www.oracle.com/technetwork/java/" title="Java (programming language)" rel="homepage">ToString</a>();<br /> string XCDNManagementUrl = HttpResponse.Headers["X-CDN-Management-Url"].ToString();<br /> <br /> HttpResponse.Close();<br /> <br /> Console.WriteLine("X-Auth-Token: " + XAuthToken);<br /> Console.WriteLine("X-CDN-Management-Url: " + XCDNManagementUrl);<br /> Console.WriteLine("***");<br /> <br /> //Second http (POST) request: Setting TTL for container<br /> HttpRequest = (HttpWebRequest)<br /> WebRequest.Create(XCDNManagementUrl + "/" + Container);<br /> HttpRequest.Method = "POST";<br /> HttpRequest.Headers.Add("X-Auth-Token: " + XAuthToken);<br /> HttpRequest.Headers.Add("X-TTL: " + TTLInSeconds);<br /> HttpRequest.Headers.Add("X-CDN-Enabled: True");<br /> HttpRequest.Headers.Add("X-Log-Retention: False");<br /> <br /> HttpResponse = (HttpWebResponse)<br /> HttpRequest.GetResponse();<br /> <br /> //string[] names2 = HttpResponse.Headers.AllKeys; //uncomment this to see all headers<br /> //foreach (string n in names2) Console.WriteLine("{0,-20}{1}", n, HttpResponse.Headers[n]); //uncomment this to see all headers<br /> <br /> Console.WriteLine(HttpResponse.StatusDescription);<br /> <br /> HttpResponse.Close();<br /> <br /> Console.ReadLine();<br /> }<br />}<br />



You can download file with source code here: Download setTTL.zip