/// <summary>
/// If validation with the DEA is successful, the HTTP request is served.
/// Otherwise, the same HTTP response from the DEA is served as response to
/// the HTTP request.
/// </summary>
/// <param name="listenerContext">Http context to respond to.</param>
private void ServeHttp(object listenerContext)
{
try
{
HttpListenerContext context = (HttpListenerContext)listenerContext;
Uri uri = context.Request.Url;
PathLookupResponse response = this.deaClient.LookupPath(uri);
if (!string.IsNullOrWhiteSpace(response.Error))
{
Logger.Warning(Strings.ErrorInLookupPath, response.Error);
DirectoryServer.WriteServerError(Strings.WinDEADidNotRespondProperly, context);
}
else
{
var queryString = string.Join(string.Empty, uri.PathAndQuery.Split('?').Skip(1));
NameValueCollection queryStrings = System.Web.HttpUtility.ParseQueryString(queryString);
bool tail = queryStrings.AllKeys.Select(key => queryStrings.GetValues(key).Contains("tail")).Any(v => v);
Logger.Debug("Directory Server file request is: {0}; path is {1}", uri, queryStrings["path"]);
this.ListPath(response.Path, tail, context);
}
}
catch (Exception ex)
{
Logger.Error("Directory Server - there was an error serving http: {0}", ex.ToString());
}
}
/// <summary>
/// Looks up the path in the DEA.
/// </summary>
/// <param name="path">The path to lookup.</param>
/// <returns>
/// A PathLookupResponse containing the response from the DEA.
/// </returns>
public PathLookupResponse LookupPath(Uri path)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
PathLookupResponse response = new PathLookupResponse();
response.Error = string.Empty;
NameValueCollection queryStrings = System.Web.HttpUtility.ParseQueryString(path.Query);
string actualPath = HttpUtility.UrlDecode(queryStrings["path"]);
switch (path.Segments[1].Replace("/", string.Empty))
{
case "instance_paths":
{
this.droplets.ForEach(delegate(DropletInstance droplet)
{
if (droplet.Properties.InstanceId == path.Segments[2].Replace("/", string.Empty))
{
if (DEAUtilities.VerifyHmacedUri(path.ToString(), this.directoryServerHmacKey, new string[] { "path", "timestamp" }))
{
string physicalPath = Path.GetFullPath((new Uri(Path.Combine(droplet.Properties.Directory, ".\\" + actualPath))).LocalPath); ;
if (physicalPath.StartsWith(droplet.Properties.Directory + Path.DirectorySeparatorChar))
{
response.Path = Path.GetFullPath(physicalPath);
}
else
{
response.Error = "Cannot access path";
}
}
else
{
response.Error = "Invalid HMAC";
}
if (!DEAUtilities.CheckUrlAge(path.ToString()))
{
response.Error = "URL expired";
}
}
});
break;
}
case "staging_tasks":
{
this.stagingTaskRegistry.ForEach(delegate(StagingInstance instance)
{
if (instance.Properties.TaskId == path.Segments[2].Replace("/", string.Empty))
{
if (DEAUtilities.VerifyHmacedUri(path.ToString(), this.directoryServerHmacKey, new string[] { "path", "timestamp" }))
{
response.Path = instance.Properties.TaskLog;
}
else
{
response.Error = "Invalid HMAC";
}
if (!DEAUtilities.CheckUrlAge(path.ToString()))
{
response.Error = "URL expired";
}
}
});
break;
}
default:
{
break;
}
}
if (response.Path == null && string.IsNullOrEmpty(response.Error))
{
response.Error = "Staging task not found";
}
return response;
}