/// <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());
}
}
private void WriteFile(string path, bool tail, HttpListenerContext context)
{
try
{
if (tail)
{
Logger.Debug("Directory server tailing file '{0}'", path);
string mimeType = DetectContentType(path);
context.Response.StatusCode = (int)System.Net.HttpStatusCode.OK;
context.Response.ContentType = mimeType;
StreamHandler streamHandler = new StreamHandler(path, TimeSpan.FromMilliseconds(50), TimeSpan.FromMilliseconds(this.streamingTimeout), context);
streamHandler.Start();
}
else
{
DumpFile(path, context);
}
}
catch (Exception ex)
{
DirectoryServer.WriteServerError(ex.Message, context);
}
}
/// <summary>
/// Lists directory, or writes file contents in the HTTP response as per the
/// the response received from the DEA. If the "tail" parameter is part of
/// the HTTP request, then the file contents are streamed through chunked
/// HTTP transfer encoding. Otherwise, the entire file is dumped in the HTTP
/// response.
/// Writes appropriate errors and status codes in the HTTP response if there is
/// a problem in reading the file or directory.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="tail">if set to <c>true</c> it means we tail the file live.</param>
/// <param name="context">Http context to respond to.</param>
private void ListPath(string path, bool tail, HttpListenerContext context)
{
if (File.Exists(path))
{
this.WriteFile(path, tail, context);
}
else if (Directory.Exists(path))
{
DirectoryServer.ListDir(path, context);
}
else
{
Logger.Warning(Strings.PathNotFound, path);
DirectoryServer.WriteEntityNotFound(context);
}
}
