/// <summary>
/// Get task data from xml node "task"
/// </summary>
private static Task GetTaskInfo(XElement xTask)
{
TaskId id = new TaskId(xTask.Attribute("id").Value);
TaskStatus status = StatusFromString(xTask.Attribute("status").Value);
Task task = new Task();
task.Id = id;
task.Status = status;
XAttribute xRegistrationTime = xTask.Attribute("registrationTime");
if (xRegistrationTime != null)
{
DateTime time;
if (DateTime.TryParse(xRegistrationTime.Value, out time))
task.RegistrationTime = time;
}
XAttribute xStatusChangeTime = xTask.Attribute("statusChangeTime");
if (xStatusChangeTime != null)
{
DateTime time;
if (DateTime.TryParse(xStatusChangeTime.Value, out time))
task.StatusChangeTime = time;
}
XAttribute xPagesCount = xTask.Attribute("filesCount");
if (xPagesCount != null)
{
int pagesCount;
if (Int32.TryParse(xPagesCount.Value, out pagesCount))
task.PagesCount = pagesCount;
}
XAttribute xCredits = xTask.Attribute("credits");
if (xCredits != null)
{
int credits;
if( Int32.TryParse( xCredits.Value, out credits ))
task.Credits = credits;
}
XAttribute xDescription = xTask.Attribute("description");
if (xDescription != null)
task.Description = xDescription.Value;
XAttribute xResultUrl = xTask.Attribute("resultUrl");
if (xResultUrl != null)
{
task.DownloadUrl = xResultUrl.Value;
}
return task;
}
public Task GetTaskStatus(Task task)
{
Task newTask = _restServiceClient.GetTaskStatus(task.Id);
return newTask;
}
public string DownloadResult(Task task)
{
return _restServiceClient.DonwloadTextResult(task);
}
/// <summary>
/// Delete task on a server. This function cannot delete tasks that are being processed.
/// </summary>
public Task DeleteTask(Task task)
{
switch (task.Status)
{
case TaskStatus.Deleted:
case TaskStatus.InProgress:
case TaskStatus.Unknown:
throw new ArgumentException("Invalid task status: " + task.Status + ". Cannot delete");
}
string url = String.Format("{0}/deleteTask?TaskId={1}", ServerUrl, Uri.EscapeDataString(task.Id.ToString()));
WebRequest request = WebRequest.Create(url);
SetupGetRequest(url, request);
XDocument response = PerformRequest(request);
Task serverTask = ServerXml.GetTaskStatus(response);
return serverTask;
}
/// <summary>
/// Download filePath that has finished processing and save it to given path
/// </summary>
/// <param name="task">Id of a task</param>
/// <param name="outputFile">Path to save a filePath</param>
public void DownloadResult(Task task, string outputFile)
{
if (task.Status != TaskStatus.Completed)
{
throw new ArgumentException("Cannot download result for not completed task");
}
try
{
if (File.Exists(outputFile))
File.Delete(outputFile);
if (task.DownloadUrl == null)
{
throw new ArgumentException("Cannot download task without download url");
}
string url = task.DownloadUrl;
// Emergency code. In normal situations it shouldn't be called
/*
url = String.Format("{0}/{1}?TaskId={2}", ServerUrl, _getResultUrl,
Uri.EscapeDataString(task.Id.ToString()));
*/
WebRequest request = WebRequest.Create(url);
SetupGetRequest(url, request);
using (HttpWebResponse result = (HttpWebResponse)request.GetResponse())
{
using (Stream stream = result.GetResponseStream())
{
// Write result directly to file
using (Stream file = File.OpenWrite(outputFile))
{
CopyStream(stream, file);
}
}
}
}
catch (WebException e)
{
throw new ProcessingErrorException(e.Message, e);
}
}
public string DonwloadTextResult(Task task)
{
if (task.Status != TaskStatus.Completed)
{
throw new ArgumentException("Cannot download result for not completed task");
}
if (task.DownloadUrl == null)
{
throw new ArgumentException("Cannot download task without download url");
}
try
{
string url = task.DownloadUrl;
WebRequest request = WebRequest.Create(url);
SetupGetRequest(url, request);
using (var result = (HttpWebResponse)request.GetResponse())
{
using (Stream stream = result.GetResponseStream())
{
var reader = new StreamReader(stream);
string text = reader.ReadToEnd();
return text;
}
}
}
catch (WebException e)
{
throw new ProcessingErrorException(e.Message, e);
}
}