public static WorkflowHttpResponse Created(string locationUrl)
{
var response = new WorkflowHttpResponse(HttpStatusCode.Created);
response.Headers.Add(HttpResponseHeader.Location, locationUrl);
return(response);
}
public static WorkflowHttpResponse Forbidden(Exception e)
{
var response = new WorkflowHttpResponse(HttpStatusCode.Forbidden);
response.Write(e.Message);
return(response);
}
public static WorkflowHttpResponse InternalServerError(Exception e)
{
var response = new WorkflowHttpResponse(HttpStatusCode.InternalServerError);
response.Write(e.ToString());
return(response);
}
private WorkflowHttpResponse DeleteWorkItem(string path, string id)
{
if (!_workflow.ExistsWorkItem(id))
{
return(WorkflowHttpResponse.NotFound);
}
var wi = _workflow.GetWorkItem(id);
if (wi.Path != path)
{
return(WorkflowHttpResponse.NotFound);
}
try
{
_workflow.DeleteWorkItem(id);
}
catch (Exception e)
{
return(WorkflowHttpResponse.Forbidden(e));
}
return(WorkflowHttpResponse.Ok);
}
public static WorkflowHttpResponse BadRequest(Exception e)
{
var response = new WorkflowHttpResponse(HttpStatusCode.BadRequest);
response.Write(e.ToString());
return(response);
}
public void VisitWorkItem(WorkItemNode workItemNode)
{
if (!_workflow.ExistsWorkStep(_path))
{
Response = WorkflowHttpResponse.NotFound;
}
TryOperation(
() =>
{
HandleWorkItem(workItemNode);
}
);
}
private void HandleWorkItem(WorkItemNode workItemNode)
{
var workItem = workItemNode.GetWorkItem(_path);
if (!_workflow.ExistsWorkItem(workItem.Id))
{
_workflow.CreateWorkItem(workItem);
Response = WorkflowHttpResponse.Created(workItem.Path);
}
else
{
_workflow.UpdateWorkItem(workItem);
Response = WorkflowHttpResponse.Ok;
}
}
private static WorkflowHttpResponse Render(IWorkStepRenderer renderer, string path)
{
try
{
var response = WorkflowHttpResponse.Ok;
response.Headers.Add(HttpRequestHeader.ContentType, renderer.ContentType);
renderer.Render(response.OutputStream, path);
return(response);
}
catch (Exception e)
{
return(WorkflowHttpResponse.InternalServerError(e));
}
}
public void VisitWorkStep(WorkStepNode workStepNode)
{
if (_path != WorkStep.Root.Path && !_workflow.ExistsWorkStep(_path))
{
Response = WorkflowHttpResponse.NotFound;
}
TryOperation(
() =>
{
WorkStep workStep = workStepNode.GetWorkStep(_path);
_workflow.CreateWorkStep(workStep);
Response = WorkflowHttpResponse.Created(workStep.Path);
}
);
}
private void TryOperation(Action action)
{
try
{
action.Invoke();
}
catch (ArgumentException e)
{
Response = WorkflowHttpResponse.BadRequest(e);
}
catch (InvalidOperationException e)
{
Response = WorkflowHttpResponse.Forbidden(e);
}
catch (Exception e)
{
Response = WorkflowHttpResponse.InternalServerError(e);
}
}
private WorkflowHttpResponse RespondToPost(WorkflowHttpRequest request)
{
IRequestMessageParser parser;
if (!RequestMessageParserFactory.TryCreateParser(request.ContentType, out parser))
{
return(WorkflowHttpResponse.UnsupportedMediaType);
}
var visitor = new HttpPostWorkflowNodeVisitor(_workflow, request.RawUrl);
try
{
parser.Parse(request.InputStream).AcceptVisitor(visitor);
}
catch (ArgumentException e)
{
return(WorkflowHttpResponse.BadRequest(e));
}
return(visitor.Response);
}
public static WorkflowHttpResponse InternalServerError(Exception e)
{
var response = new WorkflowHttpResponse(HttpStatusCode.InternalServerError);
response.Write(e.ToString());
return response;
}
public static WorkflowHttpResponse Forbidden(Exception e)
{
var response = new WorkflowHttpResponse(HttpStatusCode.Forbidden);
response.Write(e.Message);
return response;
}
public static WorkflowHttpResponse Created(string locationUrl)
{
var response = new WorkflowHttpResponse(HttpStatusCode.Created);
response.Headers.Add(HttpResponseHeader.Location, locationUrl);
return response;
}
public static WorkflowHttpResponse BadRequest(Exception e)
{
var response = new WorkflowHttpResponse(HttpStatusCode.BadRequest);
response.Write(e.ToString());
return response;
}
private static void CopyResponse(WorkflowHttpResponse fromResponse, HttpListenerResponse response)
{
response.StatusCode = (int) fromResponse.HttpStatusCode;
CopyHeaders(fromResponse.Headers, response.Headers);
fromResponse.CopyOutputStreamTo(response.OutputStream);
}
