Submitting a WebRequest from within a CLR Trigger - sql-server-2008-r2

I just implemented a prototype solution for updating my caching server in real-time by assigning a CLR Trigger to a table so that whenever a certain column is updated the URL called from the trigger will update the caching server with the correct data.
It's working fine and the code is as follows:
[Microsoft.SqlServer.Server.SqlTrigger(Name = "AdStatusChanged", Target = "Ads", Event = "FOR UPDATE")]
public static void AdStatusChanged()
{
SqlTriggerContext triggContext = SqlContext.TriggerContext;
int adID = 0, adStatusID_Old = 0, adStatusID_New = 0;
if (triggContext.TriggerAction == TriggerAction.Update)
{
using (SqlConnection conn = new SqlConnection("context connection=true"))
{
conn.Open();
SqlCommand sqlComm = new SqlCommand();
SqlPipe sqlP = SqlContext.Pipe;
sqlComm.Connection = conn;
sqlComm.CommandText = "SELECT AdID, AdStatusID from INSERTED";
SqlDataReader reader = sqlComm.ExecuteReader();
if (reader.Read())
{
adID = reader.GetInt32(0);
adStatusID_New = reader.GetInt32(1);
}
reader.Close();
sqlComm.CommandText = "SELECT AdID, AdStatusID from DELETED WHERE AdID = " + adID;
reader = sqlComm.ExecuteReader();
if (reader.Read())
{
adID = reader.GetInt32(0);
adStatusID_Old = reader.GetInt32(1);
}
}
if (adID == 0 || adStatusID_New == adStatusID_Old)
{
// Check could be more thorough !
return;
}
WebResponse httpResponse = null;
try
{
string apiURL = string.Format("{0}/{1}", "http://localhost:14003/Home", "UpdateAdStatus?adID=" + adID + "&adStatusID=" + adStatusID_New);
var httpWebRequest = (HttpWebRequest)WebRequest.Create(apiURL);
httpWebRequest.Method = "GET";
httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
// check for successful response
}
catch (Exception ex)
{
Log("WebRequest from within SQL Server failed ! " + ex.Message);
}
finally
{
if (httpResponse != null)
{
httpResponse.Close();
}
}
}
}
I would like to have some expert/experienced views on the "CONS" of this approach regarding performance, deadlocks, sql crashing, or other areas that could be of potential concern.
Has anyone tried this (I'm sure many must have) and what was the result ? a successful implementation or did you revert to some other method or updating the cache real-time?

Related

Http Post Flutter to SAP

Im trying to use http post to transfer data from flutter to SAP. I can get data without any problem, but post attempt is failing with code 403 (x-csrf-token invalid)
I had the same problem while working in C# but that was resolved using event handler, that triggers just before save (please see below extract of C# code) but i'm unable to find option in flutter. Please guide..
zZSSALE1SRVEntity.SendingRequest2 += new EventHandler<SendingRequest2EventArgs>(_container_SendingRequest_Enhance);
zZSSALE1SRVEntity.SaveChanges();
private void _container_SendingRequest_Enhance(object sender, SendingRequest2EventArgs e)
{
HttpWebResponse response;
string empty = string.Empty;
string str = string.Empty;
CookieContainer cookieContainer = new CookieContainer();
OdataSsaleDEV.ZZSSALE1_SRV_Entities zZSSALE1SRVEntity = new OdataSsaleDEV.ZZSSALE1_SRV_Entities(app_uri)
{
Credentials = credentials
};
string str1 ;
if (empty == string.Empty)
{
HttpWebRequest credentials = (HttpWebRequest)WebRequest.Create(zZSSALE1SRVEntity.BaseUri);
credentials.Method = "GET";
credentials.Headers.Add("X-CSRF-Token", "Fetch");
credentials.Credentials = zZSSALE1SRVEntity.Credentials;
cookieContainer = new CookieContainer();
credentials.CookieContainer = cookieContainer;
try
{
response = (HttpWebResponse)credentials.GetResponse();
}
catch (WebException webException)
{
MessageBox.Show(webException.Message);
return;
}
catch (Exception exception)
{
MessageBox.Show(exception.Message);
return;
}
empty = response.Headers.Get("X-CSRF-Token");
str = response.Headers.Get("Set-Cookie");
credentials.Abort();
}
if (empty != string.Empty)
{
e.RequestMessage.SetHeader("x-csrf-token", empty);
foreach (Cookie cooky in cookieContainer.GetCookies(zZSSALE1SRVEntity.BaseUri))
{
str1 = string.Concat(str1, ";", cooky.ToString());
}
e.RequestMessage.SetHeader("Cookie", str1.Substring(1));
}
Issue resolved.
Actually server requires session cookies (MYSAPSSO and SAP_SESSIONID) along with x-csrf-token.

How to specify parameters in box-view API header?

I am using the following piece of C# code to upload, convert and download a .pptx file, via Box view API.
var boxViewID = "";
string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
String url_ = #"https://upload.view-api.box.com/1/documents";
HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url_);
wr.ContentType = "multipart/form-data; boundary=" + boundary;
wr.Headers.Add("Authorization:Token " + "MY_CODE"/*Configuration.BoxViewAPIKey*/);
wr.Method = "POST";
wr.KeepAlive = true;
wr.Credentials = System.Net.CredentialCache.DefaultCredentials;
wr.Timeout = 1000000;
wr.SendChunked = true;
DateTime start = DateTime.Now;
Exception exc = null;
Stream rs = wr.GetRequestStream();
try
{
rs.Write(boundarybytes, 0, boundarybytes.Length);
string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; non_svg=\"true\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
string header = string.Format(headerTemplate,"file", file, contentType);
Console.WriteLine(header);
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
rs.Write(headerbytes, 0, headerbytes.Length);
FileStream fileStream = new FileStream(file, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[40960];
int bytesRead = 0;
int totalSent = 0;
int totalLength = (int)fileStream.Length;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
totalSent += bytesRead;
var percent = new decimal(100.0 * totalSent / totalLength);
if (progress != null)
{
progress("Box processing", percent);
}
rs.Write(buffer, 0, bytesRead);
}
fileStream.Close();
}
catch(Exception ex)
{
exc = ex;
}
DateTime end = DateTime.Now;
int seconds = (int)(end - start).TotalSeconds;
if(seconds>=0)
{
if(exc!=null)
{
throw exc;
}
}
byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
rs.Write(trailer, 0, trailer.Length);
rs.Close();
WebResponse wresp = null;
try
{
wresp = wr.GetResponse();
Stream stream2 = wresp.GetResponseStream();
StreamReader reader2 = new StreamReader(stream2);
var res = reader2.ReadToEnd();
var docRes = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, string>>(res);
if (docRes["id"] != null)
boxViewID = docRes["id"];
}
catch (Exception ex)
{
if (wresp != null)
{
wresp.Close();
wresp = null;
}
}
finally
{
wr = null;
}
return boxViewID;
Specifying "non_svg" parameter should create .png images for every slide in the presentation (instead of .svg + .html pairs). However, the API seems to ignore this part of the request and I am always getting svg files.
Any idea on what am I doing wrong? Thanks!
The non_svg option causes PNG representations to be generated for each page, but the SVG representation is still generated. The viewer will only load the PNG files if SVG is not supported in the browser (basically only IE 8). Try changing page-1.svg to page-1.png in the browser (e.g., https://view-api.box.com/1/sessions/465c5d45caf04752a6113b0e5df593a5/assets/page-1.png vs https://view-api.box.com/1/sessions/465c5d45caf04752a6113b0e5df593a5/assets/page-1.svg). All of the assets will exist in content.zip if you use the documents content endpoint.

RuntimeBinderException: Convert type System.Threading.Tasks.Task<object> to string

I do an example with signalR. But it doesn't function because of one mistake.
The one mistake (can not convert type system.threading.tasks.task< object> to string) is in this line:
return context.Clients.All.RecieveNotification(simple);
It is at the bottom of the code you can see below.
Below you see the method I wrote. There I do a connection with the database and get the content with a command/query.
Then a few checks and also SqlDependency.
public string SendNotifications()
{
using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString))
{
string query = "SELECT eintrag FROM [dbo].[simple_column]";
connection.Open();
using (SqlCommand command = new SqlCommand(query, connection))
{
command.Notification = null;
DataTable dt = new DataTable();
SqlDependency dependency = new SqlDependency(command);
dependency.OnChange += new OnChangeEventHandler(dependency_OnChange);
if (connection.State == ConnectionState.Closed)
connection.Open();
var reader = command.ExecuteReader();
dt.Load(reader);
if (dt.Rows.Count > 0)
{
simple = dt.Rows[0]["eintrag"].ToString();
}
}
}
IHubContext context = GlobalHost.ConnectionManager.GetHubContext<NotificationHub>();
return context.Clients.All.RecieveNotification(simple);
}
And here I use the function:
var notifications = $.connection.notificationHub;
notifications.client.recieveNotification = function (simple) {
// Add the message to the page.
$('#dbMessage').text(simple);
};
I hope you can help me.
Thanks.

CRM 2011, Stopping custom workflow programmatically

i've been trying to stop a workflow programmatically.
I've read both in various posts and in the msdn that this can be done by updating
the Asyncoperation status via update request.
However everytime i update the request. the workflow get stuck on a mid stage such as cancelling or pausing and dosen't reach a final state.
any ideas?
protected void ExecutePostAccountUpdate(LocalPluginContext localContext)
{
if (localContext == null)
{
throw new ArgumentNullException("localContext");
}
string fetchXML = "<fetch mapping='logical' count='50' version='1.0'>" +
"<entity name='asyncoperation'>" +
"<filter>" +
"<condition attribute='regardingobjectid' operator='eq' value='" +
localContext.PluginExecutionContext.PrimaryEntityId + "' />" +
"</filter>" +
"</entity>" +
"</fetch>";
EntityCollection col = localContext.OrganizationService.RetrieveMultiple(new FetchExpression(fetchXML));
if (col.Entities.Count > 0)
{
AsyncOperation a = (AsyncOperation)col[0];
a.StateCode = AsyncOperationState.Completed;
a.StatusCode = new OptionSetValue(32);
localContext.OrganizationService.Update(a);
}
}
Have a look at my blog: How to Cancel Workflow Programmatically using C#
Make sure the user have permissions to Cancel System Jobs.
QueryExpression queryExpression = new QueryExpression("asyncoperation") { ColumnSet = new ColumnSet("statuscode") };
queryExpression.Criteria.AddCondition("name", ConditionOperator.Equal, Name of Workflow);
queryExpression.Criteria.AddCondition("regardingobjectid", ConditionOperator.Equal, regardingobjectId);
var asyncOperations = organizationService.RetrieveMultiple(queryExpression);
foreach (var asyncOperation in asyncOperations.Entities)
{
if (((OptionSetValue)asyncOperation["statuscode"]).Value == 10 || // Waiting
((OptionSetValue)asyncOperation["statuscode"]).Value == 20 || // In Process
((OptionSetValue)asyncOperation["statuscode"]).Value == 0)
{
Entity operation = new Entity("asyncoperation")
{
Id = asyncOperation.Id,
["statecode"] = new OptionSetValue(3),
["statuscode"] = new OptionSetValue(32)
};
organizationService.Update(operation);
}
}
Make sure the user have permissions to Cancel System Jobs.
It seems you can un-publish a workflow via code, according to this post.
NOTE: This does not necessarily halt an in-progress workflow, but it will prevent any new workflows of that type from being started.
const int WorkflowStatusDraft = 1;
const int WorkflowStatusPublished = 2;
public void PublishWorkflow(Guid workflowId)
{
SetStateWorkflowRequest publishRequest = new SetStateWorkflowRequest();
publishRequest.EntityId = workflowId;
publishRequest.WorkflowState = WorkflowState.Published;
publishRequest.WorkflowStatus = WorkflowStatusPublished;
this.CrmService.Execute(publishRequest);
}
public void UnpublishWorkflow(Guid workflowId)
{
SetStateWorkflowRequest unpublishRequest = new SetStateWorkflowRequest();
unpublishRequest.EntityId = workflowId;
unpublishRequest.WorkflowState = WorkflowState.Draft;
unpublishRequest.WorkflowStatus = WorkflowStatusDraft;
this.CrmService.Execute(unpublishRequest);
}

Dynamics CRM 4.0 plugin fails when triggered by API

I have a plugin registered for when an account is created or updated, this is registered for the post stage.
The plugin works fine when a user creates or updates an account through the CRM interface, however when an account is created uging the API the plugin fails with the ever helpful 'server was unable to process the request' message. if an account is updated through the api the plugin also works correctly.
anyone have any ideas why?
UPDATE:
here is the create code
account = new CrmService.account();
account.ownerid = new CrmService.Owner();
account.ownerid.Value = new Guid("37087BC2-F2F0-DC11-A856-001E0B617486");
account.ownerid.type = CrmService.EntityName.systemuser.ToString();
account.name = model.CompanyName;
account.address1_line1 = model.Address1;
account.address1_line2 = model.Address2;
account.address1_stateorprovince = model.County;
account.address1_country = model.Country;
account.address1_city = model.TownCity;
account.address1_postalcode = model.PostCode;
account.new_companytype = new CrmService.Picklist();
switch (model.SmeType)
{
case SmeType.Micro:
account.new_companytype.Value = 1;
break;
case SmeType.Small:
account.new_companytype.Value = 2;
break;
case SmeType.Medium:
account.new_companytype.Value = 3;
break;
default:
break;
}
account.new_balancesheettotal = new CrmService.CrmMoney();
account.new_balancesheettotal.Value = preQualModel.BalanceSheetGBP;
account.revenue = new CrmService.CrmMoney();
account.revenue.Value = preQualModel.SalesTurnoverGBP;
if (model.Website != null)
{
account.websiteurl = model.Website.ToString();
}
account.numberofemployees = new CrmService.CrmNumber();
account.numberofemployees.Value = (int)preQualModel.NumEmployees;
accountGuid = svc.Create(account);
account.accountid = new CrmService.Key();
account.accountid.Value = accountGuid;
Here is the plugin code:
public void Execute(IPluginExecutionContext context)
{
DynamicEntity entity = null;
// Check if the InputParameters property bag contains a target
// of the current operation and that target is of type DynamicEntity.
if (context.InputParameters.Properties.Contains(ParameterName.Target) &&
context.InputParameters.Properties[ParameterName.Target] is DynamicEntity)
{
// Obtain the target business entity from the input parmameters.
entity = (DynamicEntity)context.InputParameters.Properties[ParameterName.Target];
// TODO Test for an entity type and message supported by your plug-in.
if (entity.Name != EntityName.account.ToString()) { return; }
// if (context.MessageName != MessageName.Create.ToString()) { return; }
}
else
{
return;
}
if (entity!=null && !entity.Properties.Contains("address1_postalcode"))
{
return;
}
if (context.Depth > 2)
{
return;
}
try
{
// Create a Microsoft Dynamics CRM Web service proxy.
// TODO Uncomment or comment out the appropriate statement.
// For a plug-in running in the child pipeline, use this statement.
// CrmService crmService = CreateCrmService(context, true);
// For a plug-in running in the parent pipeline, use this statement.
ICrmService crmService = context.CreateCrmService(true);
#region get erdf area from database
string postCode = entity.Properties["address1_postalcode"].ToString();
postCode = postCode.Replace(" ", ""); //remove spaces, db stores pcodes with no spaces, users usually enter them, e.g b4 7xg -> b47xg
string erdfArea = "";
SqlConnection myConnection = new SqlConnection(#"REDACTED");
try
{
myConnection.Open();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
try
{
SqlDataReader myReader = null;
SqlCommand myCommand = new SqlCommand("select ErdfAreaType from dim.Locality WHERE PostCode = '" + postCode+"'",
myConnection);
myReader = myCommand.ExecuteReader();
while (myReader.Read())
{
erdfArea = myReader["ErdfAreaType"].ToString();
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
try
{
myConnection.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
#endregion
entity.Properties["new_erdfarea"] = erdfArea;
crmService.Update(entity);
}
catch (System.Web.Services.Protocols.SoapException ex)
{
throw new InvalidPluginExecutionException(
String.Format("An error occurred in the {0} plug-in.",
this.GetType().ToString()),
ex);
}
}
Sometimes it can be difficult to see the actual source of an error in plugins. In moments like this tracing is your friend. You can use this tool to enable tracing. When you have the trace files, try to search them for the error you got in your exception. This should tell you more details about what is failing.
Turns out this was due to me expecting data that was not there due to some weird behaviour in CRM.
I was taking the dynamicEntity passed to the plugin like so
entity = (DynamicEntity)context.InputParameters.Properties[ParameterName.Target];
But this was missing critical things like accountid. fixed it by using the PostEntityImage entity instead, which had all of the expected data like so
entity = (DynamicEntity)context.PostEntityImages[ParameterName.Target];