Redux: Using a C# script task in SSIS to download a file over http

A few people have asked for further information about the C# script task which I blogged about (quite a while ago).  I mistakenly forgot to add the full source code, sorry everyone.  Here is the link to the original blog post:

I have since imported the SSIS package into Visual Studio 2010 (BIDS) and the code compiles without error.  Some of the code below is truncated on the right (just a formatting issue I need to resolve) but the core of the code is there.  

As always, let me know if there are any problems. 

   Download a file over http using Script Task in SQL Server 2008 R2 Integration Services.   
Two key variables, vSSOReportURL, which is constructed in a prior Script Task e.g. http://www..
vSSOLocalFileName, which is the fully qualified reference for the downloaded file e.g. c:\

*/ using System; using System.Data; using Microsoft.SqlServer.Dts.Runtime; using System.Windows.Forms; using System.Net; using System.Net.Security; namespace ST_7e897e41dd5945f3b77366d32f0a97e0.csproj { [Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute] public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase { #region VSTA generated code enum ScriptResults { Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success, Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure }; #endregion public void Main() { WebClient myWebClient; string RemoteURI; string LocalFileName; bool FireAgain = true; Variables vars = null; Dts.VariableDispenser.LockForRead("User::vSSOReportURL"); Dts.VariableDispenser.LockForRead("User::vSSOLocalFileName"); Dts.VariableDispenser.LockForWrite("User::vSSOReportURLIndicator"); Dts.VariableDispenser.GetVariables(ref vars); try { // Ignore certificate warnings ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(delegate { return true; }); // Initiate webclient download, use default credentials (current login) myWebClient = new WebClient(); myWebClient.Credentials = CredentialCache.DefaultCredentials; RemoteURI = vars["User::vSSOReportURL"].Value.ToString(); LocalFileName = vars["User::vSSOLocalFileName"].Value.ToString(); // Log provider notification Dts.Events.FireInformation(0, String.Empty, String.Format("Downloading '{0}' from '{1}'", LocalFileName, RemoteURI), String.Empty, 0, ref FireAgain); // Download the file myWebClient.DownloadFile(RemoteURI, LocalFileName); // Set report URL indicator, this is used to determine the http source of the // download i.e. vSSOReportURL or vSSOReportURLRetry for the message which is // written to the table vars["User::vSSOReportURLIndicator"].Value = 0; // Return success Dts.TaskResult = (int)ScriptResults.Success; } catch (Exception ex) { // Catch and handle error Dts.Events.FireError(0, String.Empty, ex.Message, String.Empty, 0); Dts.TaskResult = (int)ScriptResults.Failure; } } } }

The files are extracted using an Execute Process Task (with 7-Zip) as shown below:


And the arguments are set using the expression (below).  There are probably better ways of doing this but I found this worked well.


The .zip file is then archived using a File System task and the extracted file is renamed to .xlsx. 

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