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Entries for the 'General' Category

DotNetNuke And The Elusive ‘Cannot redirect after HTTP headers have been sent.’

Today I went to log into a clients staging site and received the following error ‘Cannot redirect after HTTP headers have been sent.’ from the YSOD (Yellow Screen Of Death).

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Posted in: DotNetNuke Tips & Tricks, DotNetNuke Misc, General on Thursday, December 10, 2009 10:44 AM by Scott Schecter

IIS FTP Failed to retrieve directory listing

Upon trying to ftp some files up to a newly provisioned server I was experiencing some sporadic behavior.

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Posted in: General on Tuesday, December 01, 2009 12:10 PM by Scott Schecter

'The request signature we calculated does not match the signature you provided. Check your key and signing method' -- when uploading to Amazon S3

You may remember in one of my previous posts I recommended the Affirma ThreeSharp library for interacting with your Amazon S3 storage system.

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Posted in: General, Cloud Computing on Wednesday, November 18, 2009 2:33 PM by Scott Schecter

Extracting DotNetNuke User Information With SQL

It is not uncommon to have a client request a list of site users in a particular role. You can obviously get this information from the DotNetNuke user interface but its very easy to get this directly from the tables in SQL Management Studio and then export to a CSV or Excel file for easy distribution. Below is an example of finding all users for a particular portal.

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Posted in: DotNetNuke Tips & Tricks, DotNetNuke Misc, General on Wednesday, November 11, 2009 12:29 PM by Scott Schecter

Bubbling Up An Unhandled Exception From Assembly to Windows Service Causes Service Stop With No Logging

This one was very tricky to track down. We have a windows service that uses an assembly to transcode video files and upload them to a CDN. All of the logging of course takes place in the windows service. In our component the constructors of both the transcode and upload classes take a file full path as a parameter. We do a File.Exists() and if the file does not exist we throw an exception. Normally this is ideal as if an valid object cannot be created with the state given we want to know about it sooner rather than later. In our windows service we instantiate and perform the work of the upload or transcode objects within a for loop that has a try catch. In a non windows service the exception bubbled up will happily be caught and the iteration continues. However, it appears in a windows service it simply stops the iteration at that point. The service is not stopped in the Administrative Tools > Services MMC applet, nor is any information logged to the event viewer.

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Posted in: General on Tuesday, November 03, 2009 3:54 PM by Scott Schecter

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