How to use a Fiddler to inject HTTP Headers for transaction identification

Keith A. Marshall, Lead Developer at Insight North America, talks about how he identifies certain transactions by injecting specific HTTP Headers “on-the-fly” using Fiddler.

Performance and Scalability testing are two important components in our software development and applications deployment lifecycle. The more information that is correlated from the testing the better the picture we get. This provides a better understanding of how the application is expected to react in our production environment.

In our busy complex environment it is difficult at times to separate out the specific transactions related to test running from the actual business or QC testing transactions. The use of Dynatrace has improved our ability to diagnose in development, testing, and production environments

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Andreas Grabner has 20+ years of experience as a software developer, tester and architect and is an advocate for high-performing cloud scale applications. He is a regular contributor to the DevOps community, a frequent speaker at technology conferences and regularly publishes articles on You can follow him on Twitter: @grabnerandi