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Introduction to Fiddler. March 9, 2007. Fiddler – What’s It Good For?. Diagnosing Web site issues. Analyzing Web site performance. Other uses. How Does it Work?. When Fiddler starts it registers itself as the system proxy. It becomes a transparent layer between the browser and server.

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Fiddler what s it good for l.jpg
Fiddler – What’s It Good For?

  • Diagnosing Web site issues.

  • Analyzing Web site performance.

  • Other uses.


How does it work l.jpg
How Does it Work?

  • When Fiddler starts it registers itself as the system proxy.

  • It becomes a transparent layer between the browser and server.



Getting started l.jpg
Getting Started

  • Download from http://www.fiddlertool.com/fiddler/version.asp

  • Turn Fiddler on/off

    • Tools  Fiddler

  • Verify status

    • Tools  Internet Options  Connections  LAN Setting  Advanced


Wininet l.jpg
WinInet

  • WinINet enables applications to interact with Gopher, FTP, and HTTP protocols to access Internet resources.


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Let’s Look at Examples

  • www.olemiss.edu

  • secure.olemiss.edu

  • www.olemiss.edu/depts/HR/

  • www.mcsr.olemiss.edu

  • Dial-up simulation


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Protocol Numbers

  • http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

  • 200 – OK.

  • 304 – Not modified.

  • 404 – Not found.


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Simulate Dial-Up

  • Rules -> Performance -> Simulate Modem Speeds


Learn more l.jpg
Learn More

  • Sandbox for Fiddler testing

    • http://www.bayden.com/sandbox/

  • FiddlerScript Examples

    • http://www.enhanceie.com/Fiddler/dev/ScriptSamples.asp


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