Fiddler is a very popular web debugging tool that logs all the HTTP and HTTPS traffic between your system and the internet. Let's take a look at how we can use Fiddler to analyze the behavior and performance of our web application. Once again, let's use https://www.bing.com as an example.
Let's start by taking a look at how you can capture traffic with Fiddler:
Initial view of Fiddler showing the traffic capturing toggle on
As you can see in the preceding screenshot, there's a toggle at the bottom-left of the tool, which can be turned on and off so that you record traffic only for the duration you're interested in. Note that the the preceding screenshot does not show the complete UI of the tool. Fiddler contains several useful tabs, many of which we will explore shortly.
Let's initiate a search request on Bing now. First, let's start the traffic capture on Fiddler. Next, let's type "Mount Rainier" on Bing's search box and hit Enter. Let's go back to Fiddler and stop the traffic capture...