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Monthly Archives: February 2017

Web debugging tip : Using Fiddler to load local files instead of remote files

I was recently asked a question by one of my team mates if there is a way to load a file locally instead of the remote file, keeping rest of the files served from the remote server. My instinct said it should be very well possible to do it. I did a quick search and found an interesting feature in Fiddler, it is named “AutoResponder”.

autoresponder

 

Here is a good video by Eric, the creator of Fiddler which talks about it

As shown in the video, you can create a rule which can say – given a request which matches a pattern pick a local file. After adding the rule, do select “Enable rules” for the rules to take affect. Make sure to select “Unmatched request passthrough”, else all the requests which doesn’t match the rule will fail.

You can also do little advanced things using FiddlerScript. For example: if you want to pick a local file which matches a pattern, you can write code in OnBeforeRequest() and specify the pattern match by your self.

And in order for these rules to work, you shouldn’t bundle your files for obvious reasons 🙂

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Posted by on February 13, 2017 in Uncategorized