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Use Fiddler to learn about existing Integration

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This is a migrated thread and some comments may be shown as answers.
Rob
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Rob asked on 06 Jan 2020, 06:47 AM

Hey Guys

Long time Telelrik user .. first time fiddler.. lol

I have a strange request from a customer.. I need to replace an existing end point that is receiving xml. But that's as much as the customer knows.

They are offering to redirect traffic they send to the end point, to another ( my) machine.. but since I don't know what they are sending , I don't know how to listen.
What I thought of , can I use fiddler to act as a proxy , and forward the traffic to the proper end point IP and return the responses back to the sender.

I think that is possible to forward the request on using the rules.. what I don't get is how I would handle / capture the response. 

I have requested if I can have the ability to install software on either the client or server to watch, but that does not seem possible. Also asked if they can replicate the network data towards  another machine so I can watch. ( or even plug an old fashioned hub in)

Any ideas / thoughts based on experience would be greatly appreciated.

Rob

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Simeon
Telerik team
answered on 10 Jan 2020, 01:59 PM

Hi Rob,

Thanks for considering Fiddler in your case with the customer. Depending on the situation it is possible that you could use Fiddler to forward the traffic to another end point.

Firstly, you should check what is the protocol which is used for sending the XML between the end points. If it is HTTP/S, then it is possible that Fiddler could help, because it is an HTTP/S proxy in general.

Then, if this is the case, you should decide how to use Fiddler - as a proxy or as a reverse proxy.

Here is a blogpost explaining how Fiddler works as a proxy and here is a documentation explaining how you could configure it to work as a reverse proxy.

I hope that this will give you some insight.

Regards,
Simeon
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Rob
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answered on 29 Jan 2020, 10:51 PM
Thank you for taking the time to answer.

The customer had no idea what the protocol was at all.. in the end it was a direct socket connection and totally proprietary.

I will keep Fiddler in mind for future work.

Many thanks

Rob
 
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