Using Multiple Proxies

[Joey]

hello, i am doing a program that sends requests through alternating proxies (two). However, in fiddler there is only the possibility to specify one proxy, is there a way to edit the script so as to work through both proxies?

[Alexander]

Hi,

I'm not sure that I understood you correctly. You want to send the traffic to 2 different upstream proxies simultaneously? If yes, this would duplicate the traffic.

Regards,
Alexander
Progress Telerik

[Joey]

Hello Alexander,

Thanks for your reply. I want to send traffic in an alternating fashion and not simultaneously through two different upstream proxies depending on a parameter i set i.e. use one proxy for the first 10 requests and then the second proxy for the second 10 requests then switch back to the first proxy for the next 10 and so on.. Is it doable using fiddler script?

thanks for your help

Regards,

Joey

[Alexander]

Hi,

Yes, this is doable with FiddlerScript. Go to Tools -> Options -> Gateway and set one of the gateways. We should call this one primary. Then in FiddlerScript in the OnBeforeRequest function you can add custom logic for matching which request should go to the secondary gateway. For example:

if (oSession.HostnameIs("example.com")) {
    oSession["x-OverrideGateway"] = "gateway:port";
}

The important part here is settings the "X-OverrideGateway" - this is what routes the session to the secondary gateway. You can change the condition to whatever suits your case.

Regards,
Alexander
Progress Telerik