If using Ruby with Net/HTTP, how to monitor its traffic using Fiddler on Windows or another tool on Mac / Linux?

Question

I usually use Fiddler to monitor HTTP request and response, but if it is a Ruby script using Net/HTTP, all the request and response won't show up in Fiddler.

Is there a way to see all the request and response, and if Fiddler can't do it, can any other tool on Mac or Linux show it?

score 8 · Answer 1 · answered Jan 02 '13 at 02:09

8

You want to use the Net::Http::Proxy library in your Ruby script.

Where you have

Net::Http.start(uri.host, uri.port)

you want

Net::HTTP::Proxy('127.0.0.1', '8888').start(uri.host, uri.port)

. . . assuming Fiddler is running on port 8888, as it does out of the box.

answered Jan 02 '13 at 02:09

Catherine Darrow

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And what if I want to use it with HTTPS connections from Ruby? – alek kowalczyk Jan 16 '17 at 23:48

score 3 · Answer 2 · answered Feb 28 '11 at 16:10

3

Have you tried WireShark?

And maybe you can get Fiddler to work by using a proxy - sending net/http to 127.0.0.1:8888 for instance.

answered Feb 28 '11 at 16:10

Michiel de Mare

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WireShark is a great tool for this, and is what I'd grab. – the Tin Man Feb 28 '11 at 22:48

score -1 · Accepted Answer · edited Feb 28 '11 at 20:01

-1

In this instance, I would use Firefox (Firebug) or Chrome (built in developer tools) to do this

(update: a working answer in the comment)

edited Feb 28 '11 at 20:01

nonopolarity

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answered Feb 28 '11 at 09:30

curv

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as long as it's coming through the browser then yes. Do you mean you are running a stand alone Ruby script from the command line? – curv Feb 28 '11 at 09:34
I am using a Ruby script to fetch from www.somewhereonnet.com... it is not a local server – nonopolarity Feb 28 '11 at 09:39
Ah... In that case Fiddler can not do it. Fiddler needs to 'bind' on to a browser in order to record requests. Try this I think it is what you need - http://www.commandlinefu.com/commands/view/1850/show-live-http-requests-being-made-on-os-x – curv Feb 28 '11 at 09:50

If using Ruby with Net/HTTP, how to monitor its traffic using Fiddler on Windows or another tool on Mac / Linux?

3 Answers3