Wireshark Capture on Remote Server

The joind.in project uses a really nice vagrant setup for its dev platform - which is much needed these days as we move away from a single LAMP stack install to a website plus another website, which talks to an API and caches in redis and deploys with .... you get the picture :) This is great but having everything on the VM can make it a bit trickier to debug what's going on - and with a website that talks to an API that talks to MySQL, that all lives on a VM with port forwards, you can see the problem :)

To get an insight into the traffic going around the place, I've been using Wireshark and it's ability to capture remotely, it's really simple so I thought I'd write down my "recipe" on how to do this in case it's useful. Continue reading

Using Charles To Debug PHP SOAP

I used this trick to solve a particularly sticky problem last week, so I thought I'd share. I had a 3rd party SOAP service (except it was actually a .NET WCF service, which is almost SOAP but not quite) which didn't behave in accordance with the way its documentation said it would. PHP's SoapClient has the ability to enable tracing and give information about the request/response headers/body, which is useful, but I needed to store the outputs and also rewrite a particular request header during the course of debugging this. Enter: Charles Proxy. Continue reading