How to get ip of the user?

Alex Rousskov suggests this article as an answer to your question:
FAQ #1516: “How to get the HTTP client IP address?”.

Hi,

After installing new versions of libecap and squid, I cant run squid at all.
When i run it i am getting this error:
    ./squid: error while loading shared libraries: libecap.so.2: cannot open shared object file: No such file or directory
Do you have an idea what is going on?

Ok, found the problem.
I needed to refresh lib cache manually.

Hi,

Please, can you explain in more details how to get to the Ip.
Because there is no member libecap::host::Xaction::option();

I only found libecap::Options and cfg object which is passed to method configure.
I was thinking i need code like this:

const libecap::Name metaIp = libecap::Name("metaClientIp");
const libecap::Area area = cfg.option(metaIp);
libecap::AreaDetails *details = area.details.get();

?? that is what i can do with this cfg object in configure method.
Also, I need IP in Xaction::start() method.

libecap::host::Xaction inherits the pure virtual option() method the from libecap::Options parent. Host applications implement that method to provide adapters with transaction-specific meta-information. If your adapter calls this method with libecap::metaClientIp name as a parameter, it may get the client IP address string back.

For more information, please see libecap/host/xaction.h, libecap/common/options.h, and libecap/common/names.h.

Hi Alex,

I'm using 3p2-ecap squid and in adapter I have line: libecap::Area area = hostx->option(libecap::metaClientIp) and when I debbug adapter every time this area object and area.details object is empty.
Am I doing something wrong? You said that adapter "may" get IP, well if this option() method is implemented adapter should get ip with above call? or not? I suppose 3p2-ecap squid implements this method?

Thank you in advance for your answer.

Thanks Alex Rousskov, that solved my question.