Support multiple backend sites

[DanielHeath]

This looks really cool :)

I'm hosting multiple sites on the same IP - if I get time (doubtful) I might try & implement multiple backing sites (golang has SNI natively on the server).

Any thoughts RE the command line arguments for this?

[jtolio]

hah I was totally thinking the same thing! I actually just pushed https://github.com/spacemonkeygo/tlshowdy yesterday as well (not that it's needed here since this just uses crypto/tls anyway), so it was on my mind.

I think the main challenge right now is that I'm just using the flag package for arg parsing, and that's probably the wrong thing to keep using. I suspect that the best commandline UX for multiple backing sites would be some form of repeated flag and the flag package doesn't do repeated flags well. I'd expect a UX like:

lecat -m site1.domain.tld:target1:port2 -m site2.domain.tld:target2:port2 ...

so maybe we pull in github.com/codegangsta/cli?

Dunno, if you get to it before I do (likely, even though you said doubtful), I'd be thrilled to merge a pull request

[DanielHeath]

I can think of a few alternatives:

• Use a library from outside the stdlib
• Have one flag and use strings to process it (e.g. lecat -sites site1.tld:target1:port1,site2.tld:target2:port2)
• Accept sites one-per-line via STDIN / config file

[jtolio]

i'm leaning toward the first option. we do the second (comma-separated) at $dayjob and it works but it's not my favorite. the third option seems like it reduces the setup simplicity of the tool, but might be a good choice in addition to 1. but yeah, whatever works

[DanielHeath]

Fair point RE 3 - I'm used to shell hackery eg echo 'foo.bar:localhost:8080' | lecat but it's not widespread knowledge.

I'd be in favor of defaulting target to localhost (so you can do foo.bar:8080).

[DanielHeath]

Wait a second - I just realized you don't need any special libs after all for this syntax. They can be normal positional arguments instead of flags.

lecat [options] site1.domain.tld:target1:port1 [site2.domain.tld:target2:port2...]