How can a rails app get its host name?

[explainer]

I would like my Rails app to supply a callback url to another app. I
currently have a yaml file in the config folder in which I put the
host name, but I would like to be able to query that dynamically and
do away with the yaml file. Is there a method call that returns the
current host?

[Frederick Cheung]

Sort of - a given request has a host name (look at the methods on
ActionController::Request), obviously you can only get at that inside
a controller action.

Fred

[icke]

request.host

[Norm Scherer]

explainer wrote:

I would like my Rails app to supply a callback url to another app.  I
currently have a yaml file in the config folder in which I put the
host name, but I would like to be able to query that dynamically and
do away with the yaml file.  Is there a method call that returns the
current host?

--


  

You should be able to do "name = system 'hostname' " if you are on a linux host.  This will not give the name used by a virtual host though.

[Scott Johnson]

That assumes you are on the default port (80).

[candlerb]

To find what the machine thinks its own name is (which may or may not
be related to the hostname you want in a callback url), try:

Socket.gethostname

As has been pointed out, the callback url also needs things like the
port. If you are generating this within a controller action, you could
of course just use the url_for() helper to generate the callback url.

[sami]

request.env["SERVER_ADDR"] // this will return you server ip address
request.server_name or request.host // this will return host name

Syed Samiuzzaman
software Engineer
Code71 Inc (www.code71.com)
product: www.scrumpad.com
blog: samiuzzaman.blogspot.com

[Eric]

An example that has caused me to have to use a config.yml,
ActionMailer will not have request.* available. System calls would not
work in this case either, since they would return a bad value on
vhosts or in cases where the hostname is different than request.host.

-eric

On Nov 19, 11:57 am, Frederick Cheung <frederick.che...@gmail.com>
wrote:

[shweta]

Try request.env['HTTP_HOST'] in the controller.

[tommy xiao]

request.host_with_port()

in rails 2.3.4 api

2009/11/20 shweta <shweta....@gmail.com>

Try request.env['HTTP_HOST'] in the controller.

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tommy xiao
E-mail: xiaods(AT)gmail.com

[Andres Paglayan]

probably you want to write a little rack middleware app here,
check this link and the comments with code underneath,
http://coderack.org/users/laktek/entries/11-server-proxy

[INDRANIL MUKHERJEE]

check database.yml file in config directory