Is there a way to attach Ruby Net::HTTP request to a specific IP address / network interface? - ruby

Question

Im looking a way to use different IP addresses for each GET request with standard Net::HTTP library. Server has 5 ip addresses and assuming that some API`s are blocking access when request limit per IP is reached. So, only way to do it - use another server. I cant find anything about it in ruby docs.
For example, curl allows you to attach it to specific ip address (in PHP):
$req = curl_init($url)
curl_setopt($req, CURLOPT_INTERFACE, 'ip.address.goes.here';
$result = curl_exec($req);
Is there any way to do it with Net::HTTP library? As alternative - CURB (ruby curl binding). But it will be the last thing i`ll try.
Suggestions / Ideas?
P.S. The solution with CURB (with dirty tests, ip`s being replaced):
require 'rubygems'
require 'curb'
ip_addresses = [
'1.1.1.1',
'2.2.2.2',
'3.3.3.3',
'4.4.4.4',
'5.5.5.5'
]
ip_addresses.each do |address|
url = 'http://www.ip-adress.com/'
c = Curl::Easy.new(url)
c.interface = address
c.perform
ip = c.body_str.scan(/<h2>My IP address is: ([\d\.]{1,})<\/h2>/).first
puts "for #{address} got response: #{ip}"
end

Answer 1

I know this is old, but hopefully someone else finds this useful, as I needed this today. You can do the following:
http = Net::HTTP.new(uri.host, uri.port)
http.local_host = ip
response = http.request(request)
Note that you I don't believe you can use Net::HTTP.start, as it doesn't accept local_host as an option.

Answer 2

There is in fact a way to do this if you monkey patch TCPSocket:
https://gist.github.com/800214
Curb is awesome but won't work with Jruby so I've been looking into alternatives...

Answer 3

Doesn't look like you can do it with Net:HTTP. Here's the source
http://github.com/ruby/ruby/blob/trunk/lib/net/http.rb
Line 644 is where the connection is opened
s = timeout(#open_timeout) { TCPSocket.open(conn_address(), conn_port()) }
The third and fourth arguments to TCPSocket.open are local_address and local_port, and since they're not specified, it's not possible. Looks like you'll have to go with curb.

Answer 4

Of course you can. I did as below:
# remote_host can be IP or hostname
uri = URI.parse( "http://" + remote_host )
http = Net::HTTP.new( uri.host, uri.port )
request = Net::HTTP::Get.new(uri.request_uri)
request.initialize_http_header( { "Host" => domain })
response = http.request( request )