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require 'net/http'
require 'uri'
Net::HTTP.version_1_2
class WserverPlugin < Plugin
def help(plugin, topic="")
"wserver <uri> => try and determine what webserver <uri> is using"
end
def wserver(m, params)
redirect_count = 0
hostname = params[:host].dup
hostname = "http://#{hostname}" unless hostname =~ /:\/\//
begin
if(redirect_count > 3)
m.reply "cowardly refusing to follow more than 3 redirects"
return
end
begin
uri = URI.parse(hostname)
rescue URI::InvalidURIError => err
m.reply "#{hostname} is not a valid URI"
return
end
unless(uri)
m.reply "incorrect usage: " + help(m.plugin)
return
end
http = @bot.httputil.get_proxy(uri)
http.open_timeout = 5
http.start {|http|
resp = http.head('/')
server = resp['Server']
if(server && server.length > 0)
m.reply "#{uri.host} is running #{server}"
else
m.reply "couldn't tell what #{uri.host} is running"
end
if(resp.code == "302" || resp.code == "301")
newloc = resp['location']
newuri = URI.parse(newloc)
# detect and ignore incorrect redirects (to relative paths etc)
if (newuri.host != nil)
if(uri.host != newuri.host)
m.reply "#{uri.host} redirects to #{newuri.scheme}://#{newuri.host}"
raise resp['location']
end
end
end
}
rescue TimeoutError => err
m.reply "timed out connecting to #{uri.host}:#{uri.port} :("
return
rescue RuntimeError => err
redirect_count += 1
hostname = err.message
retry
rescue StandardError => err
error err.inspect
m.reply "couldn't connect to #{uri.host}:#{uri.port} :("
return
end
end
end
plugin = WserverPlugin.new
plugin.map 'wserver :host'
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