Jay,
I liked your idea of searching for the location id, so I added it to my
original submission. If you use the -s option, it will give you a menu
of choices. If it only finds one choice it will just return the
temperature.
Examples:
c:>ruby c:\current_temp.rb madrid -s
- Madrid, Nebraska, United States
- Madrid, New York, United States
- Madrid, Iowa, United States
- Madrid, Spain
- General La Madrid, Argentina
- New Madrid, Missouri, United States
Please choose your location 4
The current temperature in Madrid, is 37 degrees F.
c:>ruby current_temp.rb “madrid, spain” -s
The current temperature in Madrid, is 37 degrees F.
current_temp.rb
require ‘net/http’
require ‘rexml/document’
require ‘optparse’
require “rubygems”
require “highline/import”
require ‘cgi’
class LocationSearch
attr_reader :loc
def initialize(string)
city = CGI.escape(string)
h = Net::HTTP.new('weather.yahoo.com', 80)
resp, data = h.get("/search/weather2?p=#{city}", nil)
case resp
when Net::HTTPSuccess then @loc = location_menu(
parse_locations(data) )
when Net::HTTPRedirection then @loc =
get_location(resp[‘location’])
end
end
def location_menu(hash)
choose do |menu|
menu.prompt = "Please choose your location "
hash.each do |key,val|
menu.choice val do return key end
end
end
end
def parse_locations(data)
a = {}
data.split(“\n”).each do |i|
a[get_location(i)]=strip_html(i) if /a href="/forecast/ =~ i
end
a
end
def strip_html(str)
str = str.strip || ‘’
str.gsub(/<(/|\s)[^>]>/,‘’)
end
def get_location(string)
string.split(//|./)[2]
end
end
class CurrentTemp
include REXML
def initialize(loc,u=‘f’)
uri = “http://xml.weather.yahoo.com/forecastrss?p=#{loc}&u=#{u}”
@doc = Document.new Net::HTTP.get(URI.parse(uri))
raise “Invalid city, "#{loc}"” if /error/i =~
@doc.elements[“//description”].to_s
end
def method_missing(methodname)
XPath.match(@doc,“//*[starts-with(name(), ‘yweather’)]”).each
do|elem|
return elem.attributes[methodname.to_s] if
elem.attributes[methodname.to_s]
end
Object.method_missing(methodname)
end
def unit
self.temperature
end
def state
self.region
end
def to_s
“The current temperature in #{self.city}, #{self.state} is
#{self.temp} degrees #{self.unit}.”
end
end
begin
opts = OptionParser.new
opts.banner = “Usage:\n\n current_temp.rb city [-u unit]\n\n
"
opts.banner += “city should be a zip code, or a Yahoo Weather
location id.\n\n”
opts.on(”-uARG", “–unit ARG”,“Should be f or c”, String) {|val| @u
= val }
opts.on(“-s”, “–search”,“Search location”) {@search = true}
opts.on(“-h”, “–help”) {puts opts.to_s ; exit 0}
loc = opts.parse!.to_s
@u ||=‘f’
if @search
loc = LocationSearch.new(loc).loc
end
if loc.empty?
raise “Invalid city, "#{loc}"”
else
puts
puts CurrentTemp.new(loc,@u)
end
rescue
puts $!
puts opts.to_s
exit 1
end
