124 lines
4.8 KiB
Ruby
124 lines
4.8 KiB
Ruby
class GeocoderController < ApplicationController
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layout 'site'
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require 'net/http'
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require 'rexml/document'
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def search
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@postcode_arr = []
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unless params[:query][:postcode].empty?
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postcode = params[:query][:postcode].upcase
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escaped_postcode = postcode.sub(/\s/,'%20')
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if postcode.match(/(^\d{5}$)|(^\d{5}-\d{4}$)/)
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# Its a zip code - ask geocoder.us
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# (They have a non commerical use api)
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Net::HTTP.start('rpc.geocoder.us') do |http|
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resp = http.get("/service/csv?zip=#{postcode}")
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if resp.body.match(/couldn't find this zip/)
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redirect_to "/index.html?error=invalid_zip_code"
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return
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end
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data = resp.body.split(/, /) # lat,long,town,state,zip
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lat = data[0]
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lon = data[1]
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redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
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return
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end
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elsif postcode.match(/^([A-Z]{1,2}\d+[A-Z]?\s*\d[A-Z]{2})/)
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# It matched our naive UK postcode regexp
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# Ask npemap to do a combined npemap + freethepostcode search
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Net::HTTP.start('www.npemap.org.uk') do |http|
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resp = http.get("/cgi/geocoder.fcgi?format=text&postcode=#{escaped_postcode}")
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dataline = resp.body.split(/\n/)[1]
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data = dataline.split(/,/) # easting,northing,postcode,lat,long
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lat = data[3]
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lon = data[4]
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redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
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return
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end
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elsif postcode.match(/^[A-Z]\d[A-Z]\s*\d[A-Z]\d/)
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# It's a canadian postcode
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# Ask geocoder.ca (note - they have a per-day limit)
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postcode = postcode.sub(/\s/,'')
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Net::HTTP.start('geocoder.ca') do |http|
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resp = http.get("?geoit=XML&postal=#{postcode}")
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data_lat = resp.body.slice(/latt>.*?</)
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data_lon = resp.body.slice(/longt>.*?</)
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lat = data_lat.split(/[<>]/)[1]
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lon = data_lon.split(/[<>]/)[1]
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redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
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return
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end
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elsif postcode.match(/(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKS-UW]) [0-9][ABD-HJLNP-UW-Z]{2})
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/)
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#its a UK postcode
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begin
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Net::HTTP.start('www.freethepostcode.org') do |http|
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resp = http.get("/geocode?postcode=#{postcode}")
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lat = resp.body.scan(/[4-6][0-9]\.?[0-9]+/)
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lon = resp.body.scan(/[-+][0-9]\.?[0-9]+/)
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redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
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return
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end
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rescue
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redirect_to "/index.html"
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#redirect to somewhere else
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end
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redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
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#redirect_to "/index.html?error=unknown_postcode_or_zip"
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elsif
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# Some other postcode / zip code
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# Throw it at geonames, and see if they have any luck with it
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Net::HTTP.start('ws.geonames.org') do |http|
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resp = http.get("/postalCodeSearch?postalcode=#{escaped_postcode}&maxRows=1")
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hits = resp.body.slice(/totalResultsCount>.*?</).split(/[<>]/)[1]
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if hits == "0"
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# Geonames doesn't know, it's probably wrong
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redirect_to "/index.html?error=unknown_postcode_or_zip"
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return
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end
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data_lat = resp.body.slice(/lat>.*?</)
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data_lon = resp.body.slice(/lng>.*?</)
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lat = data_lat.split(/[<>]/)[1]
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lon = data_lon.split(/[<>]/)[1]
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redirect_to "/index.html?lat=#{lat}&lon=#{lon}&zoom=14"
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end
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else
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# Some other postcode / zip file
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redirect_to "/index.html?error=unknown_postcode_or_zip"
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return
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end
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end
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if params[:query][:place_name]
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@place_name = params[:query][:place_name]
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redirect_to :controller => 'geocoder', :action => 'results', :params => {:place_name => @place_name}
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end
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end
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def results
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@place_name = params[:place_name]
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res_hash = {}
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@res_ary = []
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begin
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Net::HTTP.start('ws.geonames.org') do |http|
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res = http.get("/search?q=#{@place_name}&maxRows=10")
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xml = REXML::Document.new(res.body)
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xml.elements.each("geonames/geoname") do |ele|
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res_hash = {}
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ele.elements.each("name"){ |n| res_hash['name'] = n.text }
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ele.elements.each("countryCode"){ |n| res_hash['countrycode'] = n.text }
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ele.elements.each("countryName"){ |n| res_hash['countryname'] = n.text }
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ele.elements.each("lat"){ |n| res_hash['lat'] = n.text }
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ele.elements.each("lng"){ |n| res_hash['lon']= n.text }
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@res_ary << res_hash
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end
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end
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rescue
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#Flash a notice to say that geonames is broken
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redirect_to "/index.html"
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end
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end
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end
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