class GeocoderController < ApplicationController
- require 'uri'
- require 'net/http'
- require 'rexml/document'
+ require "cgi"
+ require "uri"
+ require "rexml/document"
+
+ before_action :authorize_web
+ before_action :set_locale
+ before_action :require_oauth, :only => [:search]
+ authorize_resource :class => false
def search
- @query = params[:query]
- @results = Array.new
-
- if @query.match(/^\d{5}(-\d{4})?$/)
- @results.push search_us_postcode(@query)
- elsif @query.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])\s*[0-9][ABD-HJLNP-UW-Z]{2})/i)
- @results.push search_uk_postcode(@query)
- elsif @query.match(/[A-Z]\d[A-Z]\s*\d[A-Z]\d/i)
- @results.push search_ca_postcode(@query)
+ @params = normalize_params
+ @sources = []
+
+ if @params[:lat] && @params[:lon]
+ @sources.push(:name => "latlon", :url => root_path)
+ @sources.push(:name => "osm_nominatim_reverse", :url => nominatim_reverse_url(:format => "html"))
+ elsif @params[:query]
+ @sources.push(:name => "osm_nominatim", :url => nominatim_url(:format => "html"))
+ end
+
+ if @sources.empty?
+ head :bad_request
else
- @results.push search_osm_namefinder(@query)
- @results.push search_geonames(@query)
+ render :layout => map_layout
end
end
-private
+ def search_latlon
+ lat = params[:lat].to_f
+ lon = params[:lon].to_f
- def search_us_postcode(query)
- results = Array.new
+ if params[:latlon_digits]
+ # We've got two nondescript numbers for a query, which can mean both "lat, lon" or "lon, lat".
+ @results = []
- # ask geocoder.us (they have a non-commercial use api)
- response = fetch_text("http://rpc.geocoder.us/service/csv?zip=#{URI.escape(query)}")
+ if lat >= -90 && lat <= 90 && lon >= -180 && lon <= 180
+ @results.push(:lat => params[:lat], :lon => params[:lon],
+ :zoom => params[:zoom],
+ :name => "#{params[:lat]}, #{params[:lon]}")
+ end
- # parse the response
- unless response.match(/couldn't find this zip/)
- data = response.split(/\s*,\s+/) # lat,long,town,state,zip
- results.push({:lat => data[0], :lon => data[1], :zoom => 12,
- :prefix => "#{data[2]}, #{data[3]}, ",
- :name => data[4]})
- end
+ if lon >= -90 && lon <= 90 && lat >= -180 && lat <= 180
+ @results.push(:lat => params[:lon], :lon => params[:lat],
+ :zoom => params[:zoom],
+ :name => "#{params[:lon]}, #{params[:lat]}")
+ end
- return { :source => "Geocoder.us", :url => "http://geocoder.us/", :results => results }
- rescue Exception => ex
- return { :source => "Geocoder.us", :url => "http://geocoder.us/", :error => "Error contacting rpc.geocoder.us: #{ex.to_s}" }
+ if @results.empty?
+ @error = "Latitude or longitude are out of range"
+ render :action => "error"
+ else
+ render :action => "results"
+ end
+ else
+ # Coordinates in a query have come with markers for latitude and longitude.
+ if lat < -90 || lat > 90
+ @error = "Latitude #{lat} out of range"
+ render :action => "error"
+ elsif lon < -180 || lon > 180
+ @error = "Longitude #{lon} out of range"
+ render :action => "error"
+ else
+ @results = [{ :lat => params[:lat], :lon => params[:lon],
+ :zoom => params[:zoom],
+ :name => "#{params[:lat]}, #{params[:lon]}" }]
+
+ render :action => "results"
+ end
+ end
end
- def search_uk_postcode(query)
- results = Array.new
+ def search_osm_nominatim
+ # ask nominatim
+ response = fetch_xml(nominatim_url(:format => "xml"))
+
+ # extract the results from the response
+ results = response.elements["searchresults"]
+
+ # create result array
+ @results = []
- # ask npemap.org.uk to do a combined npemap + freethepostcode search
- response = fetch_text("http://www.npemap.org.uk/cgi/geocoder.fcgi?format=text&postcode=#{URI.escape(query)}")
+ # create parameter hash for "more results" link
+ @more_params = params
+ .permit(:query, :minlon, :minlat, :maxlon, :maxlat, :exclude)
+ .merge(:exclude => results.attributes["exclude_place_ids"])
# parse the response
- unless response.match(/Error/)
- dataline = response.split(/\n/)[1]
- data = dataline.split(/,/) # easting,northing,postcode,lat,long
- results.push({:lat => data[3], :lon => data[4], :zoom => 12,
- :name => data[2].gsub(/'/, "")})
+ results.elements.each("place") do |place|
+ lat = place.attributes["lat"]
+ lon = place.attributes["lon"]
+ klass = place.attributes["class"]
+ type = place.attributes["type"]
+ name = place.attributes["display_name"]
+ min_lat, max_lat, min_lon, max_lon = place.attributes["boundingbox"].split(",")
+ prefix_name = if type.empty?
+ ""
+ else
+ t "geocoder.search_osm_nominatim.prefix.#{klass}.#{type}", :default => type.tr("_", " ").capitalize
+ end
+ if klass == "boundary" && type == "administrative"
+ rank = (place.attributes["address_rank"].to_i + 1) / 2
+ prefix_name = t "geocoder.search_osm_nominatim.admin_levels.level#{rank}", :default => prefix_name
+ place.elements["extratags"].elements.each("tag") do |extratag|
+ prefix_name = t "geocoder.search_osm_nominatim.prefix.place.#{extratag.attributes['value']}", :default => prefix_name if extratag.attributes["key"] == "linked_place" || extratag.attributes["key"] == "place"
+ end
+ end
+ prefix = t ".prefix_format", :name => prefix_name
+ object_type = place.attributes["osm_type"]
+ object_id = place.attributes["osm_id"]
+
+ @results.push(:lat => lat, :lon => lon,
+ :min_lat => min_lat, :max_lat => max_lat,
+ :min_lon => min_lon, :max_lon => max_lon,
+ :prefix => prefix, :name => name,
+ :type => object_type, :id => object_id)
end
- return { :source => "NPEMap / FreeThePostcode", :url => "http://www.npemap.org.uk/", :results => results }
- rescue Exception => ex
- return { :source => "NPEMap / FreeThePostcode", :url => "http://www.npemap.org.uk/", :error => "Error contacting www.npemap.org.uk: #{ex.to_s}" }
+ render :action => "results"
+ rescue StandardError => e
+ host = URI(Settings.nominatim_url).host
+ @error = "Error contacting #{host}: #{e}"
+ render :action => "error"
end
- def search_ca_postcode(query)
- results = Array.new
+ def search_osm_nominatim_reverse
+ # get query parameters
+ zoom = params[:zoom]
+
+ # create result array
+ @results = []
- # ask geocoder.ca (note - they have a per-day limit)
- response = fetch_xml("http://geocoder.ca/?geoit=XML&postal=#{URI.escape(query)}")
+ # ask nominatim
+ response = fetch_xml(nominatim_reverse_url(:format => "xml"))
# parse the response
- unless response.get_elements("geodata/error")
- results.push({:lat => response.get_text("geodata/latt").to_s,
- :lon => response.get_text("geodata/longt").to_s,
- :zoom => 12,
- :name => query.upcase})
+ response.elements.each("reversegeocode/result") do |result|
+ lat = result.attributes["lat"]
+ lon = result.attributes["lon"]
+ object_type = result.attributes["osm_type"]
+ object_id = result.attributes["osm_id"]
+ description = result.text
+
+ @results.push(:lat => lat, :lon => lon,
+ :zoom => zoom,
+ :name => description,
+ :type => object_type, :id => object_id)
end
- return { :source => "Geocoder.CA", :url => "http://geocoder.ca/", :results => results }
- rescue Exception => ex
- return { :source => "Geocoder.CA", :url => "http://geocoder.ca/", :error => "Error contacting geocoder.ca: #{ex.to_s}" }
+ render :action => "results"
+ rescue StandardError => e
+ host = URI(Settings.nominatim_url).host
+ @error = "Error contacting #{host}: #{e}"
+ render :action => "error"
end
- def search_osm_namefinder(query)
- results = Array.new
+ private
- # ask OSM namefinder
- response = fetch_xml("http://www.frankieandshadow.com/osm/search.xml?find=#{URI.escape(query)}")
+ def nominatim_url(format: nil)
+ # get query parameters
+ query = params[:query]
+ minlon = params[:minlon]
+ minlat = params[:minlat]
+ maxlon = params[:maxlon]
+ maxlat = params[:maxlat]
- # parse the response
- response.elements.each("searchresults/named") do |named|
- lat = named.attributes["lat"].to_s
- lon = named.attributes["lon"].to_s
- zoom = named.attributes["zoom"].to_s
- place = named.elements["place/named"] || named.elements["nearestplaces/named"]
- type = named.attributes["info"].to_s.capitalize
- name = named.attributes["name"].to_s
- description = named.elements["description"].to_s
- if place
- distance = format_distance(place.attributes["approxdistance"].to_i)
- direction = format_direction(place.attributes["direction"].to_i)
- placename = place.attributes["name"].to_s
- results.push({:lat => lat, :lon => lon, :zoom => zoom,
- :prefix => "#{type} ", :name => name,
- :suffix => ", #{distance} #{direction} of #{placename}",
- :description => description})
- else
- results.push({:lat => lat, :lon => lon, :zoom => zoom,
- :prefix => "#{type} ", :name => name,
- :description => description})
- end
- end
+ # get view box
+ viewbox = "&viewbox=#{minlon},#{maxlat},#{maxlon},#{minlat}" if minlon && minlat && maxlon && maxlat
+
+ # get objects to excude
+ exclude = "&exclude_place_ids=#{params[:exclude]}" if params[:exclude]
- return { :source => "OpenStreetMap Namefinder", :url => "http://www.frankieandshadow.com/osm/", :results => results }
- rescue Exception => ex
- return { :source => "OpenStreetMap Namefinder", :url => "http://www.frankieandshadow.com/osm/", :error => "Error contacting www.frankieandshadow.com: #{ex.to_s}" }
+ # build url
+ "#{Settings.nominatim_url}search?format=#{format}&extratags=1&q=#{escape_query(query)}#{viewbox}#{exclude}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}"
end
- def search_geonames(query)
- results = Array.new
+ def nominatim_reverse_url(format: nil)
+ # get query parameters
+ lat = params[:lat]
+ lon = params[:lon]
+ zoom = params[:zoom]
- # ask geonames.org
- response = fetch_xml("http://ws.geonames.org/search?q=#{URI.escape(query)}&maxRows=20")
+ # build url
+ "#{Settings.nominatim_url}reverse?format=#{format}&lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{http_accept_language.user_preferred_languages.join(',')}"
+ end
- # parse the response
- response.elements.each("geonames/geoname") do |geoname|
- lat = geoname.get_text("lat").to_s
- lon = geoname.get_text("lng").to_s
- name = geoname.get_text("name").to_s
- country = geoname.get_text("countryName").to_s
- results.push({:lat => lat, :lon => lon, :zoom => 12,
- :name => name,
- :suffix => ", #{country}"})
+ def fetch_text(url)
+ response = OSM.http_client.get(URI.parse(url))
+
+ if response.success?
+ response.body
+ else
+ raise response.status.to_s
end
+ end
- return { :source => "GeoNames", :url => "http://www.geonames.org/", :results => results }
- rescue Exception => ex
- return { :source => "GeoNames", :url => "http://www.geonames.org/", :error => "Error contacting ws.geonames.org: #{ex.to_s}" }
+ def fetch_xml(url)
+ REXML::Document.new(fetch_text(url))
end
- def fetch_text(url)
- return Net::HTTP.get(URI.parse(url))
+ def escape_query(query)
+ CGI.escape(query)
end
- def fetch_xml(url)
- return REXML::Document.new(fetch_text(url))
+ def normalize_params
+ if query = params[:query]
+ query.strip!
+
+ if latlon = query.match(/^(?<ns>[NS])\s*#{dms_regexp('ns')}\W*(?<ew>[EW])\s*#{dms_regexp('ew')}$/) ||
+ query.match(/^#{dms_regexp('ns')}\s*(?<ns>[NS])\W*#{dms_regexp('ew')}\s*(?<ew>[EW])$/)
+ params.merge!(to_decdeg(latlon.named_captures.compact)).delete(:query)
+
+ elsif latlon = query.match(%r{^(?<lat>[+-]?\d+(?:\.\d+)?)(?:\s+|\s*[,/]\s*)(?<lon>[+-]?\d+(?:\.\d+)?)$})
+ params.merge!(:lat => latlon["lat"], :lon => latlon["lon"]).delete(:query)
+
+ params[:latlon_digits] = true
+ end
+ end
+
+ params.permit(:query, :lat, :lon, :latlon_digits, :zoom, :minlat, :minlon, :maxlat, :maxlon)
end
- def format_distance(distance)
- return "less than 1km" if distance == 0
- return "about #{distance}km"
+ def dms_regexp(name_prefix)
+ /
+ (?: (?<#{name_prefix}d>\d{1,3}(?:\.\d+)?)°? ) |
+ (?: (?<#{name_prefix}d>\d{1,3})°?\s*(?<#{name_prefix}m>\d{1,2}(?:\.\d+)?)['′]? ) |
+ (?: (?<#{name_prefix}d>\d{1,3})°?\s*(?<#{name_prefix}m>\d{1,2})['′]?\s*(?<#{name_prefix}s>\d{1,2}(?:\.\d+)?)["″]? )
+ /x
end
- def format_direction(bearing)
- return "south-west" if bearing >= 22.5 and bearing < 67.5
- return "south" if bearing >= 67.5 and bearing < 112.5
- return "south-east" if bearing >= 112.5 and bearing < 157.5
- return "east" if bearing >= 157.5 and bearing < 202.5
- return "north-east" if bearing >= 202.5 and bearing < 247.5
- return "north" if bearing >= 247.5 and bearing < 292.5
- return "north-west" if bearing >= 292.5 and bearing < 337.5
- return "west"
+ def to_decdeg(captures)
+ ns = captures.fetch("ns").casecmp?("s") ? -1 : 1
+ nsd = BigDecimal(captures.fetch("nsd", "0"))
+ nsm = BigDecimal(captures.fetch("nsm", "0"))
+ nss = BigDecimal(captures.fetch("nss", "0"))
+
+ ew = captures.fetch("ew").casecmp?("w") ? -1 : 1
+ ewd = BigDecimal(captures.fetch("ewd", "0"))
+ ewm = BigDecimal(captures.fetch("ewm", "0"))
+ ews = BigDecimal(captures.fetch("ews", "0"))
+
+ lat = ns * (nsd + (nsm / 60) + (nss / 3600))
+ lon = ew * (ewd + (ewm / 60) + (ews / 3600))
+
+ { :lat => lat.round(6).to_s("F"), :lon => lon.round(6).to_s("F") }
end
end
projects / rails.git / blobdiff