Sha256: 69257b07ac0978123315b0ef2a8feb9b955f613e123db1d3bd04ba01f1de4b98
Contents?: true
Size: 1.87 KB
Versions: 10
Compression:
Stored size: 1.87 KB
Contents
# ----------------------------------------------------------------------------- # # SRS database interface # # ----------------------------------------------------------------------------- require "net/http" module RGeo module CoordSys module SRSDatabase # A spatial reference database implementation that fetches data from # internet URLs. class UrlReader # Create a URL-based spatial reference database. # # Options: # # [<tt>:cache</tt>] # If set to true, lookup results are cached so if the same URL # is requested again, the result is served from cache rather # than issuing another HTTP request. Default is false. def initialize(opts_ = {}) @cache = opts_[:cache] ? {} : nil end # Retrieve the given URL and return an Entry. # Returns nil if the URL cannot be read as an OGC WKT or Proj4 # coordinate system def get(ident_) ident_ = ident_.to_s return @cache[ident_] if @cache && @cache.include?(ident_) uri_ = ::URI.parse(ident_) result_ = nil ::Net::HTTP.start(uri_.host, uri_.port) do |http_| request_ = uri_.path request_ = "#{request_}?#{uri_.query}" if uri_.query response_ = http_.request_get(request_) if response_.is_a?(::Net::HTTPSuccess) response_ = response_.body.strip if response_[0, 1] == "+" result_ = Entry.new(ident_, proj4: response_) else result_ = Entry.new(ident_, coord_sys: response_) end end end @cache[ident_] = result_ if @cache result_ end # Clear the cache if one is present. def clear_cache @cache.clear if @cache end end end end end
Version data entries
10 entries across 10 versions & 2 rubygems