Class: GeoMonitor::Requests::WMS

Inherits:
Object
  • Object
show all
Defined in:
lib/geo_monitor/requests/wms.rb

Overview

Crafts a WMS request

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(bbox:, url:, layers:) ⇒ WMS

Returns a new instance of WMS.


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# File 'lib/geo_monitor/requests/wms.rb', line 8

def initialize(bbox:, url:, layers:)
  @bbox = bbox
  @url = url
  @layers = layers
end

Instance Attribute Details

#bbox ⇒ Object (readonly)

Returns the value of attribute bbox.


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# File 'lib/geo_monitor/requests/wms.rb', line 6

def bbox
  @bbox
end

#layers ⇒ Object (readonly)

Returns the value of attribute layers.


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# File 'lib/geo_monitor/requests/wms.rb', line 6

def layers
  @layers
end

#url ⇒ Object (readonly)

Returns the value of attribute url.


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# File 'lib/geo_monitor/requests/wms.rb', line 6

def url
  @url
end

Instance Method Details

#request_params ⇒ Object

Parameters used for the WMS request.


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# File 'lib/geo_monitor/requests/wms.rb', line 16

def request_params
  {
    'SERVICE' => 'WMS',
    'VERSION' => '1.1.1',
    'REQUEST' => 'GetMap',
    'LAYERS' => layers,
    'STYLES' => '',
    'CRS' => 'EPSG:900913',
    'SRS' => 'EPSG:3857',
    'BBOX' => bbox.tile_bounds.to_s,
    'WIDTH' => '256',
    'HEIGHT' => '256',
    'FORMAT' => 'image/png',
    'TILED' => true
  }
end

#tile ⇒ Object

Request the tile.


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# File 'lib/geo_monitor/requests/wms.rb', line 35

def tile
  unless url.present?
    return ::GeoMonitor::FailedResponse.new(
      { url: url }, 'No URL provided', {}
    )
  end
  conn = Faraday.new(url: url)
  begin
    conn.get do |request|
      request.params = request_params
      request.options.timeout = 10
      request.options.open_timeout = 10
    end
  rescue Faraday::ConnectionFailed, Faraday::TimeoutError => e
    ::GeoMonitor::FailedResponse.new(
      { url: conn.url_prefix.to_s },
      e.class,
      nil
    )
  end
end