Class: Grafana::ImageRenderingDatasource

Inherits:
AbstractDatasource show all
Defined in:
lib/grafana/image_rendering_datasource.rb

Overview

Implements the interface to image rendering datasources.

Instance Attribute Summary

Attributes inherited from AbstractDatasource

#model

Instance Method Summary collapse

Methods inherited from AbstractDatasource

build_instance, #category, #default_variable_format, handles?, #id, inherited, #initialize, #name, #raw_query_from_panel_model, #replace_variables, #type, #uid

Constructor Details

This class inherits a constructor from Grafana::AbstractDatasource

Instance Method Details

#request(query_description) ⇒ Object

:raw_query needs to contain a Hash with the following structure:

{
  panel: {Panel} which shall be rendered
}

Raises:

See Also:



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# File 'lib/grafana/image_rendering_datasource.rb', line 12

def request(query_description)
  panel = query_description[:raw_query][:panel]

  webrequest = query_description[:prepared_request]
  webrequest.relative_url = panel.render_url + url_params(query_description)
  webrequest.options.merge!({ accept: 'image/png' })

  result = webrequest.execute(query_description[:timeout])

  raise ImageCouldNotBeRenderedError, panel if result.body.include?('<html')

  { header: ['image'], content: [result.body] }
end