prismic-htmlSerializer.rb

resolver = Prismic.link_resolver('master'){ |doc_link| "http:#localhost/#{doc_link.id}" }
serializer = Prismic.html_serializer do |element, html|
  if element.is_a?(Prismic::Fragments::StructuredText::Block::Image)
    # Don't wrap images in a <p> tag
    %(<img src="#{element.url}" alt="#{element.alt}" width="#{element.width}" height="#{element.height}" />)
  else
    nil
  end
end
doc = response.results[0]
html = doc['blog-post.body'].as_html(resolver, serializer)