Class: HTMLRender::Renderers::HTTPRenderer

Inherits:
Base
  • Object
show all
Defined in:
lib/html_render/renderers.rb

Overview

Renders using an HTTP server built for the very purpose.

One should POST the HTML to the given URL, and the server should respond with a PNG image.

Defined Under Namespace

Classes: ServerError

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url) ⇒ HTTPRenderer

Returns a new instance of HTTPRenderer.



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# File 'lib/html_render/renderers.rb', line 22

def initialize(url)
  @url = url
end

Instance Attribute Details

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/html_render/renderers.rb', line 20

def url
  @url
end

Instance Method Details

#render(html) ⇒ Object 



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# File 'lib/html_render/renderers.rb', line 26

def render(html)
  client = HTTPClient.new

  begin
    response = client.post(url, html, {
      'Content-Type' => 'application/x-www-form-urlencoded; charset=UTF-8'
    })
  rescue HTTPClient::BadResponseError => e
    raise ServerError.new("Bad response from #{url}: #{e.message}")
  rescue HTTPClient::TimeoutError => e
    raise ServerError.new("Timeout from #{url}: #{e.message}")
  rescue HTTPClient::RetryableResponse => e
    raise ServerError.new("Retryable response from #{url}: #{e.message}")
  rescue HTTPClient::KeepAliveDisconnected => e
    raise ServerError.new("Keep-Alive disconnected from #{url}: #{e.message}")
  end

  if response.status != 200
    raise ServerError.new("Unexpected HTTP server response from #{url}: #{response.inspect}")
  end

  HTMLRender::Images::PNGImage.new(response.content)
end