class Mechanize::Page::Image

An image element on an HTML page

Attributes

mech[RW]
node[R]
page[RW]

Public Class Methods

new(node, page) click to toggle source

Creates a new Mechanize::Page::Image from an image node and source page.

# File lib/mechanize/page/image.rb, line 14
def initialize node, page
  @node = node
  @page = page
  @mech = page.mech
end

Public Instance Methods

alt() click to toggle source

The alt attribute of the image

# File lib/mechanize/page/image.rb, line 23
def alt
  node['alt']
end
caption() click to toggle source

The caption of the image. In order of preference, the title, alt, or empty string “”.

# File lib/mechanize/page/image.rb, line 31
def caption
  title || alt || ''
end
Also aliased as: text
dom_class() click to toggle source

The class attribute of the image

# File lib/mechanize/page/image.rb, line 40
def dom_class
  node['class']
end
dom_id() click to toggle source

The id attribute of the image

# File lib/mechanize/page/image.rb, line 47
def dom_id
  node['id']
end
extname() click to toggle source

The suffix of the url. The dot is a part of suffix, not a delimiter.

p image.url     # => "http://example/test.jpg"
p image.extname # => ".jpg"

Returns an empty string if url has no suffix:

p image.url     # => "http://example/sampleimage"
p image.extname # => ""
# File lib/mechanize/page/image.rb, line 62
def extname
  return nil unless src

  File.extname url.path
end
fetch(parameters = [], referer = nil, headers = {}) click to toggle source

Downloads the image.

agent.page.image_with(:src => /logo/).fetch.save

The referer is:

page(“parent”)

all images on http html, relative src images on https html

(no referer)

absolute src images on https html

user specified

img.fetch(nil, my_referer_uri_or_page)

# File lib/mechanize/page/image.rb, line 82
def fetch parameters = [], referer = nil, headers = {}
  mech.get src, parameters, referer || image_referer, headers
end
height() click to toggle source

The height attribute of the image

# File lib/mechanize/page/image.rb, line 89
def height
  node['height']
end
mime_type() click to toggle source

MIME type guessed from the image url suffix

p image.extname   # => ".jpg"
p image.mime_type # => "image/jpeg"
page.images_with(:mime_type => /gif|jpeg|png/).each do ...

Returns nil if url has no (well-known) suffix:

p image.url       # => "http://example/sampleimage"
p image.mime_type # => nil
# File lib/mechanize/page/image.rb, line 117
def mime_type
  suffix_without_dot = extname ? extname.sub(/\A\./){''}.downcase : nil

  Mechanize::Util::DefaultMimeTypes[suffix_without_dot]
end
src() click to toggle source

The src attribute of the image

# File lib/mechanize/page/image.rb, line 139
def src
  node['src']
end
text()
Alias for: caption
title() click to toggle source

The title attribute of the image

# File lib/mechanize/page/image.rb, line 146
def title
  node['title']
end
to_s() click to toggle source

The URL string of this image

# File lib/mechanize/page/image.rb, line 153
def to_s
  url.to_s
end
url() click to toggle source

URI for this image

# File lib/mechanize/page/image.rb, line 160
def url
  if relative? then
    if page.bases[0] then
      page.bases[0].href + src
    else
      page.uri + Mechanize::Util.uri_escape(src)
    end
  else
    URI Mechanize::Util.uri_escape(src)
  end
end
width() click to toggle source

The width attribute of the image

# File lib/mechanize/page/image.rb, line 175
def width
  node['width']
end