Sha256: 1244e4026538cd06a6b93a5e3decc46c64b62e5363f8df34556450ad91bff411
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Size: 1.5 KB
Versions: 11
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Contents
require 'uri'
module HTML
class Pipeline
class AbsoluteSourceFilter < Filter
# HTML Filter for replacing relative and root relative image URLs with
# fully qualified URLs
#
# This is useful if an image is root relative but should really be going
# through a cdn, or if the content for the page assumes the host is known
# i.e. scraped webpages and some RSS feeds.
#
# Context options:
# :image_base_url - Base URL for image host for root relative src.
# :image_subpage_url - For relative src.
#
# This filter does not write additional information to the context.
# This filter would need to be run before CamoFilter.
def call
doc.search('img').each do |element|
next if element['src'].nil? || element['src'].empty?
src = element['src'].strip
next if src.start_with? 'http'
base = if src.start_with? '/'
image_base_url
else
image_subpage_url
end
element['src'] = URI.join(base, src).to_s
end
doc
end
# Private: the base url you want to use
def image_base_url
context[:image_base_url] || raise("Missing context :image_base_url for #{self.class.name}")
end
# Private: the relative url you want to use
def image_subpage_url
context[:image_subpage_url] || raise("Missing context :image_subpage_url for #{self.class.name}")
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems