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require 'uri'
module Banzai
module Filter
# HTML filter that "fixes" relative upload links to files.
# Context options:
# :project (required) - Current project
#
class UploadLinkFilter < HTML::Pipeline::Filter
def call
return doc unless project || group
doc.xpath('descendant-or-self::a[starts-with(@href, "/uploads/")]').each do |el|
process_link_attr el.attribute('href')
end
doc.xpath('descendant-or-self::img[starts-with(@src, "/uploads/")]').each do |el|
process_link_attr el.attribute('src')
end
doc
end
protected
def process_link_attr(html_attr)
html_attr.value = build_url(html_attr.value).to_s
end
def build_url(uri)
base_path = Gitlab.config.gitlab.url
if group
urls = Gitlab::Routing.url_helpers
# we need to get last 2 parts of the uri which are secret and filename
uri_parts = uri.split(File::SEPARATOR)
file_path = urls.show_group_uploads_path(group, uri_parts[-2], uri_parts[-1])
File.join(base_path, file_path)
else
File.join(base_path, project.full_path, uri)
end
end
def project
context[:project]
end
def group
context[:group]
end
# Ensure that a :project key exists in context
#
# Note that while the key might exist, its value could be nil!
def validate
needs :project
end
end
end
end
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