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Add wicked_pdf_url_base64. #947

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Oct 30, 2020
Merged

Add wicked_pdf_url_base64. #947

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14 changes: 14 additions & 0 deletions lib/wicked_pdf/wicked_pdf_helper/assets.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,20 @@ def wicked_pdf_asset_base64(path)
"data:#{asset.content_type};base64,#{Rack::Utils.escape(base64)}"
end

# Using `image_tag` with URLs when generating PDFs (specifically large PDFs with lots of pages) can cause buffer/stack overflows.
#
def wicked_pdf_url_base64(url)
response = Net::HTTP.get_response(URI(url))

if response.is_a?(Net::HTTPSuccess)
base64 = Base64.encode64(response.body).gsub(/\s+/, '')
"data:#{response.content_type};base64,#{Rack::Utils.escape(base64)}"
else
Rails.logger.warn("[wicked_pdf] #{response.code} #{response.message}: #{url}")
nil
end
end

def wicked_pdf_stylesheet_link_tag(*sources)
stylesheet_contents = sources.collect do |source|
source = WickedPdfHelper.add_extension(source, 'css')
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