init project

config/initializers/pdfkit.rb

@@ -0,0 +1,27 @@
+PDFKit.configure do |config|
+  config.wkhtmltopdf = ENV["WKHTMLTOPDF_EXEC"] || 'wkhtmltopdf'
+  # config.wkhtmltopdf = ENV["WKHTMLTOPDF_EXEC"] || '/usr/bin/wkhtmltopdf'
+  config.default_options = {
+      encoding: "UTF-8",
+      page_size: 'A4',
+      print_media_type: true,
+      dpi: 300,
+      debug_javascript: true,
+      javascript_delay: 500,
+      # quiet: false
+      stop_slow_scripts:false,
+      no_stop_slow_scripts: true
+  }
+end
+
+# 原有方法会给所有含 head 标签的地方插入css，导致html类实训代码块渲染异常
+module FixStylesheetAppend
+  def append_stylesheets
+    raise ImproperSourceError.new('Stylesheets may only be added to an HTML source') if stylesheets.any? && !@source.html?
+
+    stylesheets.each do |stylesheet|
+      @source.to_s.insert(0, style_tag_for(stylesheet))
+    end
+  end
+end
+PDFKit.prepend(FixStylesheetAppend)