Rails 2.3.8呈现一个html为pdf

Question

我正在使用Prawn pdf库但是我正在做一个复杂的设计，所以我需要一个快速的解决方案，以将html转换为pdf文件。

在此先感谢

Answer 1

我会与wicked_pdf红宝石的宝石，它的自由结合使用wkhtmltopdf shell工具 ，并使用QtWebKit的渲染你的HTML到PDF。例如，还为图表执行JavaScript。你可以找到有关安装的详细信息：https://github.com/mileszs/wicked_pdf

Answer 2

我有一个已经使用PrinceXML生产了几年的一个Rails应用程序。这是一个昂贵的 - 服务器许可证大约4K美元 - 但在PDF文件中呈现HTML + CSS做得非常好。我没有看过较新的解决方案，因为这个解决方案付费并且工作得很好。

对于它的价值，这里的一些代码，我适应from Subimage Interactive进行转换简单：

的lib/prince.rb

# Prince XML Ruby interface. 
# http://www.princexml.com 
# 
# Library by Subimage Interactive - http://www.subimage.com 
# 
# 
# USAGE 
# ----------------------------------------------------------------------------- 
# prince = Prince.new() 
# html_string = render_to_string(:template => 'some_document') 
# send_data(
#  prince.pdf_from_string(html_string), 
#  :filename => 'some_document.pdf' 
#  :type => 'application/pdf' 
# ) 
# 

class Prince 

    attr_accessor :exe_path, :style_sheets, :log_file 

    # Initialize method 
    # 
    def initialize() 
    # Finds where the application lives, so we can call it. 
    @exe_path = '/usr/local/bin/prince' 
    case Rails.env 
    when 'production', 'staging' 
     # use default hard-coded path 
    else 
     if File.exist?(@exe_path) 
     # use default hard-coded path 
     else 
     @exe_path = `which prince`.chomp 
     end 
    end 
    @style_sheets = '' 
    @log_file = "#{::Rails.root}/log/prince.log" 
    end 

    # Sets stylesheets... 
    # Can pass in multiple paths for css files. 
    # 
    def add_style_sheets(*sheets) 
    for sheet in sheets do 
     @style_sheets << " -s #{sheet} " 
    end 
    end 

    # Returns fully formed executable path with any command line switches 
    # we've set based on our variables. 
    # 
    def exe_path 
    # Add any standard cmd line arguments we need to pass 
    @exe_path << " --input=html --server --log=#{@log_file} " 
    @exe_path << @style_sheets 
    return @exe_path 
    end 

    # Makes a pdf from a passed in string. 
    # 
    # Returns PDF as a stream, so we can use send_data to shoot 
    # it down the pipe using Rails. 
    # 
    def pdf_from_string(string) 
    path = self.exe_path() 
    # Don't spew errors to the standard out...and set up to take IO 
    # as input and output 
    path << ' --silent - -o -' 

    # Show the command used... 
    #logger.info "\n\nPRINCE XML PDF COMMAND" 
    #logger.info path 
    #logger.info '' 

    # Actually call the prince command, and pass the entire data stream back. 
    pdf = IO.popen(path, "w+") 
    pdf.puts(string) 
    pdf.close_write 
    output = pdf.gets(nil) 
    pdf.close_read 
    return output 
    end 
end 

的lib/pdf_helper.rb

module PdfHelper 
    require 'prince' 

    private 
    def make_pdf(template_path, pdf_name, stylesheets = [], skip_base_pdf_stylesheet = false) 
     # application notices should never be included in PDFs, pull them from session here 
     notices = nil 
     if !flash.now[:notice].nil? 
     notices = flash.now[:notice] 
     flash.now[:notice] = nil 
     end 
     if !flash[:notice].nil? 
     notices = '' if notices.nil? 
     notices << flash[:notice] 
     flash[:notice] = nil 
     end 

     prince = Prince.new() 
     # Sets style sheets on PDF renderer. 
     stylesheet_base = "#{::Rails.root}/public/stylesheets" 
     prince.add_style_sheets(
     "#{stylesheet_base}/application.css", 
     "#{stylesheet_base}/print.css" 
    ) 
     prince.add_style_sheets("#{stylesheet_base}/pdf.css") unless skip_base_pdf_stylesheet 
     if 0 < stylesheets.size 
     stylesheets.each { |s| prince.add_style_sheets("#{stylesheet_base}/#{s}.css") } 
     end 

     # Set RAILS_ASSET_ID to blank string or rails appends some time after 
     # to prevent file caching, messing up local - disk requests. 
     ENV['RAILS_ASSET_ID'] = '' 
     html_string = render_to_string(:template => template_path, :layout => 'application') 
     # Make all paths relative, on disk paths... 
     html_string.gsub!("src=\"", "src=\"#{::Rails.root}/public") 
     html_string.gsub!("src=\"#{::Rails.root}/public#{::Rails.root}", "src=\"#{::Rails.root}") 

     # re-insert any application notices into the session 
     if !notices.nil? 
     flash[:notice] = notices 
     end 

     return prince.pdf_from_string(html_string) 
    end 

    def make_and_send_pdf(template_path, pdf_name, stylesheets = [], skip_base_pdf_stylesheet = false) 
     send_data(
     make_pdf(template_path, pdf_name, stylesheets, skip_base_pdf_stylesheet), 
     :filename => pdf_name, 
     :type => 'application/pdf' 
    ) 
    end 
end 

样本控制器动作

include PdfHelper 
def pdf 
    index 
    make_and_send_pdf '/ads/index', "#{filename}.pdf" 
end 

Answer 3

您可以直接使用acts_as_flying_saucer library.For头现有的HTML转换为PDF和页脚，你可以参考 https://github.com/amardaxini/acts_as_flying_saucer/wiki/PDF-Header-Footer