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Web ページに埋め込まれた PDF からテキストを抽出しようとしています。pdf-reader gem を使用してみましたが、解析エラーが発生します。

`find_first_xref_offset': PDF does not contain EOF marker (PDF::Reader::MalformedPDFError)
from /opt/boxen/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/pdf-reader-1.3.3/lib/pdf/reader/xref.rb:99:in `load_offsets'
from /opt/boxen/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/pdf-reader-1.3.3/lib/pdf/reader/xref.rb:60:in `initialize'
from /opt/boxen/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/pdf-reader-1.3.3/lib/pdf/reader/object_hash.rb:44:in `new'
from /opt/boxen/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/pdf-reader-1.3.3/lib/pdf/reader/object_hash.rb:44:in `initialize'
from /opt/boxen/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/pdf-reader-1.3.3/lib/pdf/reader.rb:117:in `new'
from /opt/boxen/rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/pdf-reader-1.3.3/lib/pdf/reader.rb:117:in `initialize'
from role.rb:5:in `new'
from role.rb:5:in `<main>'

これはファイルです

これを修正する方法を知っている人はいますか？この目的のためのより良い宝石はありますか?

ありがとう

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1 に答える 1

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あなたの問題を Google で調べているときに、これを見つけました。問題を解決するために使用できるものを提供する可能性がありますか?

#################################################################
# Extract text from a PDF file
# This scraper takes about 2 minutes to run and no output
# appears until the end.
#################################################################
# This scraper uses the pdf-reader gem.
# Documentation is at https://github.com/yob/pdf-reader#readme
# If you have problems you can ask for help at http://groups.google.com/group/pdf-reader
require 'pdf-reader'   
require 'open-uri'

##########  This section contains the callback code that processes the PDF file contents  ######
class PageTextReceiver
  attr_accessor :content, :page_counter
  def initialize
    @content = []
    @page_counter = 0
  end
  # Called when page parsing starts
  def begin_page(arg = nil)
    @page_counter += 1
    @content << ""
  end
  # record text that is drawn on the page
  def show_text(string, *params)
    @content.last << string
  end
  # there's a few text callbacks, so make sure we process them all
  alias :super_show_text :show_text
  alias :move_to_next_line_and_show_text :show_text
  alias :set_spacing_next_line_show_text :show_text
  # this final text callback takes slightly different arguments
  def show_text_with_positioning(*params)
    params = params.first
    params.each { |str| show_text(str) if str.kind_of?(String)}
  end
end
################  End of TextReceiver #############################

# If you don't have two minutes to wait you might prefer this
# smaller pdf
# pdf = open('http://www.hmrc.gov.uk/factsheets/import-export.pdf')
# pdf = open('http://www.madingley.org/uploaded/Hansard_08.07.2010.pdf') 
pdf = open('http://dl.dropbox.com/u/6928078/CLEI_2008_002.pdf')

#######  Instantiate the receiver and the reader
receiver = PageTextReceiver.new
pdf_reader = PDF::Reader.new 
#######  Now you just need to make the call to parse...
pdf_reader.parse(pdf, receiver)
#######  ...and do whatever you want with the text.  
#######  This just outputs it.
receiver.content.each {|r| puts r.strip}
于 2013-12-11T11:52:27.203 に答える