How to edit docx with nokogiri and rubyzip - ruby-on-rails

Question

I'm using a combination of rubyzip and nokogiri to edit a .docx file. I'm using rubyzip to unzip the .docx file and then using nokogiri to parse and change the body of the word/document.xml file but ever time I close rubyzip at the end it corrupts the file and I can't open it or repair it. I unzip the .docx file on desktop and check the word/document.xml file and the content is updated to what I changed it to but all the other files are messed up. Could someone help me with this issue? Here is my code:
require 'rubygems'
require 'zip/zip'
require 'nokogiri'
zip = Zip::ZipFile.open("test.docx")
doc = zip.find_entry("word/document.xml")
xml = Nokogiri::XML.parse(doc.get_input_stream)
wt = xml.root.xpath("//w:t", {"w" => "http://schemas.openxmlformats.org/wordprocessingml/2006/main"}).first
wt.content = "New Text"
zip.get_output_stream("word/document.xml") {|f| f << xml.to_s}
zip.close

Answer 1

I ran into the same corruption problem with rubyzip last night. I solved it by copying everything to a new zip file, replacing files as necessary.
Here's my working proof of concept:
#!/usr/bin/env ruby
require 'rubygems'
require 'zip/zip' # rubyzip gem
require 'nokogiri'
class WordXmlFile
def self.open(path, &block)
self.new(path, &block)
end
def initialize(path, &block)
#replace = {}
if block_given?
#zip = Zip::ZipFile.open(path)
yield(self)
#zip.close
else
#zip = Zip::ZipFile.open(path)
end
end
def merge(rec)
xml = #zip.read("word/document.xml")
doc = Nokogiri::XML(xml) {|x| x.noent}
(doc/"//w:fldSimple").each do |field|
if field.attributes['instr'].value =~ /MERGEFIELD (\S+)/
text_node = (field/".//w:t").first
if text_node
text_node.inner_html = rec[$1].to_s
else
puts "No text node for #{$1}"
end
end
end
#replace["word/document.xml"] = doc.serialize :save_with => 0
end
def save(path)
Zip::ZipFile.open(path, Zip::ZipFile::CREATE) do |out|
#zip.each do |entry|
out.get_output_stream(entry.name) do |o|
if #replace[entry.name]
o.write(#replace[entry.name])
else
o.write(#zip.read(entry.name))
end
end
end
end
#zip.close
end
end
if __FILE__ == $0
file = ARGV[0]
out_file = ARGV[1] || file.sub(/\.docx/, ' Merged.docx')
w = WordXmlFile.open(file)
w.force_settings
w.merge('First_Name' => 'Eric', 'Last_Name' => 'Mason')
w.save(out_file)
end

Answer 2

I stumbled accross the post and know nothing about ruby or nokogiri but ...
It looks like you are reziping the new content incorrectly.
I don't know about rubyzip, but you need a way to tell it to update the entry word/document.xml
and then resave/rezip the file.
It looks like you are just overwriting the entry with new data wich of course is going to be a different size and totally screw up the rest of the zip file.
I give an example for excel in this post Parse text file and create an excel report
which may be of use even though i am using a different zip library and VB (Im still doing exactly what you are trying to do, my code is about half way down)
here is the part that applies
Using z As ZipFile = ZipFile.Read(xlStream.BaseStream)
'Grab Sheet 1 out of the file parts and read it into a string.
Dim myEntry As ZipEntry = z("xl/worksheets/sheet1.xml")
Dim msSheet1 As New MemoryStream
myEntry.Extract(msSheet1)
msSheet1.Position = 0
Dim sr As New StreamReader(msSheet1)
Dim strXMLData As String = sr.ReadToEnd
'Grab the data in the empty sheet and swap out the data that I want
Dim str2 As XElement = CreateSheetData(tbl)
Dim strReplace As String = strXMLData.Replace("<sheetData/>", str2.ToString)
z.UpdateEntry("xl/worksheets/sheet1.xml", strReplace)
'This just rezips the file with the new data it doesnt save to disk
z.Save(fiRet.FullName)
End Using

Answer 3

According to the official Github documentation, you should Use write_buffer instead open. There's also a code example at the link.