Question

我要求在使用Base64编码对zip文件进行编码后将其发送到ROR应用程序。我应解码它，将其保存为zipfile并解压缩并执行一些操作。他们通过POST方法将zip文件编码数据作为名为zip的参数发送。这就是我在代码中所做的。

require 'rubygems'
require 'zip/zip'
require 'base64'

def get_pdf
  encoded_data = Base64.decode64(params[:zip])
  File.open("#{RAILS_ROOT}/zip_archive/zip_file.zip", "w") {|f| f.write encoded_data}
  unzip_file("#{RAILS_ROOT}/zip_archive/zip_file.zip", "#{RAILS_ROOT}/unzipped/")
  ...(using @file_path, do stuff)
end

def unzip_file (file, destination)
  destination = File.join(destination, File.basename(file, ".zip"))
  Zip::ZipFile.open(file) { |zip_file|
    zip_file.each { |f|
      f_path=File.join(destination, f.name)
      FileUtils.mkdir_p(File.dirname(f_path))
      zip_file.extract(f, f_path) unless File.exist?(f_path)
    }
  }
  @file_path = destination
end

但是，我无法正确保存zip文件。保存后的文件在解压缩部分给出错误。

Zip::ZipError (Zip end of central directory signature not found):
  rubyzip (0.9.4) lib/zip/zip.rb:1287:in `get_e_o_c_d'
  rubyzip (0.9.4) lib/zip/zip.rb:1235:in `read_e_o_c_d'
  rubyzip (0.9.4) lib/zip/zip.rb:1260:in `read_from_stream'
  rubyzip (0.9.4) lib/zip/zip.rb:1392:in `initialize'
  rubyzip (0.9.4) lib/zip/zip.rb:1392:in `open'
  rubyzip (0.9.4) lib/zip/zip.rb:1392:in `initialize'
  rubyzip (0.9.4) lib/zip/zip.rb:1410:in `new'
  rubyzip (0.9.4) lib/zip/zip.rb:1410:in `open'
  app/controllers/pdf_controller.rb:37:in `unzip_file'
  app/controllers/pdf_controller.rb:13:in `get_pdf'

当我尝试在应用程序外部打开文件时，文件没有打开说

[/home/prince/Desktop/test_project/zip_archive/zip_file.zip]
  End-of-central-directory signature not found.  Either this file is not
  a zipfile, or it constitutes one disk of a multi-part archive.  In the
  latter case the central directory and zipfile comment will be found on
  the last disk(s) of this archive.
zipinfo:  cannot find zipfile directory in one of /home/prince/Desktop/test_project/zip_archive/zip_file.zip or
          /home/prince/Desktop/test_project/zip_archive/zip_file.zip.zip, and cannot find /home/prince/Desktop/test_project/zip_archive/zip_file.zip.ZIP, period.

我尝试用File.open("..", "wb")保存文件以二进制模式写入内容，但同时也发生了同样的错误。在解码之前我应该对params[:zip]做什么吗？

Answer 1

像魅力一样工作。 File#open块应该正确地写入和关闭文件，你可能只是在某处有错误的路径。如果File.exists?和decode64通过，那么你应该很好。

ruby-1.9.2-p0 > zip = "UEsDBAoAAAAAAKphcT4AAAAAAAAAAAAAAAAFABwAZW1wdHlVVAkAA8/sgU3P\n7IFNdXgLAAEE9QEAAAQUAAAAUEsBAh4DCgAAAAAAqmFxPgAAAAAAAAAAAAAA\nAAUAGAAAAAAAAAAAAKSBAAAAAGVtcHR5VVQFAAPP7IFNdXgLAAEE9QEAAAQU\nAAAAUEsFBgAAAAABAAEASwAAAD8AAAAAAA==\n"
ruby-1.9.2-p0 > File.open('test2.zip', 'wb') {|f| f.write(Base64.decode64(zip))}
 => 160 
ruby-1.9.2-p0 > Zip::ZipFile.open('test2.zip') {|z| z.each {|f| puts f.name}}
empty
 => [empty]

Base64编码的字符串到文件（Ruby on Rails）

1 个答案: