2011-03-17 74 views
1

我有一个需求,在使用Base64编码对zip文件进行编码后,将zip文件发送到ROR应用程序。我应该解码它,将它保存为一个zip文件并解压缩并执行一些操作。他们通过POST方法发送zip文件编码数据作为参数zip。这里是我在代码中所做的。Base64编码的字符串到文件(Ruby on Rails)

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发生错误。

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' 

当我试图打开的文件的应用还外,该文件没有得到开说

[/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. 

我试着将文件保存与File.open("..", "wb")写在二进制模式的内容,但那么也会发生相同的错误。在解码之前我应该​​对params[:zip]做些什么吗?

回答

3

工程就像一个魅力。 File#open块应正确写入和关闭文件,您可能只是在某处有错误的路径。如果File.exists?和decode64经过,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] 
+0

但我传递文件到一个块并关闭块。我已经读过关闭该块的文件也被关闭。无论如何,我会尝试通过明确关闭文件。谢谢... – rubyprince 2011-03-17 11:25:27

+0

已编辑答案 - 快速早晨回复。是的,该块将关闭该文件。我发布它的例子起作用。 – 2011-03-17 11:26:55

+0

nope.it也没有工作... – rubyprince 2011-03-17 11:35:31