ruby ftp封装实例详解

   # 服务器上移动文件

 def move(origin_file, file_path)

  _file_name = File.basename(origin_file)

  begin

   copy(origin_file, file_path)

   # 删除服务器上源文件

   delete(origin_file)

  rescue => e

   log_info(e)

   # 删除临时文件，如果存在

   delete(file_path + _file_name + ".tmp")

   # 删除服务器上目标文件， 如果存在

   delete(file_path + _file_name)

  end

 end

   # 重命名服务器文件

 def rename(origin_file, file)

  if not @current_ftp.list(origin_file).blank?

   log_info("FTP rename #{origin_file} to #{file}")

   @current_ftp.rename(origin_file, file)

  end

 end

 

  # 删除服务器上的文件

 def delete(origin_file)

  if not @current_ftp.list(origin_file).blank?

   log_info("FTP delete #{origin_file}")

   @current_ftp.delete(origin_file)

  end

 end

 

 # ftp 是否关闭

 def closed?

  @current_ftp.closed?

 end

 

 class << self

    # 文件编码转换

 def convert(src_file, dest_file, from_encode, to_encode )

   log_info("Convert #{src_file} to #{dest_file}")

   cd = Iconv.new(to_encode, from_encode)

   File.open(dest_file, "w") do |out|

    File.open(src_file) do |in_stream|

     in_stream.each_line do |line|

      begin

       new_line = cd.iconv(line)

       out.write(new_line)

      rescue => e

       log_info "convert line error : #{line}"

       next

      end

     end

    end

   end

   cd.close

   dest_file

  end

 end

 

 protected

  #生成ftp

 def create_ftp

  require "net/ftp"

  ftp = Net::FTP.new

  ftp.connect(ftp_host, ftp_port)

  ftp.login(ftp_user, ftp_pwd)

  ftp.passive = ftp_mode

  ftp

 end

 

  #本地路径

def local_file(file)

  local = File.join("tmp/", file)

  FileUtils.makedirs(File.dirname(local))

  local

 end

 

  # 删除本地文件 

 def delete_local_file(file)

  if File.exist?(file)

   log_info("delete local file : " + file)

   File.delete(file)

  end

 end

 

  # 重命名本地文件

 def rename_local_file(origin_file, file)

  if File.exist?(origin_file)

   log_info("rename local file : " + origin_file + " to " + file)

   File.rename(origin_file, file)

  end

 end

 

  #初始化参数

 def ftp_host; "x.x.x.x" end

 def ftp_port; "21" end

 def ftp_user; "x" end

 def ftp_pwd ; "x" end

 def ftp_mode; true end

end