ruby ftp封装实例详解

class FtpTool def initialize()  @current_ftp = create_ftp end 

 def fetch_remote_filenames(source)  return [] if source.blank?  log_info("source is " + source)  filenames = @current_ftp.nlst(source)  filenames end

 def get(origin_file)  local_file = local_file(origin_file)  local_file.gsub("//", "////") #此处注意是window下执行， 在linux下需要注意改成/  log_info("Ftp Get: #{origin_file} -> #{local_file}")  begin   @current_ftp.getbinaryfile(origin_file, local_file+".tmp")  rescue   delete_local_file(local_file+".tmp")  end  rename_local_file(local_file+".tmp", local_file) if File.exist?(local_file+".tmp") end

def put(origin_file, remote_path)  return nil if not File.exist?(origin_file)  _file_name = File.basename(origin_file)  _root = @current_ftp.getdir  @current_ftp.chdir(remote_path)  log_info("Ftp put: #{origin_file} -> #{remote_path}")  begin   @current_ftp.putbinaryfile(origin_file, remote_path + _file_name + ".tmp")  rescue   delete(remote_path + _file_name + ".tmp")  end  @current_ftp.chdir(_root)  rename(remote_path + _file_name + ".tmp", remote_path + _file_name) end 

 def close  @current_ftp.close if @current_ftp end 

 def copy(origin_file, file_path)  local_file = local_file(origin_file)  _file_name = File.basename(origin_file)  begin

 log_info("FTP get file to:" + local_file+".tmp")   @current_ftp.getbinaryfile(origin_file, local_file+".tmp")   return nil if not File.exist?(local_file+".tmp")

  log_info("FTP put file to :" + file_path + _file_name + ".tmp")   @current_ftp.putbinaryfile(local_file+".tmp", file_path + _file_name + ".tmp")   #3. 改名字   rename(file_path + _file_name + ".tmp", file_path + _file_name)   #5. 删除本地   delete_local_file(local_file + ".tmp")  rescue => e   log_info(e)   #4. 删除服务器上临时文件   delete(file_path + origin_file + ".tmp")   #5. 删除本地   delete_local_file(local_file + ".tmp")  end end

 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

 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 

 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 

 def closed?  @current_ftp.closed? end  class << self

 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

 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 

def local_file(file)  local = File.join("tmp/", file)  FileUtils.makedirs(File.dirname(local))  local end 

 def delete_local_file(file)  if File.exist?(file)   log_info("delete local file : " + file)   File.delete(file)  end end 

 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 

 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 endend