ruby ftp封装实例详解

2019-09-25 09:35:37王冬梅

 ruby ftp封装实例详解

最近自己用ruby 封装了一个Net::FTP的工具类.

class FtpTool

 def initialize()

  @current_ftp = create_ftp

 end

 

  # 获取指定格式的文件名称列表

  # 例如: source = "test/*.txt"

  # 返回: [source/file_name.txt]

 def fetch_remote_filenames(source)

  return [] if source.blank?

  log_info("source is " + source)

  filenames = @current_ftp.nlst(source)

  filenames

 end

   # 获取服务器上确切名称的文件

  # 例如: get("test/test.txt")

  # 文件将被保存到本地 tmp/test/test.txt

 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

   # 上传文件到指定的路径

  # 例如: put("tmptesttest.txt", "/test/")

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

 

  # 关闭ftp

 def close

  @current_ftp.close if @current_ftp

 end

 

  # 服务器copy文件 

 def copy(origin_file, file_path)

  local_file = local_file(origin_file)

  _file_name = File.basename(origin_file)

  begin

      #1. 到本地    

 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")

      #2. 到服务器   

  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