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("tmp\\test\\test.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
# 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