def get_contents_to_buf(self): #download file by using file name(string) #flow : download each cloud storage -> combine -> decryption -> save complete file -> flush tmp dir #download each cloud storage #download from s3 combiner = file_mng(self.tmp_dir) tmp_dir = combiner.tmp_dir print "download to s3" self.s3_key.get_contents_to_filename(tmp_dir+"tmp1") print "download to ssg" self.ssg_key.get_contents_to_filename(tmp_dir+"tmp2") #combine files enc_buf = combiner.combine_tmp_files() #decryption(save complete file) dec = Encryption(self.tree.connection._cre.meta_pw) #decrpytion(filename) dec_buf = dec.decrypt(enc_buf) #flush tmp dir combiner.flush_tmp_dir() #error시엔 에러 메시지 출력 후 finally로 무조건 tmp dir 날리기 return dec_buf