import ftplib
 
ftp = ftplib.FTP()  # 創(chuàng)建FTP對象
ftp.connect('ftp.example.com')  # 連接到FTP服務器

try:
    ftp.connect('ftp.example.com', port=21)
except ftplib.error_perm as e:
    print('連接失敗:', e)

ftp.login('username', 'password')  # 用戶登錄

try:
    ftp.login('username', 'password')
except ftplib.error_perm as e:
    print('登錄失敗:', e)

# 列出當前目錄下的文件列表
try:
    files = ftp.nlst()
    for f in files:
        print(f)
except ftplib.error_perm as e:
    print('列出文件失敗:', e)
 
# 更改工作目錄
try:
    ftp.cwd('target_directory')
except ftplib.error_perm as e:
    print('更改工作目錄失敗:', e)
 
# 獲取文件大小
try:
    file_size = ftp.size('somefile.txt')
    print(f'文件somefile.txt的大小是 {file_size} 字節(jié)')
except ftplib.error_perm as e:
    print('獲取文件大小失敗:', e)
 
# 刪除文件
try:
    ftp.delete('file_to_delete.txt')
except ftplib.error_perm as e:
    print('刪除文件失敗:', e)

from ftplib import FTP
 
def upload_file_binary(ftp, local_path, remote_path):
    with open(local_path, 'rb') as fp:
        ftp.storbinary(f'STOR {remote_path}', fp)

def upload_file_text(ftp, local_path, remote_path):
    with open(local_path, 'r') as fp:
        ftp.storlines(f'STOR {remote_path}', fp)

import os
 
def check_file_exists(file_path):
    if not os.path.exists(file_path):
        raise FileNotFoundError(f"The file {file_path} does not exist.")

def try_upload(max_attempts=3):
    attempts = 0
    while attempts < max_attempts:
        try:
            upload_file_binary(ftp, local_path, remote_path)
            break
        except Exception as e:
            attempts += 1
            print(f"Upload failed: {e}. Retrying ({attempts}/{max_attempts})")
    if attempts == max_attempts:
        print("Max attempts reached. Upload failed.")

class FTPUploader:
    def __init__(self, ftp):
        self.ftp = ftp
 
    def upload(self, local_path, remote_path):
        try:
            self.check_file_exists(local_path)
            with open(local_path, 'rb') as fp:
                self.ftp.storbinary(f'STOR {remote_path}', fp)
        except Exception as e:
            print(f"Error occurred: {e}")
 
    def check_file_exists(self, file_path):
        if not os.path.exists(file_path):
            raise FileNotFoundError(f"The file {file_path} does not exist.")

import logging
 
def setup_logging():
    logging.basicConfig(level=logging.INFO,
                        format='%(asctime)s - %(levelname)s - %(message)s',
                        datefmt='%Y-%m-%d %H:%M:%S')

def upload(self, local_path, remote_path):
    self.check_file_exists(local_path)
    try:
        with open(local_path, 'rb') as fp:
            self.ftp.storbinary(f'STOR {remote_path}', fp)
        logging.info(f"File {local_path} uploaded to {remote_path}")
    except Exception as e:
        logging.error(f"Upload failed: {e}")

def retrbinary(self, cmd, callback, blocksize=8192, rest=None):

def retrlines(self, cmd, callback):

from ftplib import FTP
from io import BytesIO
 
def download_file(ftp, remote_file_path, local_file_path):
    local_file = open(local_file_path, 'wb')
    try:
        ftp.retrbinary('RETR ' + remote_file_path, local_file.write)
    except Exception as e:
        print('下載過程中發(fā)生錯誤:', e)
    finally:
        local_file.close()
 
# 假設已成功連接FTP服務器并登錄
ftp = FTP('ftp.example.com')
ftp.login(user='username', passwd='password')
 
# 下載位于FTP服務器上的名為example.txt的文件
download_file(ftp, 'example.txt', 'example.txt')
 
ftp.quit()

from io import BytesIO
 
def download_file(ftp, remote_file_path, local_file_path):
    local_file = open(local_file_path, 'wb')
    total_size = int(ftp.size(remote_file_path))  # 獲取遠程文件大小
    progress = BytesIO()
    try:
        ftp.retrbinary('RETR ' + remote_file_path, progress.write)
        progress.seek(0)
        downloaded = len(progress.getbuffer())  # 已下載的數(shù)據(jù)量
        print(f"下載進度: {downloaded}/{total_size} ({downloaded / total_size * 100:.2f}%)")
    except Exception as e:
        print('下載過程中發(fā)生錯誤:', e)
    finally:
        local_file.close()

def download_file_resumable(ftp, remote_file_path, local_file_path):
    local_file = open(local_file_path, 'ab')  # 以追加模式打開文件
    progress = BytesIO()
    try:
        # 嘗試獲取本地文件大小，如果不存在則為0
        local_file.seek(0, 2)  # 移動到文件末尾
        local_file_size = local_file.tell()
        # 從服務器獲取文件大小
        remote_file_size = int(ftp.size(remote_file_path))
        # 計算需要下載的文件大小
        size = remote_file_size - local_file_size
        # 如果本地文件大小小于服務器文件大小，則從剩余部分開始下載
        if local_file_size < remote_file_size:
            ftp.retrbinary('RETR ' + remote_file_path, progress.write, rest=local_file_size)
            local_file.write(progress.getvalue())
            downloaded = local_file_size + len(progress.getbuffer())
            print(f"下載進度: {downloaded}/{remote_file_size} ({downloaded / remote_file_size * 100:.2f}%)")
        else:
            print("本地文件已完整下載。")
    except Exception as e:
        print('下載過程中發(fā)生錯誤:', e)
    finally:
        local_file.close()

def download_file_optimized(ftp, remote_file_path, local_file_path):
    local_file = open(local_file_path, 'wb')
    try:
        ftp.retrbinary('RETR ' + remote_file_path, local_file.write, blocksize=16384)  # 設置更大的塊大小
    except Exception as e:
        print('下載過程中發(fā)生錯誤:', e)
    finally:
        local_file.close()

import hashlib
 
def verify_file_integrity(local_file_path, expected_md5):
    hash_md5 = hashlib.md5()
    with open(local_file_path, 'rb') as file:
        for chunk in iter(lambda: file.read(4096), b""):
            hash_md5.update(chunk)
    return hash_md5.hexdigest() == expected_md5
 
# 使用示例
expected_md5 = 'your_expected_md5_value'  # 需要提前獲取
if verify_file_integrity('example.txt', expected_md5):
    print("文件完整性驗證成功。")
else:
    print("文件完整性驗證失敗。")

import ftplib
 
def connect_ftp(server, username, password):
    ftp = ftplib.FTP(server)
    try:
        ftp.login(username, password)
        print("成功連接并登錄到FTP服務器。")
    except Exception as e:
        print(f"連接或登錄失?。簕e}")
    return ftp

def upload_file(ftp, local_file_path, remote_file_path):
    with open(local_file_path, 'rb') as file:
        ftp.storbinary(f'STOR {remote_file_path}', file)
    print(f"文件 {local_file_path} 已上傳至 {remote_file_path}")
 
def download_file(ftp, remote_file_path, local_file_path):
    with open(local_file_path, 'wb') as file:
        ftp.retrbinary(f'RETR {remote_file_path}', file.write)
    print(f"文件 {remote_file_path} 已下載至 {local_file_path}")

import threading
import schedule
 
def schedule_file_transfer():
    # 這里可以定義定時任務的規(guī)則和時間
    schedule.every().day.at("10:00").do(upload_and_download_files)
 
def upload_and_download_files():
    ftp = connect_ftp('ftp.example.com', 'username', 'password')
    if ftp:
        upload_file(ftp, 'path/to/local/file', 'path/to/remote/file')
        download_file(ftp, 'path/to/remote/file', 'path/to/local/file')
        ftp.quit()  # 關閉連接

import logging
 
def setup_logging():
    logging.basicConfig(level=logging.INFO,
                        format='%(asctime)s - %(levelname)s - %(message)s')
    return logging.getLogger()
 
def log_transfer_info(logger, message):
    logger.info(f"文件傳輸信息: {message}")
 
# 在文件上傳和下載函數(shù)中調用 log_transfer_info 來記錄日志

if __name__ == '__main__':
    logger = setup_logging()
    schedule_file_transfer()
    while True:
        schedule.run_pending()
        # 這里可以添加其他任務或讓程序休眠一段時間