Python下载文件的10种方法介绍

import urllib.request

url = 'https://example.com/file.zip'
filename = 'file.zip'

urllib.request.urlretrieve(url, filename)
print(f"文件已下载到: {filename}")

import requests

url = 'https://example.com/file.zip'
filename = 'file.zip'

response = requests.get(url)
with open(filename, 'wb') as f:
    f.write(response.content)
print("下载完成!")

import requests
from tqdm import tqdm

url = 'https://example.com/largefile.zip'
filename = 'largefile.zip'

response = requests.get(url, stream=True)
total_size = int(response.headers.get('content-length', 0))
block_size = 1024  # 1KB

progress_bar = tqdm(total=total_size, unit='iB', unit_scale=True)
with open(filename, 'wb') as f:
    for data in response.iter_content(block_size):
        progress_bar.update(len(data))
        f.write(data)
progress_bar.close()
print("\n下载完成!")

import wget

url = 'https://example.com/file.zip'
filename = wget.download(url)
print(f"\n文件已下载到: {filename}")

import http.client
import urllib.parse

url = 'https://example.com/file.zip'
parsed_url = urllib.parse.urlparse(url)
filename = 'file.zip'

conn = http.client.HTTPSConnection(parsed_url.netloc)
conn.request("GET", parsed_url.path)
response = conn.getresponse()

with open(filename, 'wb') as f:
    f.write(response.read())
conn.close()
print("下载完成!")

import aiohttp
import asyncio

async def download_file(url, filename):
    async with aiohttp.ClientSession() as session:
        async with session.get(url) as response:
            with open(filename, 'wb') as f:
                while True:
                    chunk = await response.content.read(1024)
                    if not chunk:
                        break
                    f.write(chunk)
    print(f"文件已下载到: {filename}")

url = 'https://example.com/file.zip'
filename = 'file.zip'

​​​​​​​asyncio.run(download_file(url, filename))

import pycurl
from io import BytesIO

url = 'https://example.com/file.zip'
filename = 'file.zip'

buffer = BytesIO()
c = pycurl.Curl()
c.setopt(c.URL, url)
c.setopt(c.WRITEDATA, buffer)
c.perform()
c.close()

with open(filename, 'wb') as f:
    f.write(buffer.getvalue())
print("下载完成!")

import urllib3

url = 'https://example.com/file.zip'
filename = 'file.zip'

http = urllib3.PoolManager()
response = http.request('GET', url)

with open(filename, 'wb') as f:
    f.write(response.data)
print("下载完成!")

from ftplib import FTP

ftp = FTP('ftp.example.com')
ftp.login(user='username', passwd='password')
filename = 'remote_file.zip'
local_filename = 'local_file.zip'

with open(local_filename, 'wb') as f:
    ftp.retrbinary(f'RETR {filename}', f.write)
ftp.quit()
print("FTP文件下载完成!")

import paramiko

host = 'example.com'
port = 22
username = 'user'
password = 'password'
remote_path = '/path/to/remote/file.zip'
local_path = 'file.zip'

ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(host, port, username, password)

sftp = ssh.open_sftp()
sftp.get(remote_path, local_path)
sftp.close()
ssh.close()
print("SCP文件下载完成!")