python上传下载
import os
from flask import Flask,request
from werkzeug import secure_filename # 获取上传文件的文件名
UPLOAD_FOLDER = '/home/shiyanlou/Code' # 上传路径
ALLOWED_EXTENSIONS = set(['txt','pdf','phg','jpg','jpeg','gif']) # 允许上传的文件类型
app = Flask(__name__)
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
# 验证上传的文件名是否符合要求，文件名必须带点并且符合允许上传的文件类型要求，两者都满足则返回 true
def allowed_file(filename):
return '.' in filename and \
filename.rsplit('.',1)[1] in ALLOWED_EXTENSIONS
@app.route('/',methods=['GET','POST'])
def upload_file():
if request.method == 'POST': # 如果是 POST 请求方式
file = request.files['file'] # 获取上传的文件
if file and allowed_file(file.filename): # 如果文件存在并且符合要求则问 true
filename = secure_filename(file.filename) # 获取上传文件的文件名
file.save(os.path.join(app.config['UPLOAD_FOLDER'],filename)) # 保存文件
return '{} upload successed!'.format(filename) # 返回保存成功的信息
# 使用 GET 方式请求页面或是上传文件失败时返回上传文件的表单页面
return '''
<!doctype html>
<title>Upload new File</title>
<h1>Upload new File</h1>
<form action="" method=post enctype=multipart/form-data>
<p><input type=file name=file>
<input type=submit value=Upload>
</form>
'''
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