flask文件的上传和下载

from werkzeug.utils import secure_filename
from flask import Flask,render_template,jsonify,request
import time
import os
import base64app = Flask(__name__)
UPLOAD_FOLDER='upload'
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
basedir = os.path.abspath(os.path.dirname(__file__))
ALLOWED_EXTENSIONS = set(['txt','png','jpg','xls','JPG','PNG','xlsx','gif','GIF'])# 用于判断文件后缀
def allowed_file(filename):
return '.' in filename and filename.rsplit('.',1)[1] in ALLOWED_EXTENSIONS# 用于测试上传，稍后用到
@app.route('/test/upload')
def upload_test():
return render_template('upload.html')# 上传文件
@app.route('/api/upload',methods=['POST'],strict_slashes=False)
def api_upload():
file_dir=os.path.join(basedir,app.config['UPLOAD_FOLDER'])
if not os.path.exists(file_dir):
os.makedirs(file_dir)
f=request.files['myfile'] # 从表单的file字段获取文件，myfile为该表单的name值
if f and allowed_file(f.filename): # 判断是否是允许上传的文件类型
fname=secure_filename(f.filename)
print fname
ext = fname.rsplit('.',1)[1] # 获取文件后缀
unix_time = int(time.time())
new_filename=str(unix_time)+'.'+ext # 修改了上传的文件名
f.save(os.path.join(file_dir,new_filename)) #保存文件到upload目录
token = base64.b64encode(new_filename)
print token return jsonify({"errno":0,"errmsg":"上传成功","token":token})
else:
return jsonify({"errno":1001,"errmsg":"上传失败"})if __name__ == '__main__':
app.run(debug=True)

<form id="form1" method="post" action="/api/upload" enctype="multipart/form-data">
<div>
<input id="File1" type="file" name="myfile"/>
<input type="submit">提交</input>
</div>
</form>

{
"errmsg": "\u4e0a\u4f20\u6210\u529f",
"errno": 0,
"token": "MTQ2MzU4MDc5Mi5KUEc="
}

from flask import request,jsonify,send_from_directory,abort
import osdef download(filename):
if request.method=="GET":
if os.path.isfile(os.path.join('upload', filename)):
return send_from_directory('upload',filename,as_attachment=True)
abort(404)