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Flask -- 请求、上传文件、Cookies

请求对象

from flask import request

request.method    #值为form表单提交的method  'POST'、 'GET'等

#如果值为'POST'或'PUT'，则可以通过reques.form['xxx']来访问表单数据，'xxx'来自<input name='xxx'>

 

 

 

上传文件

impor os

from flask import Flask, render_template, request,  url_for, redirect

from werzegug import sercure_filename


app = Flask(__name__)

UPLOAD_FOLDER = 'C:\User\Zoro\Uploads'     #服务器上的任意目录 '/var/www/uploads'

ALLOWED_EXTENSIONS = set(['txt', 'jpg', 'png', 'jpeg', 'gif', 'pdf'])

app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER



def allowed_file(filename):
    return '.' in filename and filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS

@app.route('/upload', methods=['GET', 'POST'])
def upload_file():
    if request.method == 'POST' :
        file = request.files['file']
        if file and allowed_file(file.filename):
            filename = secure_filename(file)
            file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
            return redirect(url_for('uploaded_file', filename=filename))   #重定向到uploaded_file函数
    return '''
    <!doctype html>
　  <form action="" method=post enctype=multipart/from-data>
　　　　<input type=file name=file>
　　　　<input type=submit value=Upload>
    </form>
    '''

　　@app.route('/upload/<filename>')
　　def uploaded_file(filename):
　　　　return render_template('upload_ok.html', filename=filename)

 

Cookies

你可以通过 cookies 属性来访问 Cookies，用响应对象的 set_cookie 方法来设置 Cookies。请求对象的 cookies 属性是一个内容为客户端提交的所有 Cookies 的字典

#读取 cookies:
from flask import request

@app.route('/')
def index():
    username = request.cookies.get('username')
    # use cookies.get(key) instead of cookies[key] to not get a
    # KeyError if the cookie is missing.


#存储cookies
from flask import make_response

@app.route('/')
def index():
    resp = make_response(render_template(...))
    resp.set_cookie('username', 'the username')
    return resp

可注意到的是，Cookies 是设置在响应对象上的。由于通常视图函数只是返回字符串，之后 Flask 将字符串转换为响应对象。如果你要显式地转换，你可以使用 make_response()函数然后再进行修改。

 

posted @ 2016-04-27 13:43  Roronoa__Zoro  阅读(469)  评论(0)  编辑  收藏  举报