声明

原文地址http://codingnow.cn/server/409.html

#!/usr/bin/env python
#coding=utf-8

from flask import Flask,url_for,request,render_template,redirect,abort,escape,session
from werkzeug import secure_filename

print __name__
app = Flask(__name__)
app.secret_key = \'hello\'

@app.route(\'/\')
def index():
    return \"hello flask\"

@app.route(\'/user/\')
def show_username(username):
    return username

@app.route(\'/post/\')
def show_post(post_id):
    return \'post_id:%d\' % post_id

#if you visit /projects will redirect /projects/
@app.route(\'/projects/\')
def projects():
    return \'the project page\'

#if you visit /about/ will return 404 error
@app.route(\'/about\')
def about():
    return \'the about page\'

@app.route(\'/upload/\',methods=[\'GET\',\'POST\'])
def upload_file():
    if request.method == \'POST\':
        f = request.files[\'the_file\']
        f.save(\'./\'+secure_filename(f.filename))
        return secure_filename(f.filename)
    else:
        return render_template(\'upload_file.html\')

@app.route(\'/redirect/\')
def test_redirect():
    return redirect(url_for(\'test_error\'))

@app.route(\'/test_error/\')
def test_error():
    #中断请求，并返回错误码
    abort(404)

@app.errorhandler(404)
def page_not_found(error):
    print error
    return render_template(\'page_not_found.html\'),404

@app.route(\'/index/\')
def test_session():
    if \'username\' in session:
        return \'logged in as %s\' % escape(session[\'username\'])
    return redirect(url_for(\'login\'))

@app.route(\'/login/\',methods=[\'GET\',\'POST\'])
def login():
    if request.method == \'POST\':
        session[\'username\'] = request.form[\'username\']
        return redirect(url_for(\'test_session\'))
    else:
        return \'\'\'
        

        
        
        
        \'\'\'
@app.route(\'/logout/\')
def logout():
    session.pop(\'username\',None)
    return redirect(url_for(\'test_session\'))

with app.test_request_context():
    print url_for(\'index\')
    print url_for(\'index\',next=\'/\')
    print url_for(\'show_username\',username=\'alex\')

@app.route(\'/setcookie\')
def set_cookie():
    if \'num\' in request.cookies:
        count = int(request.cookies[\'num\']) + 1
    else:
        count = 0

    #每个view最后返回的都是response对象,render_template内部做了处理
    #也可以这样表示response = make_response(render_template(\'index.html\', count=100))
    #不设置max_age和expires时，默认是会话cookie，浏览器关闭后cookie就失效
    #domain可以设置跨域cookie,如domain=\".example.com\"，这样cookie可以 被\"www.example.com,alex.example.com\"共享
    response = app.make_response(str(count)) 
    response.set_cookie(\'num\',value=count,max_age=None,expires=None,domain=None)
    return response

if __name__ == \'__main__\':
    app.run(host=\"localhost\",port=8888,debug=True)