tornadoの2

tornado之日记本——

 

1、diary.py：

 

import time

from model.database import DataBase

from tornado import web, httpserver, ioloop

 

def getDiaryInfo(self):

    t = self.get_argument('time',time.strftime('%Y-%m-%d %X', time.localtime()))

    weather = self.get_argument('weather')

    mood = self.get_argument('mood')

    content = self.get_argument('content')

    return dict(time=t, weather=weather, mood=mood, content=content)

 

class IndexHandler(web.RequestHandler):

    def get(self, *args, **kwargs):

        search=self.get_argument('search','')   #初始搜索词为空，列出所有日记

        diaries=DataBase().getDiaries(search)

        self.render('index之日记本.html',diaries=diaries)

 

class CreateDiaryHandler(web.RequestHandler):

    def get(self, *args, **kwargs):

        self.render('createDiary.html')

    def post(self, *args, **kwargs):

        item=getDiaryInfo(self)

        DataBase().createDiary(item)

        self.redirect('/')

 

class UpdateDiaryHandler(web.RequestHandler):

    def get(self, *args, **kwargs):

        diary=DataBase().getDiaryByID(self.get_argument('id'))

        self.render('updateDiary.html',diary=diary)

    def post(self, *args, **kwargs):

        item=getDiaryInfo(self) #id是get的参数，其他来自post请求

        item.update({'id':self.get_argument('id')})

        DataBase().updateDiary(item)

        self.redirect('/')

 

class DeleteDiaryHandler(web.RequestHandler):

    def get(self, *args, **kwargs):

        id=self.get_argument('id')

        self.write(f'''＜form method="post">

        ＜input type="submit" value="确认删除日记{id}" name="deleteDiary">

        ＜input type="submit" value="取消删除{id}" name="deleteDiary">＜/form>''')

    def post(self, *args, **kwargs):

        if '确认' in self.get_argument('deleteDiary'):

            DataBase().deleteDiary(self.get_argument('id'))

        self.redirect('/')

 

class InfoDiaryHandler(web.RequestHandler):

    def get(self, *args, **kwargs):

        diary=DataBase().getDiaryByID(self.get_argument('id'))

        self.render('infoDiary.html',diary=diary)

 

app = web.Application([

    (r'/', IndexHandler),

    (r'/createDiary', CreateDiaryHandler),

    (r'/updateDiary', UpdateDiaryHandler),

    (r'/deleteDiary', DeleteDiaryHandler),

    (r'/infoDiary', InfoDiaryHandler),

],**{'template_path':'templates','static_path':'static'})

 

if __name__ == '__main__':

    httpServer = httpserver.HTTPServer(app)

    httpServer.listen(8080)

    print('http://127.0.0.1:8080')

    ioloop.IOLoop.current().start()

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2、model文件夹中的database.py：

 

import pymysql

 

class DataBase:

    def __init__(self):

        self.conn=pymysql.connect(host='localhost',port=3306,user='chengy',password='',

            db='tornado之日记本',charset='utf8mb4')

        self.cur=self.conn.cursor(pymysql.cursors.DictCursor)

 

    def operateDatabase(self,sql,insertValues=None):

        self.cur.execute(sql,insertValues)

        self.conn.commit()

        self.cur.close()

        self.conn.close()

 

    def createDiary(self,item):

        sql='insert into diaries(time,weather,mood,content) values(%s,%s,%s,%s)'

        insertValues=(item['time'],item['weather'],item['mood'],item['content'])

        self.operateDatabase(sql,insertValues)

 

    def updateDiary(self,item):

        sql=f'''update diaries set time="{item['time']}",weather="{item['weather']}",

          mood="{item['mood']}",content="{item['content']}" where id={item['id']}'''

        self.operateDatabase(sql)

 

    def deleteDiary(self,id=''):

        sql=f'delete from diaries where id={id}'

        self.operateDatabase(sql)

 

    def getDiaries(self,search=''):

        sql=f'select * from diaries where content like "%{search}%" \

        or weather like "%{search}%" or mood like "%{search}%" limit 25'

        self.operateDatabase(sql)

        return self.cur.fetchall()

 

    def getDiaryByID(self,id=''):

        sql=f'select * from diaries where id={id}'

        self.operateDatabase(sql)

        return self.cur.fetchone()

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3、templates文件夹

 

index之日记本.html：

 

＜h2>日行一事＜/h2>

＜div>＜a href="/createDiary">新建日记＜/a>＜br>＜/div>

＜form action="" method="get">

    搜索日记：＜input type="text" name="search">

    ＜input type="submit" value="搜索">

＜/form>

＜br>＜br>

{% if diaries %}

    ＜table cellspacing="0" cellpadding="0" border="9">

        ＜tr>＜th>修改＜/th>＜th>删除＜/th>＜th>id＜/th>＜th>时间＜/th>

            ＜th>天气＜/th>＜th>心情＜/th>＜th>内容＜/th>＜/tr>

        {% for diary in diaries %}

            ＜tr>＜td>＜a href="/updateDiary?id={{diary['id']}}">修改＜/a>＜/td>

            ＜td>＜a href="/deleteDiary?id={{diary['id']}}">删除＜/a>＜/td>

            ＜td>{{diary['id']}}＜/td>＜td>{{diary['time']}}＜/td>＜td>{{diary['weather']}}＜/td>

            ＜td>{{diary['mood']}}＜/td>

            ＜td>＜a href="/infoDiary?id={{diary['id']}}">{{diary['content'][:20]}}＜/a>＜/td>

            ＜/tr>   ＜!--显示前9个字符，tornado用[:9]，django用|truncatechars:'9'-->

        {% end %}

    ＜/table>

{% end %}

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createDiary.html：

 

＜h2>新建日记＜/h2>

＜form action="" method="post">

    天气：＜input type="text" name="weather">＜br>

    心情：＜input type="text" name="mood">＜br>

    内容：＜textarea rows="10" cols="30" name="content">＜/textarea>＜br>

    ＜input type="submit" value="保存">

＜/form>

*****分割线*****

updateDiary.html：

 

＜h2>更新日记＜/h2>

{% if diary %}

＜form action="" method="post">

    时间：＜input type="text" name="time" value="{{diary['time']}}">＜br>

    天气：＜input type="text" name="weather" value="{{diary['weather']}}">＜br>

    心情：＜input type="text" name="mood" value="{{diary['mood']}}">＜br>

    内容：＜textarea rows="10" cols="30" name="content">{{diary['content']}}＜/textarea>＜br>

    ＜input type="submit" value="更新">    ＜!--textarea无value属性，直接写在标签之间-->

＜/form>

{% end %}

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infoDiary.html：

 

＜h2 style="color: red;">日记详情＜/h2>

＜h3>＜a href="/">返回首页＜/a>＜br>＜br>＜/h3>

{% if diary %}

    标识：{{diary['id']}}＜br>

    时间：{{diary['time']}}＜br>

    天气：{{diary['weather']}}＜br>

    心情：{{diary['mood']}}＜br>＜br>

    ＜!--把字符当html解析：对它用raw语法，或在head中加句{% autoescape None %}-->

    {%raw diary['content'].replace('\r\n','＜br>').replace(' ','＆nbsp;')%}

{% end %}   ＜!--使用时，各篇html代码替换回半角的&及左尖角符-->