cherry 与sqlite

Index.html

<!DOCTYPE html>
<html>
  <head>
    <link href="/static/css/style.css" rel="stylesheet">
    <script src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
    <script type="text/javascript">
      $(document).ready(function() {


        $("#generate-string").click(function(e) {
          $.post("/generator", {"length": $("input[name='length']").val()})
           .done(function(string) {
            $("#the-string").show();
            $("#the-string input").val(string);
          });
          e.preventDefault();
        });


        $("#replace-string").click(function(e) {
          $.ajax({
            type: "PUT",
            url: "/generator",
            data: {"another_string": $("#the-string input").val()}
          })
          .done(function() {
            alert("Replaced!");
          });
          e.preventDefault();
        });


        $("#delete-string").click(function(e) {
          $.ajax({
            type: "DELETE",
            url: "/generator"
          })
          .done(function() {
            $("#the-string").hide();
          });
          e.preventDefault();
        });


      });
    </script>
  </head>
  <body>
    <input type="text" value="8" name="length"/>
    <button id="generate-string">Give it now!</button>
    <div id="the-string">
      <input type="text" />
      <button id="replace-string">Replace</button>
      <button id="delete-string">Delete it</button>
    </div>
  </body>
</html>

Code

import os, os.path
import random
import sqlite3
import string
import time
import cherrypy


DB_STRING = "my.db"

class StringGenerator(object):
    @cherrypy.expose
    def index(self):
        return open('index.html')




@cherrypy.expose
class StringGeneratorWebService(object):


    @cherrypy.tools.accept(media='text/plain')
    def GET(self):
        with sqlite3.connect(DB_STRING) as c:
            cherrypy.session['ts'] = time.time()
            r = c.execute("SELECT value FROM user_string WHERE session_id=?",
                          [cherrypy.session.id])
            return r.fetchone()


    def POST(self, length=8):
        some_string = ''.join(random.sample(string.hexdigits, int(length)))
        with sqlite3.connect(DB_STRING) as c:
            cherrypy.session['ts'] = time.time()
            c.execute("INSERT INTO user_string VALUES (?, ?)",
                      [cherrypy.session.id, some_string])
        return some_string


    def PUT(self, another_string):
        with sqlite3.connect(DB_STRING) as c:
            cherrypy.session['ts'] = time.time()
            c.execute("UPDATE user_string SET value=? WHERE session_id=?",
                      [another_string, cherrypy.session.id])


    def DELETE(self):
        cherrypy.session.pop('ts', None)
        with sqlite3.connect(DB_STRING) as c:
            c.execute("DELETE FROM user_string WHERE session_id=?",
                      [cherrypy.session.id])




def setup_database():
    """
    Create the `user_string` table in the database
    on server startup
    """
    with sqlite3.connect(DB_STRING) as con:
        con.execute("CREATE TABLE user_string (session_id, value)")




def cleanup_database():
    """
    Destroy the `user_string` table from the database
    on server shutdown.
    """
    with sqlite3.connect(DB_STRING) as con:
        con.execute("DROP TABLE user_string")




if __name__ == '__main__':
    conf = {
        '/': {
            'tools.sessions.on': True,
            'tools.staticdir.root': os.path.abspath(os.getcwd())
        },
        '/generator': {
            'request.dispatch': cherrypy.dispatch.MethodDispatcher(),
            'tools.response_headers.on': True,
            'tools.response_headers.headers': [('Content-Type', 'text/plain')],
        },
        '/static': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': './public'
        }
    }


    cherrypy.engine.subscribe('start', setup_database)
    cherrypy.engine.subscribe('stop', cleanup_database)


    webapp = StringGenerator()
    webapp.generator = StringGeneratorWebService()
    cherrypy.quickstart(webapp, '/', conf)

 

 

 

 

 

 

 

 

 

 

 

posted @ 2020-12-23 16:37  anobscureretreat  阅读(112)  评论(0)    收藏  举报