1.11.8 Using the session.start() function

If you are using cookies (which is the recommended way of using the web.session module) you may prefer to use the web.session.start() method to handle the loading or creation of the session automatically and return a store for the application specified. Note: This will print the cookie headers straight away so this method will not work with WSGI applications or other non CGI environments. If you are unsure it is better to use the longer method.

#!/usr/bin/env python

# show python where the modules are
import sys; sys.path.append('../'); sys.path.append('../../../') 
import web.error; web.error.enable()
import os, time
import web.database

# Setup a database connection
connection = web.database.connect(
    adapter="snakesql", 
    database="webserver-session-simple",
    autoCreate = 1,
)
cursor = connection.cursor() 

# Create a session driver and make sure the database tables exist
import web.session

store = web.session.start(
    app='test',
    environmentName='testEnv',
    environmentType='database',
    expire=10, 
    setupSessionEnvironment=1,
    cursor = cursor,
)
manager = store.manager

def printPage(title, url, link, url2, link2, data):
    print """
    <html>
    <h1>%s</h1>
    <p><a href="%s">%s</a></p>
    <p><a href="%s">%s</a></p>
    <p>%s</p>
    </html>"""%(title, url, link, url2, link2, data)
                
# Write a simple application
if not manager.created:
    if web.cgi.has_key('destroy') and web.cgi['destroy'].value == 'True':
        manager.destroy(ignoreWarning=True, sendCookieHeaders=False) 
        manager.sendCookieHeaders()
        print web.header('text/html')
        printPage(
            'Session Destroyed', 
            os.environ['SCRIPT_NAME'], 
            'Start Again', '','',''
        )
    else:
        print web.header('text/html')
        manager.setExpire(manager.expireTime+5)
        data = []
        data.append('SessionID:  ' +manager.sessionID)
        data.append('Store Keys: '+str(store.keys()))
        data.append('Store App:  '+store.app)
        data.append('Variable1:  '+str(store['Variable1']))
        data.append('ExpireTime: '+str(manager.expireTime))
        printPage(
            'Welcome back', 
            os.environ['SCRIPT_NAME'], 
            'Visit Again', 
            os.environ['SCRIPT_NAME']+'?destroy=True', 
            'Destroy Session', 
            '<p>Every time you visit this page the expiry \
            time increases 5 seconds</p>'+'</p><p>'.join(data)
        )
else:
    print web.header('text/html')
    store['Variable1'] = 'Python Rules!'
    printPage(
        'New Session Started',
        os.environ['SCRIPT_NAME'], 
        'Visit Again', '', '',
        "Set variable1 to 'Python Rules!'"
    )

connection.commit() # Save changes
connection.close()  # Close the database connection