CODEWITHSUNDEEP
pythonurlroutescherrypydispatcher
Eric
Eric

Reputation: 2705

Routing Cherrypy web apps(fail to road resource)

I have spent more than 4 days trying to figure out this, but my every attempt failed, so I thought I could really use some of your helps.

In the code below, Storm is an app with function submit_data() which fetches data from databases according to pagename parameter passed at instantiation and idx parameter passed from xmlhttp GET request in Javascript.

Basically I want to have an index page with Root class, and a bunch of similar Storm pages with different pagename parameters read from an XML file.

I am using RoutesDispatcher because I am parametrizing page name(address) using the XML file too.

When I used /storm as the address it didn't even work probably because the name clashes, so I set the address as /st/.

Now it displays the header, but it does not find submit_data function at all. The Chrome console throws the following error.

Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:8080/st/submit_data?idx=0
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:8080/st/submit_data?idx=2
Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:8080/st/submit_data?idx=1

How can I structure this so that when I type localhost:8080/st on my browser, the html/javascript template storm.html looks up submit_data function and call it and display it on the webpage? Before I started routing, it worked totally fine.

class Storm(object):
    pagename = ""
    def __init__(self, pagename):
        self.pagename = pagename

    @cherrypy.expose
    @cherrypy.tools.mako(filename="storm.html", directories=MEDIA_DIR)
    def index(self, name=None):
        return {'size': len(params["dashboards"][self.pagename])}

    @cherrypy.expose 
    def submit_data(self, idx):
        idx = int(idx)
        chart = params["dashboards"][self.pagename][idx]
        # Sample page that displays the number of records in "table" 
        # Open a cursor, using the DB connection for the current thread 
        c = cherrypy.thread_data.dbdict[chart["dbname"]].cursor() 
        print 'query being executed......'
        c.execute(chart["command"])
        print 'query being fetched......'
        res = c.fetchall()
        c.close()

        # construct a JSON object from query result
        jsres = []
        jsres.append(chart["selected"])
                       .
                       .
                       .

        return json.dumps(jsres)

class Root(object):
    #storm = Storm("first")
    @cherrypy.expose
    @cherrypy.tools.mako(filename="index.html", directories=MEDIA_DIR)
    def index(self, name=None):
        return {}

config = {'/media':
                {'tools.staticdir.on': True,
                 'tools.staticdir.dir': MEDIA_DIR,
                }
        }

root = Root()
storm = Storm("first") 
mapper = cherrypy.dispatch.RoutesDispatcher()
mapper.connect('home','/',controller=root, action='index')
mapper.connect('st','/st/',controller=storm, action='index')
conf = {'/': {'request.dispatch': mapper}}
app=cherrypy.tree.mount(root=None,config=conf)
cherrypy.quickstart(app)

Upvotes: 0

Views: 221

Answers (1)

A. Coady
A. Coady

Reputation: 57338

mapper.connect('st','/st/submit_data',controller=storm, action='submit_data')

Routes explicitly list all their handlers, and because of that also don't need to be exposed. Based on this example, you might not want the routes dispatcher. The default dispatcher with multiple roots mounted would work fine.

Upvotes: 1

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