I'm building a web service using Flask and I'm trying to deploy a simple "Hello, World" app using Paster. I'm having trouble get everything configured to work together though. I've seen the Google hit about running Flask with paste using virtualenv and zcbuildout, but that seems like it's overkill for a pretty basic application. Right now, when I try to load a URL with my app, I get this error:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/paste/httpserver.py", line 1068, in process_request_in_thread
self.finish_request(request, client_address)
File "/usr/lib/python2.7/SocketServer.py", line 323, in finish_request
self.RequestHandlerClass(request, client_address, self)
File "/usr/lib/python2.7/SocketServer.py", line 639, in __init__
self.handle()
File "/usr/lib/python2.7/dist-packages/paste/httpserver.py", line 442, in handle
BaseHTTPRequestHandler.handle(self)
File "/usr/lib/python2.7/BaseHTTPServer.py", line 343, in handle
self.handle_one_request()
File "/usr/lib/python2.7/dist-packages/paste/httpserver.py", line 437, in handle_one_request
self.wsgi_execute()
File "/usr/lib/python2.7/dist-packages/paste/httpserver.py", line 287, in wsgi_execute
self.wsgi_start_response)
AttributeError: GraffitiApp instance has no __call__ method
My application configuration looks like:
[DEFAULT]
loglevel = WARN
browser_cache_ttl = 30
[app:main]
use = egg:GraffitiService
[server:main]
use = egg:Paste#http
host = 0.0.0.0
port = %(graffiti_port)s
My application code looks like:
from flask import Flask
app = Flask(__name__)
app.debug = True
class GraffitiApp:
@app.route('/')
def hello_world():
return "Hello World!"
@app.route('/other')
def other_page():
return "Other page!"
def main():
app.run(debug = True)
if __name__ == "__main__":
app.run(debug = True)
Do I need to create a __call__()
method and map whatever URL was passed to the appropriate function, or is there a change I need to make to my configuration?
EDIT
I'm using a factory named main.py as a result of errors I was getting about not finding an entry point named "main":
import logging
from graffiti import GraffitiApp
def make_app(globalArgs, **localArgs):
loglevelname = globalArgs.get("loglevel", "INFO").lower()
if loglevelname == 'critical':
loglevel = logging.CRITICAL
elif loglevelname == 'debug':
loglevel = logging.DEBUG
elif loglevelname == 'error':
loglevel = logging.ERROR
elif loglevelname == 'fatal':
loglevel = logging.FATAL
elif loglevelname == 'info':
loglevel = logging.INFO
elif loglevelname == 'warn' or loglevelname == 'warning':
loglevel = logging.WARN
else:
loglevel = logging.NOTSET
loglevelname = 'notset'
FORMAT = "%(asctime)s %(name)s %(levelname)s %(message)s"
logging.basicConfig(format = FORMAT, level = loglevel)
logging.info("Log level set to %s" % (loglevelname.upper()))
return GraffitiApp()
It looks like the server is trying to run your
GraffitiApp()
class when it should run theFlask()
instanceapp
.