subpath_wsgi.py

# coding: utf-8

from flask import Flask
from werkzeug.wsgi import pop_path_info, peek_path_info
from werkzeug.serving import run_simple

app = Flask(__name__)


class PathDispatcher(object):
    def __init__(self, default_app, prefix):
        self.default_app = default_app
        self.prefix = prefix

    def __call__(self, environ, start_response):
        app = self.default_app
        prefix = peek_path_info(environ)
        if prefix == self.prefix:
            pop_path_info(environ)
            return app(environ, start_response)
        start_response('404 Not Found', [('Content-Type', 'text/plain')])
        return ['Not Found']


@app.route('/')
def hello():
    return 'hello'


wsgi = PathDispatcher(app, 'foo')
run_simple('localhost', 5000, wsgi, use_reloader=True)