lib/popcorn/popcorn.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2016 Alexandre Terrasa <alexandre@moz-code.org>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Application server abstraction on top of nitcorn.
  18 module popcorn
  19
  20 import nitcorn
  21 import pop_middlewares
  22 intrude import pop_handlers
  23
  24 # App acts like a wrapper around a nitcorn `Action`.
  25 redef class App
  26         super Action
  27
  28         # Do not show anything on console
  29         var quiet = false is writable
  30
  31         # Start listening on `host:port`.
  32         fun listen(host: String, port: Int) do
  33                 var iface = "{host}:{port}"
  34                 var vh = new VirtualHost(iface)
  35
  36                 vh.routes.add new Route("/", self)
  37
  38                 var fac = new HttpFactory.and_libevent
  39                 fac.config.virtual_hosts.add vh
  40
  41                 if not quiet then
  42                         print "Launching server on http://{iface}/"
  43                 end
  44                 fac.run
  45         end
  46
  47         # Handle request from nitcorn
  48         redef fun answer(req, uri) do
  49                 uri = uri.simplify_path
  50                 var res = new HttpResponse(404)
  51                 for route, handler in handlers do
  52                         handler.handle(route, uri, req, res)
  53                 end
  54                 if not res.sent then
  55                         res.send(error_tpl(res.status_code, res.status_message), 404)
  56                 end
  57                 res.session = req.session
  58                 return res
  59         end
  60
  61         #
  62         fun error_tpl(status: Int, message: nullable String): Template do
  63                 return new ErrorTpl(status, message)
  64         end
  65 end
  66
  67 #
  68 class ErrorTpl
  69         super Template
  70
  71         #
  72         var status: Int
  73
  74         #
  75         var message: nullable String
  76
  77         redef fun rendering do add """
  78                 <!DOCTYPE html>
  79                 <html>
  80                 <head>
  81                         <meta charset="utf-8">
  82                         <title>{{{message or else status}}}</title>
  83                 </head>
  84                 <body>
  85                 <h1>{{{status}}} {{{message or else ""}}}</h1>
  86                 </body>
  87                 </html>"""
  88
  89 end