#
# Copyright(C) 2008 Litesim Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#

# A nice simple httpd with REST services
# Should use mulib, but want to integrate easily with ipy for libsl goodness

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

def gen_plain_page(title,content=''):
    return """
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>@TITLE</title>
</head>
<body>
<h1>@TITLE</h1>
<p>
@CONTENT
</p>
</body>
</html>
    """.replace('@TITLE',title).replace('@CONTENT',content)
class litesim_http_resource:
   def __init__(self):
       self.content_type='text/html'
   def handle_get(self,segments=[]):
       return None
   def handle_post(self,segments=[],body=None):
       return None

class html_res(litesim_http_resource):
   content = None
   def handle_get(self,segments=[]):
       return self.content

def gen_htmlres(content):
    newclass = type('html_content',(html_res,),dict(content=content))
    return newclass

def gen_plain_res(title,content):
    return gen_htmlres(gen_plain_page(title,content))

default_res = gen_plain_res('Hello there!','You\'ve reached the default homepage')
404_res     = gen_plain_res('404 - Not found','The resource you were looking for could not be found')

class litesim_http_handler(BaseHTTPRequestHandler):
   def do_GET(self):
       self.url_segments = self.path.split('/')
       self.url_segments.remove('')
       if (self.url_segments.__len__()==1) and self.url_segments[0]=='':
          self.get_resource(default_res,[])
       else:
          self.get_resource(404_res,[])

   def get_resource(self,res,segments,code=200):
       res_obj = res()
       response = res_obj.handle_get(segments)
       if response == None:
          self.get_resource(404_res,[])
       else:
          self.send_response(code)
          self.send_header('Content-type',res_obj.content_type)
          self.send_header('Content-length',str(len(response)))
          self.end_headers()
          self.wfile.write(response)

if __name__ == '__main__':
   server = HTTPServer(('',8000),litesim_http_handler)
   server.serve_forever()