bwmon/http.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # Copyright 2010 Thomas Perl and Stefan Kögl. All rights reserved.
   4 #
   5 # Developed for a practical course (Large-scaled distributed computing) at the
   6 # University of Technology Vienna in the 2010 summer term.
   7 #
   8 # Redistribution and use in source and binary forms, with or without
   9 # modification, are permitted provided that the following conditions are met:
  10 #
  11 #    1. Redistributions of source code must retain the above copyright notice,
  12 #       this list of conditions and the following disclaimer.
  13 #
  14 #    2. Redistributions in binary form must reproduce the above copyright notice,
  15 #       this list of conditions and the following disclaimer in the documentation
  16 #       and/or other materials provided with the distribution.
  17 #
  18 # THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR IMPLIED
  19 # WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  20 # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  21 # EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  22 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24 # PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25 # LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  26 # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  27 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 #
  29
  30 from __future__ import absolute_import
  31
  32 import BaseHTTPServer
  33
  34 import os
  35
  36 JS = open(os.path.join(os.path.dirname(__file__) or '.', '..', 'all.js')).read()
  37
  38 HTML = """
  39         <script type="text/javascript">
  40             window.onload = function() {
  41                 var paper = new Raphael(0, 0, 640, 480);
  42                 paper.g.linechart(0, 0, 640, 480, %s, %s);
  43             }
  44         </script>
  45     </head>
  46     <body>
  47     </body>
  48 </html>
  49 """
  50
  51 class RequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
  52     """HTTP Request handler (returns monitoring data)
  53
  54     This is a simple request handler used by the built-in
  55     HTTP server to visualize the monitoring data.
  56     """
  57     monitor = None
  58
  59     def do_GET(self):
  60         """Handler for HTTP GET requests
  61         """
  62         self.send_response(200)
  63         self.send_header('Content-type', 'text/html')
  64         self.send_header('Refresh', '5')
  65         self.end_headers()
  66
  67         x, yy = self.monitor.get_datapoints()
  68
  69         self.wfile.write('<html><head><script type="text/javascript">')
  70         self.wfile.write(JS)
  71         self.wfile.write('</script>')
  72         self.wfile.write(HTML % (repr(x), repr(yy)))
  73
  74 #server = BaseHTTPServer.HTTPServer(('', 8000), RequestHandler)
  75 #while True:
  76 #    server.handle_request()
  77