Source Code for Module HTTPSpeaker

  1  #!/usr/bin/python 
  2   
  3  """HTTP wrapper around Emacspeak speech server. 
  4   
  5  Speech server is launched on HTTP server startup. 
  6   
  7  Speech commands are invoked via URLs: 
  8   
  9  http://host:port/cmd?arg 
 10   
 11  calls speaker.cmd(arg) 
 12   
 13  """ 
 14   
 15  __id__ = "$Id: HTTPSpeaker.py 7067 2011-06-25 02:49:51Z tv.raman.tv $" 
 16  __author__ = "$Author: tv.raman.tv $" 
 17  __version__ = "$Revision: 7067 $" 
 18  __date__ = "$Date: 2011-06-24 19:49:51 -0700 (Fri, 24 Jun 2011) $" 
 19  __copyright__ = "Copyright (c) 2005 T. V. Raman" 
 20  __license__ = "LGPL" 
 21   
 22   
 23  from speaker import Speaker 
 24  from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler 
 25  import sys 
 26  import os 
 27  import urllib 
 28   
 29 -class HTTPSpeaker (HTTPServer): 
 30   
 31      """Speech server via HTTP.""" 
 32   
 33 -    def __init__(self, address, handler, 
 34                   engine='outloud', 
 35                   rate = 75): 
 36          """Initialize HTTP listener.""" 
 37          HTTPServer.__init__(self, address, handler) 
 38          self.speaker = Speaker(engine, 
 39                                 'localhost', 
 40                                 {'punctuations' : 'some', 
 41                                  'rate' : rate}) 
 42   
 43 -class SpeakHTTPRequestHandler(BaseHTTPRequestHandler): 
 44   
 45      """Handle HTTP Speak requests.""" 
 46      handlers = ['say', 
 47                  'speak', 
 48                  'letter', 
 49                  'addText', 
 50                  'silence', 
 51                  'tone', 
 52                  'stop', 
 53                  'punctuation', 
 54                  'rate', 
 55                  'allcaps', 
 56                  'capitalize', 
 57                  'splitcaps', 
 58                  'reset', 
 59                  'shutdown', 
 60                  'version'             ] 
 61   
 62 -    def do_GET(self): 
 63          """Not Implemented.""" 
 64          #cmd = None 
 65          #arg = None 
 66          if hasattr(self.server.speaker, cmd): 
 67              method = getattr(self.server.speaker, cmd) 
 68              if arg is None: 
 69                  method() 
 70              else: 
 71                  method(urllib.unquote(arg)) 
 72              self.send_response(200, self.path) 
 73          else: self.send_error(501, "Speaker error") 
 74   
 75 -    def do_POST(self): 
 76          """Handle speech request in a POST message. """ 
 77          contentLength = self.headers.getheader('content-length') 
 78          if contentLength: 
 79              contentLength = int(contentLength) 
 80              inputBody = self.rfile.read(contentLength) 
 81              sys.stderr.write(inputBody  + "\n") 
 82              if inputBody.startswith("speak:"): 
 83                  text = inputBody[6:] 
 84                  self.server.speaker.sayUtterances([text] ) 
 85                  self.send_response(200, 'OK') 
 86              elif inputBody == "stop": 
 87                  self.server.speaker.stop() 
 88                  self.send_response(200, 'OK') 
 89              elif inputBody == "isSpeaking": 
 90                  self.send_response(200, 'OK') 
 91                  self.send_header("Content-type", "text/html") 
 92                  self.end_headers() 
 93                  self.wfile.write("0") 
 94              else: 
 95                  self.send_error(501, 'Unknown POST message ' + inputBody) 
 96       
 97 -def start(): 
 98      if sys.argv[1:]: 
 99          engine = sys.argv[1] 
100      else: 
101          engine=os.getenv('DTK_PROGRAM','outloud') 
102      if sys.argv[2:]: 
103          port = int(sys.argv[2]) 
104      else: 
105          port = 8000 
106      if sys.argv[3:]: 
107          rate = int(sys.argv[3]) 
108      else: 
109          rate = 75 
110      server_address = ('', port) 
111      httpd = HTTPSpeaker  (server_address, 
112      SpeakHTTPRequestHandler, engine, rate) 
113      httpd.serve_forever() 
114   
115   
116  if __name__ == '__main__': 
117      start() 
118