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1#!/usr/bin/env python
2# Copyright (c) 2013 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6"""Creates simple HTML for running a NaCl module.
7
8This script is designed to make the process of creating running
9Native Client executables in the browers simple by creating
10boilderplate a .html (and optionally a .nmf) file for a given
11Native Client executable (.nexe).
12
13If the script if given a .nexe file it will produce both html
14the nmf files.  If it is given an nmf it will only create
15the html file.
16"""
17
18import optparse
19import os
20import sys
21import subprocess
22
23SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
24HTML_TEMPLATE = '''\
25<!DOCTYPE html>
26<!--
27Sample html container for embedded NaCl module.  This file was auto-generated
28by the create_html tool which is part of the NaCl SDK.
29
30The embed tag is setup with PS_STDOUT, PS_STDERR and PS_TTY_PREFIX attributes
31which, for applications linked with ppapi_simple, will cause stdout and stderr
32to be sent to javascript via postMessage.  Also, the postMessage listener
33assumes that all messages sent via postMessage are strings to be displayed in
34the output textarea.
35-->
36<html>
37<head>
38  <meta http-equiv="Pragma" content="no-cache">
39  <meta http-equiv="Expires" content="-1">
40  <title>%(title)s</title>
41
42</head>
43<body>
44  <h2>Native Client Module: %(module_name)s</h2>
45  <p>Status: <code id="status">Loading</code></p>
46
47  <div id="listener">
48    <embed id="nacl_module" name="%(module_name)s" src="%(nmf)s"
49           type="application/x-nacl" width=640 height=480
50           PS_TTY_PREFIX="tty:"
51           PS_STDOUT="/dev/tty"
52           PS_STDERR="/dev/tty" >/
53  </div>
54
55  <p>Standard output/error:</p>
56  <textarea id="stdout" rows="25" cols="80">
57</textarea>
58
59  <script>
60listenerDiv = document.getElementById("listener")
61stdout = document.getElementById("stdout")
62nacl_module = document.getElementById("nacl_module")
63
64function updateStatus(message) {
65  document.getElementById("status").innerHTML = message
66}
67
68function addToStdout(message) {
69  stdout.value += message;
70  stdout.scrollTop = stdout.scrollHeight;
71}
72
73function handleMessage(message) {
74  var payload = message.data;
75  var prefix = "tty:";
76  if (typeof(payload) == 'string' && payload.indexOf(prefix) == 0) {
77    addToStdout(payload.slice(prefix.length));
78  }
79}
80
81function handleCrash(event) {
82  updateStatus("Crashed/exited with status: " + nacl_module.exitStatus)
83}
84
85function handleLoad(event) {
86  updateStatus("Loaded")
87}
88
89listenerDiv.addEventListener("load", handleLoad, true);
90listenerDiv.addEventListener("message", handleMessage, true);
91listenerDiv.addEventListener("crash", handleCrash, true);
92  </script>
93</body>
94</html>
95'''
96
97
98class Error(Exception):
99  pass
100
101
102def Log(msg):
103  if Log.enabled:
104    sys.stderr.write(str(msg) + '\n')
105Log.enabled = False
106
107
108def CreateHTML(filenames, options):
109  nmf = None
110
111  for filename in filenames:
112    if not os.path.exists(filename):
113      raise Error('file not found: %s' % filename)
114
115    if not os.path.isfile(filename):
116      raise Error('specified input is not a file: %s' % filename)
117
118    basename, ext = os.path.splitext(filename)
119    if ext not in ('.nexe', '.pexe', '.nmf'):
120      raise Error('input file must be .nexe, .pexe or .nmf: %s' % filename)
121
122    if ext == '.nmf':
123      if len(filenames) > 1:
124        raise Error('Only one .nmf argument can be specified')
125      nmf = filename
126    elif len(filenames) > 1 and not options.output:
127      raise Error('When specifying muliple input files -o must'
128                  ' also be specified.')
129
130  htmlfile = options.output
131  if not htmlfile:
132    htmlfile = basename + '.html'
133  basename = os.path.splitext(os.path.basename(htmlfile))[0]
134
135  if not nmf:
136    nmf = os.path.splitext(htmlfile)[0] + '.nmf'
137    Log('creating nmf: %s' % nmf)
138    create_nmf = os.path.join(SCRIPT_DIR, 'create_nmf.py')
139    staging = os.path.dirname(nmf)
140    if not staging:
141      staging = '.'
142    cmd = [create_nmf, '-s', staging, '-o', nmf] + filenames
143    if options.verbose:
144      cmd.append('-v')
145    if options.debug_libs:
146      cmd.append('--debug-libs')
147    Log(cmd)
148    try:
149      subprocess.check_call(cmd)
150    except subprocess.CalledProcessError:
151      raise Error('create_nmf failed')
152
153  Log('creating html: %s' % htmlfile)
154  with open(htmlfile, 'w') as outfile:
155    args = {}
156    args['title'] = basename
157    args['module_name'] = basename
158    args['nmf'] = os.path.basename(nmf)
159    outfile.write(HTML_TEMPLATE % args)
160
161
162def main(argv):
163  usage = 'Usage: %prog [options] <.nexe/.pexe or .nmf>'
164  epilog = 'Example: create_html.py -o index.html my_nexe.nexe'
165  parser = optparse.OptionParser(usage, description=__doc__, epilog=epilog)
166  parser.add_option('-v', '--verbose', action='store_true',
167                    help='Verbose output')
168  parser.add_option('-d', '--debug-libs', action='store_true',
169                    help='When calling create_nmf request debug libaries')
170  parser.add_option('-o', '--output', dest='output',
171                    help='Name of html file to write (default is '
172                         'input name with .html extension)',
173                    metavar='FILE')
174
175  # To enable bash completion for this command first install optcomplete
176  # and then add this line to your .bashrc:
177  #  complete -F _optcomplete create_html.py
178  try:
179    import optcomplete
180    optcomplete.autocomplete(parser)
181  except ImportError:
182    pass
183
184  options, args = parser.parse_args(argv)
185
186  if not args:
187    parser.error('no input file specified')
188
189  if options.verbose:
190    Log.enabled = True
191
192  CreateHTML(args, options)
193  return 0
194
195
196if __name__ == '__main__':
197  try:
198    rtn = main(sys.argv[1:])
199  except Error, e:
200    sys.stderr.write('%s: %s\n' % (os.path.basename(__file__), e))
201    rtn = 1
202  except KeyboardInterrupt:
203    sys.stderr.write('%s: interrupted\n' % os.path.basename(__file__))
204    rtn = 1
205  sys.exit(rtn)
206