/usr/share/pyshared/paste/debug/watchthreads.py is in python-paste 1.7.5.1-4.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 | """
Watches the key ``paste.httpserver.thread_pool`` to see how many
threads there are and report on any wedged threads.
"""
import sys
import cgi
import time
import traceback
from cStringIO import StringIO
from thread import get_ident
from paste import httpexceptions
from paste.request import construct_url, parse_formvars
from paste.util.template import HTMLTemplate, bunch
page_template = HTMLTemplate('''
<html>
<head>
<style type="text/css">
body {
font-family: sans-serif;
}
table.environ tr td {
border-bottom: #bbb 1px solid;
}
table.environ tr td.bottom {
border-bottom: none;
}
table.thread {
border: 1px solid #000;
margin-bottom: 1em;
}
table.thread tr td {
border-bottom: #999 1px solid;
padding-right: 1em;
}
table.thread tr td.bottom {
border-bottom: none;
}
table.thread tr.this_thread td {
background-color: #006;
color: #fff;
}
a.button {
background-color: #ddd;
border: #aaa outset 2px;
text-decoration: none;
margin-top: 10px;
font-size: 80%;
color: #000;
}
a.button:hover {
background-color: #eee;
border: #bbb outset 2px;
}
a.button:active {
border: #bbb inset 2px;
}
</style>
<title>{{title}}</title>
</head>
<body>
<h1>{{title}}</h1>
{{if kill_thread_id}}
<div style="background-color: #060; color: #fff;
border: 2px solid #000;">
Thread {{kill_thread_id}} killed
</div>
{{endif}}
<div>Pool size: {{nworkers}}
{{if actual_workers > nworkers}}
+ {{actual_workers-nworkers}} extra
{{endif}}
({{nworkers_used}} used including current request)<br>
idle: {{len(track_threads["idle"])}},
busy: {{len(track_threads["busy"])}},
hung: {{len(track_threads["hung"])}},
dying: {{len(track_threads["dying"])}},
zombie: {{len(track_threads["zombie"])}}</div>
{{for thread in threads}}
<table class="thread">
<tr {{if thread.thread_id == this_thread_id}}class="this_thread"{{endif}}>
<td>
<b>Thread</b>
{{if thread.thread_id == this_thread_id}}
(<i>this</i> request)
{{endif}}</td>
<td>
<b>{{thread.thread_id}}
{{if allow_kill}}
<form action="{{script_name}}/kill" method="POST"
style="display: inline">
<input type="hidden" name="thread_id" value="{{thread.thread_id}}">
<input type="submit" value="kill">
</form>
{{endif}}
</b>
</td>
</tr>
<tr>
<td>Time processing request</td>
<td>{{thread.time_html|html}}</td>
</tr>
<tr>
<td>URI</td>
<td>{{if thread.uri == 'unknown'}}
unknown
{{else}}<a href="{{thread.uri}}">{{thread.uri_short}}</a>
{{endif}}
</td>
<tr>
<td colspan="2" class="bottom">
<a href="#" class="button" style="width: 9em; display: block"
onclick="
var el = document.getElementById('environ-{{thread.thread_id}}');
if (el.style.display) {
el.style.display = '';
this.innerHTML = \'▾ Hide environ\';
} else {
el.style.display = 'none';
this.innerHTML = \'▸ Show environ\';
}
return false
">▸ Show environ</a>
<div id="environ-{{thread.thread_id}}" style="display: none">
{{if thread.environ:}}
<table class="environ">
{{for loop, item in looper(sorted(thread.environ.items()))}}
{{py:key, value=item}}
<tr>
<td {{if loop.last}}class="bottom"{{endif}}>{{key}}</td>
<td {{if loop.last}}class="bottom"{{endif}}>{{value}}</td>
</tr>
{{endfor}}
</table>
{{else}}
Thread is in process of starting
{{endif}}
</div>
{{if thread.traceback}}
<a href="#" class="button" style="width: 9em; display: block"
onclick="
var el = document.getElementById('traceback-{{thread.thread_id}}');
if (el.style.display) {
el.style.display = '';
this.innerHTML = \'▾ Hide traceback\';
} else {
el.style.display = 'none';
this.innerHTML = \'▸ Show traceback\';
}
return false
">▸ Show traceback</a>
<div id="traceback-{{thread.thread_id}}" style="display: none">
<pre class="traceback">{{thread.traceback}}</pre>
</div>
{{endif}}
</td>
</tr>
</table>
{{endfor}}
</body>
</html>
''', name='watchthreads.page_template')
class WatchThreads(object):
"""
Application that watches the threads in ``paste.httpserver``,
showing the length each thread has been working on a request.
If allow_kill is true, then you can kill errant threads through
this application.
This application can expose private information (specifically in
the environment, like cookies), so it should be protected.
"""
def __init__(self, allow_kill=False):
self.allow_kill = allow_kill
def __call__(self, environ, start_response):
if 'paste.httpserver.thread_pool' not in environ:
start_response('403 Forbidden', [('Content-type', 'text/plain')])
return ['You must use the threaded Paste HTTP server to use this application']
if environ.get('PATH_INFO') == '/kill':
return self.kill(environ, start_response)
else:
return self.show(environ, start_response)
def show(self, environ, start_response):
start_response('200 OK', [('Content-type', 'text/html')])
form = parse_formvars(environ)
if form.get('kill'):
kill_thread_id = form['kill']
else:
kill_thread_id = None
thread_pool = environ['paste.httpserver.thread_pool']
nworkers = thread_pool.nworkers
now = time.time()
workers = thread_pool.worker_tracker.items()
workers.sort(key=lambda v: v[1][0])
threads = []
for thread_id, (time_started, worker_environ) in workers:
thread = bunch()
threads.append(thread)
if worker_environ:
thread.uri = construct_url(worker_environ)
else:
thread.uri = 'unknown'
thread.thread_id = thread_id
thread.time_html = format_time(now-time_started)
thread.uri_short = shorten(thread.uri)
thread.environ = worker_environ
thread.traceback = traceback_thread(thread_id)
page = page_template.substitute(
title="Thread Pool Worker Tracker",
nworkers=nworkers,
actual_workers=len(thread_pool.workers),
nworkers_used=len(workers),
script_name=environ['SCRIPT_NAME'],
kill_thread_id=kill_thread_id,
allow_kill=self.allow_kill,
threads=threads,
this_thread_id=get_ident(),
track_threads=thread_pool.track_threads())
return [page]
def kill(self, environ, start_response):
if not self.allow_kill:
exc = httpexceptions.HTTPForbidden(
'Killing threads has not been enabled. Shame on you '
'for trying!')
return exc(environ, start_response)
vars = parse_formvars(environ)
thread_id = int(vars['thread_id'])
thread_pool = environ['paste.httpserver.thread_pool']
if thread_id not in thread_pool.worker_tracker:
exc = httpexceptions.PreconditionFailed(
'You tried to kill thread %s, but it is not working on '
'any requests' % thread_id)
return exc(environ, start_response)
thread_pool.kill_worker(thread_id)
script_name = environ['SCRIPT_NAME'] or '/'
exc = httpexceptions.HTTPFound(
headers=[('Location', script_name+'?kill=%s' % thread_id)])
return exc(environ, start_response)
def traceback_thread(thread_id):
"""
Returns a plain-text traceback of the given thread, or None if it
can't get a traceback.
"""
if not hasattr(sys, '_current_frames'):
# Only 2.5 has support for this, with this special function
return None
frames = sys._current_frames()
if not thread_id in frames:
return None
frame = frames[thread_id]
out = StringIO()
traceback.print_stack(frame, file=out)
return out.getvalue()
hide_keys = ['paste.httpserver.thread_pool']
def format_environ(environ):
if environ is None:
return environ_template.substitute(
key='---',
value='No environment registered for this thread yet')
environ_rows = []
for key, value in sorted(environ.items()):
if key in hide_keys:
continue
try:
if key.upper() != key:
value = repr(value)
environ_rows.append(
environ_template.substitute(
key=cgi.escape(str(key)),
value=cgi.escape(str(value))))
except Exception, e:
environ_rows.append(
environ_template.substitute(
key=cgi.escape(str(key)),
value='Error in <code>repr()</code>: %s' % e))
return ''.join(environ_rows)
def format_time(time_length):
if time_length >= 60*60:
# More than an hour
time_string = '%i:%02i:%02i' % (int(time_length/60/60),
int(time_length/60) % 60,
time_length % 60)
elif time_length >= 120:
time_string = '%i:%02i' % (int(time_length/60),
time_length % 60)
elif time_length > 60:
time_string = '%i sec' % time_length
elif time_length > 1:
time_string = '%0.1f sec' % time_length
else:
time_string = '%0.2f sec' % time_length
if time_length < 5:
return time_string
elif time_length < 120:
return '<span style="color: #900">%s</span>' % time_string
else:
return '<span style="background-color: #600; color: #fff">%s</span>' % time_string
def shorten(s):
if len(s) > 60:
return s[:40]+'...'+s[-10:]
else:
return s
def make_watch_threads(global_conf, allow_kill=False):
from paste.deploy.converters import asbool
return WatchThreads(allow_kill=asbool(allow_kill))
make_watch_threads.__doc__ = WatchThreads.__doc__
def make_bad_app(global_conf, pause=0):
pause = int(pause)
def bad_app(environ, start_response):
import thread
if pause:
time.sleep(pause)
else:
count = 0
while 1:
print "I'm alive %s (%s)" % (count, thread.get_ident())
time.sleep(10)
count += 1
start_response('200 OK', [('content-type', 'text/plain')])
return ['OK, paused %s seconds' % pause]
return bad_app
|