/
views.py
402 lines (339 loc) · 13 KB
/
views.py
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
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
#!/usr/bin/env python
# Licensed to Cloudera, Inc. under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. Cloudera, Inc. licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import os
import sys
import tempfile
import time
import traceback
import zipfile
from django.conf import settings
from django.shortcuts import render_to_response
from django.http import HttpResponse
from django.core.urlresolvers import reverse
from django.core.servers.basehttp import FileWrapper
from django.shortcuts import redirect
from django.utils.translation import ugettext as _
import django.views.debug
from desktop.lib import django_mako
from desktop.lib.conf import GLOBAL_CONFIG
from desktop.lib.django_util import login_notrequired, render_json, render, render_to_string
from desktop.lib.paths import get_desktop_root
from desktop.log.access import access_log_level, access_warn
from desktop.models import UserPreferences, Settings
from desktop import appmanager
import desktop.conf
import desktop.log.log_buffer
LOG = logging.getLogger(__name__)
@access_log_level(logging.WARN)
def home(request):
apps = appmanager.get_apps(request.user)
apps = dict([(app.name, app) for app in apps])
return render('home.mako', request, dict(apps=apps))
@access_log_level(logging.WARN)
def log_view(request):
"""
We have a log handler that retains the last X characters of log messages.
If it is attached to the root logger, this view will display that history,
otherwise it will report that it can't be found.
"""
if not request.user.is_superuser:
return HttpResponse(_("You must be a superuser."))
l = logging.getLogger()
for h in l.handlers:
if isinstance(h, desktop.log.log_buffer.FixedBufferHandler):
return render('logs.mako', request, dict(log=[l for l in h.buf], query=request.GET.get("q", "")))
return render('logs.mako', request, dict(log=[_("No logs found!")]))
@access_log_level(logging.WARN)
def download_log_view(request):
"""
Zip up the log buffer and then return as a file attachment.
"""
if not request.user.is_superuser:
return HttpResponse(_("You must be a superuser."))
l = logging.getLogger()
for h in l.handlers:
if isinstance(h, desktop.log.log_buffer.FixedBufferHandler):
try:
# We want to avoid doing a '\n'.join of the entire log in memory
# in case it is rather big. So we write it to a file line by line
# and pass that file to zipfile, which might follow a more efficient path.
tmp = tempfile.NamedTemporaryFile()
log_tmp = tempfile.NamedTemporaryFile("w+t")
for l in h.buf:
log_tmp.write(l + '\n')
# This is not just for show - w/out flush, we often get truncated logs
log_tmp.flush()
t = time.time()
zip = zipfile.ZipFile(tmp, "w", zipfile.ZIP_DEFLATED)
zip.write(log_tmp.name, "hue-logs/hue-%s.log" % t)
zip.close()
length = tmp.tell()
# if we don't seek to start of file, no bytes will be written
tmp.seek(0)
wrapper = FileWrapper(tmp)
response = HttpResponse(wrapper,content_type="application/zip")
response['Content-Disposition'] = 'attachment; filename=hue-logs-%s.zip' % t
response['Content-Length'] = length
return response
except Exception, e:
logging.exception("Couldn't construct zip file to write logs to.")
return log_view(request)
return render_to_response("logs.mako", dict(log=[_("No logs found.")]))
@access_log_level(logging.DEBUG)
def prefs(request, key=None):
"""Get or set preferences."""
if key is None:
d = dict( (x.key, x.value) for x in UserPreferences.objects.filter(user=request.user))
return render_json(d)
else:
if "set" in request.REQUEST:
try:
x = UserPreferences.objects.get(user=request.user, key=key)
except UserPreferences.DoesNotExist:
x = UserPreferences(user=request.user, key=key)
x.value = request.REQUEST["set"]
x.save()
return render_json(True)
if "delete" in request.REQUEST:
try:
x = UserPreferences.objects.get(user=request.user, key=key)
x.delete()
return render_json(True)
except UserPreferences.DoesNotExist:
return render_json(False)
else:
try:
x = UserPreferences.objects.get(user=request.user, key=key)
return render_json(x.value)
except UserPreferences.DoesNotExist:
return render_json(None)
def bootstrap(request):
"""Concatenates bootstrap.js files from all installed Hue apps."""
# Has some None's for apps that don't have bootsraps.
all_bootstraps = [ (app, app.get_bootstrap_file()) for app in appmanager.DESKTOP_APPS if request.user.has_hue_permission(action="access", app=app.name) ]
# Iterator over the streams.
concatenated = [ "\n/* %s */\n%s" % (app.name, b.read()) for app, b in all_bootstraps if b is not None ]
# HttpResponse can take an iteratable as the first argument, which
# is what happens here.
return HttpResponse(concatenated, mimetype='text/javascript')
_status_bar_views = []
def register_status_bar_view(view):
global _status_bar_views
_status_bar_views.append(view)
@access_log_level(logging.DEBUG)
def status_bar(request):
"""
Concatenates multiple views together to build up a "status bar"/"status_bar".
These views are registered using register_status_bar_view above.
"""
resp = ""
for view in _status_bar_views:
try:
r = view(request)
if r.status_code == 200:
resp += r.content
else:
LOG.warning("Failed to execute status_bar view %s" % (view,))
except:
LOG.exception("Failed to execute status_bar view %s" % (view,))
return HttpResponse(resp)
def dump_config(request):
# Note that this requires login (as do most apps).
show_private = False
conf_dir = os.path.realpath(os.getenv("HUE_CONF_DIR", get_desktop_root("conf")))
if not request.user.is_superuser:
return HttpResponse(_("You must be a superuser."))
if request.GET.get("private"):
show_private = True
apps = sorted(appmanager.DESKTOP_MODULES, key=lambda app: app.menu_index)
apps_names = [app.name for app in apps]
top_level = sorted(GLOBAL_CONFIG.get().values(), key=lambda obj: apps_names.index(obj.config.key))
return render("dump_config.mako", request, dict(
show_private=show_private,
top_level=top_level,
conf_dir=conf_dir,
apps=apps))
if sys.version_info[0:2] <= (2,4):
def _threads():
import threadframe
return threadframe.dict().iteritems()
else:
def _threads():
return sys._current_frames().iteritems()
@access_log_level(logging.WARN)
def threads(request):
"""Dumps out server threads. Useful for debugging."""
if not request.user.is_superuser:
return HttpResponse(_("You must be a superuser."))
out = []
for thread_id, stack in _threads():
out.append("Thread id: %s" % thread_id)
for filename, lineno, name, line in traceback.extract_stack(stack):
out.append(" %-20s %s(%d)" % (name, filename, lineno))
out.append(" %-80s" % (line))
out.append("")
return HttpResponse("\n".join(out), content_type="text/plain")
def jasmine(request):
return render('jasmine.mako', request, None)
def index(request):
if request.user.is_superuser:
return redirect(reverse('about:index'))
else:
return home(request)
def serve_404_error(request, *args, **kwargs):
"""Registered handler for 404. We just return a simple error"""
access_warn(request, "404 not found")
return render("404.mako", request, dict(uri=request.build_absolute_uri()))
def serve_500_error(request, *args, **kwargs):
"""Registered handler for 500. We use the debug view to make debugging easier."""
try:
exc_info = sys.exc_info()
if exc_info:
if desktop.conf.HTTP_500_DEBUG_MODE.get() and exc_info[0] and exc_info[1]:
# If (None, None, None), default server error describing why this failed.
return django.views.debug.technical_500_response(request, *exc_info)
else:
# Could have an empty traceback
return render("500.mako", request, {'traceback': traceback.extract_tb(exc_info[2])})
else:
# exc_info could be empty
return render("500.mako", request, {})
finally:
# Fallback to default 500 response if ours fails
# Will end up here:
# - Middleware or authentication backends problems
# - Certain missing imports
# - Packaging and install issues
pass
_LOG_LEVELS = {
"critical": logging.CRITICAL,
"error": logging.ERROR,
"warning": logging.WARNING,
"info": logging.INFO,
"debug": logging.DEBUG
}
_MAX_LOG_FRONTEND_EVENT_LENGTH = 1024
_LOG_FRONTEND_LOGGER = logging.getLogger("desktop.views.log_frontend_event")
@login_notrequired
def log_frontend_event(request):
"""
Logs arguments to server's log. Returns an
empty string.
Parameters (specified via either GET or POST) are
"logname", "level" (one of "debug", "info", "warning",
"error", or "critical"), and "message".
"""
def get(param, default=None):
return request.REQUEST.get(param, default)
level = _LOG_LEVELS.get(get("level"), logging.INFO)
msg = "Untrusted log event from user %s: %s" % (
request.user,
get("message", "")[:_MAX_LOG_FRONTEND_EVENT_LENGTH])
_LOG_FRONTEND_LOGGER.log(level, msg)
return HttpResponse("")
def who_am_i(request):
"""
Returns username and FS username, and optionally sleeps.
"""
try:
sleep = float(request.REQUEST.get("sleep") or 0.0)
except ValueError:
sleep = 0.0
time.sleep(sleep)
return HttpResponse(request.user.username + "\t" + request.fs.user + "\n")
def commonheader(title, section, user, padding="60px"):
"""
Returns the rendered common header
"""
if user.is_authenticated():
apps = appmanager.get_apps(user)
apps_list = sorted(apps, key=lambda app: app.menu_index)
else:
apps_list = []
return django_mako.render_to_string("common_header.mako", {
'apps': apps_list,
'title': title,
'section': section,
'padding': padding,
'user': user
})
def commonfooter(messages=None):
"""
Returns the rendered common footer
"""
if messages is None:
messages = {}
hue_settings = Settings.get_settings()
return django_mako.render_to_string("common_footer.mako", {
'messages': messages,
'version': settings.HUE_DESKTOP_VERSION,
'collect_usage': desktop.conf.COLLECT_USAGE.get(),
'tours_and_tutorials': hue_settings.tours_and_tutorials
})
# If the app's conf.py has a config_validator() method, call it.
CONFIG_VALIDATOR = 'config_validator'
#
# Cache config errors because (1) they mostly don't go away until restart,
# and (2) they can be costly to compute. So don't stress the system just because
# the dock bar wants to refresh every n seconds.
#
# The actual viewing of all errors may choose to disregard the cache.
#
_CONFIG_ERROR_LIST = None
def _get_config_errors(request, cache=True):
"""Returns a list of (confvar, err_msg) tuples."""
global _CONFIG_ERROR_LIST
if not cache or _CONFIG_ERROR_LIST is None:
error_list = [ ]
for module in appmanager.DESKTOP_MODULES:
# Get the config_validator() function
try:
validator = getattr(module.conf, CONFIG_VALIDATOR)
except AttributeError:
continue
if not callable(validator):
LOG.warn("Auto config validation: %s.%s is not a function" %
(module.conf.__name__, CONFIG_VALIDATOR))
continue
try:
error_list.extend(validator(request.user))
except Exception, ex:
LOG.exception("Error in config validation by %s: %s" % (module.nice_name, ex))
_CONFIG_ERROR_LIST = error_list
return _CONFIG_ERROR_LIST
def check_config(request):
"""Check config and view for the list of errors"""
if not request.user.is_superuser:
return HttpResponse(_("You must be a superuser."))
conf_dir = os.path.realpath(os.getenv("HUE_CONF_DIR", get_desktop_root("conf")))
return render('check_config.mako', request, dict(
error_list=_get_config_errors(request, cache=False),
conf_dir=conf_dir))
def check_config_ajax(request):
"""Alert administrators about configuration problems."""
if not request.user.is_superuser:
return HttpResponse('')
error_list = _get_config_errors(request)
if not error_list:
# Return an empty response, rather than using the mako template, for performance.
return HttpResponse('')
return render('config_alert_dock.mako',
request,
dict(error_list=error_list),
force_template=True)
register_status_bar_view(check_config_ajax)