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comparison Resources/OrthancWSIClearCache.py @ 73:a8c90aa32ca6

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LRU caching of pyramids, OrthancWSIClearCache script
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 28 Nov 2016 16:51:19 +0100
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children ff0ef01c332c
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72:ea6309f70f1f 73:a8c90aa32ca6
1 #!/usr/bin/python
2
3 # Orthanc - A Lightweight, RESTful DICOM Store
4 # Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
5 # Department, University Hospital of Liege, Belgium
6 #
7 # This program is free software: you can redistribute it and/or
8 # modify it under the terms of the GNU Affero General Public License
9 # as published by the Free Software Foundation, either version 3 of
10 # the License, or (at your option) any later version.
11 #
12 # This program is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 # Affero General Public License for more details.
16 #
17 # You should have received a copy of the GNU Affero General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20
21 import base64
22 import httplib2
23 import json
24 import os
25 import sys
26
27 if len(sys.argv) != 3 and len(sys.argv) != 5:
28 print("""
29 Script to reinitialize the cache of the whole-slide imaging plugin for
30 Orthanc. Please make sure that Orthanc is running before starting this
31 script.
32
33 Usage: %s [hostname] [HTTP port]
34 Usage: %s [hostname] [HTTP port] [username] [password]
35 For instance: %s 127.0.0.1 8042
36 """ % (sys.argv[0], sys.argv[0], sys.argv[0]))
37 exit(-1)
38
39
40 METADATA=4200
41
42
43 def RunHttpRequest(uri, method, body = None):
44 http = httplib2.Http()
45 headers = { }
46
47 if len(sys.argv) == 5:
48 username = sys.argv[4]
49 password = sys.argv[5]
50
51 # h.add_credentials(username, password)
52
53 # This is a custom reimplementation of the
54 # "Http.add_credentials()" method for Basic HTTP Access
55 # Authentication (for some weird reason, this method does not
56 # always work)
57 # http://en.wikipedia.org/wiki/Basic_access_authentication
58 headers['authorization'] = 'Basic ' + base64.b64encode(username + ':' + password)
59
60 url = 'http://%s:%d/%s' % (sys.argv[1], int(sys.argv[2]), uri)
61 resp, content = http.request(url, method,
62 body = body,
63 headers = headers)
64
65 if resp.status != 200:
66 raise Exception('Cannot %s on URL %s, HTTP status %d '
67 '(Is Orthanc running? Is there a password?)' %
68 (method, url, resp.status))
69 else:
70 return content.decode('utf8')
71
72
73 for instance in json.loads(RunHttpRequest('/instances', 'GET')):
74 print('Clearing cache for instance %s' % instance)
75 RunHttpRequest('/instances/%s/metadata/%s' % (instance, METADATA), 'DELETE')
76
77 print('The WSI cache was successfully cleared')