| author | Tero Marttila <terom@paivola.fi> |
| Sun, 10 Feb 2013 13:18:01 +0200 | |
| changeset 203 | 8dc7db817818 |
| parent 197 | 9f18b11647fb |
| child 347 | d368f3b8a117 |
| permissions | -rw-r--r-- |
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""" |
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pvl.verkko: refactor into dhcp -> hosts -> web+db modules, reworking index page
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WSGI Application with pvl.web.urls-mapped Handlers building pvl.web.html. |
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""" |
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import werkzeug |
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from werkzeug.wrappers import Request, Response |
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from werkzeug.exceptions import HTTPException |
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pvl.web.response: html/json/image response encodings
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import pvl.web.response |
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import logging; log = logging.getLogger('pvl.web.application')
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class Application (object) : |
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""" |
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Main wsgi entry point state. |
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""" |
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URLS = None |
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# TODO: charset |
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def __init__ (self, urls=None, layout=None) : |
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""" |
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urls - werkzeug.routing.Map -> Handler |
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layout - template with {TITLE} and {HEAD} and {BODY}
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""" |
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if not urls : |
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urls = self.URLS |
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parents:
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if not urls : |
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raise ValueError("No URLS/urls=... given")
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self.layout = layout |
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self.urls = urls |
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def respond (self, request) : |
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""" |
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Lookup Request -> web.Handler, params |
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""" |
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# bind to request |
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urls = self.urls.bind_to_environ(request) |
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# lookup |
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handler, params = urls.match() |
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# handler instance |
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handler = handler(self, request, urls, params) |
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try : |
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# apply |
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return handler.respond() |
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finally : |
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handler.cleanup() |
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@Request.application |
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def __call__ (self, request) : |
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""" |
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WSGI entry point, werkzeug Request -> Response |
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""" |
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try : |
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return self.respond(request) |
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except HTTPException as ex : |
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return ex |
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from pvl.invoke import merge # XXX |
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from pvl.web.html import tags as html |
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class Handler (object) : |
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""" |
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Per-Request controller/view, containing the request context and generating the response. |
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""" |
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TITLE = None |
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CSS = ( |
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#"/static/...css", |
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) |
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JS = ( |
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#"/static/....js" |
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) |
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def __init__ (self, app, request, urls, params) : |
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""" |
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parents:
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app - wsgi.Application |
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parents:
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request - werkzeug.Request |
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parents:
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urls - werkzeug.routing.Map.bind_to_environ() |
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parents:
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""" |
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self.app = app |
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self.request = request |
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self.urls = urls |
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self.params = params |
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97 |
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self.init() |
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99 |
|
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def init (self) : |
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101 |
""" |
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102 |
Initialize on request. |
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103 |
""" |
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104 |
|
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105 |
def url (self, handler=None, **params) : |
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106 |
""" |
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107 |
Return an URL for given endpoint, with parameters, |
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108 |
""" |
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|
109 |
|
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|
110 |
if not handler : |
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|
111 |
# XXX: just generate a plain-relative '?foo=...' url instead? |
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|
112 |
handler = self.__class__ |
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113 |
params = merge(self.params, params) |
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114 |
|
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115 |
return self.urls.build(handler, params) |
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116 |
|
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117 |
def title (self) : |
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118 |
""" |
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|
119 |
Render site/page title as text. |
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120 |
""" |
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121 |
|
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122 |
return self.TITLE |
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123 |
|
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124 |
def render (self) : |
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125 |
""" |
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126 |
Render page content (as <body>...</body>). |
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127 |
""" |
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|
128 |
|
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129 |
raise NotImplementedError() |
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130 |
|
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131 |
def render_html (self) : |
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132 |
""" |
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|
133 |
Render page layout (as <html>). |
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134 |
""" |
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|
135 |
|
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136 |
title = self.title() |
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137 |
head = html( |
|
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|
138 |
( |
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139 |
html.link(rel='Stylesheet', type="text/css", href=src) for src in self.CSS |
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|
140 |
), |
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|
141 |
( |
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142 |
html.script(src=src, type='text/javascript', _selfclosing=False) for src in self.JS |
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|
143 |
), |
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|
144 |
) |
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145 |
body = html(self.render()) |
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146 |
|
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|
147 |
if not title : |
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148 |
raise Exception("%s: no page title!" % (self, ))
|
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|
149 |
|
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|
150 |
if self.app.layout : |
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151 |
return self.app.layout.format( |
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152 |
TITLE = unicode(title), |
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153 |
HEAD = unicode(head), |
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|
154 |
BODY = unicode(body), |
|
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|
155 |
) |
|
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|
156 |
else : |
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|
157 |
return html.document(html.html( |
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|
158 |
html.head( |
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|
159 |
html.title(title), |
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|
160 |
head, |
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|
161 |
), |
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|
162 |
html.body( |
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|
163 |
html.h1(title), |
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|
164 |
body, |
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|
165 |
) |
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|
166 |
)) |
|
151
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|
167 |
|
|
197
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diff
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|
168 |
def response_file (self, file) : |
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|
169 |
""" |
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|
170 |
Wrap a file for returning in a response with direct_passthrough=True. |
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|
171 |
""" |
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|
172 |
|
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|
173 |
return werkzeug.wrap_file(self.request.environ, file) |
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|
174 |
|
|
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|
175 |
def process (self, **params) : |
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176 |
""" |
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|
177 |
Process request args to build internal request state. |
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178 |
""" |
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179 |
|
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180 |
pass |
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181 |
|
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|
182 |
def respond (self) : |
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183 |
""" |
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|
184 |
Generate a response, or raise an HTTPException |
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|
185 |
|
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|
186 |
Does an HTML layout'd response per default. |
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187 |
""" |
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|
188 |
|
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|
189 |
# returning e.g. redirect? |
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190 |
response = self.process(**self.params) |
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191 |
|
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192 |
if response : |
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193 |
return response |
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194 |
|
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# render as html per default |
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pvl.web.response: html/json/image response encodings
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# XXX: might also be string? |
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pvl.web.rrd: support --web-layout to use external template
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text = unicode(self.render_html()) |
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split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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parents:
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changeset
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198 |
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pvl.web.response: html/json/image response encodings
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parents:
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return pvl.web.response.html(text) |
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split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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parents:
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changeset
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200 |
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8a9f01036091
split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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parents:
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def cleanup (self) : |
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split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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parents:
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202 |
""" |
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8a9f01036091
split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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parents:
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changeset
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203 |
After request processing. Do not fail :) |
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8a9f01036091
split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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parents:
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204 |
""" |
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8a9f01036091
split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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parents:
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205 |
|
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8a9f01036091
split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
Tero Marttila <terom@paivola.fi>
parents:
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206 |
pass |