| author | Tero Marttila <terom@paivola.fi> |
| Sat, 26 Jan 2013 17:52:40 +0200 | |
| changeset 178 | f9f5e669bace |
| parent 164 | 2c66ab45d91e |
| child 197 | 9f18b11647fb |
| permissions | -rw-r--r-- |
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split pvl.web from pvl.verkko, rename test.py -> pvl.verkko-dhcp
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""" |
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178
f9f5e669bace
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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parents:
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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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import logging; log = logging.getLogger('pvl.web.application')
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class Application (object) : |
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""" |
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pvl.web.rrd: support --web-layout to use external template
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Main wsgi entry point state. |
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parents:
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""" |
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parents:
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URLS = None |
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pvl.web.rrd: support --web-layout to use external template
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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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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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parents:
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parents:
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def respond (self, request) : |
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""" |
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parents:
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Lookup Request -> web.Handler, params |
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parents:
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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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parents:
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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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parents:
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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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parents:
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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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parents:
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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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|
96 |
def url (self, handler=None, **params) : |
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|
97 |
""" |
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parents:
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|
98 |
Return an URL for given endpoint, with parameters, |
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parents:
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|
99 |
""" |
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|
100 |
|
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parents:
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|
101 |
if not handler : |
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parents:
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|
102 |
# XXX: just generate a plain-relative '?foo=...' url instead? |
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parents:
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|
103 |
handler = self.__class__ |
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parents:
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|
104 |
params = merge(self.params, params) |
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parents:
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|
105 |
|
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parents:
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|
106 |
return self.urls.build(handler, params) |
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parents:
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|
107 |
|
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parents:
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|
108 |
def title (self) : |
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parents:
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|
109 |
""" |
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parents:
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|
110 |
Render site/page title as text. |
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parents:
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|
111 |
""" |
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parents:
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|
112 |
|
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parents:
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|
113 |
return self.TITLE |
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parents:
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|
114 |
|
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parents:
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|
115 |
def render (self) : |
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116 |
""" |
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parents:
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|
117 |
Render page content (as <body>...</body>). |
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|
118 |
""" |
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parents:
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|
119 |
|
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parents:
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|
120 |
raise NotImplementedError() |
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|
121 |
|
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parents:
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|
122 |
def render_html (self) : |
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parents:
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|
123 |
""" |
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parents:
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|
124 |
Render page layout (as <html>). |
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parents:
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|
125 |
""" |
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parents:
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|
126 |
|
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parents:
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|
127 |
title = self.title() |
|
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|
128 |
head = html( |
|
151
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|
129 |
( |
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parents:
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|
130 |
html.link(rel='Stylesheet', type="text/css", href=src) for src in self.CSS |
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parents:
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|
131 |
), |
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parents:
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|
132 |
( |
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parents:
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|
133 |
html.script(src=src, type='text/javascript', _selfclosing=False) for src in self.JS |
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parents:
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|
134 |
), |
|
164
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diff
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|
135 |
) |
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|
136 |
body = html(self.render()) |
|
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|
137 |
|
|
178
f9f5e669bace
pvl.verkko: refactor into dhcp -> hosts -> web+db modules, reworking index page
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parents:
164
diff
changeset
|
138 |
if not title : |
|
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diff
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|
139 |
raise Exception("%s: no page title!" % (self, ))
|
|
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|
140 |
|
|
164
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|
141 |
if self.app.layout : |
|
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|
142 |
return self.app.layout.format( |
|
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|
143 |
TITLE = unicode(title), |
|
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parents:
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|
144 |
HEAD = unicode(head), |
|
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|
145 |
BODY = unicode(body), |
|
151
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parents:
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|
146 |
) |
|
164
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|
147 |
else : |
|
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diff
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|
148 |
return html.document(html.html( |
|
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parents:
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|
149 |
html.head( |
|
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parents:
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diff
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|
150 |
html.title(title), |
|
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pvl.web.rrd: support --web-layout to use external template
Tero Marttila <terom@paivola.fi>
parents:
151
diff
changeset
|
151 |
head, |
|
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Tero Marttila <terom@paivola.fi>
parents:
151
diff
changeset
|
152 |
), |
|
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parents:
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diff
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|
153 |
html.body( |
|
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151
diff
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|
154 |
html.h1(title), |
|
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151
diff
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|
155 |
body, |
|
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parents:
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diff
changeset
|
156 |
) |
|
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parents:
151
diff
changeset
|
157 |
)) |
|
151
8a9f01036091
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parents:
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changeset
|
158 |
|
|
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Tero Marttila <terom@paivola.fi>
parents:
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changeset
|
159 |
def process (self, **params) : |
|
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parents:
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|
160 |
""" |
|
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Tero Marttila <terom@paivola.fi>
parents:
diff
changeset
|
161 |
Process request args to build internal request state. |
|
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parents:
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|
162 |
""" |
|
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parents:
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changeset
|
163 |
|
|
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parents:
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|
164 |
pass |
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parents:
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|
165 |
|
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Tero Marttila <terom@paivola.fi>
parents:
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|
166 |
def respond (self) : |
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parents:
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|
167 |
""" |
|
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parents:
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changeset
|
168 |
Generate a response, or raise an HTTPException |
|
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parents:
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|
169 |
|
|
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Tero Marttila <terom@paivola.fi>
parents:
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changeset
|
170 |
Does an HTML layout'd response per default. |
|
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parents:
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|
171 |
""" |
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parents:
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|
172 |
|
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parents:
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|
173 |
# returning e.g. redirect? |
|
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parents:
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|
174 |
response = self.process(**self.params) |
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parents:
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|
175 |
|
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parents:
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|
176 |
if response : |
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parents:
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|
177 |
return response |
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parents:
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|
178 |
|
|
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parents:
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|
179 |
# render as html per default |
|
164
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|
180 |
text = unicode(self.render_html()) |
|
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|
181 |
|
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parents:
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|
182 |
return Response(text, mimetype='text/html') |
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parents:
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|
183 |
|
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parents:
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|
184 |
def cleanup (self) : |
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|
185 |
""" |
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parents:
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|
186 |
After request processing. Do not fail :) |
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|
187 |
""" |
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|
188 |
|
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|
189 |
pass |