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# Copyright (C) 2004 Mike Wray <mike.wray@hp.com>
from twisted.web import error
from xen.xend import sxp
from SrvBase import SrvBase
class SrvConstructor:
"""Delayed constructor for sub-servers.
Does not import the sub-server class or create the object until needed.
"""
def __init__(self, klass):
"""Create a constructor. It is assumed that the class
should be imported as 'import klass from klass'.
klass name of its class
"""
self.klass = klass
self.obj = None
def getobj(self):
"""Get the sub-server object, importing its class and instantiating it if
necessary.
"""
if not self.obj:
exec 'from %s import %s' % (self.klass, self.klass)
klassobj = eval(self.klass)
self.obj = klassobj()
return self.obj
class SrvDir(SrvBase):
"""Base class for directory servlets.
"""
isLeaf = False
def __init__(self):
SrvBase.__init__(self)
self.table = {}
self.order = []
def getChild(self, x, req):
if x == '': return self
val = self.get(x)
if val is None:
return error.NoResource('Not found')
else:
return val
def get(self, x):
val = self.table.get(x)
if val is not None:
val = val.getobj()
return val
def add(self, x, xclass = None):
if xclass is None:
xclass = 'SrvDir'
self.table[x] = SrvConstructor(xclass)
self.order.append(x)
def render_GET(self, req):
if self.use_sxp(req):
req.setHeader("Content-type", sxp.mime_type)
self.ls(req, 1)
else:
req.write('<html><head></head><body>')
self.print_path(req)
self.ls(req)
self.form(req)
req.write('</body></html>')
return ''
def ls(self, req, use_sxp=0):
url = req.prePathURL()
if not url.endswith('/'):
url += '/'
if use_sxp:
req.write('(ls ')
for k in self.order:
req.write(' ' + k)
req.write(')')
else:
req.write('<ul>')
for k in self.order:
v = self.get(k)
req.write('<li><a href="%s%s">%s</a></li>'
% (url, k, k))
req.write('</ul>')
def form(self, req):
pass
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