def flatten(stan, ctx=None):
"""Given the stan and the optional context, return a string containing the
representation of the tree in the given context.
"""
if ctx is None:
from nevow.context import RequestContext, PageContext
ctx = PageContext(tag=None, parent=RequestContext(tag=testutil.FakeRequest()))
ctx.remember(None, inevow.IData)
result = []
list(iterflatten(stan, ctx, result.append))
return tags.raw(''.join(result))
def flatten(stan, ctx=None):
"""Given the stan and the optional context, return a string containing the
representation of the tree in the given context.
"""
if ctx is None:
from nevow.context import RequestContext, PageContext
from nevow.testutil import FakeRequest
ctx = PageContext(tag=None, parent=RequestContext(tag=FakeRequest()))
ctx.remember(None, inevow.IData)
result = []
list(iterflatten(stan, ctx, result.append))
return tags.raw(''.join(result))
class FourOhFour:
"""A simple 404 (not found) page.
"""
implements(inevow.IResource)
notFound = "<html><head><title>Page Not Found</title></head><body>Sorry, but I couldn't find the object you requested.</body></html>"
original = None
def locateChild(self, ctx, segments):
return NotFound
def renderHTTP(self, ctx):
inevow.IRequest(ctx).setResponseCode(404)
# Look for an application-remembered handler
try:
notFoundHandler = ctx.locate(inevow.ICanHandleNotFound)
except KeyError, e:
return self.notFound
# Call the application-remembered handler but if there are any errors
# then log it and fallback to the standard message.
try:
return notFoundHandler.renderHTTP_notFound(
PageContext(parent=ctx, tag=notFoundHandler))
except:
log.err()
return self.notFound
def renderHTTP(self, ctx):
from twisted.protocols import http
inevow.IRequest(ctx).setResponseCode(404)
try:
notFoundHandler = ctx.locate(inevow.ICanHandleNotFound)
return notFoundHandler.renderHTTP_notFound(
PageContext(parent=ctx, tag=notFoundHandler))
except KeyError, e:
return self.notFound
def renderHTTP(self, ctx):
inevow.IRequest(ctx).setResponseCode(404)
# Look for an application-remembered handler
try:
notFoundHandler = ctx.locate(inevow.ICanHandleNotFound)
except KeyError as e:
return self.notFound
# Call the application-remembered handler but if there are any errors
# then log it and fallback to the standard message.
try:
return notFoundHandler.renderHTTP_notFound(
PageContext(parent=ctx, tag=notFoundHandler))
except:
log.err()
return self.notFound
def renderSynchronously(self, ctx=None):
"""Render this page synchronously, returning a string result immediately.
Raise an exception if a Deferred is required to complete the rendering
process.
"""
io = StringIO()
ctx = PageContext(parent=ctx, tag=self)
self.rememberStuff(ctx)
doc = self.docFactory.load(ctx)
ctx = WovenContext(ctx, tags.invisible[doc])
def raiseAlways(item):
raise NotImplementedError("renderSynchronously can not support"
" rendering: %s" % (item, ))
list(flat.iterflatten(doc, ctx, io.write, raiseAlways))
return io.getvalue()
def renderString(self, ctx=None):
"""Render this page outside of the context of a web request, returning
a Deferred which will result in a string.
If twisted is not installed, this method will return a string result immediately,
and this method is equivalent to renderSynchronously.
"""
io = StringIO()
writer = io.write
def finisher(result):
return io.getvalue()
ctx = PageContext(parent=ctx, tag=self)
self.rememberStuff(ctx)
doc = self.docFactory.load(ctx)
ctx = WovenContext(ctx, tags.invisible[doc])
return self.flattenFactory(doc, ctx, writer, finisher)