def topology_clack_xml(request, tid, topo):
"""Creates XML that can be loaded with the Clack Graphical Router. Note
that this is different to the XML generated above: it tells Clack how to
retrieve the XML generated above, and how to layout the components in the
graphical view, etc. Most of the information is retrieved from a template,
and formatted by replacing $TOKEN with an authentication token and $AUTH_KEY
and $USERNAME with the user's simulation authentication key and username."""
# Get the template
try:
template = urllib2.urlopen("http://localhost/media/clack/template-%s.xml" % topo.template.name).read()
except urllib2.URLError:
raise
# Generate an authentication token, or use the one we currently have; if we
# make a new one, it's valid for 30 seconds
try:
token = request.GET['token']
except KeyError:
token = crypto.create_token(request.user, 30)
# Format the XML
template = template.replace("$TOKEN", token, 1)
template = template.replace("$AUTH_KEY", request.user.get_profile().sim_key, 1)
template = template.replace("$USERNAME", request.user.username, 1)
template = template.replace("$TOPOLOGY", str(tid), 2)
# Return it
return HttpResponse(template, "text/xml")
def topology_run_clack(request, tid, topo):
"""Runs clack from an applet for this topology"""
tn = 'vns/clack.html'
# Generate an authentication token valid for 30 seconds, or use the one we
# currently have
try:
token = request.GET['token']
except KeyError:
token = crypto.create_token(request.user, 30)
return direct_to_template(request, tn, {'tid':tid, 'token':token})
def topology_info(request, tid, topo):
# Create an authentication token valid for 3 minutes for the user to access
# Clack stuff with, or use the current token if there is one
try:
token = request.GET['token']
except KeyError:
token = crypto.create_token(request.user, 180)
# See what permissions the user has on this topology
can_change = permissions.allowed_topology_access_change(request.user, topo)
can_delete = permissions.allowed_topology_access_change(request.user, topo)
return direct_to_template(request, 'vns/topology.html', {'t':topo,
'tid':tid,
'token':token,
'change':can_change,
'delete':can_delete})
