X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-web.git/blobdiff_plain/dc5962060920e5b064064f10e539d49a68c9da68..4aa59cefff165e527b2a32642fea1be3c983705c:/code/validation.py

diff --git a/code/validation.py b/code/validation.py
index 860bac3..fe6d7c8 100644
--- a/code/validation.py
+++ b/code/validation.py
@@ -4,9 +4,10 @@ import cache_acls
 import getafsgroups
 import re
 import string
+import dns.resolver
 from invirt.database import Machine, NIC, Type, Disk, CDROM, Autoinstall
 from invirt.config import structs as config
-from webcommon import InvalidInput
+from invirt.common import InvalidInput
 
 MAX_MEMORY_TOTAL = 512
 MAX_MEMORY_SINGLE = 256
@@ -270,11 +271,33 @@ def testName(user, name, machine=None):
     name = name.lower()
     if machine is not None and name == machine.name:
         return None
-    if not Machine.query().filter_by(name=name).count():
+    try:
+        hostname = '%s.%s.' % (name, config.dns.domains[0])
+        resolver = dns.resolver.Resolver()
+        resolver.nameservers = ['127.0.0.1']
+        try:
+            resolver.query(hostname, 'A')
+        except dns.resolver.NoAnswer, e:
+            # If we can get the TXT record, then we can verify it's
+            # reserved. If this lookup fails, let it bubble up and be
+            # dealt with
+            answer = resolver.query(hostname, 'TXT')
+            txt = answer[0].strings[0]
+            if txt.startswith('reserved'):
+                raise InvalidInput('name', name, 'The name you have requested has been %s. For more information, contact us at %s' % (txt, config.dns.contact))
+
+        # If the hostname didn't exist, it would have thrown an
+        # exception by now - error out
+        raise InvalidInput('name', name, 'Name is already taken.')
+    except dns.resolver.NXDOMAIN, e:
         if not validMachineName(name):
             raise InvalidInput('name', name, 'You must provide a machine name.  Max 63 chars, alnum plus \'-\', does not begin or end with \'-\'.')
         return name
-    raise InvalidInput('name', name, "Name is already taken.")
+    except InvalidInput:
+        raise
+    except:
+        # Any other error is a validation failure
+        raise InvalidInput('name', name, 'We were unable to verify that this name is available. If you believe this is in error, please contact us at %s' % config.dns.contact)
 
 def testDescription(user, description, machine=None):
     if description is None or description.strip() == '':