Set hard limit on number of commands in batch request to 256.

ticket 984

ipalib/errors.py

@@ -1471,6 +1471,23 @@ class NotRegisteredError(ExecutionError):
     format = _('Not registered yet')
 
 
+class BatchRequestLimitError(ExecutionError):
+    """
+    **4307** Raised when a batch request contains too many commands
+
+    For example:
+    >>> raise BatchRequestLimitError(limit=128)
+    Traceback (most recent call last):
+      ...
+    BatchRequestLimitError: Too many commands in request, limit is 128
+
+    """
+
+    errno = 4307
+    format = _('Too many commands in request, limit is %(limit)s')
+
+
+
 ##############################################################################
 # 5000 - 5999: Generic errors
 

ipalib/plugins/batch.py

@@ -80,6 +80,8 @@ class batch(Command):
 
     def execute(self, *args, **options):
         results=[]
+        if len(args[0]) > 256:
+            raise errors.BatchRequestLimitError(limit=256)
         for arg in args[0]:
             try:
                 a = arg['params'][0]