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+# Copyright (c) 2012, Calxeda Inc.
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+# * Neither the name of Calxeda Inc. nor the names of its contributors
+# may be used to endorse or promote products derived from this software
+# without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+# DAMAGE.
+
+
+"""Tool-independent mix-in for parsing IPMI results"""
+
+from pyipmi import IpmiError
+import string
+import inspect
+
+
+def str_to_list(val, **params):
+ """convert string to list of substrings (default: single words)"""
+ val = val.strip()
+ if val == '':
+ return []
+
+ delimiter = params.get('delimiter', " ")
+ return map(string.strip, val.split(delimiter))
+
+
+def str2bool(val):
+ """True if val is 'true', 'yes' or 'enabled, otherwise false"""
+ return val.lower() in ['true', 'yes', 'enabled']
+
+
+def str_to_dict(val, **params):
+ """Returns the contents of the string 'val' as a dictionary"""
+ result = {}
+ operator = params.get('operator', ':')
+ delimiter = params.get('delimiter', '\n')
+ value_parser = params.get('value_parser', str)
+
+ params['operator'] = params.get('value_operator', None)
+ params['delimiter'] = params.get('value_delimiter', None)
+
+ entries = val.split(delimiter)
+ for entry in entries:
+ key, op, value = entry.partition(operator)
+ result[field_to_attr(key.strip())] = value_parser(value)
+ return result
+
+
+def paren_pair(val):
+ """Convert 'foo (bar)' to ['foo', 'bar']"""
+ return [p.strip(' )') for p in val.split('(')]
+
+
+def field_to_attr(field_name):
+ """Convert a field name to an attribute name
+
+ Make the field all lowercase and replace ' ' with '_'
+ (replace space with underscore)
+ """
+ result = field_name.lower()
+ if result[0:1].isdigit():
+ result = "n_" + result
+ result = result.replace(' ', '_')
+ result = result.replace('/', '_')
+ result = result.replace('-', '_')
+ result = result.replace('.', '_')
+ result = result.replace('+', '_plus')
+ return result
+
+
+class ResponseParserMixIn(object):
+ """Add this MixIn to a Command to enable it to parse response strings into
+ response data structures"""
+
+ """
+ Supplied parse methods are parse_colon_record() (the default) and
+ parse_colon_record_list(). Override the default in a derived class
+ by setting the "response_parser" field to the name of the desired
+ method.
+ """
+
+ def parse_colon_record(self, response, err):
+ """Parse records of key : value separated lines
+
+ This expects response to be a string of newline separated
+ field/value pairs, with each field/value being separated by a
+ colon and optional whitespace.
+
+ Records this parses look like this:
+
+ Sensor Data Type : Blah
+ Somefield : Somevalue
+
+ The type of the result returned and the conversion of key/values
+ in the text result to attribute names/values in the returned object
+ are determined by calling get_response_types on this command instance,
+ which gives a way for the result type and mapping to change based
+ on the contents of the response.
+ """
+ result_type, mapping = self.get_response_types(response)
+
+ if result_type == None:
+ return None
+
+ obj = result_type()
+ line, sep, rest = response.partition('\n')
+ left_over = []
+ while line != '':
+ colon_index = 10000000
+ if line.find(':') != -1:
+ colon_index = line.index(':')
+ equal_index = 10000000
+ if line.find('=') != -1:
+ equal_index = line.index('=')
+ if colon_index == 10000000 and equal_index == 10000000:
+ line, sep, rest = rest.partition('\n')
+ continue
+
+ field_seperator = min([colon_index, equal_index])
+ field = line[0:field_seperator].strip()
+ value = line[field_seperator + 1:].strip()
+
+ field_info = mapping.get(field)
+
+ if field_info == None:
+ left_over.append((field, value))
+ line, sep, rest = rest.partition('\n')
+ continue
+
+ lines_to_get = field_info.get('lines', 1) - 1
+ while lines_to_get > 0:
+ line, sep, rest = rest.partition('\n')
+ value += '\n' + line
+ lines_to_get -= 1
+
+ self.field_to_objval(obj, field_info, field, value)
+ line, sep, rest = rest.partition('\n')
+ return obj
+
+
+ def parse_colon_record_list(self, response, err):
+ """Parse multiple groups of colon records
+
+ Like colon records, but with multiple groups, each separated
+ by a blank line (two consecutive newline characters).
+
+ This returns a list of result objects rather than a single
+ result object. The type of each result object can vary based
+ on its contents, so the list isn't always of the same type
+ of objects.
+ """
+ results = []
+ records = response.split('\n\n')
+ for record in records:
+ obj = self.parse_colon_record(record.strip(), err)
+
+ if obj == None:
+ continue
+
+ results.append(obj)
+
+ return results
+
+
+ def parse_single_line(self, response, err):
+ obj = self.result_type()
+ attr_name = self.response_fields['attr']
+ setattr(obj, attr_name, response.strip())
+ return obj
+
+
+ def field_to_objval(self, obj, field_info, field_name, value):
+ """Assign a field's value to an attribute of obj
+
+ Arguments:
+ obj -- the object to set the attribute on. this is some record type
+ object - the exact varies depending on the command being
+ executed.
+ field_info -- a dict describing the field. See "Field Info" below for
+ more info.
+ field_name -- the name of the field as given in the IPMI results.
+ this will be used as the name of the attribute unless a
+ 'attr' key/value is given in the field_info dict.
+ value -- the value of the field as given in the IPMI results. This
+ value will be assigned to the attribute unless a 'parser'
+ key/value is specified in the field_info dict
+
+ Field Info:
+ If an 'attr' key/value is present, the value will be used for the
+ attribute name of this field instead of 'field_name'.
+
+ If a 'parser' key/value is present, the value will be passed to
+ it, and the result will be assigned to the attribute. The default
+ parser is str().
+ """
+ str_func = lambda x: str(x)
+ attr_name = field_info.get('attr', field_to_attr(field_name))
+ attr_parser = supplied_parser = field_info.get('parser', str_func)
+
+ args, varargs, keywords, defaults = inspect.getargspec(attr_parser)
+ if keywords == None:
+ attr_parser = lambda x, **y: supplied_parser(x)
+ setattr(obj, attr_name, attr_parser(value, **field_info))
+
+ def get_response_types(self, response):
+ """Return the result type and field mappings
+
+ The result type is the class of the result to be used. The field
+ mappings are given in self.response_fields, and are a
+ dict mapping field names to field info dicts. See 'field info' in
+ the doc for field_to_objval above.
+
+ Arguments:
+ response -- the text of the command response. It's not used in
+ this base method, but might be used in a subclass's version of
+ this method to allow different result types and mappings to be
+ used based on the contents of the response.
+ """
+ return self.result_type, self.response_fields
+
+ def parse_response(self, out, err):
+ """Parse the response to a command
+
+ Arguments:
+ out -- the text response of an IPMI command from stdout
+ err -- the text response of an IPMI command from stderr
+ """
+ return self.response_parser(out, err)
+
+ def parse_results(self, out, err):
+ """Parse the results if a result type is specified
+
+ If there is not 'result_type' attribute for this this command, return
+ None.
+ """
+ try:
+ result_type = self.result_type
+ except AttributeError:
+ return None
+
+ return self.parse_response(out, err)
+
+ def handle_command_error(self, out, err):
+ """Handle an error from running the command"""
+ raise IpmiError(err.strip())
+
+ response_parser = parse_colon_record