`flow.record.base`#

Module Contents#

Classes#

`Peekable`	Wrapper class for adding .peek() to a file object.
`FieldType`
`Record`
`GroupedRecord`	GroupedRecord acts like a normal Record, but can contain multiple records.
`RecordField`
`RecordFieldSet`	Built-in mutable sequence.
`RecordDescriptor`	Record Descriptor class for defining a Record type and its fields.
`DynamicFieldtypeModule`

Functions#

`is_valid_field_name`
`parse_def`
`DynamicDescriptor`
`open_path`	Open path using mode and returns a file object.
`RecordAdapter`
`RecordReader`
`RecordWriter`
`stream`
`fieldtype`	Return the FieldType class for the given field type class path.
`merge_record_descriptors`	Create a newly merged RecordDescriptor from a list of RecordDescriptors.
`extend_record`	Extend `record` with fields and values from `other_records`.
`iter_timestamped_records`	Yields timestamped annotated records for each datetime fieldtype in record.

Attributes#

`HAS_LZ4`
`HAS_BZ2`
`HAS_ZSTD`
`log`
`RECORD_VERSION`
`RESERVED_FIELDS`
`GZIP_MAGIC`
`BZ2_MAGIC`
`LZ4_MAGIC`
`ZSTD_MAGIC`
`RE_VALID_FIELD_NAME`
`RE_VALID_RECORD_TYPE_NAME`
`RECORD_CLASS_TEMPLATE`
`net`
`dynamic_fieldtype`
`TimestampRecord`

flow.record.base.HAS_LZ4 = True#

flow.record.base.HAS_BZ2 = True#

flow.record.base.HAS_ZSTD = True#

flow.record.base.log#

flow.record.base.RECORD_VERSION = 1#

flow.record.base.RESERVED_FIELDS#

flow.record.base.GZIP_MAGIC = b'\x1f\x8b'#

flow.record.base.BZ2_MAGIC = b'BZh'#

flow.record.base.LZ4_MAGIC = b'\x04"M\x18'#

flow.record.base.ZSTD_MAGIC = b'(\xb5/\xfd'#

flow.record.base.RE_VALID_FIELD_NAME#

flow.record.base.RE_VALID_RECORD_TYPE_NAME#

flow.record.base.RECORD_CLASS_TEMPLATE = Multiline-String#

Show Value

"""
class {name}(Record):
    _desc = None
    _field_types = {field_types}

    __slots__ = {slots_tuple}

    def __init__(__self, {args}):
{init_code}

    @classmethod
    def _unpack(__cls, {args}):
{unpack_code}
"""

class flow.record.base.Peekable(fd)#

Wrapper class for adding .peek() to a file object.

peek(size)#

read(size=None)#

close()#

class flow.record.base.FieldType#

classmethod default()#: Return the default value for the field in the Record template.

class flow.record.base.Record#

__slots__ = ()#

__eq__(other)#: Return self==value.

__setattr__(k, v)#: Enforce setting the fields to their respective types.

__repr__()#: Return repr(self).

class flow.record.base.GroupedRecord(name, records)#

Bases: Record

GroupedRecord acts like a normal Record, but can contain multiple records.

See it as a flat Record view on top of multiple Records. If two Records have the same fieldname, the first one will prevail.

get_record_by_type(type_name)#

Get record in a GroupedRecord by type_name.

Parameters:: type_name (str) – The record type name (for example wq/meta).
Returns:: None or the record

__repr__()#: Return repr(self).

__setattr__(attr, val)#: Enforce setting the fields to their respective types.

__getattr__(attr)#

flow.record.base.is_valid_field_name(name, check_reserved=True)#

flow.record.base.parse_def(definition)#

class flow.record.base.RecordField(name: str, typename: str)#

name#

typename#

type#

__repr__()#: Return repr(self).

class flow.record.base.RecordFieldSet#

Bases: list

Built-in mutable sequence.

If no argument is given, the constructor creates a new empty list. The argument must be an iterable if specified.

class flow.record.base.RecordDescriptor(name: str, fields: Optional[Sequence[Tuple[str, str]]] = None)#

Record Descriptor class for defining a Record type and its fields.

property fields: Mapping[str, RecordField]#

Get fields mapping (without required fields). eg:

{: “foo”: RecordField(“foo”, “string”), “bar”: RecordField(“bar”, “varint”),

}

Returns:: Mapping of Record fields

property descriptor_hash: int#: Returns the (cached) descriptor hash

property identifier: Tuple[str, int]#: Returns a tuple containing the descriptor name and hash

name: str#

recordType: type#

static get_required_fields() → Mapping[str, RecordField]#

Get required fields mapping. eg:

{: “_source”: RecordField(“_source”, “string”), “_classification”: RecordField(“_classification”, “datetime”), “_generated”: RecordField(“_generated”, “datetime”), “_version”: RecordField(“_version”, “vaeint”),

}

Returns:: Mapping of required fields

get_all_fields() → Mapping[str, RecordField]#

Get all fields including required meta fields. eg:

{: “ts”: RecordField(“ts”, “datetime”), “foo”: RecordField(“foo”, “string”), “bar”: RecordField(“bar”, “varint”), “_source”: RecordField(“_source”, “string”), “_classification”: RecordField(“_classification”, “datetime”), “_generated”: RecordField(“_generated”, “datetime”), “_version”: RecordField(“_version”, “vaeint”),

}

Returns:: Mapping of all Record fields

getfields(typename: str) → RecordFieldSet#

Get fields of a given type.

Parameters:: typename – The typename of the fields to return. eg: “string” or “datetime”
Returns:: RecordFieldSet of fields with the given typename

__call__(*args, **kwargs) → Record#: Create a new Record initialized with args and kwargs.

init_from_dict(rdict: Dict[str, Any], raise_unknown=False) → Record#

Create a new Record initialized with key, value pairs from rdict.

If raise_unknown=True then fields on rdict that are unknown to this RecordDescriptor will raise a TypeError exception due to initializing with unknown keyword arguments. (default: False)

Returns:: Record with data from rdict

init_from_record(record: Record, raise_unknown=False) → Record#

Create a new Record initialized with data from another record.

If raise_unknown=True then fields on record that are unknown to this RecordDescriptor will raise a TypeError exception due to initializing with unknown keyword arguments. (default: False)

Returns:: Record with data from record

extend(fields: Sequence[Tuple[str, str]]) → RecordDescriptor#

Returns a new RecordDescriptor with the extended fields

Returns:: RecordDescriptor with extended fields

get_field_tuples() → Tuple[Tuple[str, str]]#

Returns a tuple containing the (typename, name) tuples, eg:

((‘boolean’, ‘foo’), (‘string’, ‘bar’))

Returns:: Tuple of (typename, name) tuples

static calc_descriptor_hash(name, fields: Sequence[Tuple[str, str]]) → int#

Calculate and return the (cached) descriptor hash as a 32 bit integer.

The descriptor hash is the first 4 bytes of the sha256sum of the descriptor name and field names and types.

__hash__() → int#: Return hash(self).

__eq__(other: RecordDescriptor) → bool#: Return self==value.

__repr__() → str#: Return repr(self).

definition(reserved: bool = True) → str#

Return the RecordDescriptor as Python definition string.

If reserved is True it will also return the reserved fields.

Returns:: Descriptor definition string

base(**kwargs_sink)#

flow.record.base.DynamicDescriptor(name, fields)#

flow.record.base.open_path(path, mode, clobber=True)#

Open path using mode and returns a file object.

It handles special cases if path is meant to be stdin or stdout. And also supports compression based on extension or file header of stream.

Parameters:

path (str) – Filename or path to filename to open
mode (str) – Could be “r”, “rb” to open file for reading, “w”, “wb” for writing
clobber (bool) – Overwrite file if it already exists if clobber=True, else raises IOError.

flow.record.base.RecordAdapter(url, out, selector=None, clobber=True, **kwargs)#

flow.record.base.RecordReader(url=None, selector=None, **kwargs)#

flow.record.base.RecordWriter(url=None, clobber=True, **kwargs)#

flow.record.base.stream(src, dst)#

flow.record.base.fieldtype(clspath: str) → FieldType#

Return the FieldType class for the given field type class path.

Parameters:: clspath – class path of the field type. eg: uint32, net.ipaddress, string[]
Returns:: The FieldType class.

flow.record.base.merge_record_descriptors(descriptors: Tuple[RecordDescriptor], replace: bool = False, name: Optional[str] = None) → RecordDescriptor#

Create a newly merged RecordDescriptor from a list of RecordDescriptors. This function uses a cache to avoid creating the same descriptor multiple times.

Duplicate fields are ignored in descriptors unless replace=True.

Parameters:

descriptors – Tuple of RecordDescriptors to merge.
replace – if True, it will replace existing field names. Last descriptor always wins.
name – rename the RecordDescriptor name to name. Otherwise, use name from first descriptor.

Returns:

Merged RecordDescriptor

flow.record.base.extend_record(record: Record, other_records: List[Record], replace: bool = False, name: Optional[str] = None) → Record#

Extend record with fields and values from other_records.

Duplicate fields are ignored in other_records unless replace=True.

Parameters:

record – Initial Record to extend.
other_records – List of Records to use for extending/replacing.
replace – if True, it will replace existing fields and values in record from fields and values from other_records. Last record always wins.
name – rename the RecordDescriptor name to name. Otherwise, use name from initial record.

Returns:

Extended Record

class flow.record.base.DynamicFieldtypeModule(path='')#

__getattr__(path)#

gettypename()#

__call__(*args, **kwargs)#

flow.record.base.net#

flow.record.base.dynamic_fieldtype#

flow.record.base.TimestampRecord#

flow.record.base.iter_timestamped_records(record: Record) → Iterator[Record]#

Yields timestamped annotated records for each datetime fieldtype in record. If record does not have any datetime fields the original record is returned.

Parameters:: record – Record to add timestamp fields for.
Yields:: Record annotated with ts and ts_description fields for each datetime fieldtype.

flow.record.base#

Module Contents#

Classes#

Functions#

Attributes#

`flow.record.base`#