chg: Make mail-parser an optional dependency

poetry.lock

@@ -271,7 +271,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "importlib-metadata"
-version = "3.0.0"
+version = "3.1.0"
 description = "Read metadata from Python packages"
 category = "main"
 optional = false
@@ -282,14 +282,14 @@ zipp = ">=0.5"
 
 [package.extras]
 docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
+testing = ["packaging", "pep517", "unittest2", "importlib-resources (>=1.3)"]
 
 [[package]]
 name = "ipaddress"
 version = "1.0.23"
 description = "IPv4/IPv6 manipulation library"
 category = "main"
-optional = false
+optional = true
 python-versions = "*"
 
 [[package]]
@@ -497,7 +497,7 @@ name = "mail-parser"
 version = "3.12.0"
 description = "Wrapper for email standard library"
 category = "main"
-optional = false
+optional = true
 python-versions = "*"
 
 [package.dependencies]
@@ -951,7 +951,7 @@ name = "simplejson"
 version = "3.17.0"
 description = "Simple, fast, extensible JSON encoder/decoder for Python"
 category = "main"
-optional = false
+optional = true
 python-versions = ">=2.5, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
@@ -1225,6 +1225,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 
 [extras]
 docs = ["sphinx-autodoc-typehints", "recommonmark"]
+email = ["mail-parser"]
 fileobjects = ["python-magic", "pydeep", "lief"]
 openioc = ["beautifulsoup4"]
 pdfexport = ["reportlab"]
@@ -1234,7 +1235,7 @@ virustotal = ["validators"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "23aa8f0499f0012761ac2f91c02c2ad02a3a4fb53dd57bdcdca5db2b32b54634"
+content-hash = "dc046a32aca97b89566cce465977e52a94176d6155798bf19bc719938ba67e76"
 
 [metadata.files]
 alabaster = [
@@ -1422,8 +1423,8 @@ imagesize = [
     {file = "imagesize-1.2.0.tar.gz", hash = "sha256:b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"},
 ]
 importlib-metadata = [
-    {file = "importlib_metadata-3.0.0-py2.py3-none-any.whl", hash = "sha256:fc3b3f9697703d3833d2803162d60cbe8b9f57b5da5e6496ac81e3cb82bd8d9c"},
-    {file = "importlib_metadata-3.0.0.tar.gz", hash = "sha256:d582eb5c35b2f16c78e365e0f89e369f36af38fdaad0146208aa973c693ba247"},
+    {file = "importlib_metadata-3.1.0-py2.py3-none-any.whl", hash = "sha256:590690d61efdd716ff82c39ca9a9d4209252adfe288a4b5721181050acbd4175"},
+    {file = "importlib_metadata-3.1.0.tar.gz", hash = "sha256:d9b8a46a0885337627a6430db287176970fff18ad421becec1d64cfc763c2099"},
 ]
 ipaddress = [
     {file = "ipaddress-1.0.23-py2.py3-none-any.whl", hash = "sha256:6e0f4a39e66cb5bb9a137b00276a2eff74f93b71dcbdad6f10ff7df9d3557fcc"},

pymisp/tools/emailobject.py

@@ -7,8 +7,11 @@ from typing import Union, List, Tuple
 import email.utils
 import ipaddress
 import logging
-import mailparser  # type: ignore
-from mailparser.utils import msgconvert  # type: ignore
+try:
+    import mailparser  # type: ignore
+    from mailparser.utils import msgconvert  # type: ignore
+except ImportError:
+    mailparser = None
 from ..exceptions import InvalidMISPObject
 from .abstractgenerator import AbstractMISPObjectGenerator
 
@@ -25,6 +28,10 @@ class MISPMailObjectOutlookException(InvalidMISPObject):
     pass
 
 
+if not mailparser:
+    raise MISPMailObjectOutlookException('mail-parser is required to use this module, you can install it by running pip3 install pymisp[email]')
+
+
 class EMailObject(AbstractMISPObjectGenerator):
     def __init__(self, filepath: Union[Path, str] = None, pseudofile: BytesIO = None,
                  attach_original_email: bool = True, **kwargs):

pyproject.toml

@@ -46,7 +46,7 @@ requests = "^2.22.0"
 python-dateutil = "^2.8.1"
 jsonschema = "^3.2.0"
 deprecated = "^1.2.7"
-mail-parser = {version = "3.12.0"}
+mail-parser = {version = "^3.12.0", optional = true}
 python-magic = {version = "^0.4.15", optional = true}
 pydeep = {version = "^0.4", optional = true}
 lief = {version = "^0.10.1", optional = true}
@@ -64,6 +64,7 @@ virustotal = ['validators']
 docs = ['sphinx-autodoc-typehints', 'recommonmark']
 pdfexport = ['reportlab']
 url = ['pyfaup']
+email = ['mail-parser']
 
 [tool.poetry.dev-dependencies]
 nose = "^1.3.7"