Files
GoogleDriveManagement/src/gam/transport.py
ejochman e1660aa909 Refactor into Python package format (#1165)
* Refactor into a python module format

-Updates import statements to be absolute vs implicitly relative
-Uses import syntax that minimizes the need to update references in code
and/or reformat affected lines (e.g. `import gapi.directory` becomes `from gam.gapi import directory as
gapi_directory`)
-Adds a `__main__.py` such that the module can be executed on its own
using standard `python3 -m gam` syntax
-Replaces __main__ import hack with module import
-Updates the GAM path to be the module's parent dir

* Add gam.py to /src for backwards compatibility

A stub that calls gam.__main__.main() to be used by users who are not
with the syntax of calling a module implementation. It should also
provide immediate backwards-compatibility with existing scripts with
references to this file.

* Move build tools back to the main dir and out of the package

* Fix pylint errors

* Update build spec to use new package format

Incorporates @jay0lee's patch from
https://github.com/jay0lee/GAM/pull/1165#issuecomment-618430828
2020-04-23 14:06:30 -04:00

104 lines
3.2 KiB
Python

"""Methods related to network transport."""
import google_auth_httplib2
import httplib2
from gam.var import GAM_INFO
from gam.var import GC_CA_FILE
from gam.var import GC_TLS_MAX_VERSION
from gam.var import GC_TLS_MIN_VERSION
from gam.var import GC_Values
def create_http(cache=None,
timeout=None,
override_min_tls=None,
override_max_tls=None):
"""Creates a uniform HTTP transport object.
Args:
cache: The HTTP cache to use.
timeout: The cache timeout, in seconds.
override_min_tls: The minimum TLS version to require. If not provided, the
default is used.
override_max_tls: The maximum TLS version to require. If not provided, the
default is used.
Returns:
httplib2.Http with the specified options.
"""
tls_minimum_version = override_min_tls if override_min_tls else GC_Values.get(
GC_TLS_MIN_VERSION)
tls_maximum_version = override_max_tls if override_max_tls else GC_Values.get(
GC_TLS_MAX_VERSION)
httpObj = httplib2.Http(
ca_certs=GC_Values.get(GC_CA_FILE),
tls_maximum_version=tls_maximum_version,
tls_minimum_version=tls_minimum_version,
cache=cache,
timeout=timeout)
httpObj.redirect_codes = set(httpObj.redirect_codes) - {308}
return httpObj
def create_request(http=None):
"""Creates a uniform Request object with a default http, if not provided.
Args:
http: Optional httplib2.Http compatible object to be used with the request.
If not provided, a default HTTP will be used.
Returns:
Request: A google_auth_httplib2.Request compatible Request.
"""
if not http:
http = create_http()
return Request(http)
GAM_USER_AGENT = GAM_INFO
def _force_user_agent(user_agent):
"""Creates a decorator which can force a user agent in HTTP headers."""
def decorator(request_method):
"""Wraps a request method to insert a user-agent in HTTP headers."""
def wrapped_request_method(*args, **kwargs):
"""Modifies HTTP headers to include a specified user-agent."""
if kwargs.get('headers') is not None:
if kwargs['headers'].get('user-agent'):
if user_agent not in kwargs['headers']['user-agent']:
# Save the existing user-agent header and tack on our own.
kwargs['headers']['user-agent'] = (
f'{user_agent} '
f'{kwargs["headers"]["user-agent"]}')
else:
kwargs['headers']['user-agent'] = user_agent
else:
kwargs['headers'] = {'user-agent': user_agent}
return request_method(*args, **kwargs)
return wrapped_request_method
return decorator
class Request(google_auth_httplib2.Request):
"""A Request which forces a user agent."""
@_force_user_agent(GAM_USER_AGENT)
def __call__(self, *args, **kwargs):
"""Inserts the GAM user-agent header in requests."""
return super(Request, self).__call__(*args, **kwargs)
class AuthorizedHttp(google_auth_httplib2.AuthorizedHttp):
"""An AuthorizedHttp which forces a user agent during requests."""
@_force_user_agent(GAM_USER_AGENT)
def request(self, *args, **kwargs):
"""Inserts the GAM user-agent header in requests."""
return super(AuthorizedHttp, self).request(*args, **kwargs)