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Diffstat (limited to 'lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/contrib/appengine.py')
| -rw-r--r-- | lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/contrib/appengine.py | 296 |
1 files changed, 0 insertions, 296 deletions
diff --git a/lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/contrib/appengine.py b/lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/contrib/appengine.py deleted file mode 100644 index 814b0222..00000000 --- a/lib/python2.7/site-packages/requests-2.13.0-py2.7.egg/requests/packages/urllib3/contrib/appengine.py +++ /dev/null @@ -1,296 +0,0 @@ -""" -This module provides a pool manager that uses Google App Engine's -`URLFetch Service <https://cloud.google.com/appengine/docs/python/urlfetch>`_. - -Example usage:: - - from urllib3 import PoolManager - from urllib3.contrib.appengine import AppEngineManager, is_appengine_sandbox - - if is_appengine_sandbox(): - # AppEngineManager uses AppEngine's URLFetch API behind the scenes - http = AppEngineManager() - else: - # PoolManager uses a socket-level API behind the scenes - http = PoolManager() - - r = http.request('GET', 'https://google.com/') - -There are `limitations <https://cloud.google.com/appengine/docs/python/\ -urlfetch/#Python_Quotas_and_limits>`_ to the URLFetch service and it may not be -the best choice for your application. There are three options for using -urllib3 on Google App Engine: - -1. You can use :class:`AppEngineManager` with URLFetch. URLFetch is - cost-effective in many circumstances as long as your usage is within the - limitations. -2. You can use a normal :class:`~urllib3.PoolManager` by enabling sockets. - Sockets also have `limitations and restrictions - <https://cloud.google.com/appengine/docs/python/sockets/\ - #limitations-and-restrictions>`_ and have a lower free quota than URLFetch. - To use sockets, be sure to specify the following in your ``app.yaml``:: - - env_variables: - GAE_USE_SOCKETS_HTTPLIB : 'true' - -3. If you are using `App Engine Flexible -<https://cloud.google.com/appengine/docs/flexible/>`_, you can use the standard -:class:`PoolManager` without any configuration or special environment variables. -""" - -from __future__ import absolute_import -import logging -import os -import warnings -from ..packages.six.moves.urllib.parse import urljoin - -from ..exceptions import ( - HTTPError, - HTTPWarning, - MaxRetryError, - ProtocolError, - TimeoutError, - SSLError -) - -from ..packages.six import BytesIO -from ..request import RequestMethods -from ..response import HTTPResponse -from ..util.timeout import Timeout -from ..util.retry import Retry - -try: - from google.appengine.api import urlfetch -except ImportError: - urlfetch = None - - -log = logging.getLogger(__name__) - - -class AppEnginePlatformWarning(HTTPWarning): - pass - - -class AppEnginePlatformError(HTTPError): - pass - - -class AppEngineManager(RequestMethods): - """ - Connection manager for Google App Engine sandbox applications. - - This manager uses the URLFetch service directly instead of using the - emulated httplib, and is subject to URLFetch limitations as described in - the App Engine documentation `here - <https://cloud.google.com/appengine/docs/python/urlfetch>`_. - - Notably it will raise an :class:`AppEnginePlatformError` if: - * URLFetch is not available. - * If you attempt to use this on App Engine Flexible, as full socket - support is available. - * If a request size is more than 10 megabytes. - * If a response size is more than 32 megabtyes. - * If you use an unsupported request method such as OPTIONS. - - Beyond those cases, it will raise normal urllib3 errors. - """ - - def __init__(self, headers=None, retries=None, validate_certificate=True, - urlfetch_retries=True): - if not urlfetch: - raise AppEnginePlatformError( - "URLFetch is not available in this environment.") - - if is_prod_appengine_mvms(): - raise AppEnginePlatformError( - "Use normal urllib3.PoolManager instead of AppEngineManager" - "on Managed VMs, as using URLFetch is not necessary in " - "this environment.") - - warnings.warn( - "urllib3 is using URLFetch on Google App Engine sandbox instead " - "of sockets. To use sockets directly instead of URLFetch see " - "https://urllib3.readthedocs.io/en/latest/reference/urllib3.contrib.html.", - AppEnginePlatformWarning) - - RequestMethods.__init__(self, headers) - self.validate_certificate = validate_certificate - self.urlfetch_retries = urlfetch_retries - - self.retries = retries or Retry.DEFAULT - - def __enter__(self): - return self - - def __exit__(self, exc_type, exc_val, exc_tb): - # Return False to re-raise any potential exceptions - return False - - def urlopen(self, method, url, body=None, headers=None, - retries=None, redirect=True, timeout=Timeout.DEFAULT_TIMEOUT, - **response_kw): - - retries = self._get_retries(retries, redirect) - - try: - follow_redirects = ( - redirect and - retries.redirect != 0 and - retries.total) - response = urlfetch.fetch( - url, - payload=body, - method=method, - headers=headers or {}, - allow_truncated=False, - follow_redirects=self.urlfetch_retries and follow_redirects, - deadline=self._get_absolute_timeout(timeout), - validate_certificate=self.validate_certificate, - ) - except urlfetch.DeadlineExceededError as e: - raise TimeoutError(self, e) - - except urlfetch.InvalidURLError as e: - if 'too large' in str(e): - raise AppEnginePlatformError( - "URLFetch request too large, URLFetch only " - "supports requests up to 10mb in size.", e) - raise ProtocolError(e) - - except urlfetch.DownloadError as e: - if 'Too many redirects' in str(e): - raise MaxRetryError(self, url, reason=e) - raise ProtocolError(e) - - except urlfetch.ResponseTooLargeError as e: - raise AppEnginePlatformError( - "URLFetch response too large, URLFetch only supports" - "responses up to 32mb in size.", e) - - except urlfetch.SSLCertificateError as e: - raise SSLError(e) - - except urlfetch.InvalidMethodError as e: - raise AppEnginePlatformError( - "URLFetch does not support method: %s" % method, e) - - http_response = self._urlfetch_response_to_http_response( - response, retries=retries, **response_kw) - - # Handle redirect? - redirect_location = redirect and http_response.get_redirect_location() - if redirect_location: - # Check for redirect response - if (self.urlfetch_retries and retries.raise_on_redirect): - raise MaxRetryError(self, url, "too many redirects") - else: - if http_response.status == 303: - method = 'GET' - - try: - retries = retries.increment(method, url, response=http_response, _pool=self) - except MaxRetryError: - if retries.raise_on_redirect: - raise MaxRetryError(self, url, "too many redirects") - return http_response - - retries.sleep_for_retry(http_response) - log.debug("Redirecting %s -> %s", url, redirect_location) - redirect_url = urljoin(url, redirect_location) - return self.urlopen( - method, redirect_url, body, headers, - retries=retries, redirect=redirect, - timeout=timeout, **response_kw) - - # Check if we should retry the HTTP response. - has_retry_after = bool(http_response.getheader('Retry-After')) - if retries.is_retry(method, http_response.status, has_retry_after): - retries = retries.increment( - method, url, response=http_response, _pool=self) - log.debug("Retry: %s", url) - retries.sleep(http_response) - return self.urlopen( - method, url, - body=body, headers=headers, - retries=retries, redirect=redirect, - timeout=timeout, **response_kw) - - return http_response - - def _urlfetch_response_to_http_response(self, urlfetch_resp, **response_kw): - - if is_prod_appengine(): - # Production GAE handles deflate encoding automatically, but does - # not remove the encoding header. - content_encoding = urlfetch_resp.headers.get('content-encoding') - - if content_encoding == 'deflate': - del urlfetch_resp.headers['content-encoding'] - - transfer_encoding = urlfetch_resp.headers.get('transfer-encoding') - # We have a full response's content, - # so let's make sure we don't report ourselves as chunked data. - if transfer_encoding == 'chunked': - encodings = transfer_encoding.split(",") - encodings.remove('chunked') - urlfetch_resp.headers['transfer-encoding'] = ','.join(encodings) - - return HTTPResponse( - # In order for decoding to work, we must present the content as - # a file-like object. - body=BytesIO(urlfetch_resp.content), - headers=urlfetch_resp.headers, - status=urlfetch_resp.status_code, - **response_kw - ) - - def _get_absolute_timeout(self, timeout): - if timeout is Timeout.DEFAULT_TIMEOUT: - return None # Defer to URLFetch's default. - if isinstance(timeout, Timeout): - if timeout._read is not None or timeout._connect is not None: - warnings.warn( - "URLFetch does not support granular timeout settings, " - "reverting to total or default URLFetch timeout.", - AppEnginePlatformWarning) - return timeout.total - return timeout - - def _get_retries(self, retries, redirect): - if not isinstance(retries, Retry): - retries = Retry.from_int( - retries, redirect=redirect, default=self.retries) - - if retries.connect or retries.read or retries.redirect: - warnings.warn( - "URLFetch only supports total retries and does not " - "recognize connect, read, or redirect retry parameters.", - AppEnginePlatformWarning) - - return retries - - -def is_appengine(): - return (is_local_appengine() or - is_prod_appengine() or - is_prod_appengine_mvms()) - - -def is_appengine_sandbox(): - return is_appengine() and not is_prod_appengine_mvms() - - -def is_local_appengine(): - return ('APPENGINE_RUNTIME' in os.environ and - 'Development/' in os.environ['SERVER_SOFTWARE']) - - -def is_prod_appengine(): - return ('APPENGINE_RUNTIME' in os.environ and - 'Google App Engine/' in os.environ['SERVER_SOFTWARE'] and - not is_prod_appengine_mvms()) - - -def is_prod_appengine_mvms(): - return os.environ.get('GAE_VM', False) == 'true' |