Your IP : 18.227.105.110
3
nf�\�* � @ s d Z ddlmZ ddlZddlZddlZddlmZ ddlm Z m
Z
m Z m Z m
Z
mZ ddlmZ ddlmZ dd lmZ dd
lmZ d d lmZ ydd
lmZ W n ek
r� dZY nX ej e �Z G dd� de
�Z G dd� de �Z G dd� de�Z!ej"Z"ej#Z#ej$Z$ej%Z%ej&Z&dS )aC
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.
� )�absolute_importN� )�urljoin)� HTTPError� HTTPWarning�
MaxRetryError�
ProtocolError� TimeoutError�SSLError)�RequestMethods)� HTTPResponse)�Timeout)�Retry� )�_appengine_environ)�urlfetchc @ s e Zd ZdS )�AppEnginePlatformWarningN)�__name__�
__module__� __qualname__� r r � /usr/lib/python3.6/appengine.pyr G s r c @ s e Zd ZdS )�AppEnginePlatformErrorN)r r r r r r r r K s r c @ sX e Zd ZdZddd�Zdd� Zdd � Zddddejfd
d �Z d d
� Z
dd� Z dd� Z dS )�AppEngineManagera
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.
NTc C sN t s td��t� rtd��tjdt� tj| |� || _|| _ |pFt
j | _ d S )Nz.URLFetch is not available in this environment.z�Use normal urllib3.PoolManager instead of AppEngineManageron Managed VMs, as using URLFetch is not necessary in this environment.z�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.)
r r �is_prod_appengine_mvms�warnings�warnr r �__init__�validate_certificate�urlfetch_retriesr ZDEFAULT�retries)�self�headersr r r r r r r c s zAppEngineManager.__init__c C s | S )Nr )r! r r r � __enter__{ s zAppEngineManager.__enter__c C s dS )NFr )r! �exc_typeZexc_valZexc_tbr r r �__exit__~ s zAppEngineManager.__exit__c K s� | j ||�}yF|o |jdko |j} tj||||p2i d| jo<| | j|�| jd�}
W �nB tjk
r� } zt | | ��W Y d d } ~ X �n tj
k
r� } z$dt | �kr�t d| ��t
| ��W Y d d } ~ X n� tjk
�r } z(dt | �kr�t| || d��t
| ��W Y d d } ~ X n� tjk
�r6 } zt d| ��W Y d d } ~ X n` tjk
�rb } zt| ��W Y d d } ~ X n4 tjk
�r� } zt d | | ��W Y d d } ~ X nX | j|
fd
|i|��} |�o�| j� }
|
�rr| j�r�|j�r�t| |d ��n�| jd k�r�d
}y|j||| | d�}W n* tk
�r. |j�r*t| |d ��| S X |j| � tjd||
� t ||
�}| j ||||f|||d�|��S t | j d��}|j || j|��r�|j||| | d�}tjd|� |j!| � | j ||f|||||d�|��S | S )Nr F)Zpayload�methodr" Zallow_truncated�follow_redirectsZdeadliner z too largezOURLFetch request too large, URLFetch only supports requests up to 10mb in size.zToo many redirects)�reasonzPURLFetch response too large, URLFetch only supportsresponses up to 32mb in size.z$URLFetch does not support method: %sr ztoo many redirectsi/ ZGET)�responseZ_poolzRedirecting %s -> %s)r �redirect�timeoutz Retry-Afterz Retry: %s)�bodyr" r r* r+ )"� _get_retriesr* �totalr Zfetchr �_get_absolute_timeoutr ZDeadlineExceededErrorr ZInvalidURLError�strr r Z
DownloadErrorr ZResponseTooLargeErrorZSSLCertificateErrorr
ZInvalidMethodError�#_urlfetch_response_to_http_responseZget_redirect_locationZraise_on_redirect�statusZ incrementZsleep_for_retry�log�debugr �urlopen�boolZ getheaderZis_retryZsleep)r! r& Zurlr, r" r r* r+ � response_kwr' r) �eZ
http_responseZredirect_locationZ redirect_urlZhas_retry_afterr r r r5 � s�
zAppEngineManager.urlopenc K s� t � r"|jjd�}|dkr"|jd= |jjd�}|dkrZ|jd�}|jd� dj|�|jd< tf tj|j �|j
|j|j d�|��}tf tj|j �|j|j |d�|��S )Nzcontent-encodingZdeflateztransfer-encodingZchunked�,)r, �msgr" r2 )r, r" r2 �original_response) �is_prod_appenginer" �get�split�remove�joinr �io�BytesIOZcontentZ
header_msgZ status_code)r! Z
urlfetch_respr7 Zcontent_encodingZtransfer_encodingZ encodingsr; r r r r1 � s*
z4AppEngineManager._urlfetch_response_to_http_responsec C sB |t jkrd S t|t �r>|jd k s,|jd k r8tjdt� |jS |S )NzdURLFetch does not support granular timeout settings, reverting to total or default URLFetch timeout.) r
�DEFAULT_TIMEOUT�
isinstanceZ_readZ_connectr r r r. )r! r+ r r r r/ s
z&AppEngineManager._get_absolute_timeoutc C s> t |t�s tj||| jd�}|js.|js.|jr:tjdt � |S )N)r* �defaultzhURLFetch only supports total retries and does not recognize connect, read, or redirect retry parameters.)
rD r Zfrom_intr Zconnect�readr* r r r )r! r r* r r r r-
s
z AppEngineManager._get_retries)NNTT)
r r r �__doc__r r# r% r
rC r5 r1 r/ r- r r r r r O s
Z$ r )'rG Z
__future__r rA Zloggingr Z packages.six.moves.urllib.parser �
exceptionsr r r r r r
Zrequestr r) r Z util.timeoutr
Z
util.retryr � r Zgoogle.appengine.apir � ImportErrorZ getLoggerr r3 r r r Z is_appengineZis_appengine_sandboxZis_local_appenginer< r r r r r �<module>' s2
O