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o ;jGZ � @ s, d Z ddlZddlZddlZddlmZ ddlm Z ddl m Z ddl Z ddlmZ ddlZddlmZ ddlmZ dd lmZ dd lmZ G d d � d e�ZG d d� de�ZG dd� de�Z dd� Z G dd� de�Z G dd� de �Z dZ dd� Z!dddddddddddd � Z"d d � Z#d#d d �Z$d#d!d"�Z%dS )$aA Exception classes for CherryPy. CherryPy provides (and uses) exceptions for declaring that the HTTP response should be a status other than the default "200 OK". You can ``raise`` them like normal Python exceptions. You can also call them and they will raise themselves; this means you can set an :class:`HTTPError<cherrypy._cperror.HTTPError>` or :class:`HTTPRedirect<cherrypy._cperror.HTTPRedirect>` as the :attr:`request.handler<cherrypy._cprequest.Request.handler>`. .. _redirectingpost: Redirecting POST ================ When you GET a resource and are redirected by the server to another Location, there's generally no problem since GET is both a "safe method" (there should be no side-effects) and an "idempotent method" (multiple calls are no different than a single call). POST, however, is neither safe nor idempotent--if you charge a credit card, you don't want to be charged twice by a redirect! For this reason, *none* of the 3xx responses permit a user-agent (browser) to resubmit a POST on redirection without first confirming the action with the user: ===== ================================= =========== 300 Multiple Choices Confirm with the user 301 Moved Permanently Confirm with the user 302 Found (Object moved temporarily) Confirm with the user 303 See Other GET the new URI; no confirmation 304 Not modified for conditional GET only; POST should not raise this error 305 Use Proxy Confirm with the user 307 Temporary Redirect Confirm with the user 308 Permanent Redirect No confirmation ===== ================================= =========== However, browsers have historically implemented these restrictions poorly; in particular, many browsers do not force the user to confirm 301, 302 or 307 when redirecting POST. For this reason, CherryPy defaults to 303, which most user-agents appear to have implemented correctly. Therefore, if you raise HTTPRedirect for a POST request, the user-agent will most likely attempt to GET the new URI (without asking for confirmation from the user). We realize this is confusing for developers, but it's the safest thing we could do. You are of course free to raise ``HTTPRedirect(uri, status=302)`` or any other 3xx status if you know what you're doing, but given the environment, we couldn't let any of those be the default. Custom Error Handling ===================== .. image:: /refman/cperrors.gif Anticipated HTTP responses -------------------------- The 'error_page' config namespace can be used to provide custom HTML output for expected responses (like 404 Not Found). Supply a filename from which the output will be read. The contents will be interpolated with the values %(status)s, %(message)s, %(traceback)s, and %(version)s using plain old Python `string formatting <http://docs.python.org/2/library/stdtypes.html#string-formatting-operations>`_. :: _cp_config = { 'error_page.404': os.path.join(localDir, "static/index.html") } Beginning in version 3.1, you may also provide a function or other callable as an error_page entry. It will be passed the same status, message, traceback and version arguments that are interpolated into templates:: def error_page_402(status, message, traceback, version): return "Error %s - Well, I'm very sorry but you haven't paid!" % status cherrypy.config.update({'error_page.402': error_page_402}) Also in 3.1, in addition to the numbered error codes, you may also supply "error_page.default" to handle all codes which do not have their own error_page entry. Unanticipated errors -------------------- CherryPy also has a generic error handling mechanism: whenever an unanticipated error occurs in your code, it will call :func:`Request.error_response<cherrypy._cprequest.Request.error_response>` to set the response status, headers, and body. By default, this is the same output as :class:`HTTPError(500) <cherrypy._cperror.HTTPError>`. If you want to provide some other behavior, you generally replace "request.error_response". Here is some sample code that shows how to display a custom error message and send an e-mail containing the error:: from cherrypy import _cperror def handle_error(): cherrypy.response.status = 500 cherrypy.response.body = [ "<html><body>Sorry, an error occurred</body></html>" ] sendMail('error@domain.com', 'Error in your web app', _cperror.format_exc()) @cherrypy.config(**{'request.error_response': handle_error}) class Root: pass Note that you have to explicitly set :attr:`response.body <cherrypy._cprequest.Response.body>` and not simply return an error message as a result. � N)�exc_info)�format_exception)�saxutils)�always_iterable)�ntob)�tonative)� classproperty)�httputilc @ s e Zd ZdZdS )�CherryPyExceptionz%A base class for CherryPy exceptions.N)�__name__� __module__� __qualname__�__doc__� r r �E/opt/saltstack/salt/lib/python3.10/site-packages/cherrypy/_cperror.pyr � s r c @ s e Zd ZdZddd�ZdS )�InternalRedirecta3 Exception raised to switch to the handler for a different URL. This exception will redirect processing to another path within the site (without informing the client). Provide the new path as an argument when raising the exception. Provide any params in the querystring for the new URL. � c C sV t jj| _|| _d|v r|�dd�\}| _tj�| jj|�}|| _ t � | || j� d S )N�?� ) �cherrypy�serving�request� query_string�split�urllib�parse�urljoin� path_info�pathr �__init__)�selfr r r r r r � s zInternalRedirect.__init__N)r �r r r r r r r r r r � s r c @ sN e Zd ZdZdZ dZ ddd�Zedd� �Ze dd � �Z d d � Z d d � Z dS )� HTTPRedirecta� Exception raised when the request should be redirected. This exception will force a HTTP redirect to the URL or URL's you give it. The new URL must be passed as the first argument to the Exception, e.g., HTTPRedirect(newUrl). Multiple URLs are allowed in a list. If a URL is absolute, it will be used as-is. If it is relative, it is assumed to be relative to the current cherrypy.request.path_info. If one of the provided URL is a unicode object, it will be encoded using the default encoding or the one passed in parameter. There are multiple types of redirect, from which you can select via the ``status`` argument. If you do not provide a ``status`` arg, it defaults to 303 (or 302 if responding with HTTP/1.0). Examples:: raise cherrypy.HTTPRedirect("") raise cherrypy.HTTPRedirect("/abs/path", 307) raise cherrypy.HTTPRedirect(["path1", "path2?a=1&b=2"], 301) See :ref:`redirectingpost` for additional caveats. N�utf-8c sj � �fdd�t |�D � �_}|d urt|�n�j}d| kr'dks,td�� td��t��||� d S )Nc s* g | ]}t j�t�� t|� p�j���qS r )r r r r �urlr �encoding)�.0r$ �r% r r r � <listcomp>� s ���z)HTTPRedirect.__init__.<locals>.<listcomp>�, i� z#status must be between 300 and 399.)r �urls�int�default_status� ValueErrorr r )r r* �statusr% Zabs_urlsr r' r r � s ����zHTTPRedirect.__init__c C s t jjjdkr dS dS )a The default redirect status for the request. RFC 2616 indicates a 301 response code fits our goal; however, browser support for 301 is quite messy. Use 302/303 instead. See http://www.alanflavell.org.uk/www/post-redirect.html )r r �/ �. )r r r �protocol)�clsr r r r, � s zHTTPRedirect.default_statusc C s | j dd� \}}|S )z%The integer HTTP status code to emit.N� )�args)r �_r. r r r r. � s zHTTPRedirect.statusc s t jj}| j |_}|dv rFd|jd< | jd |jd< ddddd d d�| � � d 7 � � fd d �| jD �}td�|�d�|_|j� dd� dS |dkrddD ] }||jv rW|j|= qLd|_|j� dd� dS |dkrt| jd d�|jd< d|_|j� dd� dS t d| ��)z�Modify cherrypy.response status, headers, and body to represent self. CherryPy uses this internally, but you can also use it to create an HTTPRedirect object and set its output without *raising* the exception. )r) i- r0 r/ i3 i4 �text/html;charset=utf-8� Content-Typer �Locationz This resource can be found at z'This resource has permanently moved to z%This resource resides temporarily at z'This resource has moved temporarily to z This resource has been moved to z<a href=%s>%s</a>.c s( g | ]}� t �|�tj|d d�f �qS )F��quote)r Z quoteattr�html�escape)r& �u��msgr r r( s ��z-HTTPRedirect.set_response.<locals>.<listcomp>z<br /> r# �Content-LengthNi0 ) ZAllow�Content-EncodingzContent-Languager@ �Content-Location� Content-MD5� Content-Ranger7 �Expires� Last-Modifiedi1 z The %s status code is unknown.) r r �responser. �headersr* r �join�body�popr- )r rG r. Zmsgs�keyr r> r � set_response� s@ �� � � zHTTPRedirect.set_responsec C � | ��z5Use this exception as a request.handler (raise self).r �r r r r �__call__5 � zHTTPRedirect.__call__)NN) r r r r r* r% r r r, �propertyr. rM rQ r r r r r" � s Ar" c C sH t jj}|j}dD ] }||v r||= q | dkr d|v r"|d= dS dS dS )z?Remove any headers which should not apply to an error response.) z Accept-RangesZAgeZETagr8 z Retry-AfterZVaryrA r@ rE rB rC rF i� rD N)r r rG rH )r. rG Z respheadersrL r r r � clean_headers: s � �rT c @ sX e Zd ZdZdZ dZ dZ ddd�Zdd� Zdd � Z d d � Z e e j dd d���ZdS )� HTTPErrora� Exception used to return an HTTP error code (4xx-5xx) to the client. This exception can be used to automatically send a response using a http status code, with an appropriate error page. It takes an optional ``status`` argument (which must be between 400 and 599); it defaults to 500 ("Internal Server Error"). It also takes an optional ``message`` argument, which will be returned in the response body. See `RFC2616 <http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4>`_ for a complete list of available error codes and when to use them. Examples:: raise cherrypy.HTTPError(403) raise cherrypy.HTTPError( "403 Forbidden", "You are not allowed to access this resource.") N�� c C s~ || _ z t�|�\| _| _}W n ty" | �dt� d jd ��w | jdk s-| jdkr1td��|p4|| _ t � | ||� d S )NrV r r � iW z#status must be between 400 and 599.) r. � _httputil� valid_status�code�reasonr- � __class__� _exc_infor4 �_messager r )r r. �messageZ defaultmsgr r r r p s � zHTTPError.__init__c C sd t jj}t| j� | j|_d}t jjjrt� }|j � dd� | j | j|| j d�}||_ t| j� dS )z�Modify cherrypy.response status, headers, and body to represent self. CherryPy uses this internally, but you can also use it to create an HTTPError object and set its output without *raising* the exception. Nr@ )� tracebackr_ )r r rG rT rZ r. r Zshow_tracebacks� format_excrH rK �get_error_pager^ rJ �_be_ie_unfriendly)r rG �tb�contentr r r rM s �zHTTPError.set_responsec O s t |i |��S �N)rb )r r4 �kwargsr r r rb � s zHTTPError.get_error_pagec C rN rO r rP r r r rQ � rR zHTTPError.__call__r c c s: � zdV W dS |y } z | ||pt |���d}~ww )z&Translate exception into an HTTPError.N)�str)r2 � exceptionr. r_ �excr r r �handle� s � ��zHTTPError.handle)rV N)rV r )r r r r r. rZ r[ r rM rb rQ � classmethod� contextlib�contextmanagerrk r r r r rU R s rU c @ s e Zd ZdZddd�ZdS )�NotFoundz�Exception raised when a URL could not be mapped to any handler (404). This is equivalent to raising :class:`HTTPError("404 Not Found") <cherrypy._cperror.HTTPError>`. Nc C s: |d u rt jj}|j|j }|f| _t�| dd| � d S )N� z The path '%s' was not found.)r r r � script_namer r4 rU r )r r r r r r r � s zNotFound.__init__rf r! r r r r ro � s ro a� <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></meta> <title>%(status)s</title> <style type="text/css"> #powered_by { margin-top: 20px; border-top: 2px solid black; font-style: italic; } #traceback { color: red; } </style> </head> <body> <h2>%(status)s</h2> <p>%(message)s</p> <pre id="traceback">%(traceback)s</pre> <div id="powered_by"> <span> Powered by <a href="http://www.cherrypy.dev">CherryPy %(version)s</a> </span> </div> </body> </html> c K s z t �| �\}}}W n ty t�dt� d jd ��w |�d�du r-d||f |d< |�d�du r8||d< |�d�du rCd |d< |�d �du rOtj|d < |� � D ]\}}|du r`d ||< qSt j || d d �||< qStj j j}|�|�pz|�d �}t} |r�zVt|d�r�|di |��} tj�| �r�ddlm} | | �W S t| t�r�| �d�W S t| t�s�tdt| �j ��| W S tj |d d�� } | � � } W d � n1 s�w Y W n$ t y� t t� � d } |d }|r�|d7 }|d| 7 }||d< Y nw tj j }d|j!d< | | } | �d�S )z�Return an HTML page, containing a pretty error response. status should be an int or a str. kwargs will be interpolated into the page template. rV r r r. Nz%s %sr_ r` r �versionFr9 �defaultrQ )�UTF8StreamEncoderr# zaerror page function did not return a bytestring, str or an iterator - returned object of type %s.)�newline���z<br />z3In addition, the custom error page failed: <br />%sr6 r7 r )"rX rY r- r rU r] r4 �get� __version__�itemsr; r< r r � error_page�_HTTPErrorTemplate�hasattr�libZ is_iteratorZcherrypy.lib.encodingrt � isinstancerh �encode�bytes�typer �io�open�read� Exception�_format_exceptionrG rH )r. rg rZ r[ r_ �k�vZpagesrz �template�resultrt �f�e�mrG r r r rb � sh � �� �� � rb i � ) rW i� rp i� i� i� i� i� rV i� i� c C sl t jj}t�| d�}|r4|d7 }|�� }t|�}|r&||k r&|d|| }||_tt|��|j d< d S d S )Nr r � r@ ) r r rG �_ie_friendly_error_sizesrw Z collapse_body�lenrJ rh rH )r. rG �sre �content_lengthr r r rc , s �rc c C s@ z | du rt � } | dkrW ~ dS ddl}d�|j| � �W ~ S ~ w )z0Return exc (or sys.exc_info if None), formatted.N)NNNr r )r] r` rI r )rj r` r r r ra C s �ra c C sN d}| durt | t�s| �d�} |d| 7 }dddttt|��d�fg|gfS ) a� Produce status, headers, body for a critical error. Returns a triple without calling any other questionable functions, so it should be as error-free as possible. Call it from an HTTP server if you get errors outside of the request. If extrabody is None, a friendly but rather unhelpful error message is set in the body. If extrabody is a string, it will be appended as-is to the body. s" Unrecoverable error in the server.Nr# � s 500 Internal Server Error)s Content-Types text/plains Content-Lengthz ISO-8859-1)r~ r� r r rh r� )Z extrabodyrJ r r r � bare_errorP s ��r� rf )&r r� rm � urllib.parser �sysr r] r` r r� Zxml.saxr r; Zmore_itertoolsr r Zcherrypy._cpcompatr r Zcherrypy._helperr Z cherrypy.libr rX r� r r r" rT rU ro r{ rb r� rc ra r� r r r r �<module> s< x Y!K�
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