0x1949 Team - FAZEMRX - MANAGER
Edit File: server.cpython-310.pyc
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In all cases, the implementation is intentionally naive -- all requests are executed synchronously. SECURITY WARNING: DON'T USE THIS CODE UNLESS YOU ARE INSIDE A FIREWALL -- it may execute arbitrary Python code or external programs. Note that status code 200 is sent prior to execution of a CGI script, so scripts cannot send other status codes such as 302 (redirect). XXX To do: - log requests even later (to capture byte count) - log user-agent header and other interesting goodies - send error log to separate file z0.6)� HTTPServer�ThreadingHTTPServer�BaseHTTPRequestHandler�SimpleHTTPRequestHandler�CGIHTTPRequestHandler� N)� HTTPStatusa� <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> <title>Error response</title> </head> <body> <h1>Error response</h1> <p>Error code: %(code)d</p> <p>Message: %(message)s.</p> <p>Error code explanation: %(code)s - %(explain)s.</p> </body> </html> ztext/html;charset=utf-8c @ s e Zd ZdZdd� ZdS )r � c C s4 t j�| � | jdd� \}}t�|�| _|| _dS )z.Override server_bind to store the server name.N� )� socketserver� TCPServer� server_bind�server_address�socket�getfqdn� server_name� server_port)�self�host�port� r �"/usr/lib/python3.10/http/server.pyr � s zHTTPServer.server_bindN)�__name__� __module__� __qualname__�allow_reuse_addressr r r r r r � s r c @ s e Zd ZdZdS )r TN)r r r �daemon_threadsr r r r r � s r c @ s* e Zd ZdZdej�� d Zde Z e Z e Z dZdd� Zdd � Zd d � Zd d � Zd5dd�Zd6dd�Zd6dd�Zdd� Zdd� Zdd� Zd7d d �Zd d � Ze� d d!� e � e d"�e d#d$��D ��Z d%e e!d&�< d'd(� Z"d)d*� Z#d6d+d,�Z$d-d.� Z%g d/�Z&g d0�Z'd1d2� Z(d3Z)e*j+j,Z-d4d!� e.j/�0� D �Z1dS )8r a� HTTP request handler base class. The following explanation of HTTP serves to guide you through the code as well as to expose any misunderstandings I may have about HTTP (so you don't need to read the code to figure out I'm wrong :-). HTTP (HyperText Transfer Protocol) is an extensible protocol on top of a reliable stream transport (e.g. TCP/IP). The protocol recognizes three parts to a request: 1. One line identifying the request type and path 2. An optional set of RFC-822-style headers 3. An optional data part The headers and data are separated by a blank line. The first line of the request has the form <command> <path> <version> where <command> is a (case-sensitive) keyword such as GET or POST, <path> is a string containing path information for the request, and <version> should be the string "HTTP/1.0" or "HTTP/1.1". <path> is encoded using the URL encoding scheme (using %xx to signify the ASCII character with hex code xx). The specification specifies that lines are separated by CRLF but for compatibility with the widest range of clients recommends servers also handle LF. Similarly, whitespace in the request line is treated sensibly (allowing multiple spaces between components and allowing trailing whitespace). Similarly, for output, lines ought to be separated by CRLF pairs but most clients grok LF characters just fine. If the first line of the request has the form <command> <path> (i.e. <version> is left out) then this is assumed to be an HTTP 0.9 request; this form has no optional headers and data part and the reply consists of just the data. The reply form of the HTTP 1.x protocol again has three parts: 1. One line giving the response code 2. An optional set of RFC-822-style headers 3. The data Again, the headers and data are separated by a blank line. The response code line has the form <version> <responsecode> <responsestring> where <version> is the protocol version ("HTTP/1.0" or "HTTP/1.1"), <responsecode> is a 3-digit response code indicating success or failure of the request, and <responsestring> is an optional human-readable string explaining what the response code means. This server parses the request and the headers, and then calls a function specific to the request type (<command>). Specifically, a request SPAM will be handled by a method do_SPAM(). If no such method exists the server sends an error response to the client. If it exists, it is called with no arguments: do_SPAM() Note that the request name is case sensitive (i.e. SPAM and spam are different requests). The various request details are stored in instance variables: - client_address is the client IP address in the form (host, port); - command, path and version are the broken-down request line; - headers is an instance of email.message.Message (or a derived class) containing the header information; - rfile is a file object open for reading positioned at the start of the optional input data part; - wfile is a file object open for writing. IT IS IMPORTANT TO ADHERE TO THE PROTOCOL FOR WRITING! The first thing to be written must be the response line. Then follow 0 or more header lines, then a blank line, and then the actual data (if any). The meaning of the header lines depends on the command executed by the server; in most cases, when data is returned, there should be at least one header line of the form Content-type: <type>/<subtype> where <type> and <subtype> should be registered MIME types, e.g. "text/html" or "text/plain". zPython/r z BaseHTTP/�HTTP/0.9c C s� d| _ | j | _}d| _t| jd�}|�d�}|| _|�� }t |�dkr&dS t |�dkr�|d }z*|� d �s8t �|�d d �d }|�d �}t |�d krMt �t |d �t |d �f}W n t t fyo | �tjd| � Y dS w |dkr|| jdkr|d| _|dkr�| �tjd| � dS || _d t |� kr�dks�n | �tjd| � dS |dd � \}}t |�d kr�d| _|dkr�| �tjd| � dS ||| _ | _| j� d�r�d | j�d � | _z tjj| j| jd�| _W n? tjj�y } z| �tj dt|�� W Y d}~dS d}~w tjj �y( } z| �tj dt|�� W Y d}~dS d}~ww | j� dd�} | � � d k�r;d| _n| � � d k�rK| jdk�rKd| _| j� d d�} | � � d k�rl| jdk�rl| jdk�rl| � � �sldS dS ) aH Parse a request (internal). The request should be stored in self.raw_requestline; the results are in self.command, self.path, self.request_version and self.headers. Return True for success, False for failure; on failure, any relevant error response has already been sent back. NTz iso-8859-1z r F� ���zHTTP/�/r �.r zBad request version (%r))r r zHTTP/1.1)r r zInvalid HTTP version (%s)zBad request syntax (%r)�GETz Bad HTTP/0.9 request type (%r)z//)�_classz Line too longzToo many headers� Connection� �close� keep-alive�Expectz 100-continue)!�command�default_request_version�request_version�close_connection�str�raw_requestline�rstrip� requestline�split�len� startswith� ValueError�int� IndexError� send_errorr � BAD_REQUEST�protocol_version�HTTP_VERSION_NOT_SUPPORTED�path�lstrip�http�client� parse_headers�rfile� MessageClass�headers� LineTooLong� REQUEST_HEADER_FIELDS_TOO_LARGE� HTTPException�get�lower�handle_expect_100) r �versionr/ �words�base_version_number�version_numberr( r: �err�conntype�expectr r r � parse_request s� ���� � ������ z$BaseHTTPRequestHandler.parse_requestc C s | � tj� | �� dS )a7 Decide what to do with an "Expect: 100-continue" header. If the client is expecting a 100 Continue response, we must respond with either a 100 Continue or a final response before waiting for the request body. The default is to always respond with a 100 Continue. You can behave differently (for example, reject unauthorized requests) by overriding this method. This method should either return True (possibly after sending a 100 Continue response) or send an error response and return False. T)�send_response_onlyr �CONTINUE� end_headers�r r r r rG v s z(BaseHTTPRequestHandler.handle_expect_100c C s� zW| j �d�| _t| j�dkr!d| _d| _d| _| �tj � W dS | js*d| _ W dS | � � s1W dS d| j }t | |�sH| �tj d| j � W dS t| |�}|� | j�� W dS tys } z| �d|� d| _ W Y d}~dS d}~ww ) z�Handle a single HTTP request. You normally don't need to override this method; see the class __doc__ string for information on how to handle specific HTTP commands such as GET and POST. i i r$ NT�do_zUnsupported method (%r)zRequest timed out: %r)r? �readliner- r1 r/ r* r( r6 r �REQUEST_URI_TOO_LONGr+ rO �hasattr�NOT_IMPLEMENTED�getattr�wfile�flush� TimeoutError� log_error)r �mname�method�er r r �handle_one_request� s: � ��z)BaseHTTPRequestHandler.handle_one_requestc C s* d| _ | �� | j s| �� | j r dS dS )z&Handle multiple requests if necessary.TN)r+ ra rS r r r �handle� s �z BaseHTTPRequestHandler.handleNc C s z | j | \}}W n ty d\}}Y nw |du r |}|du r#|}| �d||� | �||� | �dd� d}|dkrp|tjtjtjfvrp| j |t j |dd�t j |dd�d � }|� d d �}| �d | j � | �d tt|��� | �� | jdkr�|r�| j�|� dS dS dS )ak Send and log an error reply. Arguments are * code: an HTTP error code 3 digits * message: a simple optional 1 line reason phrase. *( HTAB / SP / VCHAR / %x80-FF ) defaults to short entry matching the response code * explain: a detailed message defaults to the long entry matching the response code. This sends an error response (so it must be called before any output has been generated), logs the error, and finally sends a piece of HTML explaining the error to the user. )�???rc Nzcode %d, message %sr# r% �� F��quote)�code�message�explainzUTF-8�replacez Content-Type�Content-Length�HEAD)� responses�KeyErrorr] � send_response� send_headerr � NO_CONTENT� RESET_CONTENT� NOT_MODIFIED�error_message_format�html�escape�encode�error_content_typer, r1 rR r( rZ �write)r rg rh ri �shortmsg�longmsg�body�contentr r r r6 � s< � � � �z!BaseHTTPRequestHandler.send_errorc C s: | � |� | �||� | �d| �� � | �d| �� � dS )z�Add the response header to the headers buffer and log the response code. Also send two standard headers with the server software version and the current date. �Server�DateN)� log_requestrP rp �version_string�date_time_string�r rg rh r r r ro � s z$BaseHTTPRequestHandler.send_responsec C sh | j dkr2|du r|| jv r| j| d }nd}t| d�s g | _| j�d| j||f �dd�� dS dS ) z Send the response header only.r Nr r$ �_headers_bufferz %s %d %s �latin-1�strict)r* rm rW r� �appendr8 rw r� r r r rP � s ����z)BaseHTTPRequestHandler.send_response_onlyc C sv | j dkrt| d�s g | _| j�d||f �dd�� |�� dkr7|�� dkr,d| _d S |�� d kr9d | _d S d S d S ) z)Send a MIME header to the headers buffer.r r� z%s: %s r� r� � connectionr% Tr& FN)r* rW r� r� rw rF r+ )r �keyword�valuer r r rp s � �z"BaseHTTPRequestHandler.send_headerc C s& | j dkr| j�d� | �� dS dS )z,Send the blank line ending the MIME headers.r s N)r* r� r� � flush_headersrS r r r rR s �z"BaseHTTPRequestHandler.end_headersc C s, t | d�r| j�d�| j�� g | _d S d S )Nr� � )rW rZ ry �joinr� rS r r r r� s �z$BaseHTTPRequestHandler.flush_headers�-c C s. t |t�r|j}| �d| jt|�t|�� dS )zNLog an accepted request. This is called by send_response(). z "%s" %s %sN)� isinstancer r� � log_messager/ r, )r rg �sizer r r r� s �z"BaseHTTPRequestHandler.log_requestc G s | j |g|�R � dS )z�Log an error. This is called when a request cannot be fulfilled. By default it passes the message on to log_message(). Arguments are the same as for log_message(). XXX This should go to the separate error log. N)r� )r �format�argsr r r r] ) s z BaseHTTPRequestHandler.log_errorc C s i | ] }|d |d���qS )z\x�02xr )�.0�cr r r � <dictcomp>9 s z!BaseHTTPRequestHandler.<dictcomp>� � � z\\�\c G s2 || }t j�d| �� | �� |�| j�f � dS )aZ Log an arbitrary message. This is used by all other logging functions. Override it if you have specific logging wishes. The first argument, FORMAT, is a format string for the message to be logged. If the format string contains any % escapes requiring parameters, they should be specified as subsequent arguments (it's just like printf!). The client ip and current date/time are prefixed to every message. Unicode control characters are replaced with escaped hex before writing the output to stderr. z%s - - [%s] %s N)�sys�stderrry �address_string�log_date_time_string� translate�_control_char_table)r r� r� rh r r r r� < s � �z"BaseHTTPRequestHandler.log_messagec C s | j d | j S )z*Return the server software version string.� )�server_version� sys_versionrS r r r r� V s z%BaseHTTPRequestHandler.version_stringc C s |du rt � � }tjj|dd�S )z@Return the current date and time formatted for a message header.NT)�usegmt)�time�email�utils� formatdate)r � timestampr r r r� Z s z'BaseHTTPRequestHandler.date_time_stringc C sB t � � }t �|�\ }}}}}}}} } d|| j| ||||f } | S )z.Return the current time formatted for logging.z %02d/%3s/%04d %02d:%02d:%02d)r� � localtime� monthname) r �now�year�month�day�hh�mm�ss�x�y�z�sr r r r� ` s �z+BaseHTTPRequestHandler.log_date_time_string)�Mon�Tue�Wed�Thu�Fri�Sat�Sun) N�Jan�Feb�Mar�Apr�May�Jun�Jul�Aug�Sep�Oct�Nov�Decc C s | j d S )zReturn the client address.r )�client_addressrS r r r r� n s z%BaseHTTPRequestHandler.address_string�HTTP/1.0c C s i | ] }||j |jf�qS r )�phrase� description)r� �vr r r r� } s ��)NN�N)r� r� )2r r r �__doc__r� rH r0 r� � __version__r� �DEFAULT_ERROR_MESSAGErt �DEFAULT_ERROR_CONTENT_TYPErx r) rO rG ra rb r6 ro rP rp rR r� r� r] r, � maketrans� itertools�chain�ranger� �ordr� r� r� r� � weekdaynamer� r� r8 r< r= � HTTPMessager@ r � __members__�valuesrm r r r r r � sF gj% 5 � �r c sx e Zd ZdZde Zddddd� ZZdd �� fd d � Zd d � Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Z� ZS )r aW Simple HTTP request handler with GET and HEAD commands. This serves files from the current directory and any of its subdirectories. The MIME type for files is determined by calling the .guess_type() method. The GET and HEAD requests are identical except that the HEAD request omits the actual contents of the file. z SimpleHTTP/zapplication/gzip�application/octet-streamzapplication/x-bzip2zapplication/x-xz)z.gzz.Zz.bz2z.xzN�� directoryc s2 |d u rt �� }t �|�| _t� j|i |�� d S r� )�os�getcwd�fspathr� �super�__init__)r r� r� �kwargs�� __class__r r r� � s z!SimpleHTTPRequestHandler.__init__c C s8 | � � }|rz| �|| j� W |�� dS |�� w dS )zServe a GET request.N)� send_head�copyfilerZ r% �r �fr r r �do_GET� s �z SimpleHTTPRequestHandler.do_GETc C s | � � }|r |�� dS dS )zServe a HEAD request.N)r� r% r� r r r �do_HEAD� s �z SimpleHTTPRequestHandler.do_HEADc C sL | � | j�}d}tj�|�rgtj�| j�}|j�d�sL| �t j � |d |d |d d |d |d f}tj� |�}| � d|� | � d d � | � � dS d D ]}tj�||�}tj�|�ra|} nqN| �|�S | �|�}|�d�rz| �t jd � dS zt|d �}W n ty� | �t jd � Y dS w z�t�|�� �}d| jv r�d| jvr�z tj�| jd �} W n t t t t fy� Y n:w | j du r�| j!t"j#j$d�} | j t"j#j$u r�t"j"�%|j&t"j#j$�} | j!dd�} | | kr�| �t j'� | � � |�(� W dS | �t j)� | � d|� | � d t*|d �� | � d| �+|j&�� | � � |W S |�(� � )a{ Common code for GET and HEAD commands. This sends the response code and MIME headers. Return value is either a file object (which has to be copied to the outputfile by the caller unless the command was HEAD, and must be closed by the caller under all circumstances), or None, in which case the caller has nothing further to do. Nr r r r r � �Locationrk �0)z index.htmlz index.htmzFile not found�rbzIf-Modified-Sincez If-None-Match)�tzinfo)� microsecond� Content-type� z Last-Modified),�translate_pathr: r� �isdir�urllib�parse�urlsplit�endswithro r �MOVED_PERMANENTLY� urlunsplitrp rR r� �isfile�list_directory� guess_typer6 � NOT_FOUND�open�OSError�fstat�filenorA r� r� �parsedate_to_datetime� TypeErrorr5 � OverflowErrorr3 r� rj �datetime�timezone�utc� fromtimestamp�st_mtimers r% �OKr, r� ) r r: r� �parts� new_parts�new_url�index�ctype�fs�ims� last_modifr r r r� � s� � � � �� � �z"SimpleHTTPRequestHandler.send_headc C s� zt �|�}W n ty | �tjd� Y dS w |jdd� d� g }z tjj | j dd�}W n t y> tj� | j �}Y nw t j |dd �}t�� }d | }|�d � |�d � |�d | � |�d| � |�d| � |�d� |D ]9}t j �||�}| } } t j �|�r�|d } |d } t j �|�r�|d } |�dtjj| dd�t j | dd �f � qt|�d� d�|��|d�} t�� } | �| � | �d� | �tj� | � dd| � | � dt t | ��� | � � | S )z�Helper to produce a directory listing (absent index.html). Return value is either a file object, or None (indicating an error). In either case, the headers are sent, making the interface the same as for send_head(). z No permission to list directoryNc S s | � � S r� )rF )�ar r r �<lambda> s z9SimpleHTTPRequestHandler.list_directory.<locals>.<lambda>)�key� surrogatepass��errorsFre zDirectory listing for %szZ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">z <html> <head>z@<meta http-equiv="Content-Type" content="text/html; charset=%s">z<title>%s</title> </head>z<body> <h1>%s</h1>z <hr> <ul>r �@z <li><a href="%s">%s</a></li>z</ul> <hr> </body> </html> � �surrogateescaper r� ztext/html; charset=%srk ) r� �listdirr r6 r r �sortr� r� �unquoter: �UnicodeDecodeErrorru rv r� �getfilesystemencodingr� r� r� �islinkrf rw �io�BytesIOry �seekro r rp r, r1 rR ) r r: �list�r� displaypath�enc�title�name�fullname� displayname�linkname�encodedr� r r r r sl �� � � � � �� z'SimpleHTTPRequestHandler.list_directoryc C s� |� dd�d }|� dd�d }|�� �d�}z tjj|dd�}W n ty0 tj�|�}Y nw t�|�}|� d�}t d|�}| j }|D ]}t j � |�sU|t jt jfv rVqEt j �||�}qE|rd|d7 }|S ) z�Translate a /-separated PATH to the local filename syntax. Components that mean special things to the local file system (e.g. drive or directory names) are ignored. (XXX They should probably be diagnosed.) �?r r �#r r r N)r0 r. r� r� r� r# r$ � posixpath�normpath�filterr� r� r: �dirname�curdir�pardirr� )r r: �trailing_slashrI �wordr r r r� ? s& � z'SimpleHTTPRequestHandler.translate_pathc C s t �||� dS )a� Copy all data between two file objects. The SOURCE argument is a file object open for reading (or anything with a read() method) and the DESTINATION argument is a file object open for writing (or anything with a write() method). The only reason for overriding this would be to change the block size or perhaps to replace newlines by CRLF -- note however that this the default server uses this to copy binary data as well. N)�shutil� copyfileobj)r �source� outputfiler r r r� ] s z!SimpleHTTPRequestHandler.copyfilec C sX t �|�\}}|| jv r| j| S |�� }|| jv r | j| S t�|�\}}|r*|S dS )a� Guess the type of a file. Argument is a PATH (a filename). Return value is a string of the form type/subtype, usable for a MIME Content-type header. The default implementation looks the file's extension up in the table self.extensions_map, using application/octet-stream as a default; however it would be permissible (if slow) to look inside the data to make a better guess. r� )r6 �splitext�extensions_maprF � mimetypesr )r r: �base�ext�guess�_r r r r m s z#SimpleHTTPRequestHandler.guess_type)r r r r� r� r� rC �_encodings_map_defaultr� r� r� r� r r� r� r � __classcell__r r r� r r � s � X: r c C s� | � d�\} }}tj�| �} | �d�}g }|dd� D ]}|dkr&|�� q|r1|dkr1|�|� q|rL|�� }|rK|dkrE|�� d}n |dkrKd}nd}|rWd�||f�}dd�|� |f}d�|�}|S )a� Given a URL path, remove extra '/'s and '.' path elements and collapse any '..' references and returns a collapsed path. Implements something akin to RFC-2396 5.2 step 6 to parse relative paths. The utility of this function is limited to is_cgi method and helps preventing some security attacks. Returns: The reconstituted URL, which will always start with a '/'. Raises: IndexError if too many '..' occur within the path. r4 r Nr z..r r$ )� partitionr� r� r# r0 �popr� r� ) r: rH �query� path_parts� head_parts�part� tail_part� splitpath�collapsed_pathr r r �_url_collapse_path� s2 �� rT c C sn t rt S zddl} W n ty Y dS w z | �d�d a W t S ty6 dtdd� | �� D �� a Y t S w ) z$Internal routine to get nobody's uidr Nr �nobodyr r c s s � | ]}|d V qdS )r Nr )r� r� r r r � <genexpr>� s � z nobody_uid.<locals>.<genexpr>)rU �pwd� ImportError�getpwnamrn �max�getpwall)rW r r r � nobody_uid� s � � �r\ c C s t �| t j�S )zTest for executable file.)r� �access�X_OK)r: r r r � executable� s r_ c @ sV e Zd ZdZeed�ZdZdd� Zdd� Z dd � Z d d gZ d d � Z dd� Z dd� ZdS )r z�Complete HTTP server with GET, HEAD and POST commands. GET and HEAD also support running CGI scripts. The POST command is *only* implemented for CGI scripts. �forkr c C s& | � � r | �� dS | �tjd� dS )zRServe a POST request. This is only implemented for CGI scripts. z Can only POST to CGI scriptsN)�is_cgi�run_cgir6 r rX rS r r r �do_POST� s �z CGIHTTPRequestHandler.do_POSTc C s | � � r| �� S t�| �S )z-Version of send_head that support CGI scripts)ra rb r r� rS r r r r� � s z CGIHTTPRequestHandler.send_headc C s� t | j�}|�dd�}|dkr-|d|� | jvr-|�d|d �}|dkr-|d|� | jvs|dkrG|d|� ||d d� }}||f| _dS dS )a3 Test whether self.path corresponds to a CGI script. Returns True and updates the cgi_info attribute to the tuple (dir, rest) if self.path requires running a CGI script. Returns False otherwise. If any exception is raised, the caller should assume that self.path was rejected as invalid and act accordingly. 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This runs an HTTP server on port 8000 (or the port argument). Nr r{ �[�]zServing HTTP on z port z (http://z/) ...z& Keyboard interrupt received, exiting.r ) r� �address_familyr8 r � getsockname�print� serve_forever�KeyboardInterruptr� �exit) � HandlerClass� ServerClass�protocolr �bind�addr�httpdr �url_hostr r r �test� s, ��� ��� "�r� �__main__z--cgi� store_truezrun as CGI server)�action�helpz--bindz-b�ADDRESSz8specify alternate bind address (default: all interfaces))�metavarr� z --directoryz-dz8specify alternate directory (default: current directory))�defaultr� r �storer4 z&specify alternate port (default: 8000))r� r� r� �nargsr� c s$ e Zd Z� fdd�Zdd� Z� ZS )�DualStackServerc sH t �t�� | j�tjtjd� W d � n1 sw Y t� �� S )Nr ) � contextlib�suppress� Exceptionr � setsockopt� IPPROTO_IPV6� IPV6_V6ONLYr� r rS r� r r r s � � zDualStackServer.server_bindc C s | j ||| tjd� d S )Nr� )�RequestHandlerClassr� r� )r r� r� r r r �finish_request s �z DualStackServer.finish_request)r r r r r� rJ r r r� r r� s r� )r� r� r r� )7r� r� �__all__r� r � email.utilsr� ru � http.clientr< r' r� rD r� r6 r� r> r r r� r� � urllib.parser� r r� r� r r �ThreadingMixInr �StreamRequestHandlerr r rT rU r\ r_ r r� r� r �argparser� �ArgumentParser�parser� add_argumentr� r4 � parse_argsr� �cgi� handler_classr� r r� r r r r �<module> s� R s 0 �� �� � ��