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eC d$ � ZF e- eC d* � ZG e< dk jH eB e= eE dl � e= eF dm � eG � � q�We2 jI � n d S)na� An NNTP client class based on:
- RFC 977: Network News Transfer Protocol
- RFC 2980: Common NNTP Extensions
- RFC 3977: Network News Transfer Protocol (version 2)
Example:
>>> from nntplib import NNTP
>>> s = NNTP('news')
>>> resp, count, first, last, name = s.group('comp.lang.python')
>>> print('Group', name, 'has', count, 'articles, range', first, 'to', last)
Group comp.lang.python has 51 articles, range 5770 to 5821
>>> resp, subs = s.xhdr('subject', '{0}-{1}'.format(first, last))
>>> resp = s.quit()
>>>
Here 'resp' is the server response line.
Error responses are turned into exceptions.
To post an article from a file:
>>> f = open(filename, 'rb') # file containing article, including header
>>> resp = s.post(f)
>>>
For descriptions of all methods, read the comments in the code below.
Note that all arguments and return values representing article numbers
are strings, not numbers, since they are rarely used for calculations.
� NFT)�
decode_header)�_GLOBAL_DEFAULT_TIMEOUT�NNTP� NNTPError�NNTPReplyError�NNTPTemporaryError�NNTPPermanentError�NNTPProtocolError�
NNTPDataErrorr i c @ s" e Z d Z d Z d d � Z d S)r z%Base class for all nntplib exceptionsc G sC t j | | � y | d | _ Wn t k
r> d | _ Yn Xd S)Nr zNo response given)� Exception�__init__�response�
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__module__� __qualname__�__doc__r r r r r r ` s c @ s e Z d Z d Z d S)r zUnexpected [123]xx replyN)r r r r r r r r r i s c @ s e Z d Z d Z d S)r z
4xx errorsN)r r r r r r r r r m s c @ s e Z d Z d Z d S)r z
5xx errorsN)r r r r r r r r r q s c @ s e Z d Z d Z d S)r z"Response does not begin with [1-5]N)r r r r r r r r r u s c @ s e Z d Z d Z d S)r
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y s �w i3 Z100Z101�211�215Z220Z221Z222Z224Z225Z230Z231Z282�subject�from�datez
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message_idc C sk g } xU t | � D]G \ } } t | t � rM | j | j | pC d � � q | j | � q Wd j | � S)zwTakes an unicode string representing a munged header value
and decodes it as a (possibly non-ASCII) readable value.�ascii� )�_email_decode_header�
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header_str�parts�v�encr r r r � s c C s� g } x� | D]� } | d d k rR | d d � j d � \ } } } d | } n | j d � \ } } } | j � } t j | | � } | j | � q
Wt } t | � t | � k r� t d � � n | d t | � � | k r� t d � � n | S)z�Parse a list of string representing the response to LIST OVERVIEW.FMT
and return a list of header/metadata names.
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| | | <qS W| j | | f � q W| S)zZParse the response to an OVER or XOVER command according to the
overview format `fmt`.� r/ z: Nz?OVER/XOVER response doesn't include names of additional headers) r6 r5 �split�int� enumerate�
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� � } t | d d � � } | d k r� | d 7} n | d k r� | d 7} n t j | | | | | | � S)z�Parse a pair of (date, time) strings, and return a datetime object.
If only the date is given, it is assumed to be date and time
concatenated together (e.g. response to the DATE command).
N� � � �F i� �d il i����i�������rL ���rM )r? �datetime)�date_str�time_strZhoursZminutesZseconds�yearZmonthZdayr r r �_parse_datetime� s
rR c C st t | t j � s d } n d j | � } | j } | rX | d } d j | | � } n d j | | � } | | f S)aP Format a date or datetime object as a pair of (date, time) strings
in the format required by the NEWNEWS and NEWGROUPS commands. If a
date object is passed, the time is assumed to be midnight (00h00).
The returned representation depends on the legacy flag:
* if legacy is False (the default):
date has the YYYYMMDD format and time the HHMMSS format
* if legacy is True:
date has the YYMMDD format and time the HHMMSS format.
RFC 3977 compliant servers should understand both formats; therefore,
legacy is only needed when talking to old servers.
Z000000z({0.hour:02d}{0.minute:02d}{0.second:02d}rK z {0:02d}{1.month:02d}{1.day:02d}z {0:04d}{1.month:02d}{1.day:02d})r( rN �formatrQ )ZdtZlegacyrP �yrO r r r �_unparse_datetime� s
rU c C s. | d k r t j � } n | j | d | �S)z�Wrap a socket in SSL/TLS. Arguments:
- sock: Socket to wrap
- context: SSL context to use for the encrypted connection
Returns:
- sock: New, encrypted socket.
NZserver_hostname)�sslZ_create_stdlib_contextZ wrap_socket)�sock�contextZhostnamer r r � _encrypt_on s rY c @ s� e Z d Z d Z d Z d e d d � Z d d � Z d d � Z d
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d d � Z d d d � Z d d � Z d d d � Z d d � Z d d d � Z d d d � Z d! d" � Z d# d$ � Z d% d& � Z d' d d( d) � Z d' d d* d+ � Z d d' d d, d- �Z d. d/ � Z d0 d1 � Z d2 d3 � Z d4 d5 � Z d' d d6 d7 � Z d8 d9 � Z d: d; � Z! d d< d= � Z" d> d? � Z# d@ dA � Z$ d dB dC � Z% d d' d dD dE �Z& d d' d dF dG �Z' d d' d dH dI �Z( dJ dK � Z) d' d dL dM � Z* d' d dN dO � Z+ d' d dP dQ � Z, d' d dR dS � Z- dT dU � Z. dV dW � Z/ dX dY � Z0 dZ d[ � Z1 d\ d] � Z2 d^ d_ � Z3 d` da � Z4 d d d db dc � Z5 dd de � Z6 e7 r�d df dg � Z8 n d S)h� _NNTPBasezutf-8�surrogateescapeNc C s� | | _ | | _ d | _ | j � | _ d | _ | j � d | _ | r� d | j k r� | j � | j s� d | _ | j � q� n d | _ d | _
d S)aS Initialize an instance. Arguments:
- file: file-like object (open for read/write in binary mode)
- host: hostname of the server
- readermode: if true, send 'mode reader' command after
connecting.
- timeout: timeout (in seconds) used for socket connections
readermode is sometimes necessary if you are connecting to an
NNTP server on the local machine and intend to call
reader-specific commands, such as `group'. If you get
unexpected NNTPPermanentErrors, you might need to set
readermode.
r NF�READER) �host�file� debugging�_getresp�welcome�_caps�getcapabilities�readermode_afterauth�_setreadermode�tls_on�
authenticated)r r^ r] �
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z_NNTPBase.__init__c C s | S)Nr )r r r r � __enter__g s z_NNTPBase.__enter__c si � f d d � } | � re z- y � j � Wn t t f k
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t � d � S)Nr^ )�hasattrr )r r r �<lambda>k s z$_NNTPBase.__exit__.<locals>.<lambda>)�quit�OSError�EOFError�_close)r r Z is_connectedr )r r �__exit__j s z_NNTPBase.__exit__c C s) | j r" t d t | j � � n | j S)z�Get the welcome message from the server
(this is read and squirreled away by __init__()).
If the response code is 200, posting is allowed;
if it 201, posting is not allowed.z *welcome*)r_ �print�reprra )r r r r �
getwelcomeu s z_NNTPBase.getwelcomec
C s� | j d k r� d | _ d | _ y | j � \ } } Wn! t t f k
rZ i | _ Yq� X| | _ d | k r� t t t | d � � | _ n d | k r� d j | d � | _ q� n | j S)z�Get the server capabilities, as read by __init__().
If the CAPABILITIES command is not supported, an empty dict is
returned.Nr0 �VERSIONZIMPLEMENTATION� )
rb � nntp_versionZnntp_implementation� capabilitiesr r �max�mapr? r+ )r �resp�capsr r r rc ~ s z_NNTPBase.getcapabilitiesc C s
| | _ d S)z�Set the debugging level. Argument 'level' means:
0: no debugging output (default)
1: print commands and responses but not body text etc.
2: also print raw lines read and sent before stripping CR/LFN)r_ )r �levelr r r �set_debuglevel� s z_NNTPBase.set_debuglevelc C sP | t } | j d k r/ t d t | � � n | j j | � | j j � d S)zfInternal: send one line to the server, appending CRLF.
The `line` must be a bytes-like object.r0 z*put*N)�_CRLFr_ rr rs r^ �write�flush)r r8 r r r �_putline� s
z_NNTPBase._putlinec C sH | j r t d t | � � n | j | j | j � } | j | � d S)zlInternal: send one command to the server (through _putline()).
The `line` must be an unicode string.z*cmd*N)r_ rr rs �encode�encoding�errorsr� )r r8 r r r �_putcmd� s z_NNTPBase._putcmdTc C s� | j j t d � } t | � t k r7 t d � � n | j d k r\ t d t | � � n | sk t � n | r� | d d � t k r� | d d � } q� | d d � t k r� | d d � } q� n | S)
z�Internal: return one line from the server, stripping _CRLF.
Raise EOFError if the connection is closed.
Returns a bytes object.r0 z
line too longz*get*rH NrM rM ���r� )
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strip_crlfr8 r r r �_getline� s z_NNTPBase._getlinec C s� | j � } | j r+ t d t | � � n | j | j | j � } | d d � } | d k rn t | � � n | d k r� t | � � n | d k r� t | � � n | S)z�Internal: get a response from the server.
Raise various errors if the response indicates an error.
Returns an unicode string.z*resp*Nr0 �4�5Z123)
r� r_ rr rs r* r� r� r r r )r r{ �cr r r r` � s z_NNTPBase._getrespc
C sY d } z2t | t t f � r4 t | d � } } n | j � } | d d � t k re t | � � n g } | d k r� d t d f } x� | j d � } | | k r� Pn | j d � r� | d d � } n | j
| � q� WnX d } xO | j � } | | k rPn | j d � r&| d d � } n | j | � q� WWd | rN| j � n X| | f S) aQ Internal: get a response plus following text from the server.
Raise various errors if the response indicates an error.
Returns a (response, lines) tuple where `response` is an unicode
string and `lines` is a list of bytes objects.
If `file` is a file-like object, it must be open in binary mode.
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r( �strr �openr` � _LONGRESPr r r� rA r� r) �close)r r^ Z
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terminatorr r r � _getlongresp� s8 z_NNTPBase._getlongrespc C s | j | � | j � S)zWInternal: send a command and get the response.
Same return value as _getresp().)r� r` )r r8 r r r � _shortcmd� s
z_NNTPBase._shortcmdc C s | j | � | j | � S)zoInternal: send a command and get the response plus following text.
Same return value as _getlongresp().)r� r� )r r8 r^ r r r �_longcmd s
z_NNTPBase._longcmdc s? � j | � � j | � \ } } | � f d d � | D� f S)z�Internal: send a command and get the response plus following text.
Same as _longcmd() and _getlongresp(), except that the returned `lines`
are unicode strings rather than bytes objects.
c s( g | ] } | j � j � j � � q Sr )r* r� r� )�.0r8 )r r r �
<listcomp> s z,_NNTPBase._longcmdstring.<locals>.<listcomp>)r� r� )r r8 r^ r{ �listr )r r �_longcmdstring s
z_NNTPBase._longcmdstringc C sw y | j SWn t k
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Xt | � } | | _ | S)zqInternal: get the overview format. Queries the server if not
already done, else returns the cached value.zLIST OVERVIEW.FMTN)Z_cachedoverviewfmt�AttributeErrorr� r r5 r< )r r{ r r7 r r r �_getoverviewfmt s
z_NNTPBase._getoverviewfmtc C s d d � | D� S)Nc S s" g | ] } t | j � � � q Sr )r r> )r� r8 r r r r� $ s z(_NNTPBase._grouplist.<locals>.<listcomp>r )r r r r r �
_grouplist" s z_NNTPBase._grouplistc C sR i } | j d � \ } } x* | D]" } | j � ^ } } | | | <q" W| | f S)a! Process a CAPABILITIES command. Not supported by all servers.
Return:
- resp: server response if successful
- caps: a dictionary mapping capability names to lists of tokens
(for example {'VERSION': ['2'], 'OVER': [], LIST: ['ACTIVE', 'HEADERS'] })
Z CAPABILITIES)r� r> )r r| r{ r r8 r9 rB r r r rx & s
z_NNTPBase.capabilitiesr^ c C s� t | t j t j f � s9 t d j | j j � � � n t | | j d k � \ } } d j | | � } | j | | � \ } } | | j
| � f S)z�Process a NEWGROUPS command. Arguments:
- date: a date or datetime object
Return:
- resp: server response if successful
- list: list of newsgroup names
zAthe date parameter must be a date or datetime object, not '{:40}'rH zNEWGROUPS {0} {1}) r( rN r � TypeErrorrS � __class__r rU rw r� r� )r r r^ rO rP �cmdr{ r r r r � newgroups4 s z_NNTPBase.newgroupsc C s| t | t j t j f � s9 t d j | j j � � � n t | | j d k � \ } } d j | | | � } | j | | � S)z�Process a NEWNEWS command. Arguments:
- group: group name or '*'
- date: a date or datetime object
Return:
- resp: server response if successful
- list: list of message ids
zAthe date parameter must be a date or datetime object, not '{:40}'rH zNEWNEWS {0} {1} {2})
r( rN r r� rS r� r rU rw r� )r r r r^ rO rP r� r r r �newnewsD s z_NNTPBase.newnewsc C sJ | d k r d | } n d } | j | | � \ } } | | j | � f S)a@ Process a LIST or LIST ACTIVE command. Arguments:
- group_pattern: a pattern indicating which groups to query
- file: Filename string or file object to store the result in
Returns:
- resp: server response if successful
- list: list of (group, last, first, flag) (strings)
Nz LIST ACTIVE ZLIST)r� r� )r �
group_patternr^ �commandr{ r r r r r� T s
z_NNTPBase.listc C s� t j d � } | j d | � \ } } | j d � sS | j d | � \ } } n i } xX | D]P } | j | j � � } | r` | j d d � \ } }
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| | <q` q` W| r� | | f Sd Sd S)Nz ^(?P<group>[^ ]+)[ ]+(.*)$zLIST NEWSGROUPS r zXGTITLE r0 rH r& )�re�compiler� rA �search�stripr ) r r� Z
return_all�line_patr{ r �groups�raw_line�matchr9 Zdescr r r �_getdescriptionsc s
z_NNTPBase._getdescriptionsc C s | j | d � S)a� Get a description for a single group. If more than one
group matches ('group' is a pattern), return the first. If no
group matches, return an empty string.
This elides the response code from the server, since it can
only be '215' or '285' (for xgtitle) anyway. If the response
code is needed, use the 'descriptions' method.
NOTE: This neither checks for a wildcard in 'group' nor does
it check whether the group actually exists.F)r� )r r r r r � descriptionz s z_NNTPBase.descriptionc C s | j | d � S)z'Get descriptions for a range of groups.T)r� )r r� r r r � descriptions� s z_NNTPBase.descriptionsc C s� | j d | � } | j d � s1 t | � � n | j � } d } } } t | � } | d k r� | d } | d k r� | d } | d k r� | d } | d k r� | d j � } q� q� q� n | t | � t | � t | � | f S)a Process a GROUP command. Argument:
- group: the group name
Returns:
- resp: server response if successful
- count: number of articles
- first: first article number
- last: last article number
- name: the group name
zGROUP r r r0 rH r� rI )r� rA r r> r6 r2 r? )r r9 r{ �words�countr" r! �nr r r r � s
z_NNTPBase.groupc C s | j d | � S)a Process a HELP command. Argument:
- file: Filename string or file object to store the result in
Returns:
- resp: server response if successful
- list: list of strings returned by the server in response to the
HELP command
ZHELP)r� )r r^ r r r �help� s z_NNTPBase.helpc C sQ | j d � s t | � � n | j � } t | d � } | d } | | | f S)z_Internal: parse the response line of a STAT, NEXT, LAST,
ARTICLE, HEAD or BODY command.Z22r0 rH )rA r r> r? )r r{ r� �art_numr$ r r r �
_statparse� s
z_NNTPBase._statparsec C s | j | � } | j | � S)z/Internal: process a STAT, NEXT or LAST command.)r� r� )r r8 r{ r r r �_statcmd� s z_NNTPBase._statcmdc C s- | r | j d j | � � S| j d � Sd S)a( Process a STAT command. Argument:
- message_spec: article number or message id (if not specified,
the current article is selected)
Returns:
- resp: server response if successful
- art_num: the article number
- message_id: the message id
zSTAT {0}ZSTATN)r� rS )r � message_specr r r �stat� s z_NNTPBase.statc C s
| j d � S)z;Process a NEXT command. No arguments. Return as for STAT.�NEXT)r� )r r r r �next� s z_NNTPBase.nextc C s
| j d � S)z;Process a LAST command. No arguments. Return as for STAT.ZLAST)r� )r r r r r! � s z_NNTPBase.lastc C sF | j | | � \ } } | j | � \ } } } | t | | | � f S)z2Internal: process a HEAD, BODY or ARTICLE command.)r� r� r# )r r8 r^ r{ r r� r$ r r r �_artcmd� s z_NNTPBase._artcmdc C s4 | d k r d j | � } n d } | j | | � S)a0 Process a HEAD command. Argument:
- message_spec: article number or message id
- file: filename string or file object to store the headers in
Returns:
- resp: server response if successful
- ArticleInfo: (article number, message id, list of header lines)
NzHEAD {0}ZHEAD)rS r� )r r� r^ r� r r r �head� s z_NNTPBase.headc C s4 | d k r d j | � } n d } | j | | � S)a+ Process a BODY command. Argument:
- message_spec: article number or message id
- file: filename string or file object to store the body in
Returns:
- resp: server response if successful
- ArticleInfo: (article number, message id, list of body lines)
NzBODY {0}ZBODY)rS r� )r r� r^ r� r r r �body� s z_NNTPBase.bodyc C s4 | d k r d j | � } n d } | j | | � S)a5 Process an ARTICLE command. Argument:
- message_spec: article number or message id
- file: filename string or file object to store the article in
Returns:
- resp: server response if successful
- ArticleInfo: (article number, message id, list of article lines)
Nz ARTICLE {0}ZARTICLE)rS r� )r r� r^ r� r r r �article� s z_NNTPBase.articlec C s
| j d � S)zYProcess a SLAVE command. Returns:
- resp: server response if successful
ZSLAVE)r� )r r r r �slave s z_NNTPBase.slavec sb t j d � � | j d j | | � | � \ } } � f d d � � | � f d d � | D� f S)ai Process an XHDR command (optional server extension). Arguments:
- hdr: the header type (e.g. 'subject')
- str: an article nr, a message id, or a range nr1-nr2
- file: Filename string or file object to store the result in
Returns:
- resp: server response if successful
- list: list of (nr, value) strings
z^([0-9]+) ?(.*)
?z XHDR {0} {1}c s) � j | � } | r% | j d d � S| S)Nr0 rH )r� r )r8 �m)�patr r �
remove_number s z%_NNTPBase.xhdr.<locals>.remove_numberc s g | ] } � | � � q Sr r )r� r8 )r� r r r� s z"_NNTPBase.xhdr.<locals>.<listcomp>)r� r� r� rS )r Zhdrr� r^ r{ r r )r� r� r �xhdr
s $z_NNTPBase.xhdrc C sC | j d j | | � | � \ } } | j � } | t | | � f S)aF Process an XOVER command (optional server extension) Arguments:
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- end: end of range
- file: Filename string or file object to store the result in
Returns:
- resp: server response if successful
- list: list of dicts containing the response fields
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XOVER {0}-{1})r� rS r� rF )r �start�endr^ r{ r r7 r r r �xover s z_NNTPBase.xoverc C s� d | j k r d n d } t | t t f � r[ | \ } } | d j | | pQ d � 7} n | d k rx | d | } n | j | | � \ } } | j � } | t | | � f S)a� Process an OVER command. If the command isn't supported, fall
back to XOVER. Arguments:
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information about
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if end is None, information up to the newest message will be
retrieved
- or None, indicating the current article number must be used
- file: Filename string or file object to store the result in
Returns:
- resp: server response if successful
- list: list of dicts containing the response fields
NOTE: the "message id" form isn't supported by XOVER
ZOVERZXOVERz {0}-{1}r& Nrv )rb r( �tupler� rS r� r� rF ) r r� r^ r� r� r� r{ r r7 r r r �over( s z_NNTPBase.overc C s� t j d t d � t j d � } | j d | | � \ } } g } xE | D]= } | j | j � � } | rK | j | j d d � � qK qK W| | f S)z�Process an XGTITLE command (optional server extension) Arguments:
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r t | � � Yn X| | f Sd S)z�Process an XPATH command (optional server extension) Arguments:
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z_NNTPBase.xpathc C s� | j d � } | j d � s- t | � � n | j � } t | � d k rZ t | � � n | d } t | � d k r� t | � � n | t | d � f S)z�Process the DATE command.
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Note that if the server refuses the article an exception is raised.z IHAVE {0})r� rS )r r$ r� r r r �ihave� s z_NNTPBase.ihavec C s | j j � | ` d S)N)r^ r� )r r r r rp � s
z_NNTPBase._closec
C s% z | j d � } Wd | j � X| S)zdProcess a QUIT command and close the socket. Returns:
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NzAlready logged in.z7At least one of `user` and `usenetrc` must be specifiedr rH zauthinfo user Z381zauthinfo pass Z281r\ )rg r� �netrcZauthenticatorsr] rn r� rA r r rb rc rd re )r �user�password�usenetrcr� Z credentialsZauthr{ r r r �login� s<
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d � � d S) zzProcess a STARTTLS command. Arguments:
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rZ c @ s: e Z d Z e d d d d e d d � Z d d � Z d S)r NFc C s� | | _ | | _ t j | | f | � | _ d } yQ | j j d � } t j | | | | | � | sm | r� | j | | | � n Wn+ | r� | j � n | j j � � Yn Xd S)a, Initialize an instance. Arguments:
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r� �__main__r� zJ nntplib built-in demo - display the latest articles in a newsgroupz-gz--group�defaultzgmane.comp.python.generalr� z3group to fetch messages from (default: %(default)s)z-sz--serverznews.gmane.orgz+NNTP server hostname (default: %(default)s)z-pz--portr0 �typez#NNTP port number (default: %s / %s)z-nz
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