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18.12.1 NNTP Objects


18.12.1 NNTP Objects

NNTP instances have the following methods. The response that is returned as the first item in the return tuple of almost all methods is the server's response: a string beginning with a three-digit code. If the server's response indicates an error, the method raises one of the above exceptions.

getwelcome( )
Return the welcome message sent by the server in reply to the initial connection. (This message sometimes contains disclaimers or help information that may be relevant to the user.)

set_debuglevel( level)
Set the instance's debugging level. This controls the amount of debugging output printed. The default, 0, produces no debugging output. A value of 1 produces a moderate amount of debugging output, generally a single line per request or response. A value of 2 or higher produces the maximum amount of debugging output, logging each line sent and received on the connection (including message text).

newgroups( date, time, [file])
Send a "NEWGROUPS" command. The date argument should be a string of the form 'yymmdd' indicating the date, and time should be a string of the form 'hhmmss' indicating the time. Return a pair (response, groups) where groups is a list of group names that are new since the given date and time. If the file parameter is supplied, then the output of the "NEWGROUPS" command is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the command output. If file is supplied, then the returned list is an empty list.

newnews( group, date, time, [file])
Send a "NEWNEWS" command. Here, group is a group name or '*', and date and time have the same meaning as for newgroups(). Return a pair (response, articles) where articles is a list of message ids. If the file parameter is supplied, then the output of the "NEWNEWS" command is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the command output. If file is supplied, then the returned list is an empty list.

list( [file])
Send a "LIST" command. Return a pair (response, list) where list is a list of tuples. Each tuple has the form (group, last, first, flag), where group is a group name, last and first are the last and first article numbers (as strings), and flag is 'y' if posting is allowed, 'n' if not, and 'm' if the newsgroup is moderated. (Note the ordering: last, first.) If the file parameter is supplied, then the output of the "LIST" command is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the command output. If file is supplied, then the returned list is an empty list.

descriptions( grouppattern)
Send a "LIST NEWSGROUPS" command, where grouppattern is a wildmat string as specified in RFC2980 (it's essentially the same as DOS or UNIX shell wildcard strings). Return a pair (response, list), where list is a list of tuples containing (name, title).

New in version 2.4.

description( group)
Get a description for a single group group. If more than one group matches (if 'group' is a real wildmat string), return the first match. If no group matches, return an empty string.

This elides the response code from the server. If the response code is needed, use descriptions().

New in version 2.4.

group( name)
Send a "GROUP" command, where name is the group name. Return a tuple (response, count, first, last, name) where count is the (estimated) number of articles in the group, first is the first article number in the group, last is the last article number in the group, and name is the group name. The numbers are returned as strings.

help( [file])
Send a "HELP" command. Return a pair (response, list) where list is a list of help strings. If the file parameter is supplied, then the output of the "HELP" command is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the command output. If file is supplied, then the returned list is an empty list.

stat( id)
Send a "STAT" command, where id is the message id (enclosed in "<" and ">") or an article number (as a string). Return a triple (response, number, id) where number is the article number (as a string) and id is the message id (enclosed in "<" and ">").

next( )
Send a "NEXT" command. Return as for stat().

last( )
Send a "LAST" command. Return as for stat().

head( id)
Send a "HEAD" command, where id has the same meaning as for stat(). Return a tuple (response, number, id, list) where the first three are the same as for stat(), and list is a list of the article's headers (an uninterpreted list of lines, without trailing newlines).

body( id,[file])
Send a "BODY" command, where id has the same meaning as for stat(). If the file parameter is supplied, then the body is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the body. Return as for head(). If file is supplied, then the returned list is an empty list.

article( id)
Send an "ARTICLE" command, where id has the same meaning as for stat(). Return as for head().

slave( )
Send a "SLAVE" command. Return the server's response.

xhdr( header, string, [file])
Send an "XHDR" command. This command is not defined in the RFC but is a common extension. The header argument is a header keyword, e.g. 'subject'. The string argument should have the form 'first-last' where first and last are the first and last article numbers to search. Return a pair (response, list), where list is a list of pairs (id, text), where id is an article number (as a string) and text is the text of the requested header for that article. If the file parameter is supplied, then the output of the "XHDR" command is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the command output. If file is supplied, then the returned list is an empty list.

post( file)
Post an article using the "POST" command. The file argument is an open file object which is read until EOF using its readline() method. It should be a well-formed news article, including the required headers. The post() method automatically escapes lines beginning with ".".

ihave( id, file)
Send an "IHAVE" command. id is a message id (enclosed in "<" and ">"). If the response is not an error, treat file exactly as for the post() method.

date( )
Return a triple (response, date, time), containing the current date and time in a form suitable for the newnews() and newgroups() methods. This is an optional NNTP extension, and may not be supported by all servers.

xgtitle( name, [file])
Process an "XGTITLE" command, returning a pair (response, list), where list is a list of tuples containing (name, title). If the file parameter is supplied, then the output of the "XGTITLE" command is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the command output. If file is supplied, then the returned list is an empty list. This is an optional NNTP extension, and may not be supported by all servers.

RFC2980 says ``It is suggested that this extension be deprecated''. Use descriptions() or description() instead.

xover( start, end, [file])
Return a pair (resp, list). list is a list of tuples, one for each article in the range delimited by the start and end article numbers. Each tuple is of the form (article number, subject, poster, date, id, references, size, lines). If the file parameter is supplied, then the output of the "XOVER" command is stored in a file. If file is a string, then the method will open a file object with that name, write to it then close it. If file is a file object, then it will start calling write() on it to store the lines of the command output. If file is supplied, then the returned list is an empty list. This is an optional NNTP extension, and may not be supported by all servers.

xpath( id)
Return a pair (resp, path), where path is the directory path to the article with message ID id. This is an optional NNTP extension, and may not be supported by all servers.

quit( )
Send a "QUIT" command and close the connection. Once this method has been called, no other methods of the NNTP object should be called.
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