--- /dev/null
+ NEWSLIST
+ ========
+ A program to assist HTTP browsing of newsgroups
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+WWW browsers such as NCSA Mosaic allow the user to read newsgroup
+articles by specifying the group name in a URL eg 'news:comp.answers'.
+
+To browse through many groups, though, (and there are several thousand
+of them) you really need a page or pages containing links to all the
+groups. There are some good ones out there, for example,
+
+ http://info.cern.ch/hypertext/DataSources/News/Groups/Overview.html
+
+is the standard one at CERN, but it only shows the groups available there,
+which may be rather different from those available on your machine.
+
+Newslist is a program which creates a hierarchy of pages for you based
+on the groups available from YOUR server. It is written in python - a
+splendid interpreted object-oriented language which I suggest you get
+right now from the directory /pub/python at ftp.cwi.nl, if you haven't
+already got it.
+
+You should be able to see some sample output by looking at:
+ http://pelican.cl.cam.ac.uk/newspage/root.html
+
+Descriptions of newsgroups can be added from a file with one group
+per line. eg:
+
+ alt.foo Articles about foo
+ comp.bar Programming in 'bar' and related languages
+
+A suitable list detailing most groups can be found at ftp.uu.net in
+/uunet-info/newsgroups.gz.
+
+Make sure you read the information at the beginning of the program source and
+configure the variables before running.
+
+In addition to python, you need:
+
+ An NNTP-based news feed.
+ A directory in which to put the pages.
+
+The programming is not very beautiful, but it works! It comes with no
+warranty, express or implied, but with the hope that some others may
+find it useful.
+
+Comments, improvements & suggestions welcomed.
+Quentin Stafford-Fraser
+
+ ----------------------------------------------------------------------
+ Quentin Stafford-Fraser
+ http://pelican.cl.cam.ac.uk/people/qs101/me.html
+
+ Cambridge University Computer Lab Rank Xerox Cambridge EuroPARC
+ qs101@cl.cam.ac.uk fraser@europarc.xerox.com
+ Tel: +44 223 334411 Tel: +44 223 341521
+ Fax: +44 223 334679 Fax: +44 223 341510
+ ----------------------------------------------------------------------
--- /dev/null
+#! /usr/local/bin/python
+#######################################################################
+# Newslist $Revision$
+#
+# Syntax:
+# newslist [ -a ]
+#
+# This is a program to create a directory full of HTML pages
+# which between them contain links to all the newsgroups available
+# on your server.
+#
+# The -a option causes a complete list of all groups to be read from
+# the server rather than just the ones which have appeared since last
+# execution. This recreates the local list from scratch. Use this on
+# the first invocation of the program.
+#
+# This assumes an NNTP news feed.
+#
+# Feel free to copy, distribute and modify this code for
+# non-commercial use. If you make any useful modifications, let me
+# know!
+#
+# (c) Quentin Stafford-Fraser 1994
+# fraser@europarc.xerox.com qs101@cl.cam.ac.uk
+# #
+#######################################################################
+import sys,nntplib, string, marshal, time, os, posix, string
+
+#######################################################################
+# Check these variables before running! #
+
+# Top directory.
+# Filenames which don't start with / are taken as being relative to this.
+##topdir='/anfs/qsbigdisc/web/html/newspage'
+topdir = '/hosts/buizerd/ufs/www/cwi/cwionly/newstree'
+
+# The name of your NNTP host
+# eg.
+# newshost = 'nntp-serv.cam.ac.uk'
+# or use following to get the name from the NNTPSERVER environment
+# variable:
+##newshost = posix.environ['NNTPSERVER']
+newshost = 'charon.cwi.nl'
+
+# The filename for a local cache of the newsgroup list
+treefile = 'grouptree'
+
+# The filename for descriptions of newsgroups
+# I found a suitable one at ftp.uu.net in /uunet-info/newgroups.gz
+# You can set this to '' if you don't wish to use one.
+##descfile = 'newsgroups'
+descfile = '/usr/lib/news/newsgroups'
+
+# The directory in which HTML pages should be created
+# eg.
+# pagedir = '/usr/local/lib/html/newspage'
+# pagedir = 'pages'
+pagedir = topdir
+
+# The html prefix which will refer to this directory
+# eg.
+# httppref = '/newspage/',
+# or leave blank for relative links
+# between pages. (Recommended)
+httppref = ''
+
+# The name of the 'root' news page in this directory.
+# A .html suffix will be added.
+##rootpage = 'root'
+rootpage = 'index'
+
+# Set skipempty to 0 if you wish to see links to empty groups as well.
+# Only affects the -a option.
+##skipempty = 1
+skipempty = 0
+
+# ---------------------------------------------------------------------
+# Less important personal preferences:
+
+# Sublistsize controls the maximum number of items the will appear as
+# an indented sub-list before the whole thing is moved onto a different
+# page. The smaller this is, the more pages you will have, but the
+# shorter each will be.
+sublistsize = 4
+
+# That should be all. #
+#######################################################################
+
+from nntplib import NNTP
+from stat import *
+
+rcsrev = '$Revision$'[11:15]
+desc = {}
+
+# Make (possibly) relative filenames into absolute ones
+treefile = os.path.join(topdir,treefile)
+descfile = os.path.join(topdir,descfile)
+page = os.path.join(topdir,pagedir)
+
+# First the bits for creating trees ---------------------------
+
+# Addtotree creates/augments a tree from a list of group names
+def addtotree(tree, groups):
+ print 'Updating tree...'
+ for i in groups:
+ parts = string.splitfields(i,'.')
+ makeleaf(tree, parts)
+
+# Makeleaf makes a leaf and the branch leading to it if necessary
+def makeleaf(tree,path):
+ j = path[0]
+ l = len(path)
+
+ if not tree.has_key(j):
+ tree[j] = {}
+ if l == 1:
+ tree[j]['.'] = '.'
+ if l > 1:
+ makeleaf(tree[j],path[1:])
+
+# Then the bits for outputting trees as pages ----------------
+
+# Createpage creates an HTML file named <root>.html containing links
+# to those groups beginning with <root>.
+
+def createpage(root, tree, p):
+ filename = os.path.join(pagedir,root+'.html')
+ if root == rootpage:
+ detail = ''
+ else:
+ detail = ' under ' + root
+ f = open(filename,'w')
+ # f.write('Content-Type: text/html\n')
+ f.write('<TITLE>Newsgroups available' + detail + '</TITLE>\n')
+ f.write('<H1>Newsgroups available' + detail +'</H1>\n')
+ f.write('<A HREF="'+httppref+rootpage+'.html">Back to top level</A><P>\n')
+ printtree(f,tree,0,p)
+ f.write('<I>This page automatically created by \'newslist\' v. '+rcsrev+'.')
+ f.write(time.ctime(time.time()) + '</I><P>')
+ f.close()
+
+# Printtree prints the groups as a bulleted list. Groups with
+# more than <sublistsize> subgroups will be put on a separate page.
+# Other sets of subgroups are just indented.
+
+def printtree(f, tree, indent, p):
+ global desc
+ l = len(tree)
+
+ if l > sublistsize and indent>0:
+ # Create a new page and a link to it
+ f.write('<LI><B><A HREF="'+httppref+p[1:]+'.html">')
+ f.write(p[1:]+'.* ...')
+ f.write('</A></B>\n')
+ createpage(p[1:], tree, p)
+ return
+
+ kl = tree.keys()
+
+ if l > 1:
+ kl.sort()
+ if indent > 0:
+ # Create a sub-list
+ f.write('<LI><B>'+p[1:]+'</B>\n<UL>')
+ else:
+ # Create a main list
+ f.write('<UL>')
+ indent = indent + 1
+
+ for i in kl:
+ if i == '.':
+ # Output a newsgroup
+ f.write('<LI><A HREF="news:' + p[1:] + '">'+ p[1:] + '</A> ')
+ if desc.has_key(p[1:]):
+ f.write(' <I>'+desc[p[1:]]+'</I>\n')
+ else:
+ f.write('\n')
+ else:
+ # Output a hierarchy
+ printtree(f,tree[i], indent, p+'.'+i)
+
+ if l > 1:
+ f.write('\n</UL>')
+
+# Reading descriptions file ---------------------------------------
+
+# This returns an array mapping group name to its description
+
+def readdesc():
+ global desc
+
+ desc = {}
+
+ if descfile == '':
+ return
+
+ try:
+ d = open(descfile, 'r')
+ print 'Reading descriptions...'
+ except (IOError):
+ print 'Failed to open description file ' + descfile
+ return
+ l = d.readline()
+ while l != '':
+ bits = string.split(l)
+ try:
+ grp = bits[0]
+ dsc = string.join(bits[1:])
+ if len(dsc)>1:
+ desc[grp] = dsc
+ except (IndexError):
+ pass
+ l = d.readline()
+
+# Now the main program --------------------------------------------
+
+def main():
+ global desc
+
+ connected = 0
+ tree={}
+
+ # Check that the output directory exists
+ if not os.path.isdir(pagedir):
+ print 'Directory '+pagedir+' does not exist.'
+ print 'Shall I create it for you? (y/n)'
+ if sys.stdin.readline()[0] == 'y':
+ try:
+ os.mkdir(pagedir,0777)
+ except:
+ print 'Sorry - failed!'
+ sys.exit(1)
+ else:
+ print 'OK. Exiting.'
+ sys.exit(1)
+
+ try:
+ print 'Connecting to '+newshost+'...'
+ if sys.version[0] == '0':
+ s = NNTP.init(newshost)
+ else:
+ s = NNTP(newshost)
+ connected = 1
+ except (nntplib.error_temp, nntplib.error_perm), x:
+ print 'Error connecting to host:'
+ print x
+ print 'I\'ll try to use just the local list.'
+
+ # If -a is specified, read the full list of groups from server
+ if connected and len(sys.argv) > 1 and sys.argv[1] == '-a':
+ print 'Getting list of all groups...'
+ treedate='010101'
+ info = s.list()[1]
+ groups = []
+ print 'Processing...'
+ if skipempty:
+ print '\nIgnoring following empty groups:'
+ for i in info:
+ if skipempty and string.atoi(i[1]) < string.atoi(i[2]):
+ print i[0]+' ',
+ else:
+ groups.append(i[0])
+ print '\n(End of empty groups)'
+
+ # Otherwise just read groups created since local file last modified.
+ else:
+ print 'Reading current local group list...'
+ try:
+ treetime = time.localtime(os.stat(treefile)[ST_MTIME])
+ except:
+ print '\n*** Failed to open local group cache '+treefile
+ print 'If this is the first time you have run newslist, then'
+ print 'use the -a option to create it.'
+ sys.exit(1)
+ treedate = '%02d%02d%02d' % (treetime[0] % 100 ,treetime[1], treetime[2])
+ try:
+ dump = open(treefile,'r')
+ tree = marshal.load(dump)
+ dump.close()
+ except (IOError):
+ print 'Cannot open local group list ' + treefile
+
+ if connected:
+ print 'Getting list of new groups since start of '+treedate+'...',
+ groups = s.newgroups(treedate,'000001')[1]
+ print 'got '+`len(groups)`+'.'
+
+ if connected:
+ addtotree(tree, groups)
+ try:
+ dump = open(treefile,'w')
+ groups = marshal.dump(tree,dump)
+ dump.close()
+ print 'Saved list to '+treefile+'\n'
+ except:
+ print 'Sorry - failed to write to local group cache '+treefile
+ print 'Does it (or its directory) have the correct permissions?'
+ sys.exit(1)
+
+ readdesc()
+ print 'Creating pages...'
+ createpage(rootpage, tree, '')
+ print 'Done'
+
+
+main()
+
+# That's all folks
+######################################################################
projects / thirdparty / Python / cpython.git / commitdiff
