Implemented building isbndb.com queries

setup.py

@@ -33,7 +33,8 @@ entry_points = {
                              'web2lrf   = libprs500.ebooks.lrf.web.convert_from:main',
                              'pdf2lrf   = libprs500.ebooks.lrf.pdf.convert_from:main',
                              'any2lrf   = libprs500.ebooks.lrf.any.convert_from:main',
-                             'lrf2lrs   = libprs500.ebooks.lrf.parser:main',                             
+                             'lrf2lrs   = libprs500.ebooks.lrf.parser:main',
+                             'isbndb     = libprs500.ebooks.metadata.isbndb:main',                             
                            ], 
         'gui_scripts'    : [ 
                             APPNAME+' = libprs500.gui2.main:main',

src/libprs500/ebooks/metadata/isbndb.py

@@ -0,0 +1,96 @@
+##    Copyright (C) 2007 Kovid Goyal kovid@kovidgoyal.net
+##    This program is free software; you can redistribute it and/or modify
+##    it under the terms of the GNU General Public License as published by
+##    the Free Software Foundation; either version 2 of the License, or
+##    (at your option) any later version.
+##
+##    This program is distributed in the hope that it will be useful,
+##    but WITHOUT ANY WARRANTY; without even the implied warranty of
+##    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+##    GNU General Public License for more details.
+##
+##    You should have received a copy of the GNU General Public License along
+##    with this program; if not, write to the Free Software Foundation, Inc.,
+##    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+'''
+Interface to isbndb.com
+'''
+
+import sys, logging, re
+from urllib import urlopen, quote
+from optparse import OptionParser
+
+from libprs500 import __appname__, __version__, __author__, setup_cli_handlers
+
+BASE_URL = 'http://isbndb.com/api/books.xml?access_key=%(key)s&results=subjects,authors&'
+
+class ISNDBError(Exception):
+    pass
+
+def build_isbn(base_url, opts):
+    return base_url + 'index1=isbn&value1='+opts.isbn
+
+def build_combined(base_url, opts):
+    query = ''
+    for e in (opts.title, opts.author, opts.publisher):
+        if e is not None:
+            query += ' ' + e
+    query = query.strip()
+    if len(query) == 0:
+        raise ISNDBError('You must specify at least one of --author, --title or --publisher')
+    
+    query = re.sub('\s+', '+', query)  
+    return base_url+'index1=combined&value1='+quote(query, '+')    
+
+
+def option_parser():
+    parser = OptionParser(epilog='Created by '+__author__, version=__appname__+' '+__version__,
+                          usage=\
+'''
+%prog [options] key
+
+Fetch metadata for books from isndb.com. You can specify either the 
+books ISBN ID or its title and author. If you specify the title and author,
+then more than one book may be returned.
+
+key is the account key you generate after signing up for a free account from isbndb.com.
+
+''')
+    parser.add_option('-i', '--isbn', default=None, dest='isbn',
+                      help='The ISBN ID of the book you want metadata for.')
+    parser.add_option('-a', '--author', dest='author',
+                      default=None, help='The author whoose book to search for.')
+    parser.add_option('-t', '--title', dest='title',
+                      default=None, help='The title of the book to search for.')
+    parser.add_option('-p', '--publisher', default=None, dest='publisher',
+                      help='The publisher of the book to search for.')
+    parser.add_option('--verbose', default=False, action='store_true', help='Verbose processing')
+    
+    return parser
+    
+    
+def main(args=sys.argv, logger=None):
+    parser = option_parser()
+    opts, args = parser.parse_args(args)
+    if len(args) != 2:
+        parser.print_help()
+        print('You must supply the isbndb.com key')
+        return 1
+    if logger is None:
+        level = logging.DEBUG if opts.verbose else logging.INFO
+        logger = logging.getLogger('isbndb')
+        setup_cli_handlers(logger, level)
+    
+    base_url = BASE_URL%dict(key=args[1])
+    if opts.isbn is not None:
+        url = build_isbn(base_url, opts)
+    else:
+        url = build_combined(base_url, opts)
+        
+    logger.info('ISBNDB query: '+url)
+        
+        
+    return 0
+
+if __name__ == '__main__':
+    sys.exit(main())