IGN:...

src/calibre/gui2/library.py

@@ -175,8 +175,7 @@ class BooksModel(QAbstractTableModel):
             self.endInsertRows()
 
     def search(self, text, refinement, reset=True):
-        tokens, OR = self.search_tokens(text)
-        self.db.filter(tokens, refilter=refinement, OR=OR)
+        self.db.search(text)
         self.last_search = text
         if reset:
             self.clear_caches()

src/calibre/library/cli.py

@@ -9,6 +9,7 @@ Command line interface to the calibre database.
 
 import sys, os, cStringIO
 from textwrap import TextWrapper
+from urllib import quote
 
 from calibre import terminal_controller, preferred_encoding
 from calibre.utils.config import OptionParser, prefs
@@ -18,7 +19,6 @@ except:
     send_message = None
 from calibre.ebooks.metadata.meta import get_metadata
 from calibre.library.database2 import LibraryDatabase2
-from calibre.library.database import text_to_tokens
 from calibre.ebooks.metadata.opf import OPFCreator, OPFReader
 from calibre.utils.genshi.template import MarkupTemplate
 
@@ -67,6 +67,8 @@ STANZA_TEMPLATE='''\
     <name>calibre</name>
     <uri>http://calibre.kovidgoyal.net</uri>
   </author>
+  <id>$id</id>
+  <updated>${updated.strftime('%Y-%m-%dT%H:%M:%SZ')}</updated>
   <subtitle>
         ${subtitle}
   </subtitle>
@@ -75,11 +77,11 @@ STANZA_TEMPLATE='''\
       <title>${record['title']}</title>
       <id>urn:calibre:${record['id']}</id>
       <author><name>${record['authors']}</name></author>
-      <updated>${record['timestamp'].strftime('%Y-%m-%dT%H:%M:%S+0000')}</updated>
-      <link type="application/epub+zip" href="${record['fmt_epub'].replace(sep, '/')}" />
-      <link py:if="record['cover']" rel="x-stanza-cover-image" type="image/png" href="${record['cover'].replace(sep, '/')}" />
-      <content py:if="record['comments']" type="xhtml">
-          <pre>${record['comments']}</pre>
+      <updated>${record['timestamp'].strftime('%Y-%m-%dT%H:%M:%SZ')}</updated>
+      <link type="application/epub+zip" href="${quote(record['fmt_epub'].replace(sep, '/'))}" />
+      <link py:if="record['cover']" rel="x-stanza-cover-image" type="image/png" href="${quote(record['cover'].replace(sep, '/'))}" />
+      <content type="xhtml">
+          <div xmlns="http://www.w3.org/1999/xhtml"><pre>${record['comments']}</pre></div>
       </content>
   </entry>
   </py:for>
@@ -97,15 +99,14 @@ def get_db(dbpath, options):
     if options.library_path is not None:
         dbpath = options.library_path
     dbpath = os.path.abspath(dbpath)
-    print _('Using library at'), dbpath
     return LibraryDatabase2(dbpath, row_factory=True)
 
 def do_list(db, fields, sort_by, ascending, search_text, line_width, separator, 
             prefix, output_format, subtitle='Books in the calibre database'):
-    db.refresh(sort_by, ascending)
+    if sort_by:
+        db.sort(sort_by, ascending)
     if search_text:
-        filters, OR = text_to_tokens(search_text)
-        db.filter(filters, False, OR)
+        db.search(search_text)
     authors_to_string = output_format in ['stanza', 'text']
     data = db.get_data_as_dict(prefix, authors_as_string=authors_to_string)
     fields = ['id'] + fields
@@ -159,7 +160,8 @@ def do_list(db, fields, sort_by, ascending, search_text, line_width, separator,
     elif output_format == 'stanza':
         data = [i for i in data if i.has_key('fmt_epub')]
         template = MarkupTemplate(STANZA_TEMPLATE)
-        return template.generate(data=data, subtitle=subtitle, sep=os.sep).render('xml')
+        return template.generate(id="urn:calibre:main", data=data, subtitle=subtitle, 
+                sep=os.sep, quote=quote, updated=db.last_modified()).render('xml')
             
 
 
@@ -173,7 +175,7 @@ List the books available in the calibre database.
                             ))
     parser.add_option('-f', '--fields', default='title,authors',
                       help=_('The fields to display when listing books in the database. Should be a comma separated list of fields.\nAvailable fields: %s\nDefault: %%default. The special field "all" can be used to select all fields. Only has effect in the text output format.')%','.join(FIELDS))
-    parser.add_option('--sort-by', default='timestamp',
+    parser.add_option('--sort-by', default=None,
                       help=_('The field by which to sort the results.\nAvailable fields: %s\nDefault: %%default')%','.join(FIELDS))
     parser.add_option('--ascending', default=False, action='store_true',
                       help=_('Sort results in ascending order'))
@@ -197,7 +199,7 @@ List the books available in the calibre database.
         return 1
 
     db = get_db(dbpath, opts)
-    if not opts.sort_by in FIELDS:
+    if not opts.sort_by in FIELDS and opts.sort_by is not None:
         parser.print_help()
         print
         print >>sys.stderr, _('Invalid sort field. Available fields:'), ','.join(FIELDS)
@@ -461,7 +463,7 @@ show_metadata command.
 
 def do_export(db, ids, dir, single_dir, by_author):
     if ids is None:
-        ids = db.all_ids()
+        ids = list(db.all_ids())
     db.export_to_dir(dir, ids, byauthor=by_author, single_dir=single_dir, index_is_id=True)
 
 def command_export(args, dbpath):

src/calibre/library/database2.py

@@ -9,6 +9,7 @@ The database used to store ebook metadata
 import os, re, sys, shutil, cStringIO, glob, collections, textwrap, \
        operator, itertools, functools, traceback
 from itertools import repeat
+from datetime import datetime
 
 from PyQt4.QtCore import QCoreApplication, QThread, QReadWriteLock
 from PyQt4.QtGui import QApplication, QPixmap, QImage
@@ -16,6 +17,7 @@ __app = None
 
 from calibre.library.database import LibraryDatabase
 from calibre.library.sqlite import connect, IntegrityError
+from calibre.utils.search_query_parser import SearchQueryParser
 from calibre.ebooks.metadata import string_to_authors, authors_to_string
 from calibre.constants import preferred_encoding, iswindows, isosx
 
@@ -48,6 +50,12 @@ def sanitize_file_name(name, substitute='_'):
     one = _filename_sanitize.sub(substitute, name)
     return re.sub(r'\s', ' ', one).strip()
 
+FIELD_MAP = {'id':0, 'title':1, 'authors':2, 'publisher':3, 'rating':4, 'timestamp':5, 
+             'size':6, 'tags':7, 'comments':8, 'series':9, 'series_index':10,
+             'sort':11, 'author_sort':12, 'formats':13, 'isbn':14}
+INDEX_MAP = dict(zip(FIELD_MAP.values(), FIELD_MAP.keys()))
+
+
 class CoverCache(QThread):
     
     def __init__(self, library_path, parent=None):
@@ -158,27 +166,15 @@ class CoverCache(QThread):
             self.load_queue.appendleft(id)
         self.load_queue_lock.unlock()
     
-class ResultCache(object):
+class ResultCache(SearchQueryParser):
     
     '''
     Stores sorted and filtered metadata in memory.
     '''
     
-    METHOD_MAP = {
-                  'title'        : 'title',
-                  'authors'      : 'author_sort',
-                  'author'       : 'author_sort',
-                  'publisher'    : 'publisher',
-                  'size'         : 'size',
-                  'date'         : 'timestamp',
-                  'timestamp'    : 'timestamp',
-                  'rating'       : 'rating',
-                  'tags'         : 'tags',
-                  'series'       : 'series',
-                  }
-    
     def __init__(self):
         self._map = self._map_filtered = self._data = []
+        SearchQueryParser.__init__(self)
         
     def __getitem__(self, row):
         return self._data[self._map_filtered[row]]
@@ -190,6 +186,31 @@ class ResultCache(object):
         for id in self._map_filtered:
             yield self._data[id]
 
+    def universal_set(self):
+        return set([i[0] for i in self._data if i is not None])
+
+    def get_matches(self, location, query):
+        matches = set([])
+        if query and query.strip():
+            location = location.lower().strip()
+            query = query.lower()
+            if location in ('tag', 'author', 'format'):
+                location += 's'
+            all = ('title', 'authors', 'publisher', 'tags', 'comments', 'series', 'formats')
+            MAP = {}
+            for x in all:
+                MAP[x] = FIELD_MAP[x]
+            location = [location] if location != 'all' else list(MAP.keys())
+            for i, loc in enumerate(location):
+                location[i] = MAP[loc]
+            for item in self._data:
+                if item is None: continue
+                for loc in location:
+                    if item[loc] and query in item[loc].lower():
+                        matches.add(item[0])
+                        break
+        return matches
+            
     def remove(self, id):
         self._data[id] = None
         if id in self._map:
@@ -222,103 +243,49 @@ class ResultCache(object):
         self._map[0:0] = ids
         self._map_filtered[0:0] = ids
     
-    def refresh(self, db, field, ascending):
-        field = field.lower()
-        method = getattr(self, 'sort_on_' + self.METHOD_MAP[field])
-        # Fast mapping from sorted row numbers to ids
-        self._map = map(operator.itemgetter(0), method('ASC' if ascending else 'DESC', db)) # Preserves sort order
-        # Fast mapping from sorted, filtered row numbers to ids
-        # At the moment it is the same as self._map
-        self._map_filtered = list(self._map)
+    def refresh(self, db, field=None, ascending=True):
         temp = db.conn.get('SELECT * FROM meta')
-        # Fast mapping from ids to data. 
-        # Can be None for ids that dont exist (i.e. have been deleted)
         self._data = list(itertools.repeat(None, temp[-1][0]+2)) if temp else []
         for r in temp:
             self._data[r[0]] = r
-    
-    def filter(self, filters, refilter=False, OR=False):
-        '''
-        Filter data based on filters. All the filters must match for an item to
-        be accepted. Matching is case independent regexp matching.
-        @param filters: A list of SearchToken objects
-        @param refilter: If True filters are applied to the results of the previous
-                         filtering.
-        @param OR: If True, keeps a match if any one of the filters matches. If False,
-        keeps a match only if all the filters match
-        '''
-        if not refilter:
+        self._map = [i[0] for i in self._data if i is not None]
+        if field is not None:
+            self.sort(field, ascending)
         self._map_filtered = list(self._map)
-        if filters:
-            remove = []
-            for id in self._map_filtered:
-                if OR:
-                    keep = False
-                    for token in filters:
-                        if token.match(self._data[id]):
-                            keep = True
-                            break
-                    if not keep:
-                        remove.append(id)
-                else:
-                    for token in filters:
-                        if not token.match(self._data[id]):
-                            remove.append(id)
-                            break
-            for id in remove:
-                self._map_filtered.remove(id)
     
-    def sort_on_title(self, order, db):
-        return db.conn.get('SELECT id FROM books ORDER BY sort ' + order)
+    def seriescmp(self, x, y):
+        ans = self.strcmp(self._data[x][9], self._data[y][9])
+        if ans != 0: return ans
+        return cmp(self._data[x][10], self._data[y][10])
     
-    def sort_on_author_sort(self, order, db):
-        return db.conn.get('SELECT id FROM books ORDER BY author_sort,sort ' + order)
+    def cmp(self, loc, x, y, str=True):
+        ans = cmp(self._data[x][loc].lower(), self._data[y][loc].lower()) if str else\
+              cmp(self._data[x][loc], self._data[y][loc])
+        if ans != 0: return ans
+        return cmp(self._data[x][11].lower(), self._data[y][11].lower())
     
-    def sort_on_timestamp(self, order, db):
-        return db.conn.get('SELECT id FROM books ORDER BY id ' + order)
+    def sort(self, field, ascending):
+        import time
+        start = time.time()
+        field = field.lower().strip()
+        if field in ('author', 'tag', 'comment'):
+            field += 's'
+        if field == 'date': field = 'timestamp'
+        elif field == 'title': field = 'sort'
+        elif field == 'author': field = 'author_sort'
+        fcmp = self.seriescmp if field == 'series' else \
+            functools.partial(self.cmp, FIELD_MAP[field], field not in ('size', 'rating', 'timestamp'))
+        self._map.sort(cmp=fcmp, reverse=not ascending)
+        print time.time() - start
                 
-    def sort_on_publisher(self, order, db):
-        no_publisher = db.conn.get('SELECT id FROM books WHERE books.id NOT IN (SELECT book FROM books_publishers_link) ORDER BY books.sort')
-        ans = []
-        for r in db.conn.get('SELECT id FROM publishers ORDER BY name '+order):
-            publishers_id = r[0]
-            ans += db.conn.get('SELECT id FROM books WHERE books.id IN (SELECT book FROM books_publishers_link WHERE publisher=?) ORDER BY books.sort '+order, (publishers_id,))
-        ans = (no_publisher + ans) if order == 'ASC' else (ans + no_publisher)
-        return ans 
+    def search(self, query):
+        if not query or not query.strip():
+            self._map_filtered = list(self._map)
+            return
+        matches = sorted(self.parse(query))
+        self._map_filtered = [id for id in self._map if id in matches]
     
     
-    def sort_on_size(self, order, db): 
-        return db.conn.get('SELECT id FROM meta ORDER BY size ' + order)
-    
-    def sort_on_rating(self, order, db): 
-        no_rating = db.conn.get('SELECT id FROM books WHERE books.id NOT IN (SELECT book FROM books_ratings_link) ORDER BY books.sort')
-        ans = []
-        for r in db.conn.get('SELECT id FROM ratings ORDER BY rating '+order):
-            ratings_id = r[0]
-            ans += db.conn.get('SELECT id FROM books WHERE books.id IN (SELECT book FROM books_ratings_link WHERE rating=?) ORDER BY books.sort', (ratings_id,))
-        ans = (no_rating + ans) if order == 'ASC' else (ans + no_rating)
-        return ans 
-        
-    
-    def sort_on_series(self, order, db):
-        no_series = db.conn.get('SELECT id FROM books WHERE books.id NOT IN (SELECT book FROM books_series_link) ORDER BY books.sort')
-        ans = []
-        for r in db.conn.get('SELECT id FROM series ORDER BY name '+order):
-            series_id = r[0]
-            ans += db.conn.get('SELECT id FROM books WHERE books.id IN (SELECT book FROM books_series_link WHERE series=?) ORDER BY books.series_index,books.id '+order, (series_id,))
-        ans = (no_series + ans) if order == 'ASC' else (ans + no_series)
-        return ans 
-        
-    
-    def sort_on_tags(self, order, db):
-        no_tags = db.conn.get('SELECT id FROM books WHERE books.id NOT IN (SELECT book FROM books_tags_link) ORDER BY books.sort')
-        ans = []
-        for r in db.conn.get('SELECT id FROM tags ORDER BY name '+order):
-            tag_id = r[0]
-            ans += db.conn.get('SELECT id FROM books WHERE books.id IN (SELECT book FROM books_tags_link WHERE tag=?) ORDER BY books.sort '+order, (tag_id,))
-        ans = (no_tags + ans) if order == 'ASC' else (ans + no_tags)
-        return ans 
-
 class Tag(unicode):
     
     def __init__(self, name):
@@ -381,8 +348,10 @@ class LibraryDatabase2(LibraryDatabase):
                 self.user_version += 1
         
         self.data    = ResultCache()
-        self.filter  = self.data.filter
+        self.data.refresh()
+        self.search  = self.data.search
         self.refresh = functools.partial(self.data.refresh, self)
+        self.sort    = functools.partial(self.data.refresh, self)
         self.index   = self.data.index
         self.refresh_ids = functools.partial(self.data.refresh_ids, self.conn)
         self.row     = self.data.row
@@ -423,6 +392,10 @@ class LibraryDatabase2(LibraryDatabase):
         self.conn.executescript(script%dict(ltable='tags', table='tags', ltable_col='tag'))
         self.conn.executescript(script%dict(ltable='series', table='series', ltable_col='series'))
     
+    def last_modified(self):
+        ''' Return last modified time as a UTC datetime object'''
+        return datetime.utcfromtimestamp(os.stat(self.dbpath).st_mtime)
+
     def path(self, index, index_is_id=False):
         'Return the relative path to the directory containing this books files as a unicode string.'
         id = index if index_is_id else self.id(index)
@@ -993,12 +966,18 @@ class LibraryDatabase2(LibraryDatabase):
             
     
     def __iter__(self):
-        if len(self.data) == 0:
+        if len(self.data._data) == 0:
             self.refresh('timestamp', True)
-        for record in self.data:
+        for record in self.data._data:
             if record is not None:
                 yield record
     
+    def all_ids(self):
+        for i in iter(self):
+            yield i['id']
+            
+    def count(self):
+        return len(self.data._map)
     
     def get_data_as_dict(self, prefix=None, authors_as_string=False):
         '''
@@ -1012,7 +991,10 @@ class LibraryDatabase2(LibraryDatabase):
             prefix = self.library_path
         FIELDS = set(['title', 'authors', 'publisher', 'rating', 'timestamp', 'size', 'tags', 'comments', 'series', 'series_index', 'isbn'])
         data = []
-        for record in iter(self):
+        if len(self.data) == 0:
+            self.refresh(None, True)
+        for record in self.data:
+            if record is None: continue
             x = {}
             for field in FIELDS:
                 x[field] = record[field]

src/calibre/library/server.py

@@ -7,7 +7,8 @@ __docformat__ = 'restructuredtext en'
 HTTP server for remote access to the calibre database.
 '''
 
-import sys, textwrap, cStringIO, mimetypes
+import sys, textwrap, cStringIO, mimetypes, operator, os
+from datetime import datetime
 import cherrypy
 from PIL import Image
 
@@ -36,19 +37,20 @@ class LibraryServer(object):
             author_sort="${r[12]}"
             authors="${authors}" 
             rating="${r[4]}"
-            timestamp="${timestamp.ctime()}" 
+            timestamp="${r[5].ctime()}" 
             size="${r[6]}" 
             isbn="${r[14] if r[14] else ''}"
             formats="${r[13] if r[13] else ''}"
             series = "${r[9] if r[9] else ''}"
             series_index="${r[10]}"
             tags="${r[7] if r[7] else ''}"
-            publisher="${r[3] if r[3] else ''}">${r[8] if r[8] else ''}</book>
+            publisher="${r[3] if r[3] else ''}">${r[8] if r[8] else ''}
+            </book>
         ''')
     
     LIBRARY = MarkupTemplate(textwrap.dedent('''\
     <?xml version="1.0" encoding="utf-8"?>
-    <library xmlns:py="http://genshi.edgewall.org/" size="${len(books)}">
+    <library xmlns:py="http://genshi.edgewall.org/" start="$start" num="${len(books)}" total="$total" updated="${updated.strftime('%Y-%m-%dT%H:%M:%S+00:00')}>
     <py:for each="book in books">
         ${Markup(book)}
     </py:for>
@@ -60,12 +62,12 @@ class LibraryServer(object):
         <title>${record['title']}</title>
         <id>urn:calibre:${record['id']}</id>
         <author><name>${authors}</name></author>
-        <updated>${record['timestamp'].strftime('%Y-%m-%dT%H:%M:%S+0000')}</updated>
+        <updated>${record['timestamp'].strftime('%Y-%m-%dT%H:%M:%S+00:00')}</updated>
         <link type="application/epub+zip" href="http://${server}:${port}/get/epub/${record['id']}" />
         <link rel="x-stanza-cover-image" type="image/jpeg" href="http://${server}:${port}/get/cover/${record['id']}" />
         <link rel="x-stanza-cover-image-thumbnail" type="image/jpeg" href="http://${server}:${port}/get/thumb/${record['id']}" />
-        <content py:if="record['comments']" type="xhtml">
-          <pre>${record['comments']}</pre>
+        <content type="xhtml">
+          <div xmlns="http://www.w3.org/1999/xhtml"><pre>${record['comments']}</pre></div>
         </content>
     </entry>
     '''))
@@ -74,6 +76,8 @@ class LibraryServer(object):
     <?xml version="1.0" encoding="utf-8"?>
     <feed xmlns="http://www.w3.org/2005/Atom" xmlns:py="http://genshi.edgewall.org/">
       <title>calibre Library</title>
+      <id>$id</id>
+      <updated>${updated.strftime('%Y-%m-%dT%H:%M:%S+00:00')}</updated>
       <author>
         <name>calibre</name>
         <uri>http://calibre.kovidgoyal.net</uri>
@@ -94,6 +98,7 @@ class LibraryServer(object):
             item
             break
         self.opts = opts
+        
         cherrypy.config.update({
                                 'server.socket_port': opts.port,
                                 'server.socket_timeout': opts.timeout, #seconds
@@ -106,14 +111,6 @@ class LibraryServer(object):
         tools.gzip.mime_types = ['text/html', 'text/plain', 'text/xml']
         ''')%dict(autoreload=opts.develop)
         
-    def to_xml(self):
-        books = []
-        book = MarkupTemplate(self.BOOK)
-        for record in iter(self.db):
-            authors = ' & '.join([i.replace('|', ',') for i in record[2].split(',')])
-            books.append(book.generate(r=record, authors=authors).render('xml').decode('utf-8'))
-        return self.LIBRARY.generate(books=books).render('xml')
-    
     def start(self):
         cherrypy.quickstart(self, config=cStringIO.StringIO(self.config))
     
@@ -122,6 +119,10 @@ class LibraryServer(object):
         if cover is None:
             raise cherrypy.HTTPError(404, 'no cover available for id: %d'%id)
         cherrypy.response.headers['Content-Type'] = 'image/jpeg'
+        path = getattr(cover, 'name', None)
+        if path and os.path.exists(path):
+            updated = datetime.fromutctimestamp(os.stat(path).st_mtime)
+            cherrypy.response.headers['Last-Modified'] = self.last_modified(updated)
         if not thumbnail:
             return cover.read()
         try:
@@ -139,18 +140,41 @@ class LibraryServer(object):
         
     def get_format(self, id, format):
         format = format.upper()
-        fmt = self.db.format(id, format, index_is_id=True)
+        fmt = self.db.format(id, format, index_is_id=True, as_file=True, mode='rb')
         if fmt is None:
             raise cherrypy.HTTPError(404, 'book: %d does not have format: %s'%(id, format))
         mt = mimetypes.guess_type('dummy.'+format.lower())[0]
         if mt is None:
             mt = 'application/octet-stream'
         cherrypy.response.headers['Content-Type'] = mt
-        return fmt
+        path = getattr(fmt, 'name', None)
+        if path and os.path.exists(path):
+            updated = datetime.fromutctimestamp(os.stat(path).st_mtime)
+            cherrypy.response.headers['Last-Modified'] = self.last_modified(updated)
+        return fmt.read()
+    
+    def sort(self, items, field):
+        field = field.lower().strip()
+        if field == 'author':
+            field = 'authors'
+        if field not in ('title', 'authors', 'rating'):
+            raise cherrypy.HTTPError(400, '%s is not a valid sort field'%field)
+        cmpf = cmp if field == 'rating' else lambda x, y: cmp(x.lower(), y.lower())
+        field = {'title':11, 'authors':12, 'rating':4}[field]
+        getter = operator.itemgetter(field)
+        items.sort(cmp=lambda x, y: cmpf(getter(x), getter(y)))
+    
+    def last_modified(self, updated):
+        lm = updated.strftime('day, %d month %Y %H:%M:%S GMT')
+        day ={0:'Sun', 1:'Mon', 2:'Tue', 3:'Wed', 4:'Thu', 5:'Fri', 6:'Sat'}
+        lm = lm.replace('day', day[int(lm.strftime('%w'))])
+        month = {1:'Jan', 2:'Feb', 3:'Mar', 4:'Apr', 5:'May', 6:'Jun', 7:'Jul',
+                 8:'Aug', 9:'Sep', 10:'Oct', 11:'Nov', 12:'Dec'}
+        return lm.replace('month', month[updated.month])
+        
         
     @expose
     def stanza(self):
-        cherrypy.response.headers['Content-Type'] = 'text/xml'
         books = []
         for record in iter(self.db):
             if 'EPUB' in record['formats'].upper():
@@ -160,12 +184,45 @@ class LibraryServer(object):
                                                         port=self.opts.port, 
                                                         server=self.opts.hostname,
                                                         ).render('xml').decode('utf8'))
-        return self.STANZA.generate(subtitle='', data=books).render('xml')
+        
+        updated = self.db.last_modified()
+        cherrypy.response.headers['Last-Modified'] = self.last_modified(updated)
+        cherrypy.response.headers['Content-Type'] = 'text/xml'
+        
+        return self.STANZA.generate(subtitle='', data=books, 
+                    updated=updated, id='urn:calibre:main').render('xml')
     
     @expose
-    def library(self):
+    def library(self, start='0', num='50', sort=None, search=None):
+        '''
+        :param sort: Sort results by ``sort``. Can be one of `title,author,rating`.
+        :param search: Filter results by ``search`` query. See :class:`SearchQueryParser` for query syntax
+        :param start,num: Return the slice `[start:start+num]` of the sorted and filtered results 
+        '''
+        try:
+            start = int(start)
+        except ValueError:
+            raise cherrypy.HTTPError(400, 'start: %s is not an integer'%start)
+        try:
+            num = int(num)
+        except ValueError:
+            raise cherrypy.HTTPError(400, 'num: %s is not an integer'%num)
+        ids = self.db.data.parse(search) if search else self.db.data.universal_set()
+        ids = sorted(ids)
+        items = [r for r in iter(self.db) if r[0] in ids]
+        if sort is not None:
+            self.sort(items, sort)
+        
+        book, books = MarkupTemplate(self.BOOK), []
+        for record in items[start:start+num]:
+            authors = ' & '.join([i.replace('|', ',') for i in record[2].split(',')])
+            books.append(book.generate(r=record, authors=authors).render('xml').decode('utf-8'))
+        updated = self.db.last_modified()
+        
         cherrypy.response.headers['Content-Type'] = 'text/xml'
-        return self.to_xml()
+        cherrypy.response.headers['Last-Modified'] = self.last_modified(updated)
+        return self.LIBRARY.generate(books=books, start=start, updated=updated, 
+                                     total=self.db.count()).render('xml')
     
     @expose
     def index(self):

src/calibre/utils/search_query_parser.py

@@ -122,7 +122,7 @@ class SearchQueryParser(object):
         
         self._parser = Or
         #self._parser.setDebug(True)
-        self.parse('(tolstoy)')
+        #self.parse('(tolstoy)')
         self._parser.setDebug(False)