| 1 | # -*- coding: utf-8 -*- |
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| 2 | ## |
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| 3 | ## |
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| 4 | ## This file is part of CDS Indico. |
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| 5 | ## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 CERN. |
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| 6 | ## |
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| 7 | ## CDS Indico is free software; you can redistribute it and/or |
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| 8 | ## modify it under the terms of the GNU General Public License as |
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| 9 | ## published by the Free Software Foundation; either version 2 of the |
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| 10 | ## License, or (at your option) any later version. |
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| 11 | ## |
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| 12 | ## CDS Indico is distributed in the hope that it will be useful, but |
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| 13 | ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | ## General Public License for more details. |
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| 16 | ## |
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| 17 | ## You should have received a copy of the GNU General Public License |
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| 18 | ## along with CDS Indico; if not, write to the Free Software Foundation, Inc., |
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| 19 | ## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. |
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| 20 | |
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| 21 | """ |
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| 22 | Main export interface |
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| 23 | """ |
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| 24 | |
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| 25 | # python stdlib imports |
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| 26 | import fnmatch |
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| 27 | import itertools |
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| 28 | import pytz |
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| 29 | import re |
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| 30 | from zope.interface import Interface, implements |
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| 31 | from datetime import datetime, timedelta, date, time |
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| 32 | |
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| 33 | # external lib imports |
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| 34 | from simplejson import dumps |
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| 35 | |
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| 36 | # indico imports |
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| 37 | from indico.util.date_time import nowutc |
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| 38 | from indico.util.fossilize import fossilize |
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| 39 | |
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| 40 | from indico.util.metadata import Serializer |
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| 41 | from indico.web.http_api.html import HTML4Serializer |
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| 42 | from indico.web.http_api.jsonp import JSONPSerializer |
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| 43 | from indico.web.http_api.ical import ICalSerializer |
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| 44 | from indico.web.http_api.atom import AtomSerializer |
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| 45 | from indico.web.http_api.fossils import IConferenceMetadataFossil,\ |
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| 46 | IConferenceMetadataWithContribsFossil, IConferenceMetadataWithSubContribsFossil,\ |
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| 47 | IConferenceMetadataWithSessionsFossil, IPeriodFossil |
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| 48 | from indico.web.http_api.responses import HTTPAPIError |
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| 49 | from indico.web.wsgi import webinterface_handler_config as apache |
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| 50 | |
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| 51 | # indico legacy imports |
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| 52 | from MaKaC.common.indexes import IndexesHolder |
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| 53 | from MaKaC.common.info import HelperMaKaCInfo |
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| 54 | from MaKaC.conference import ConferenceHolder |
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| 55 | from MaKaC.plugins.base import PluginsHolder |
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| 56 | from MaKaC.rb_tools import Period, datespan |
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| 57 | |
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| 58 | from indico.web.http_api.util import get_query_parameter, remove_lists |
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| 59 | |
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| 60 | utc = pytz.timezone('UTC') |
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| 61 | MAX_DATETIME = utc.localize(datetime(2099, 12, 31, 23, 59, 0)) |
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| 62 | MIN_DATETIME = utc.localize(datetime(2000, 1, 1)) |
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| 63 | |
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| 64 | class ArgumentParseError(Exception): |
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| 65 | pass |
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| 66 | |
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| 67 | |
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| 68 | class ArgumentValueError(Exception): |
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| 69 | pass |
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| 70 | |
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| 71 | |
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| 72 | class LimitExceededException(Exception): |
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| 73 | pass |
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| 74 | |
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| 75 | |
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| 76 | class Exporter(object): |
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| 77 | EXPORTER_LIST = [] |
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| 78 | TYPES = None # abstract |
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| 79 | RE = None # abstract |
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| 80 | DEFAULT_DETAIL = None # abstract |
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| 81 | MAX_RECORDS = None # abstract |
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| 82 | SERIALIZER_TYPE_MAP = {} |
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| 83 | VALID_FORMATS = None # None = all formats |
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| 84 | GUEST_ALLOWED = True |
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| 85 | |
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| 86 | @classmethod |
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| 87 | def parseRequest(cls, path, qdata): |
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| 88 | """Parse a request path and return an exporter and the requested data type.""" |
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| 89 | exporters = itertools.chain(cls.EXPORTER_LIST, cls._getPluginExporters()) |
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| 90 | for expCls in exporters: |
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| 91 | m = expCls._matchPath(path) |
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| 92 | if m: |
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| 93 | gd = m.groupdict() |
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| 94 | g = m.groups() |
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| 95 | type = g[0] |
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| 96 | format = g[-1] |
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| 97 | if format not in ExportInterface.getAllowedFormats(): |
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| 98 | return None, None |
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| 99 | elif expCls.VALID_FORMATS and format not in expCls.VALID_FORMATS: |
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| 100 | return None, None |
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| 101 | return expCls(qdata, type, gd), format |
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| 102 | return None, None |
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| 103 | |
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| 104 | @staticmethod |
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| 105 | def register(cls): |
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| 106 | """Register an exporter that is not part of a plugin. |
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| 107 | |
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| 108 | To use it, simply decorate the exporter class with this method.""" |
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| 109 | assert cls.RE is not None |
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| 110 | Exporter.EXPORTER_LIST.append(cls) |
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| 111 | return cls |
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| 112 | |
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| 113 | @classmethod |
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| 114 | def _matchPath(cls, path): |
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| 115 | if not hasattr(cls, '_RE'): |
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| 116 | types = '|'.join(cls.TYPES) |
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| 117 | cls._RE = re.compile(r'/export/(' + types + r')/' + cls.RE + r'\.(\w+)$') |
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| 118 | return cls._RE.match(path) |
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| 119 | |
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| 120 | @classmethod |
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| 121 | def _getPluginExporters(cls): |
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| 122 | for plugin in PluginsHolder().getPluginTypes(): |
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| 123 | for expClsName in plugin.getExporterList(): |
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| 124 | yield getattr(plugin.getModule().export, expClsName) |
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| 125 | |
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| 126 | def __init__(self, qdata, type, urlParams): |
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| 127 | self._qdata = qdata |
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| 128 | self._type = type |
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| 129 | self._urlParams = urlParams |
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| 130 | |
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| 131 | def _getParams(self): |
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| 132 | self._offset = get_query_parameter(self._qdata, ['O', 'offset'], 0, integer=True) |
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| 133 | self._orderBy = get_query_parameter(self._qdata, ['o', 'order'], 'start') |
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| 134 | self._descending = get_query_parameter(self._qdata, ['c', 'descending'], False) |
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| 135 | self._detail = get_query_parameter(self._qdata, ['d', 'detail'], self.DEFAULT_DETAIL) |
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| 136 | tzName = get_query_parameter(self._qdata, ['tz'], None) |
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| 137 | |
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| 138 | info = HelperMaKaCInfo.getMaKaCInfoInstance() |
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| 139 | self._serverTZ = info.getTimezone() |
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| 140 | |
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| 141 | if tzName is None: |
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| 142 | tzName = self._serverTZ |
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| 143 | try: |
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| 144 | self._tz = pytz.timezone(tzName) |
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| 145 | except pytz.UnknownTimeZoneError, e: |
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| 146 | raise HTTPAPIError("Bad timezone: '%s'" % e.message, apache.HTTP_BAD_REQUEST) |
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| 147 | max = self.MAX_RECORDS.get(self._detail, 1000) |
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| 148 | self._userLimit = get_query_parameter(self._qdata, ['n', 'limit'], 0, integer=True) |
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| 149 | if self._userLimit > max: |
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| 150 | raise HTTPAPIError("You can only request up to %d records per request with the detail level '%s'" % |
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| 151 | (max, self._detail), apache.HTTP_BAD_REQUEST) |
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| 152 | self._limit = self._userLimit if self._userLimit > 0 else max |
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| 153 | |
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| 154 | def _hasAccess(self, aw): |
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| 155 | return True |
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| 156 | |
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| 157 | def __call__(self, aw): |
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| 158 | """Perform the actual exporting""" |
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| 159 | self._getParams() |
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| 160 | if not self.GUEST_ALLOWED and not aw.getUser(): |
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| 161 | raise HTTPAPIError('Guest access to this exporter is forbidden.', apache.HTTP_FORBIDDEN) |
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| 162 | if not self._hasAccess(aw): |
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| 163 | raise HTTPAPIError('Access to this exporter is restricted.', apache.HTTP_FORBIDDEN) |
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| 164 | resultList = [] |
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| 165 | complete = True |
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| 166 | |
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| 167 | func = getattr(self, 'export_' + self._type, None) |
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| 168 | if not func: |
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| 169 | raise NotImplementedError('export_' + self._type) |
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| 170 | |
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| 171 | try: |
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| 172 | for obj in func(aw): |
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| 173 | resultList.append(obj) |
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| 174 | except LimitExceededException: |
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| 175 | complete = (self._limit == self._userLimit) |
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| 176 | |
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| 177 | return resultList, complete, self.SERIALIZER_TYPE_MAP |
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| 178 | |
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| 179 | |
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| 180 | class ExportInterface(object): |
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| 181 | DETAIL_INTERFACES = {} |
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| 182 | |
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| 183 | _deltas = {'yesterday': timedelta(-1), |
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| 184 | 'tomorrow': timedelta(1)} |
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| 185 | |
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| 186 | _sortingKeys = {'id': lambda x: x.getId(), |
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| 187 | 'end': lambda x: x.getEndDate(), |
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| 188 | 'title': lambda x: x.getTitle()} |
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| 189 | |
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| 190 | def __init__(self, aw, exporter): |
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| 191 | self._aw = aw |
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| 192 | self._tz = exporter._tz |
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| 193 | self._serverTZ = exporter._serverTZ |
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| 194 | self._offset = exporter._offset |
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| 195 | self._limit = exporter._limit |
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| 196 | self._detail = exporter._detail |
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| 197 | self._orderBy = exporter._orderBy |
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| 198 | self._descending = exporter._descending |
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| 199 | |
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| 200 | @classmethod |
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| 201 | def getAllowedFormats(cls): |
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| 202 | return Serializer.getAllFormats() |
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| 203 | |
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| 204 | @classmethod |
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| 205 | def _parseDateTime(cls, dateTime, allowNegativeOffset): |
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| 206 | """ |
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| 207 | Accepted formats: |
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| 208 | * ISO 8601 subset - YYYY-MM-DD[THH:MM] |
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| 209 | * 'today', 'yesterday', 'tomorrow' and 'now' |
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| 210 | * days in the future/past: '[+/-]DdHHhMMm' |
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| 211 | |
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| 212 | 'ctx' means that the date will change according to its function |
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| 213 | ('from' or 'to') |
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| 214 | """ |
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| 215 | |
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| 216 | # if it's a an "alias", return immediately |
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| 217 | now = nowutc() |
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| 218 | if dateTime in cls._deltas: |
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| 219 | return ('ctx', now + cls._deltas[dateTime]) |
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| 220 | elif dateTime == 'now': |
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| 221 | return ('abs', now) |
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| 222 | elif dateTime == 'today': |
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| 223 | return ('ctx', now) |
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| 224 | |
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| 225 | m = re.match(r'^([+-])?(?:(\d{1,3})d)?(?:(\d{1,2})h)?(?:(\d{1,2})m)?$', dateTime) |
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| 226 | if m: |
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| 227 | mod = -1 if m.group(1) == '-' else 1 |
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| 228 | if not allowNegativeOffset and mod == -1: |
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| 229 | raise ArgumentParseError('End date cannot be a negative offset') |
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| 230 | |
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| 231 | atoms = list(0 if a == None else int(a) * mod for a in m.groups()[1:]) |
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| 232 | if atoms[1] > 23 or atoms[2] > 59: |
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| 233 | raise ArgumentParseError("Invalid time!") |
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| 234 | return ('ctx', timedelta(days=atoms[0], hours=atoms[1], minutes=atoms[2])) |
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| 235 | else: |
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| 236 | # iso 8601 subset |
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| 237 | try: |
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| 238 | return ('abs', datetime.strptime(dateTime, "%Y-%m-%dT%H:%M")) |
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| 239 | except ValueError: |
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| 240 | pass |
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| 241 | try: |
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| 242 | return ('ctx', datetime.strptime(dateTime, "%Y-%m-%d")) |
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| 243 | except ValueError: |
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| 244 | raise ArgumentParseError("Impossible to parse '%s'" % dateTime) |
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| 245 | |
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| 246 | @classmethod |
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| 247 | def _getDateTime(cls, ctx, dateTime, tz, aux=None): |
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| 248 | |
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| 249 | try: |
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| 250 | rel, value = cls._parseDateTime(dateTime, ctx=='from') |
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| 251 | except ArgumentParseError, e: |
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| 252 | raise HTTPAPIError(e.message, apache.HTTP_BAD_REQUEST) |
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| 253 | |
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| 254 | if rel == 'abs': |
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| 255 | return tz.localize(value) if not value.tzinfo else value |
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| 256 | elif rel == 'ctx' and type(value) == timedelta: |
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| 257 | if ctx == 'from': |
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| 258 | value = nowutc() + value |
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| 259 | else: |
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| 260 | value = aux + value |
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| 261 | |
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| 262 | # from here on, 'value' has to be a datetime |
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| 263 | if ctx == 'from': |
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| 264 | return tz.localize(value.combine(value.date(), time(0, 0, 0))) |
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| 265 | else: |
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| 266 | return tz.localize(value.combine(value.date(), time(23, 59, 59))) |
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| 267 | |
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| 268 | def _getQueryParams(self, qdata): |
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| 269 | fromDT = get_query_parameter(qdata, ['f', 'from']) |
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| 270 | toDT = get_query_parameter(qdata, ['t', 'to']) |
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| 271 | dayDT = get_query_parameter(qdata, ['day']) |
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| 272 | |
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| 273 | if (fromDT or toDT) and dayDT: |
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| 274 | raise HTTPAPIError("'day' can only be used without 'from' and 'to'", apache.HTTP_BAD_REQUEST) |
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| 275 | elif dayDT: |
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| 276 | fromDT = toDT = dayDT |
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| 277 | |
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| 278 | self._fromDT = ExportInterface._getDateTime('from', fromDT, self._tz) if fromDT else None |
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| 279 | self._toDT = ExportInterface._getDateTime('to', toDT, self._tz, aux=self._fromDT) if toDT else None |
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| 280 | |
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| 281 | def _limitIterator(self, iterator, limit): |
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| 282 | counter = 0 |
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| 283 | # this set acts as a checklist to know if a record has already been sent |
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| 284 | exclude = set() |
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| 285 | self._intermediateResults = [] |
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| 286 | |
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| 287 | for obj in iterator: |
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| 288 | if counter >= limit: |
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| 289 | raise LimitExceededException() |
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| 290 | if obj not in exclude and (not hasattr(obj, 'canAccess') or obj.canAccess(self._aw)): |
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| 291 | self._intermediateResults.append(obj) |
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| 292 | yield obj |
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| 293 | exclude.add(obj) |
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| 294 | counter += 1 |
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| 295 | |
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| 296 | def _sortedIterator(self, iterator, limit, orderBy, descending): |
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| 297 | |
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| 298 | exceeded = False |
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| 299 | if (orderBy and orderBy != 'start') or descending: |
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| 300 | sortingKey = self._sortingKeys.get(orderBy) |
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| 301 | try: |
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| 302 | limitedIterable = sorted(self._limitIterator(iterator, limit), |
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| 303 | key=sortingKey) |
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| 304 | except LimitExceededException: |
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| 305 | exceeded = True |
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| 306 | limitedIterable = sorted(self._intermediateResults, |
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| 307 | key=sortingKey) |
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| 308 | |
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| 309 | if descending: |
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| 310 | limitedIterable.reverse() |
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| 311 | else: |
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| 312 | limitedIterable = self._limitIterator(iterator, limit) |
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| 313 | |
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| 314 | # iterate over result |
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| 315 | for obj in limitedIterable: |
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| 316 | yield obj |
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| 317 | |
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| 318 | # in case the limit was exceeded while sorting the results, |
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| 319 | # raise the exception as if we were truly consuming an iterator |
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| 320 | if orderBy and exceeded: |
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| 321 | raise LimitExceededException() |
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| 322 | |
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| 323 | def _iterateOver(self, iterator, offset, limit, orderBy, descending, filter=None): |
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| 324 | """ |
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| 325 | Iterates over a maximum of `limit` elements, starting at the |
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| 326 | element number `offset`. The elements will be ordered according |
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| 327 | to `orderby` and `descending` (slooooow) and filtered by the |
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| 328 | callable `filter`: |
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| 329 | """ |
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| 330 | |
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| 331 | if filter: |
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| 332 | iterator = itertools.ifilter(filter, iterator) |
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| 333 | # offset + limit because offset records are skipped and do not count |
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| 334 | sortedIterator = self._sortedIterator(iterator, offset + limit, orderBy, descending) |
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| 335 | # Skip offset elements - http://docs.python.org/library/itertools.html#recipes |
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| 336 | next(itertools.islice(sortedIterator, offset, offset), None) |
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| 337 | return sortedIterator |
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| 338 | |
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| 339 | def _postprocess(self, obj, fossil, iface): |
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| 340 | return fossil |
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| 341 | |
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| 342 | def _process(self, iterator, filter=None, iface=None): |
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| 343 | if iface is None: |
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| 344 | iface = self.DETAIL_INTERFACES.get(self._detail) |
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| 345 | if iface is None: |
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| 346 | raise HTTPAPIError('Invalid detail level: %s' % self._detail, apache.HTTP_BAD_REQUEST) |
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| 347 | for obj in self._iterateOver(iterator, self._offset, self._limit, self._orderBy, self._descending, filter): |
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| 348 | yield self._postprocess(obj, fossilize(obj, iface, tz=self._tz, naiveTZ=self._serverTZ), iface) |
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| 349 | |
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| 350 | |
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| 351 | @Exporter.register |
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| 352 | class CategoryEventExporter(Exporter): |
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| 353 | TYPES = ('event', 'categ') |
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| 354 | RE = r'(?P<idlist>\w+(?:-\w+)*)' |
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| 355 | DEFAULT_DETAIL = 'events' |
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| 356 | MAX_RECORDS = { |
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| 357 | 'events': 1000, |
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| 358 | 'contributions': 500, |
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| 359 | 'subcontributions': 500, |
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| 360 | 'sessions': 100, |
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| 361 | } |
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| 362 | |
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| 363 | def _getParams(self): |
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| 364 | super(CategoryEventExporter, self)._getParams() |
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| 365 | self._idList = self._urlParams['idlist'].split('-') |
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| 366 | |
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| 367 | def export_categ(self, aw): |
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| 368 | expInt = CategoryEventExportInterface(aw, self) |
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| 369 | return expInt.category(self._idList, self._qdata) |
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| 370 | |
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| 371 | def export_event(self, aw): |
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| 372 | expInt = CategoryEventExportInterface(aw, self) |
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| 373 | return expInt.event(self._idList, self._qdata) |
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| 374 | |
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| 375 | |
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| 376 | class CategoryEventExportInterface(ExportInterface): |
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| 377 | DETAIL_INTERFACES = { |
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| 378 | 'events': IConferenceMetadataFossil, |
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| 379 | 'contributions': IConferenceMetadataWithContribsFossil, |
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| 380 | 'subcontributions': IConferenceMetadataWithSubContribsFossil, |
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| 381 | 'sessions': IConferenceMetadataWithSessionsFossil |
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| 382 | } |
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| 383 | |
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| 384 | def _getQueryParams(self, qdata): |
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| 385 | super(CategoryEventExportInterface, self)._getQueryParams(qdata) |
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| 386 | self._occurrences = get_query_parameter(qdata, ['occ', 'occurrences'], 'no') == 'yes' |
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| 387 | |
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| 388 | def _postprocess(self, obj, fossil, iface): |
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| 389 | return self._addOccurrences(fossil, obj, self._fromDT, self._toDT) |
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| 390 | |
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| 391 | @staticmethod |
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| 392 | def _eventDaysIterator(conf): |
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| 393 | """ |
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| 394 | Iterates over the daily times of an event |
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| 395 | """ |
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| 396 | sched = conf.getSchedule() |
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| 397 | for day in datespan(conf.getStartDate(), conf.getEndDate()): |
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| 398 | startDT = sched.calculateDayStartDate(day) |
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| 399 | endDT = sched.calculateDayEndDate(day) |
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| 400 | if startDT != endDT: |
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| 401 | yield Period(startDT, endDT) |
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| 402 | |
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| 403 | def _addOccurrences(self, fossil, obj, startDT, endDT): |
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| 404 | if self._occurrences: |
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| 405 | (startDT, endDT) = (startDT or MIN_DATETIME, |
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| 406 | endDT or MAX_DATETIME) |
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| 407 | # get occurrences in the date interval |
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| 408 | fossil['occurrences'] = fossilize(itertools.ifilter( |
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| 409 | lambda x: x.startDT >= startDT and x.endDT <= endDT, self._eventDaysIterator(obj)), |
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| 410 | {Period: IPeriodFossil}, tz=self._tz, naiveTZ=self._serverTZ) |
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| 411 | |
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| 412 | return fossil |
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| 413 | |
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| 414 | def category(self, idlist, qdata): |
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| 415 | self._getQueryParams(qdata) |
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| 416 | location = get_query_parameter(qdata, ['l', 'location']) |
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| 417 | room = get_query_parameter(qdata, ['r', 'room']) |
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| 418 | |
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| 419 | idx = IndexesHolder().getById('categoryDate') |
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| 420 | |
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| 421 | filter = None |
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| 422 | if room or location: |
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| 423 | def filter(obj): |
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| 424 | if location: |
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| 425 | name = obj.getLocation() and obj.getLocation().getName() |
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| 426 | if not name or not fnmatch.fnmatch(name.lower(), location.lower()): |
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| 427 | return False |
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| 428 | if room: |
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| 429 | name = obj.getRoom() and obj.getRoom().getName() |
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| 430 | if not name or not fnmatch.fnmatch(name.lower(), room.lower()): |
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| 431 | return False |
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| 432 | return True |
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| 433 | |
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| 434 | for catId in idlist: |
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| 435 | for obj in self._process(idx.iterateObjectsIn(catId, self._fromDT, self._toDT), filter, IConferenceMetadataFossil): |
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| 436 | yield obj |
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| 437 | |
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| 438 | def event(self, idlist, qdata): |
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| 439 | self._getQueryParams(qdata) |
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| 440 | ch = ConferenceHolder() |
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| 441 | |
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| 442 | def _iterate_objs(objIds): |
|---|
| 443 | for objId in objIds: |
|---|
| 444 | obj = ch.getById(objId, True) |
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| 445 | if obj is not None: |
|---|
| 446 | yield obj |
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| 447 | |
|---|
| 448 | return self._process(_iterate_objs(idlist)) |
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| 449 | |
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| 450 | Serializer.register('html', HTML4Serializer) |
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| 451 | Serializer.register('jsonp', JSONPSerializer) |
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| 452 | Serializer.register('ics', ICalSerializer) |
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| 453 | Serializer.register('atom', AtomSerializer) |
|---|
