78
81
return date, message_dict
84
def _utc_datetime(dt):
85
return dt.astimezone(dateutil.tz.tzutc())
88
def _utc_timestamp(dt):
89
return time.mktime(_utc_datetime(dt).timetuple()) - time.timezone
92
def _utc_timeuuid(dt, lowest_val=True):
93
return convert_time_to_uuid(_utc_timestamp(dt), lowest_val)
96
def _cmp_timeuuid(a, b):
98
return cmp(a.time, b.time)
102
def _bound_timeuuid(a, b, max=False):
103
if a == '' or _cmp_timeuuid(b, a) == (1 if max else -1):
108
def _make_bounds(memo, range_start, range_finish, backward):
111
memo = uuid.UUID(memo)
116
if range_start is not None:
117
start = _bound_timeuuid(
118
start, _utc_timeuuid(range_start), max=True)
119
if range_finish is not None:
120
finish = _bound_timeuuid(
121
finish, _utc_timeuuid(range_finish, lowest_val=False))
122
return memo, start, finish
125
LEGAL_HEADERS = set([
126
'date', 'from', 'subject', 'message-id',
130
def _format_message(message, headers=[], include_raw=False):
134
assert not set(headers).difference(LEGAL_HEADERS)
136
for header in headers:
137
hdict[header] = message.get(header)
138
data['headers'] = hdict
141
data['raw'] = message['raw']
81
146
class CassandraConnection(object):
83
148
def __init__(self, keyspace, host):
96
161
def add_message(self, archive_uuid, message):
97
162
message_uuid = uuid.uuid4()
98
163
message_date, message_dict = _parse_message(message)
99
message_dict['content'] = message
164
message_dict['raw'] = message
100
165
message_dict['date_created'] = (
101
166
datetime.datetime.utcnow().isoformat() + 'Z')
102
167
self.messages.insert(message_uuid, message_dict)
103
168
self.archive_messages.insert(
105
{message_date.astimezone(dateutil.tz.tzutc()): message_uuid})
170
{_utc_timestamp(message_date): message_uuid})
107
172
'Imported %s into %s'
108
173
% (message_dict.get('message-id', None), archive_uuid))
109
174
return message_uuid
111
def _format_message(self, message):
113
'date': message.get('date'),
114
'from': message.get('from'),
115
'subject': message.get('subject'),
118
def get_messages(self, archive_uuid, order, count, start):
176
def _trim(self, sequence, end):
177
"""Return the sequence with one of the ends trimmed.
179
:param end: if true, remove the last element. otherwise remove
187
def get_messages(self, archive_uuid, order, count, memo, backward=False,
188
start_date=None, finish_date=None, format='all',
189
headers=['from', 'date', 'subject', 'message-id']):
119
190
if order in ("date", "-date"):
120
191
reversed = order[0] == '-'
122
193
raise AssertionError("Unsupported order.")
195
memo, start, finish = _make_bounds(
196
memo, start_date, finish_date, backward)
198
# Get up to n+1 messages from the memo: the last item of the
199
# previous batch (because that's where the memo starts) + this
123
201
pairs = self.archive_messages.get(
124
archive_uuid, column_count=count + 1,
125
column_start=start, column_reversed=reversed).items()
202
archive_uuid, column_count=count + 1, column_start=start,
203
column_finish=finish, column_reversed=reversed).items()
205
if len(pairs) and memo and pairs[0][0] <= memo:
206
# The memo (from the previous batch) was included in the result.
208
pairs = self._trim(pairs, False ^ backward)
209
elif len(pairs) > count:
210
# There was no memo in the result, so the n+1th element is
211
# unnecessary. Kill it.
212
pairs = self._trim(pairs, True ^ backward)
215
return (None, [], None)
217
assert 0 < len(pairs) <= count
219
# We've narrowed down the message references. Fetch the messages.
126
220
ids = [v for k, v in pairs]
127
messages = self.messages.multiget(
128
ids, columns=['date', 'from', 'subject'])
129
actual_count = len(pairs)
130
if len(pairs) > count:
131
assert len(pairs) == count + 1
133
next_memo = str(pairs[count][0])
221
formatter = functools.partial(
222
_format_message, headers=headers, include_raw=True)
223
# XXX: No need to get all columns. Restrict based on format.
224
messages = self.messages.multiget(ids)
137
[self._format_message(messages[id]) for id in ids[:actual_count]],
228
[formatter(messages[id]) for id in ids],