+++ /dev/null
-#!/usr/bin/env python
-
-""" redis.py - A client for the Redis daemon.
-
-History:
-
- - 20090603 fix missing errno import, add sunion and sunionstore commands,
- generalize shebang (Jochen Kupperschmidt)
-
-"""
-
-__author__ = "Ludovico Magnocavallo <ludo\x40qix\x2eit>"
-__copyright__ = "Copyright 2009, Ludovico Magnocavallo"
-__license__ = "MIT"
-__version__ = "0.5"
-__revision__ = "$LastChangedRevision: 175 $"[22:-2]
-__date__ = "$LastChangedDate: 2009-03-17 16:15:55 +0100 (Mar, 17 Mar 2009) $"[18:-2]
-
-
-# TODO: Redis._get_multi_response
-
-
-import socket
-import decimal
-import errno
-
-
-BUFSIZE = 4096
-
-
-class RedisError(Exception): pass
-class ConnectionError(RedisError): pass
-class ResponseError(RedisError): pass
-class InvalidResponse(RedisError): pass
-class InvalidData(RedisError): pass
-
-
-class Redis(object):
- """The main Redis client.
- """
-
- def __init__(self, host=None, port=None, timeout=None, db=None, nodelay=None, charset='utf8', errors='strict'):
- self.host = host or 'localhost'
- self.port = port or 6379
- if timeout:
- socket.setdefaulttimeout(timeout)
- self.nodelay = nodelay
- self.charset = charset
- self.errors = errors
- self._sock = None
- self._fp = None
- self.db = db
-
- def _encode(self, s):
- if isinstance(s, str):
- return s
- if isinstance(s, unicode):
- try:
- return s.encode(self.charset, self.errors)
- except UnicodeEncodeError, e:
- raise InvalidData("Error encoding unicode value '%s': %s" % (value.encode(self.charset, 'replace'), e))
- return str(s)
-
- def _write(self, s):
- """
- >>> r = Redis(db=9)
- >>> r.connect()
- >>> r._sock.close()
- >>> try:
- ... r._write('pippo')
- ... except ConnectionError, e:
- ... print e
- Error 9 while writing to socket. Bad file descriptor.
- >>>
- >>>
- """
- try:
- self._sock.sendall(s)
- except socket.error, e:
- if e.args[0] == 32:
- # broken pipe
- self.disconnect()
- raise ConnectionError("Error %s while writing to socket. %s." % tuple(e.args))
-
- def _read(self):
- try:
- return self._fp.readline()
- except socket.error, e:
- if e.args and e.args[0] == errno.EAGAIN:
- return
- self.disconnect()
- raise ConnectionError("Error %s while reading from socket. %s." % tuple(e.args))
- if not data:
- self.disconnect()
- raise ConnectionError("Socket connection closed when reading.")
- return data
-
- def ping(self):
- """
- >>> r = Redis(db=9)
- >>> r.ping()
- 'PONG'
- >>>
- """
- self.connect()
- self._write('PING\r\n')
- return self.get_response()
-
- def set(self, name, value, preserve=False, getset=False):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 'pippo')
- 'OK'
- >>> r.set('a', u'pippo \u3235')
- 'OK'
- >>> r.get('a')
- u'pippo \u3235'
- >>> r.set('b', 105.2)
- 'OK'
- >>> r.set('b', 'xxx', preserve=True)
- 0
- >>> r.get('b')
- Decimal("105.2")
- >>>
- """
- self.connect()
- # the following will raise an error for unicode values that can't be encoded to ascii
- # we could probably add an 'encoding' arg to init, but then what do we do with get()?
- # convert back to unicode? and what about ints, or pickled values?
- if getset: command = 'GETSET'
- elif preserve: command = 'SETNX'
- else: command = 'SET'
- value = self._encode(value)
- self._write('%s %s %s\r\n%s\r\n' % (
- command, name, len(value), value
- ))
- return self.get_response()
-
- def get(self, name):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 'pippo'), r.set('b', 15), r.set('c', ' \\r\\naaa\\nbbb\\r\\ncccc\\nddd\\r\\n '), r.set('d', '\\r\\n')
- ('OK', 'OK', 'OK', 'OK')
- >>> r.get('a')
- u'pippo'
- >>> r.get('b')
- 15
- >>> r.get('d')
- u'\\r\\n'
- >>> r.get('b')
- 15
- >>> r.get('c')
- u' \\r\\naaa\\nbbb\\r\\ncccc\\nddd\\r\\n '
- >>> r.get('c')
- u' \\r\\naaa\\nbbb\\r\\ncccc\\nddd\\r\\n '
- >>> r.get('ajhsd')
- >>>
- """
- self.connect()
- self._write('GET %s\r\n' % name)
- return self.get_response()
-
- def getset(self, name, value):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 'pippo')
- 'OK'
- >>> r.getset('a', 2)
- u'pippo'
- >>>
- """
- return self.set(name, value, getset=True)
-
- def mget(self, *args):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 'pippo'), r.set('b', 15), r.set('c', '\\r\\naaa\\nbbb\\r\\ncccc\\nddd\\r\\n'), r.set('d', '\\r\\n')
- ('OK', 'OK', 'OK', 'OK')
- >>> r.mget('a', 'b', 'c', 'd')
- [u'pippo', 15, u'\\r\\naaa\\nbbb\\r\\ncccc\\nddd\\r\\n', u'\\r\\n']
- >>>
- """
- self.connect()
- self._write('MGET %s\r\n' % ' '.join(args))
- return self.get_response()
-
- def incr(self, name, amount=1):
- """
- >>> r = Redis(db=9)
- >>> r.delete('a')
- 1
- >>> r.incr('a')
- 1
- >>> r.incr('a')
- 2
- >>> r.incr('a', 2)
- 4
- >>>
- """
- self.connect()
- if amount == 1:
- self._write('INCR %s\r\n' % name)
- else:
- self._write('INCRBY %s %s\r\n' % (name, amount))
- return self.get_response()
-
- def decr(self, name, amount=1):
- """
- >>> r = Redis(db=9)
- >>> if r.get('a'):
- ... r.delete('a')
- ... else:
- ... print 1
- 1
- >>> r.decr('a')
- -1
- >>> r.decr('a')
- -2
- >>> r.decr('a', 5)
- -7
- >>>
- """
- self.connect()
- if amount == 1:
- self._write('DECR %s\r\n' % name)
- else:
- self._write('DECRBY %s %s\r\n' % (name, amount))
- return self.get_response()
-
- def exists(self, name):
- """
- >>> r = Redis(db=9)
- >>> r.exists('dsjhfksjdhfkdsjfh')
- 0
- >>> r.set('a', 'a')
- 'OK'
- >>> r.exists('a')
- 1
- >>>
- """
- self.connect()
- self._write('EXISTS %s\r\n' % name)
- return self.get_response()
-
- def delete(self, name):
- """
- >>> r = Redis(db=9)
- >>> r.delete('dsjhfksjdhfkdsjfh')
- 0
- >>> r.set('a', 'a')
- 'OK'
- >>> r.delete('a')
- 1
- >>> r.exists('a')
- 0
- >>> r.delete('a')
- 0
- >>>
- """
- self.connect()
- self._write('DEL %s\r\n' % name)
- return self.get_response()
-
- def get_type(self, name):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 3)
- 'OK'
- >>> r.get_type('a')
- 'string'
- >>> r.get_type('zzz')
- >>>
- """
- self.connect()
- self._write('TYPE %s\r\n' % name)
- res = self.get_response()
- return None if res == 'none' else res
-
- def keys(self, pattern):
- """
- >>> r = Redis(db=9)
- >>> r.flush()
- 'OK'
- >>> r.set('a', 'a')
- 'OK'
- >>> r.keys('a*')
- [u'a']
- >>> r.set('a2', 'a')
- 'OK'
- >>> r.keys('a*')
- [u'a', u'a2']
- >>> r.delete('a2')
- 1
- >>> r.keys('sjdfhskjh*')
- []
- >>>
- """
- self.connect()
- self._write('KEYS %s\r\n' % pattern)
- return self.get_response().split()
-
- def randomkey(self):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 'a')
- 'OK'
- >>> isinstance(r.randomkey(), str)
- True
- >>>
- """
- #raise NotImplementedError("Implemented but buggy, do not use.")
- self.connect()
- self._write('RANDOMKEY\r\n')
- return self.get_response()
-
- def rename(self, src, dst, preserve=False):
- """
- >>> r = Redis(db=9)
- >>> try:
- ... r.rename('a', 'a')
- ... except ResponseError, e:
- ... print e
- source and destination objects are the same
- >>> r.rename('a', 'b')
- 'OK'
- >>> try:
- ... r.rename('a', 'b')
- ... except ResponseError, e:
- ... print e
- no such key
- >>> r.set('a', 1)
- 'OK'
- >>> r.rename('b', 'a', preserve=True)
- 0
- >>>
- """
- self.connect()
- if preserve:
- self._write('RENAMENX %s %s\r\n' % (src, dst))
- return self.get_response()
- else:
- self._write('RENAME %s %s\r\n' % (src, dst))
- return self.get_response() #.strip()
-
- def dbsize(self):
- """
- >>> r = Redis(db=9)
- >>> type(r.dbsize())
- <type 'int'>
- >>>
- """
- self.connect()
- self._write('DBSIZE\r\n')
- return self.get_response()
-
- def ttl(self, name):
- """
- >>> r = Redis(db=9)
- >>> r.ttl('a')
- -1
- >>> r.expire('a', 10)
- 1
- >>> r.ttl('a')
- 10
- >>> r.expire('a', 0)
- 0
- >>>
- """
- self.connect()
- self._write('TTL %s\r\n' % name)
- return self.get_response()
-
- def expire(self, name, time):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 1)
- 'OK'
- >>> r.expire('a', 1)
- 1
- >>> r.expire('zzzzz', 1)
- 0
- >>>
- """
- self.connect()
- self._write('EXPIRE %s %s\r\n' % (name, time))
- return self.get_response()
-
- def push(self, name, value, tail=False):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> r.push('l', 'a')
- 'OK'
- >>> r.set('a', 'a')
- 'OK'
- >>> try:
- ... r.push('a', 'a')
- ... except ResponseError, e:
- ... print e
- Operation against a key holding the wrong kind of value
- >>>
- """
- self.connect()
- value = self._encode(value)
- self._write('%s %s %s\r\n%s\r\n' % (
- 'LPUSH' if tail else 'RPUSH', name, len(value), value
- ))
- return self.get_response()
-
- def llen(self, name):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> r.push('l', 'a')
- 'OK'
- >>> r.llen('l')
- 1
- >>> r.push('l', 'a')
- 'OK'
- >>> r.llen('l')
- 2
- >>>
- """
- self.connect()
- self._write('LLEN %s\r\n' % name)
- return self.get_response()
-
- def lrange(self, name, start, end):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> r.lrange('l', 0, 1)
- []
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.lrange('l', 0, 1)
- [u'aaa']
- >>> r.push('l', 'bbb')
- 'OK'
- >>> r.lrange('l', 0, 0)
- [u'aaa']
- >>> r.lrange('l', 0, 1)
- [u'aaa', u'bbb']
- >>> r.lrange('l', -1, 0)
- []
- >>> r.lrange('l', -1, -1)
- [u'bbb']
- >>>
- """
- self.connect()
- self._write('LRANGE %s %s %s\r\n' % (name, start, end))
- return self.get_response()
-
- def ltrim(self, name, start, end):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> try:
- ... r.ltrim('l', 0, 1)
- ... except ResponseError, e:
- ... print e
- no such key
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.push('l', 'bbb')
- 'OK'
- >>> r.push('l', 'ccc')
- 'OK'
- >>> r.ltrim('l', 0, 1)
- 'OK'
- >>> r.llen('l')
- 2
- >>> r.ltrim('l', 99, 95)
- 'OK'
- >>> r.llen('l')
- 0
- >>>
- """
- self.connect()
- self._write('LTRIM %s %s %s\r\n' % (name, start, end))
- return self.get_response()
-
- def lindex(self, name, index):
- """
- >>> r = Redis(db=9)
- >>> res = r.delete('l')
- >>> r.lindex('l', 0)
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.lindex('l', 0)
- u'aaa'
- >>> r.lindex('l', 2)
- >>> r.push('l', 'ccc')
- 'OK'
- >>> r.lindex('l', 1)
- u'ccc'
- >>> r.lindex('l', -1)
- u'ccc'
- >>>
- """
- self.connect()
- self._write('LINDEX %s %s\r\n' % (name, index))
- return self.get_response()
-
- def pop(self, name, tail=False):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> r.pop('l')
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.push('l', 'bbb')
- 'OK'
- >>> r.pop('l')
- u'aaa'
- >>> r.pop('l')
- u'bbb'
- >>> r.pop('l')
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.push('l', 'bbb')
- 'OK'
- >>> r.pop('l', tail=True)
- u'bbb'
- >>> r.pop('l')
- u'aaa'
- >>> r.pop('l')
- >>>
- """
- self.connect()
- self._write('%s %s\r\n' % ('RPOP' if tail else 'LPOP', name))
- return self.get_response()
-
- def lset(self, name, index, value):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> try:
- ... r.lset('l', 0, 'a')
- ... except ResponseError, e:
- ... print e
- no such key
- >>> r.push('l', 'aaa')
- 'OK'
- >>> try:
- ... r.lset('l', 1, 'a')
- ... except ResponseError, e:
- ... print e
- index out of range
- >>> r.lset('l', 0, 'bbb')
- 'OK'
- >>> r.lrange('l', 0, 1)
- [u'bbb']
- >>>
- """
- self.connect()
- value = self._encode(value)
- self._write('LSET %s %s %s\r\n%s\r\n' % (
- name, index, len(value), value
- ))
- return self.get_response()
-
- def lrem(self, name, value, num=0):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.push('l', 'bbb')
- 'OK'
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.lrem('l', 'aaa')
- 2
- >>> r.lrange('l', 0, 10)
- [u'bbb']
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.lrem('l', 'aaa', 1)
- 1
- >>> r.lrem('l', 'aaa', 1)
- 1
- >>> r.lrem('l', 'aaa', 1)
- 0
- >>>
- """
- self.connect()
- value = self._encode(value)
- self._write('LREM %s %s %s\r\n%s\r\n' % (
- name, num, len(value), value
- ))
- return self.get_response()
-
- def sort(self, name, by=None, get=None, start=None, num=None, desc=False, alpha=False):
- """
- >>> r = Redis(db=9)
- >>> r.delete('l')
- 1
- >>> r.push('l', 'ccc')
- 'OK'
- >>> r.push('l', 'aaa')
- 'OK'
- >>> r.push('l', 'ddd')
- 'OK'
- >>> r.push('l', 'bbb')
- 'OK'
- >>> r.sort('l', alpha=True)
- [u'aaa', u'bbb', u'ccc', u'ddd']
- >>> r.delete('l')
- 1
- >>> for i in range(1, 5):
- ... res = r.push('l', 1.0 / i)
- >>> r.sort('l')
- [Decimal("0.25"), Decimal("0.333333333333"), Decimal("0.5"), Decimal("1.0")]
- >>> r.sort('l', desc=True)
- [Decimal("1.0"), Decimal("0.5"), Decimal("0.333333333333"), Decimal("0.25")]
- >>> r.sort('l', desc=True, start=2, num=1)
- [Decimal("0.333333333333")]
- >>> r.set('weight_0.5', 10)
- 'OK'
- >>> r.sort('l', desc=True, by='weight_*')
- [Decimal("0.5"), Decimal("1.0"), Decimal("0.333333333333"), Decimal("0.25")]
- >>> for i in r.sort('l', desc=True):
- ... res = r.set('test_%s' % i, 100 - float(i))
- >>> r.sort('l', desc=True, get='test_*')
- [Decimal("99.0"), Decimal("99.5"), Decimal("99.6666666667"), Decimal("99.75")]
- >>> r.sort('l', desc=True, by='weight_*', get='test_*')
- [Decimal("99.5"), Decimal("99.0"), Decimal("99.6666666667"), Decimal("99.75")]
- >>> r.sort('l', desc=True, by='weight_*', get='missing_*')
- [None, None, None, None]
- >>>
- """
- stmt = ['SORT', name]
- if by:
- stmt.append("BY %s" % by)
- if start and num:
- stmt.append("LIMIT %s %s" % (start, num))
- if get is None:
- pass
- elif isinstance(get, basestring):
- stmt.append("GET %s" % get)
- elif isinstance(get, list) or isinstance(get, tuple):
- for g in get:
- stmt.append("GET %s" % g)
- else:
- raise RedisError("Invalid parameter 'get' for Redis sort")
- if desc:
- stmt.append("DESC")
- if alpha:
- stmt.append("ALPHA")
- self.connect()
- self._write(' '.join(stmt + ["\r\n"]))
- return self.get_response()
-
- def sadd(self, name, value):
- """
- >>> r = Redis(db=9)
- >>> res = r.delete('s')
- >>> r.sadd('s', 'a')
- 1
- >>> r.sadd('s', 'b')
- 1
- >>>
- """
- self.connect()
- value = self._encode(value)
- self._write('SADD %s %s\r\n%s\r\n' % (
- name, len(value), value
- ))
- return self.get_response()
-
- def srem(self, name, value):
- """
- >>> r = Redis(db=9)
- >>> r.delete('s')
- 1
- >>> r.srem('s', 'aaa')
- 0
- >>> r.sadd('s', 'b')
- 1
- >>> r.srem('s', 'b')
- 1
- >>> r.sismember('s', 'b')
- 0
- >>>
- """
- self.connect()
- value = self._encode(value)
- self._write('SREM %s %s\r\n%s\r\n' % (
- name, len(value), value
- ))
- return self.get_response()
-
- def sismember(self, name, value):
- """
- >>> r = Redis(db=9)
- >>> r.delete('s')
- 1
- >>> r.sismember('s', 'b')
- 0
- >>> r.sadd('s', 'a')
- 1
- >>> r.sismember('s', 'b')
- 0
- >>> r.sismember('s', 'a')
- 1
- >>>
- """
- self.connect()
- value = self._encode(value)
- self._write('SISMEMBER %s %s\r\n%s\r\n' % (
- name, len(value), value
- ))
- return self.get_response()
-
- def sinter(self, *args):
- """
- >>> r = Redis(db=9)
- >>> res = r.delete('s1')
- >>> res = r.delete('s2')
- >>> res = r.delete('s3')
- >>> r.sadd('s1', 'a')
- 1
- >>> r.sadd('s2', 'a')
- 1
- >>> r.sadd('s3', 'b')
- 1
- >>> try:
- ... r.sinter()
- ... except ResponseError, e:
- ... print e
- wrong number of arguments
- >>> try:
- ... r.sinter('l')
- ... except ResponseError, e:
- ... print e
- Operation against a key holding the wrong kind of value
- >>> r.sinter('s1', 's2', 's3')
- set([])
- >>> r.sinter('s1', 's2')
- set([u'a'])
- >>>
- """
- self.connect()
- self._write('SINTER %s\r\n' % ' '.join(args))
- return set(self.get_response())
-
- def sinterstore(self, dest, *args):
- """
- >>> r = Redis(db=9)
- >>> res = r.delete('s1')
- >>> res = r.delete('s2')
- >>> res = r.delete('s3')
- >>> r.sadd('s1', 'a')
- 1
- >>> r.sadd('s2', 'a')
- 1
- >>> r.sadd('s3', 'b')
- 1
- >>> r.sinterstore('s_s', 's1', 's2', 's3')
- 0
- >>> r.sinterstore('s_s', 's1', 's2')
- 1
- >>> r.smembers('s_s')
- set([u'a'])
- >>>
- """
- self.connect()
- self._write('SINTERSTORE %s %s\r\n' % (dest, ' '.join(args)))
- return self.get_response()
-
- def smembers(self, name):
- """
- >>> r = Redis(db=9)
- >>> r.delete('s')
- 1
- >>> r.sadd('s', 'a')
- 1
- >>> r.sadd('s', 'b')
- 1
- >>> try:
- ... r.smembers('l')
- ... except ResponseError, e:
- ... print e
- Operation against a key holding the wrong kind of value
- >>> r.smembers('s')
- set([u'a', u'b'])
- >>>
- """
- self.connect()
- self._write('SMEMBERS %s\r\n' % name)
- return set(self.get_response())
-
- def sunion(self, *args):
- """
- >>> r = Redis(db=9)
- >>> res = r.delete('s1')
- >>> res = r.delete('s2')
- >>> res = r.delete('s3')
- >>> r.sadd('s1', 'a')
- 1
- >>> r.sadd('s2', 'a')
- 1
- >>> r.sadd('s3', 'b')
- 1
- >>> r.sunion('s1', 's2', 's3')
- set([u'a', u'b'])
- >>> r.sadd('s2', 'c')
- 1
- >>> r.sunion('s1', 's2', 's3')
- set([u'a', u'c', u'b'])
- >>>
- """
- self.connect()
- self._write('SUNION %s\r\n' % ' '.join(args))
- return set(self.get_response())
-
- def sunionstore(self, dest, *args):
- """
- >>> r = Redis(db=9)
- >>> res = r.delete('s1')
- >>> res = r.delete('s2')
- >>> res = r.delete('s3')
- >>> r.sadd('s1', 'a')
- 1
- >>> r.sadd('s2', 'a')
- 1
- >>> r.sadd('s3', 'b')
- 1
- >>> r.sunionstore('s4', 's1', 's2', 's3')
- 2
- >>> r.smembers('s4')
- set([u'a', u'b'])
- >>>
- """
- self.connect()
- self._write('SUNIONSTORE %s %s\r\n' % (dest, ' '.join(args)))
- return self.get_response()
-
- def select(self, db):
- """
- >>> r = Redis(db=9)
- >>> r.delete('a')
- 1
- >>> r.select(10)
- 'OK'
- >>> r.set('a', 1)
- 'OK'
- >>> r.select(9)
- 'OK'
- >>> r.get('a')
- >>>
- """
- self.connect()
- self._write('SELECT %s\r\n' % db)
- return self.get_response()
-
- def move(self, name, db):
- """
- >>> r = Redis(db=9)
- >>> r.set('a', 'a')
- 'OK'
- >>> r.select(10)
- 'OK'
- >>> if r.get('a'):
- ... r.delete('a')
- ... else:
- ... print 1
- 1
- >>> r.select(9)
- 'OK'
- >>> r.move('a', 10)
- 1
- >>> r.get('a')
- >>> r.select(10)
- 'OK'
- >>> r.get('a')
- u'a'
- >>> r.select(9)
- 'OK'
- >>>
- """
- self.connect()
- self._write('MOVE %s %s\r\n' % (name, db))
- return self.get_response()
-
- def save(self, background=False):
- """
- >>> r = Redis(db=9)
- >>> r.save()
- 'OK'
- >>> try:
- ... resp = r.save(background=True)
- ... except ResponseError, e:
- ... assert str(e) == 'background save already in progress', str(e)
- ... else:
- ... assert resp == 'OK'
- >>>
- """
- self.connect()
- if background:
- self._write('BGSAVE\r\n')
- else:
- self._write('SAVE\r\n')
- return self.get_response()
-
- def lastsave(self):
- """
- >>> import time
- >>> r = Redis(db=9)
- >>> t = int(time.time())
- >>> r.save()
- 'OK'
- >>> r.lastsave() >= t
- True
- >>>
- """
- self.connect()
- self._write('LASTSAVE\r\n')
- return self.get_response()
-
- def flush(self, all_dbs=False):
- """
- >>> r = Redis(db=9)
- >>> r.flush()
- 'OK'
- >>> # r.flush(all_dbs=True)
- >>>
- """
- self.connect()
- self._write('%s\r\n' % ('FLUSHALL' if all_dbs else 'FLUSHDB'))
- return self.get_response()
-
- def info(self):
- """
- >>> r = Redis(db=9)
- >>> info = r.info()
- >>> info and isinstance(info, dict)
- True
- >>> isinstance(info.get('connected_clients'), int)
- True
- >>>
- """
- self.connect()
- self._write('INFO\r\n')
- info = dict()
- for l in self.get_response().split('\r\n'):
- if not l:
- continue
- k, v = l.split(':', 1)
- info[k] = int(v) if v.isdigit() else v
- return info
-
- def auth(self, passwd):
- self.connect()
- self._write('AUTH %s\r\n' % passwd)
- return self.get_response()
-
- def get_response(self):
- data = self._read().strip()
- if not data:
- self.disconnect()
- raise ConnectionError("Socket closed on remote end")
- c = data[0]
- if c == '-':
- raise ResponseError(data[5:] if data[:5] == '-ERR ' else data[1:])
- if c == '+':
- return data[1:]
- if c == '*':
- try:
- num = int(data[1:])
- except (TypeError, ValueError):
- raise InvalidResponse("Cannot convert multi-response header '%s' to integer" % data)
- result = list()
- for i in range(num):
- result.append(self._get_value())
- return result
- return self._get_value(data)
-
- def _get_value(self, data=None):
- data = data or self._read().strip()
- if data == '$-1':
- return None
- try:
- c, i = data[0], (int(data[1:]) if data.find('.') == -1 else float(data[1:]))
- except ValueError:
- raise InvalidResponse("Cannot convert data '%s' to integer" % data)
- if c == ':':
- return i
- if c != '$':
- raise InvalidResponse("Unkown response prefix for '%s'" % data)
- buf = []
- while True:
- data = self._read()
- i -= len(data)
- buf.append(data)
- if i < 0:
- break
- data = ''.join(buf)[:-2]
- try:
- return int(data) if data.find('.') == -1 else decimal.Decimal(data)
- except (ValueError, decimal.InvalidOperation):
- return data.decode(self.charset)
-
- def disconnect(self):
- if isinstance(self._sock, socket.socket):
- try:
- self._sock.close()
- except socket.error:
- pass
- self._sock = None
- self._fp = None
-
- def connect(self):
- """
- >>> r = Redis(db=9)
- >>> r.connect()
- >>> isinstance(r._sock, socket.socket)
- True
- >>> r.disconnect()
- >>>
- """
- if isinstance(self._sock, socket.socket):
- return
- try:
- sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
- sock.connect((self.host, self.port))
- except socket.error, e:
- raise ConnectionError("Error %s connecting to %s:%s. %s." % (e.args[0], self.host, self.port, e.args[1]))
- else:
- self._sock = sock
- self._fp = self._sock.makefile('r')
- if self.db:
- self.select(self.db)
- if self.nodelay is not None:
- self._sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, self.nodelay)
-
-
-if __name__ == '__main__':
- import doctest
- doctest.testmod()
-
projects / redis.git / blobdiff