How to use the oss2.exceptions function in oss2

def test_crypto_init_multipart_invalid_part_size(self):
        crypto_bucket = random.choice([self.rsa_crypto_bucket, self.kms_crypto_bucket])
        key = self.random_key()

        data_size = 1024 * 100
        part_size = random.randint(1, 15) + 1024 * 100
        context = models.MultipartUploadCryptoContext(data_size, part_size)

        # not align to block_size
        self.assertRaises(oss2.exceptions.ClientError, crypto_bucket.init_multipart_upload, key, upload_context=context)

        # part size is small than 100*1024
        part_size = random.randint(1, 1024 * 100 - 1)
        context.part_size = part_size
        self.assertRaises(oss2.exceptions.ClientError, crypto_bucket.init_multipart_upload, key, upload_context=context)

def test_get_object_to_file_incomplete_download(self):
        file_size = 123 * 3 + 1
        key, filename, content = self.__prepare(self.bucket, file_size)

        with patch.object(oss2.Bucket, 'get_object',
                          side_effect=partial(mock_get_object, content_length=file_size),
                          autospec=True):
            try:
                self.bucket.get_object_to_file(key, filename)
            except oss2.exceptions.InconsistentError as e:
                self.assertTrue(e.request_id)
                self.assertEqual(e.body, 'InconsistentError: IncompleteRead from source')
            except:
                self.assertTrue(False)

def test_make_exception(self):
        body = 'bad body'
        e = make_exception(self.__fake_response(400, body))
        self.assertTrue(isinstance(e, oss2.exceptions.ServerError))
        self.assertEqual(e.status, 400)
        self.assertEqual(e.body, oss2.to_bytes(body))

        body = '<code>NoSuchKey</code>中文和控制字符'
        e = make_exception(self.__fake_response(404, body))
        self.assertTrue(isinstance(e, oss2.exceptions.NoSuchKey))
        self.assertEqual(e.status, 404)
        self.assertEqual(e.code, 'NoSuchKey')

def oss_check(self, bucket_name, default_endpoint, access_key_id, access_key_secret):
        if bucket_name in self.bucket_endpoints:
            endpoint = self.bucket_endpoints[bucket_name]
            try:
                bucket = oss2.Bucket(oss2.Auth(access_key_id, access_key_secret), endpoint, bucket_name, connect_timeout=5.0, app_name=defaults.app_name)
                res = bucket.get_bucket_acl()
            except oss2.exceptions.OssError as e:
                raise AuthenticationFailed("access bucket:%s using specified \
                        endpoint:%s failed. request_id:%s, status:%s, code:%s, message:%s" % (bucket_name, endpoint, e.request_id, unicode(e.status), e.code, e.message))
            return endpoint 
        try:
            service = oss2.Service(oss2.Auth(access_key_id, access_key_secret), default_endpoint, app_name=defaults.app_name)
            res = service.list_buckets(prefix=bucket_name)
        except oss2.exceptions.AccessDenied as e:
            raise AuthenticationFailed("can't list buckets, check your access_key.request_id:%s, status:%s, code:%s, message:%s"% (e.request_id, unicode(e.status), e.code, e.message))
        except oss2.exceptions.OssError as e:
            raise AuthenticationFailed("list buckets error. request_id:%s, status:%s, code:%s, message:%s" % (e.request_id, unicode(e.status), e.code, e.message))

        bucket_list = res.buckets
        for bucket in bucket_list:
            if bucket.name == bucket_name:
                endpoint = self.get_endpoint(bucket_name, bucket.location.decode('utf-8'), access_key_id, access_key_secret)
                return endpoint
        raise AuthenticationFailed("can't find the bucket %s when list buckets." % bucket_name)

def getObj(self,filename,record_date):
        '''获取str对象'''
        try:
            object_stream = self.bucket.get_object('%s/%s/%s'%(self.base_dir,record_date,filename))
            #print('[Success] Get obj success!')
            return object_stream.read().decode()
        except oss2.exceptions.NoSuchKey as e:
            return json.dumps({'0.0029790401458740234':'[Error] OSS录像文件不存在!'})
        except oss2.exceptions.ServerError as e:
            return json.dumps({'0.0029790401458740234':'[Error] 请检查[KEY][SECRET][存储桶]是否正确!'})
        except oss2.exceptions.AccessDenied as e:
            return json.dumps({'0.0029790401458740234':'[Error] 操作拒绝,请检查key是否有权限上传!'})
        except Exception as e:
            return json.dumps({'0.0029790401458740234':'[Error]--->%s'%e})

def bucket_exists(self):
        import oss2
        try:
            self.bucket.get_bucket_acl()
            return True
        except oss2.exceptions.NoSuchBucket:
            return False

def _query(self, filename):
        """Get the file size"""
        import oss2
        key_name = self.key_prefix + filename
        try:
            file_size = self.bucket.get_object_meta(key_name).content_length
        except oss2.exceptions.NoSuchKey :
            file_size = -1
        return {'size': file_size}

def getObj(self,filename,record_date):
        '''获取str对象'''
        try:
            object_stream = self.bucket.get_object('%s/%s/%s'%(self.base_dir,record_date,filename))
            #print('[Success] Get obj success!')
            return object_stream.read().decode()
        except oss2.exceptions.NoSuchKey as e:
            return json.dumps({'0.0029790401458740234':'[Error] OSS录像文件不存在!'})
        except oss2.exceptions.ServerError as e:
            return json.dumps({'0.0029790401458740234':'[Error] 请检查[KEY][SECRET][存储桶]是否正确!'})
        except oss2.exceptions.AccessDenied as e:
            return json.dumps({'0.0029790401458740234':'[Error] 操作拒绝,请检查key是否有权限上传!'})
        except Exception as e:
            return json.dumps({'0.0029790401458740234':'[Error]--->%s'%e})

def getObj(self,filename,record_date):
        '''获取str对象'''
        try:
            object_stream = self.bucket.get_object('%s/%s/%s'%(self.base_dir,record_date,filename))
            #print('[Success] Get obj success!')
            return object_stream.read().decode()
        except oss2.exceptions.NoSuchKey as e:
            return json.dumps({'0.0029790401458740234':'[Error] OSS录像文件不存在!'})
        except oss2.exceptions.ServerError as e:
            return json.dumps({'0.0029790401458740234':'[Error] 请检查[KEY][SECRET][存储桶]是否正确!'})
        except oss2.exceptions.AccessDenied as e:
            return json.dumps({'0.0029790401458740234':'[Error] 操作拒绝,请检查key是否有权限上传!'})
        except Exception as e:
            return json.dumps({'0.0029790401458740234':'[Error]--->%s'%e})