# 统计引用站点、IP 地址或匹配的规则
<a name="query-examples-waf-logs-count"></a>

本部分中的示例查询相关日志项的计数。
+ [Count the number of referrers that contain a specified term](#waf-example-count-referrers-with-specified-term)
+ [Count all matched IP addresses in the last 10 days that have matched excluded rules](#waf-example-count-matched-ip-addresses)
+ [Group all counted managed rules by the number of times matched](#waf-example-group-managed-rules-by-times-matched)
+ [Group all counted custom rules by number of times matched](#waf-example-group-custom-rules-by-times-matched)

**Example – 统计包含指定术语的引用站点数量**  
以下查询计算指定日期范围内包含“amazon”一词的引用者数量。  

```
WITH test_dataset AS 
  (SELECT header FROM waf_logs
    CROSS JOIN UNNEST(httprequest.headers) AS t(header) WHERE "date" >= '2021/03/01'
    AND "date" < '2021/03/31')
SELECT COUNT(*) referer_count 
FROM test_dataset 
WHERE LOWER(header.name)='referer' AND header.value LIKE '%amazon%'
```

**Example – 统计过去 10 天内与排除规则匹配的所有匹配 IP 地址**  
以下查询计算过去 10 天内 IP 地址与规则组中排除规则匹配的次数。  

```
WITH test_dataset AS 
  (SELECT * FROM waf_logs 
    CROSS JOIN UNNEST(rulegrouplist) AS t(allrulegroups))
SELECT 
  COUNT(*) AS count, 
  "httprequest"."clientip", 
  "allrulegroups"."excludedrules",
  "allrulegroups"."ruleGroupId"
FROM test_dataset 
WHERE allrulegroups.excludedrules IS NOT NULL AND from_unixtime(timestamp/1000) > now() - interval '10' day
GROUP BY "httprequest"."clientip", "allrulegroups"."ruleGroupId", "allrulegroups"."excludedrules"
ORDER BY count DESC
```

**Example - 按匹配次数对所有已计数的托管规则进行分组**  
如果您在 2022 年 10 月 27 日之前在 Web ACL 配置中将规则组规则操作设置为“计数”，AWS WAF 在 Web ACL JSON 中将覆盖内容保存为 `excludedRules`。现在，用于将规则替换为“计数”的 JSON 设置位于 `ruleActionOverrides` 设置中。有关更多信息，请参阅《AWS WAF 开发人员指南》**中的[规则组中的操作覆盖](https://docs.aws.amazon.com/waf/latest/developerguide/web-acl-rule-group-override-options.html)。要从新的日志结构中提取计数模式下的托管规则，请在 `ruleGroupList` 部分而不是 `excludedRules` 字段中查询 `nonTerminatingMatchingRules`，如下例所示。  

```
SELECT
 count(*) AS count,
 httpsourceid,
 httprequest.clientip,
 t.rulegroupid, 
 t.nonTerminatingMatchingRules
FROM "waf_logs" 
CROSS JOIN UNNEST(rulegrouplist) AS t(t) 
WHERE action <> 'BLOCK' AND cardinality(t.nonTerminatingMatchingRules) > 0 
GROUP BY t.nonTerminatingMatchingRules, action, httpsourceid, httprequest.clientip, t.rulegroupid 
ORDER BY "count" DESC 
Limit 50
```

**Example - 按匹配次数对所有已计数的自定义规则进行分组**  
以下查询按匹配次数对所有已计数的自定义规则进行分组。  

```
SELECT
  count(*) AS count,
         httpsourceid,
         httprequest.clientip,
         t.ruleid,
         t.action
FROM "waf_logs" 
CROSS JOIN UNNEST(nonterminatingmatchingrules) AS t(t) 
WHERE action <> 'BLOCK' AND cardinality(nonTerminatingMatchingRules) > 0 
GROUP BY t.ruleid, t.action, httpsourceid, httprequest.clientip 
ORDER BY "count" DESC
Limit 50
```

有关自定义规则和托管规则组的日志位置的信息，请参阅《AWS WAF 开发人员指南》**中的[监控和调整](https://docs.aws.amazon.com/waf/latest/developerguide/web-acl-testing-activities.html)。