閘道器由於是所有外部使用者請求的入口，記錄這些請求中我們需要的元素，對於線上監控以及業務問題定位，是非常重要的。並且，在這些元素中，鏈路資訊也是非常重要的。通過鏈路資訊，我們可以找到請求呼叫全鏈路相關的日誌。並且，閘道器也是大部分請求鏈路起始的地方，記錄請求中的元素的同時，也要帶上鍊路資訊。
我們需要在閘道器記錄每個請求的：
- HTTP 相關元素：
- URL 相關資訊
- 請求資訊，例如 HTTP HEADER，請求時間等等
- 某些型別的請求體
- 響應資訊，例如響應碼
- 某些型別響應的響應體
- 鏈路資訊
現有的可供分析的日誌以及缺陷
首先我們來看 Spring Cloud Gateway 中本身我們可以利用的日誌。Spring Cloud Gateway 基於 Spring-WebFlux，Spring-WebFlux 基於 Project Reactor，我們沒有在閘道器加入額外的 Web 容器依賴，所以 Web 容器用的是預設的基於 Project Reactor 的 reactor-netty 實現的 Web 容器。
netty 抓包日誌
使用了 netty 我們可以聯想到 netty 的抓包日誌，Spring Cloud Gateway 封裝了這個功能，並暴露了配置。Spring Cloud Gateway 是一個閘道器，他會作為 HTTP 伺服器接受 HTTP 請求的同時，還在作為 HTTP 客戶端將請求轉發到下游的微服務。所以，這裡有兩種抓包日誌，一種是作為 HTTP 伺服器接收到的請求和響應，另一種是做為 HTTP 客戶端發出的請求和響應。分別對應兩個配置：
spring.cloud.gateway:
httpserver:
wiretap: true
httpclient:
wiretap: true
經常有讀者私信我問如何看 spring cloud 有哪些配置，官方文件感覺不夠清楚全面。我一般是看原始碼，但是鑑於很多人沒有精力去研究原始碼，一種偷懶的方式是去看 jar 包裡面的 spring-configuration-metadata.json。裡面包含了比較全的配置，以及配置類（如果存在的話），這是很方便的。例如我們這裡的兩個配置，在這個 json 中對應：
{
"name": "spring.cloud.gateway.httpclient.wiretap",
"type": "java.lang.Boolean",
"description": "Enables wiretap debugging for Netty HttpClient.",
"sourceType": "org.springframework.cloud.gateway.config.HttpClientProperties",
"defaultValue": false
},
{
"name": "spring.cloud.gateway.httpserver.wiretap",
"type": "java.lang.Boolean",
"description": "Enables wiretap debugging for Netty HttpServer.",
"defaultValue": "false"
},
可以看出，spring.cloud.gateway.httpclient.wiretap 對應配置類 org.springframework.cloud.gateway.config.HttpClientProperties（這個配置類裡面的配置我們後面還會用到，到時候會詳細分析其中的配置項），預設為 false。spring.cloud.gateway.httpserver.wiretap 沒有配置類，他是被直接使用的，對應原始碼：
@Bean
@ConditionalOnProperty(name = "spring.cloud.gateway.httpserver.wiretap")
public NettyWebServerFactoryCustomizer nettyServerWiretapCustomizer(Environment environment,
ServerProperties serverProperties) {
return new NettyWebServerFactoryCustomizer(environment, serverProperties) {
@Override
public void customize(NettyReactiveWebServerFactory factory) {
factory.addServerCustomizers(httpServer -> httpServer.wiretap(true));
super.customize(factory);
}
};
}
增加這兩個配置為 true 之後，增加日誌輸出配置，我這裡使用的是 log4j2（其實就是設定 reactor.netty.http.server.HttpServer 和 reactor.netty.http.server.HttpClient 的日誌級別為 DEBUG）：
<AsyncLogger name="reactor.netty.http.server.HttpServer" level="debug" additivity="false" includeLocation="true">
<appender-ref ref="console" />
</AsyncLogger>
<AsyncLogger name="reactor.netty.http.client.HttpClient" level="debug" additivity="false" includeLocation="true">
<appender-ref ref="console" />
</AsyncLogger>
然後，再次請求我們前面實現的閘道器，可以看到類似於下面的日誌：
2021-11-27 01:16:06,262 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] READ: 466B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 47 45 54 20 2f 74 65 73 74 2d 73 73 2f 61 6e 79 |GET /test-ss/any|
|00000010| 74 68 69 6e 67 20 48 54 54 50 2f 31 2e 31 0d 0a |thing HTTP/1.1..|
|00000020| 48 6f 73 74 3a 20 31 32 37 2e 30 2e 30 2e 31 3a |Host: 127.0.0.1:|
|00000030| 38 31 38 31 0d 0a 43 6f 6e 6e 65 63 74 69 6f 6e |8181..Connection|
|00000040| 3a 20 6b 65 65 70 2d 61 6c 69 76 65 0d 0a 43 61 |: keep-alive..Ca|
|00000050| 63 68 65 2d 43 6f 6e 74 72 6f 6c 3a 20 6d 61 78 |che-Control: max|
|00000060| 2d 61 67 65 3d 30 0d 0a 55 70 67 72 61 64 65 2d |-age=0..Upgrade-|
|00000070| 49 6e 73 65 63 75 72 65 2d 52 65 71 75 65 73 74 |Insecure-Request|
|00000080| 73 3a 20 31 0d 0a 55 73 65 72 2d 41 67 65 6e 74 |s: 1..User-Agent|
|00000090| 3a 20 4d 6f 7a 69 6c 6c 61 2f 35 2e 30 20 28 57 |: Mozilla/5.0 (W|
|000000a0| 69 6e 64 6f 77 73 20 4e 54 20 31 30 2e 30 3b 20 |indows NT 10.0; |
|000000b0| 57 4f 57 36 34 29 20 41 70 70 6c 65 57 65 62 4b |WOW64) AppleWebK|
|000000c0| 69 74 2f 35 33 37 2e 33 36 20 28 4b 48 54 4d 4c |it/537.36 (KHTML|
|000000d0| 2c 20 6c 69 6b 65 20 47 65 63 6b 6f 29 20 43 68 |, like Gecko) Ch|
|000000e0| 72 6f 6d 65 2f 37 30 2e 30 2e 33 35 33 38 2e 32 |rome/70.0.3538.2|
|000000f0| 35 20 53 61 66 61 72 69 2f 35 33 37 2e 33 36 20 |5 Safari/537.36 |
|00000100| 43 6f 72 65 2f 31 2e 37 30 2e 33 38 37 39 2e 34 |Core/1.70.3879.4|
|00000110| 30 30 20 51 51 42 72 6f 77 73 65 72 2f 31 30 2e |00 QQBrowser/10.|
|00000120| 38 2e 34 35 35 32 2e 34 30 30 0d 0a 41 63 63 65 |8.4552.400..Acce|
|00000130| 70 74 3a 20 74 65 78 74 2f 68 74 6d 6c 2c 61 70 |pt: text/html,ap|
|00000140| 70 6c 69 63 61 74 69 6f 6e 2f 78 68 74 6d 6c 2b |plication/xhtml+|
|00000150| 78 6d 6c 2c 61 70 70 6c 69 63 61 74 69 6f 6e 2f |xml,application/|
|00000160| 78 6d 6c 3b 71 3d 30 2e 39 2c 69 6d 61 67 65 2f |xml;q=0.9,image/|
|00000170| 77 65 62 70 2c 69 6d 61 67 65 2f 61 70 6e 67 2c |webp,image/apng,|
|00000180| 2a 2f 2a 3b 71 3d 30 2e 38 0d 0a 41 63 63 65 70 |*/*;q=0.8..Accep|
|00000190| 74 2d 45 6e 63 6f 64 69 6e 67 3a 20 67 7a 69 70 |t-Encoding: gzip|
|000001a0| 2c 20 64 65 66 6c 61 74 65 2c 20 62 72 0d 0a 41 |, deflate, br..A|
|000001b0| 63 63 65 70 74 2d 4c 61 6e 67 75 61 67 65 3a 20 |ccept-Language: |
|000001c0| 7a 68 2d 43 4e 2c 7a 68 3b 71 3d 30 2e 39 0d 0a |zh-CN,zh;q=0.9..|
|000001d0| 0d 0a |.. |
+--------+-------------------------------------------------+----------------+
2021-11-27 01:16:06,262 DEBUG [sports,,] [10632] [reactor-http-nio-2][reactor.util.Loggers$Slf4JLogger:249]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] Handler is being applied: org.springframework.http.server.reactive.ReactorHttpHandlerAdapter@317ee5cc
2021-11-27 01:16:06,378 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] READ COMPLETE
2021-11-27 01:16:06,381 DEBUG [sports,,] [10632] [reactor-http-nio-6][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:6666c1d1] REGISTERED
2021-11-27 01:16:06,437 DEBUG [sports,,] [10632] [reactor-http-nio-6][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:6666c1d1] CONNECT: httpbin.org/18.232.227.86:80
2021-11-27 01:16:06,656 DEBUG [sports,,] [10632] [reactor-http-nio-6][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:6666c1d1, L:/172.168.160.198:52819 - R:httpbin.org/18.232.227.86:80] ACTIVE
2021-11-27 01:16:06,672 DEBUG [sports,,] [10632] [reactor-http-nio-6][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:6666c1d1-1, L:/172.168.160.198:52819 - R:httpbin.org/18.232.227.86:80] WRITE: 775B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 47 45 54 20 2f 61 6e 79 74 68 69 6e 67 20 48 54 |GET /anything HT|
|00000010| 54 50 2f 31 2e 31 0d 0a 43 61 63 68 65 2d 43 6f |TP/1.1..Cache-Co|
|00000020| 6e 74 72 6f 6c 3a 20 6d 61 78 2d 61 67 65 3d 30 |ntrol: max-age=0|
|00000030| 0d 0a 55 70 67 72 61 64 65 2d 49 6e 73 65 63 75 |..Upgrade-Insecu|
|00000040| 72 65 2d 52 65 71 75 65 73 74 73 3a 20 31 0d 0a |re-Requests: 1..|
|00000050| 55 73 65 72 2d 41 67 65 6e 74 3a 20 4d 6f 7a 69 |User-Agent: Mozi|
|00000060| 6c 6c 61 2f 35 2e 30 20 28 57 69 6e 64 6f 77 73 |lla/5.0 (Windows|
|00000070| 20 4e 54 20 31 30 2e 30 3b 20 57 4f 57 36 34 29 | NT 10.0; WOW64)|
|00000080| 20 41 70 70 6c 65 57 65 62 4b 69 74 2f 35 33 37 | AppleWebKit/537|
|00000090| 2e 33 36 20 28 4b 48 54 4d 4c 2c 20 6c 69 6b 65 |.36 (KHTML, like|
|000000a0| 20 47 65 63 6b 6f 29 20 43 68 72 6f 6d 65 2f 37 | Gecko) Chrome/7|
|000000b0| 30 2e 30 2e 33 35 33 38 2e 32 35 20 53 61 66 61 |0.0.3538.25 Safa|
|000000c0| 72 69 2f 35 33 37 2e 33 36 20 43 6f 72 65 2f 31 |ri/537.36 Core/1|
|000000d0| 2e 37 30 2e 33 38 37 39 2e 34 30 30 20 51 51 42 |.70.3879.400 QQB|
|000000e0| 72 6f 77 73 65 72 2f 31 30 2e 38 2e 34 35 35 32 |rowser/10.8.4552|
|000000f0| 2e 34 30 30 0d 0a 41 63 63 65 70 74 3a 20 74 65 |.400..Accept: te|
|00000100| 78 74 2f 68 74 6d 6c 2c 61 70 70 6c 69 63 61 74 |xt/html,applicat|
|00000110| 69 6f 6e 2f 78 68 74 6d 6c 2b 78 6d 6c 2c 61 70 |ion/xhtml+xml,ap|
|00000120| 70 6c 69 63 61 74 69 6f 6e 2f 78 6d 6c 3b 71 3d |plication/xml;q=|
|00000130| 30 2e 39 2c 69 6d 61 67 65 2f 77 65 62 70 2c 69 |0.9,image/webp,i|
|00000140| 6d 61 67 65 2f 61 70 6e 67 2c 2a 2f 2a 3b 71 3d |mage/apng,*/*;q=|
|00000150| 30 2e 38 0d 0a 41 63 63 65 70 74 2d 45 6e 63 6f |0.8..Accept-Enco|
|00000160| 64 69 6e 67 3a 20 67 7a 69 70 2c 20 64 65 66 6c |ding: gzip, defl|
|00000170| 61 74 65 2c 20 62 72 0d 0a 41 63 63 65 70 74 2d |ate, br..Accept-|
|00000180| 4c 61 6e 67 75 61 67 65 3a 20 7a 68 2d 43 4e 2c |Language: zh-CN,|
|00000190| 7a 68 3b 71 3d 30 2e 39 0d 0a 46 6f 72 77 61 72 |zh;q=0.9..Forwar|
|000001a0| 64 65 64 3a 20 70 72 6f 74 6f 3d 68 74 74 70 3b |ded: proto=http;|
|000001b0| 68 6f 73 74 3d 22 31 32 37 2e 30 2e 30 2e 31 3a |host="127.0.0.1:|
|000001c0| 38 31 38 31 22 3b 66 6f 72 3d 22 31 32 37 2e 30 |8181";for="127.0|
|000001d0| 2e 30 2e 31 3a 35 32 37 39 37 22 0d 0a 58 2d 46 |.0.1:52797"..X-F|
|000001e0| 6f 72 77 61 72 64 65 64 2d 46 6f 72 3a 20 31 32 |orwarded-For: 12|
|000001f0| 37 2e 30 2e 30 2e 31 0d 0a 58 2d 46 6f 72 77 61 |7.0.0.1..X-Forwa|
|00000200| 72 64 65 64 2d 50 72 6f 74 6f 3a 20 68 74 74 70 |rded-Proto: http|
|00000210| 0d 0a 58 2d 46 6f 72 77 61 72 64 65 64 2d 50 72 |..X-Forwarded-Pr|
|00000220| 65 66 69 78 3a 20 2f 74 65 73 74 2d 73 73 0d 0a |efix: /test-ss..|
|00000230| 58 2d 46 6f 72 77 61 72 64 65 64 2d 50 6f 72 74 |X-Forwarded-Port|
|00000240| 3a 20 38 31 38 31 0d 0a 58 2d 46 6f 72 77 61 72 |: 8181..X-Forwar|
|00000250| 64 65 64 2d 48 6f 73 74 3a 20 31 32 37 2e 30 2e |ded-Host: 127.0.|
|00000260| 30 2e 31 3a 38 31 38 31 0d 0a 68 6f 73 74 3a 20 |0.1:8181..host: |
|00000270| 68 74 74 70 62 69 6e 2e 6f 72 67 0d 0a 58 2d 42 |httpbin.org..X-B|
|00000280| 33 2d 54 72 61 63 65 49 64 3a 20 65 66 39 36 35 |3-TraceId: ef965|
|00000290| 33 61 30 30 30 33 65 64 36 38 65 0d 0a 58 2d 42 |3a0003ed68e..X-B|
|000002a0| 33 2d 53 70 61 6e 49 64 3a 20 38 32 62 36 61 30 |3-SpanId: 82b6a0|
|000002b0| 32 30 32 64 63 31 35 36 36 62 0d 0a 58 2d 42 33 |202dc1566b..X-B3|
|000002c0| 2d 50 61 72 65 6e 74 53 70 61 6e 49 64 3a 20 65 |-ParentSpanId: e|
|000002d0| 66 39 36 35 33 61 30 30 30 33 65 64 36 38 65 0d |f9653a0003ed68e.|
|000002e0| 0a 58 2d 42 33 2d 53 61 6d 70 6c 65 64 3a 20 30 |.X-B3-Sampled: 0|
|000002f0| 0d 0a 63 6f 6e 74 65 6e 74 2d 6c 65 6e 67 74 68 |..content-length|
|00000300| 3a 20 30 0d 0a 0d 0a |: 0.... |
+--------+-------------------------------------------------+----------------+
2021-11-27 01:16:06,672 DEBUG [sports,,] [10632] [reactor-http-nio-6][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:6666c1d1-1, L:/172.168.160.198:52819 - R:httpbin.org/18.232.227.86:80] FLUSH
2021-11-27 01:16:06,890 DEBUG [sports,,] [10632] [reactor-http-nio-6][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:6666c1d1-1, L:/172.168.160.198:52819 - R:httpbin.org/18.232.227.86:80] READ: 1315B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 54 54 50 2f 31 2e 31 20 32 30 30 20 4f 4b 0d |HTTP/1.1 200 OK.|
|00000010| 0a 44 61 74 65 3a 20 53 61 74 2c 20 32 37 20 4e |.Date: Sat, 27 N|
|00000020| 6f 76 20 32 30 32 31 20 30 31 3a 31 36 3a 30 34 |ov 2021 01:16:04|
|00000030| 20 47 4d 54 0d 0a 43 6f 6e 74 65 6e 74 2d 54 79 | GMT..Content-Ty|
|00000040| 70 65 3a 20 61 70 70 6c 69 63 61 74 69 6f 6e 2f |pe: application/|
|00000050| 6a 73 6f 6e 0d 0a 43 6f 6e 74 65 6e 74 2d 4c 65 |json..Content-Le|
|00000060| 6e 67 74 68 3a 20 31 30 38 34 0d 0a 43 6f 6e 6e |ngth: 1084..Conn|
|00000070| 65 63 74 69 6f 6e 3a 20 6b 65 65 70 2d 61 6c 69 |ection: keep-ali|
|00000080| 76 65 0d 0a 53 65 72 76 65 72 3a 20 67 75 6e 69 |ve..Server: guni|
|00000090| 63 6f 72 6e 2f 31 39 2e 39 2e 30 0d 0a 41 63 63 |corn/19.9.0..Acc|
|000000a0| 65 73 73 2d 43 6f 6e 74 72 6f 6c 2d 41 6c 6c 6f |ess-Control-Allo|
|000000b0| 77 2d 4f 72 69 67 69 6e 3a 20 2a 0d 0a 41 63 63 |w-Origin: *..Acc|
|000000c0| 65 73 73 2d 43 6f 6e 74 72 6f 6c 2d 41 6c 6c 6f |ess-Control-Allo|
|000000d0| 77 2d 43 72 65 64 65 6e 74 69 61 6c 73 3a 20 74 |w-Credentials: t|
|000000e0| 72 75 65 0d 0a 0d 0a 7b 0a 20 20 22 61 72 67 73 |rue....{. "args|
|000000f0| 22 3a 20 7b 7d 2c 20 0a 20 20 22 64 61 74 61 22 |": {}, . "data"|
|00000100| 3a 20 22 22 2c 20 0a 20 20 22 66 69 6c 65 73 22 |: "", . "files"|
|00000110| 3a 20 7b 7d 2c 20 0a 20 20 22 66 6f 72 6d 22 3a |: {}, . "form":|
|00000120| 20 7b 7d 2c 20 0a 20 20 22 68 65 61 64 65 72 73 | {}, . "headers|
|00000130| 22 3a 20 7b 0a 20 20 20 20 22 41 63 63 65 70 74 |": {. "Accept|
|00000140| 22 3a 20 22 74 65 78 74 2f 68 74 6d 6c 2c 61 70 |": "text/html,ap|
|00000150| 70 6c 69 63 61 74 69 6f 6e 2f 78 68 74 6d 6c 2b |plication/xhtml+|
|00000160| 78 6d 6c 2c 61 70 70 6c 69 63 61 74 69 6f 6e 2f |xml,application/|
|00000170| 78 6d 6c 3b 71 3d 30 2e 39 2c 69 6d 61 67 65 2f |xml;q=0.9,image/|
|00000180| 77 65 62 70 2c 69 6d 61 67 65 2f 61 70 6e 67 2c |webp,image/apng,|
|00000190| 2a 2f 2a 3b 71 3d 30 2e 38 22 2c 20 0a 20 20 20 |*/*;q=0.8", . |
|000001a0| 20 22 41 63 63 65 70 74 2d 45 6e 63 6f 64 69 6e | "Accept-Encodin|
|000001b0| 67 22 3a 20 22 67 7a 69 70 2c 20 64 65 66 6c 61 |g": "gzip, defla|
|000001c0| 74 65 2c 20 62 72 22 2c 20 0a 20 20 20 20 22 41 |te, br", . "A|
|000001d0| 63 63 65 70 74 2d 4c 61 6e 67 75 61 67 65 22 3a |ccept-Language":|
|000001e0| 20 22 7a 68 2d 43 4e 2c 7a 68 3b 71 3d 30 2e 39 | "zh-CN,zh;q=0.9|
|000001f0| 22 2c 20 0a 20 20 20 20 22 43 61 63 68 65 2d 43 |", . "Cache-C|
|00000200| 6f 6e 74 72 6f 6c 22 3a 20 22 6d 61 78 2d 61 67 |ontrol": "max-ag|
|00000210| 65 3d 30 22 2c 20 0a 20 20 20 20 22 43 6f 6e 74 |e=0", . "Cont|
|00000220| 65 6e 74 2d 4c 65 6e 67 74 68 22 3a 20 22 30 22 |ent-Length": "0"|
|00000230| 2c 20 0a 20 20 20 20 22 46 6f 72 77 61 72 64 65 |, . "Forwarde|
|00000240| 64 22 3a 20 22 70 72 6f 74 6f 3d 68 74 74 70 3b |d": "proto=http;|
|00000250| 68 6f 73 74 3d 5c 22 31 32 37 2e 30 2e 30 2e 31 |host=\"127.0.0.1|
|00000260| 3a 38 31 38 31 5c 22 3b 66 6f 72 3d 5c 22 31 32 |:8181\";for=\"12|
|00000270| 37 2e 30 2e 30 2e 31 3a 35 32 37 39 37 5c 22 22 |7.0.0.1:52797\""|
|00000280| 2c 20 0a 20 20 20 20 22 48 6f 73 74 22 3a 20 22 |, . "Host": "|
|00000290| 68 74 74 70 62 69 6e 2e 6f 72 67 22 2c 20 0a 20 |httpbin.org", . |
|000002a0| 20 20 20 22 55 70 67 72 61 64 65 2d 49 6e 73 65 | "Upgrade-Inse|
|000002b0| 63 75 72 65 2d 52 65 71 75 65 73 74 73 22 3a 20 |cure-Requests": |
|000002c0| 22 31 22 2c 20 0a 20 20 20 20 22 55 73 65 72 2d |"1", . "User-|
|000002d0| 41 67 65 6e 74 22 3a 20 22 4d 6f 7a 69 6c 6c 61 |Agent": "Mozilla|
|000002e0| 2f 35 2e 30 20 28 57 69 6e 64 6f 77 73 20 4e 54 |/5.0 (Windows NT|
|000002f0| 20 31 30 2e 30 3b 20 57 4f 57 36 34 29 20 41 70 | 10.0; WOW64) Ap|
|00000300| 70 6c 65 57 65 62 4b 69 74 2f 35 33 37 2e 33 36 |pleWebKit/537.36|
|00000310| 20 28 4b 48 54 4d 4c 2c 20 6c 69 6b 65 20 47 65 | (KHTML, like Ge|
|00000320| 63 6b 6f 29 20 43 68 72 6f 6d 65 2f 37 30 2e 30 |cko) Chrome/70.0|
|00000330| 2e 33 35 33 38 2e 32 35 20 53 61 66 61 72 69 2f |.3538.25 Safari/|
|00000340| 35 33 37 2e 33 36 20 43 6f 72 65 2f 31 2e 37 30 |537.36 Core/1.70|
|00000350| 2e 33 38 37 39 2e 34 30 30 20 51 51 42 72 6f 77 |.3879.400 QQBrow|
|00000360| 73 65 72 2f 31 30 2e 38 2e 34 35 35 32 2e 34 30 |ser/10.8.4552.40|
|00000370| 30 22 2c 20 0a 20 20 20 20 22 58 2d 41 6d 7a 6e |0", . "X-Amzn|
|00000380| 2d 54 72 61 63 65 2d 49 64 22 3a 20 22 52 6f 6f |-Trace-Id": "Roo|
|00000390| 74 3d 31 2d 36 31 61 31 38 36 64 34 2d 34 31 38 |t=1-61a186d4-418|
|000003a0| 32 30 65 31 66 36 33 39 30 32 64 34 64 33 63 63 |20e1f63902d4d3cc|
|000003b0| 64 38 62 39 64 22 2c 20 0a 20 20 20 20 22 58 2d |d8b9d", . "X-|
|000003c0| 42 33 2d 50 61 72 65 6e 74 73 70 61 6e 69 64 22 |B3-Parentspanid"|
|000003d0| 3a 20 22 65 66 39 36 35 33 61 30 30 30 33 65 64 |: "ef9653a0003ed|
|000003e0| 36 38 65 22 2c 20 0a 20 20 20 20 22 58 2d 42 33 |68e", . "X-B3|
|000003f0| 2d 53 61 6d 70 6c 65 64 22 3a 20 22 30 22 2c 20 |-Sampled": "0", |
|00000400| 0a 20 20 20 20 22 58 2d 42 33 2d 53 70 61 6e 69 |. "X-B3-Spani|
|00000410| 64 22 3a 20 22 38 32 62 36 61 30 32 30 32 64 63 |d": "82b6a0202dc|
|00000420| 31 35 36 36 62 22 2c 20 0a 20 20 20 20 22 58 2d |1566b", . "X-|
|00000430| 42 33 2d 54 72 61 63 65 69 64 22 3a 20 22 65 66 |B3-Traceid": "ef|
|00000440| 39 36 35 33 61 30 30 30 33 65 64 36 38 65 22 2c |9653a0003ed68e",|
|00000450| 20 0a 20 20 20 20 22 58 2d 46 6f 72 77 61 72 64 | . "X-Forward|
|00000460| 65 64 2d 48 6f 73 74 22 3a 20 22 31 32 37 2e 30 |ed-Host": "127.0|
|00000470| 2e 30 2e 31 3a 38 31 38 31 22 2c 20 0a 20 20 20 |.0.1:8181", . |
|00000480| 20 22 58 2d 46 6f 72 77 61 72 64 65 64 2d 50 72 | "X-Forwarded-Pr|
|00000490| 65 66 69 78 22 3a 20 22 2f 74 65 73 74 2d 73 73 |efix": "/test-ss|
|000004a0| 22 0a 20 20 7d 2c 20 0a 20 20 22 6a 73 6f 6e 22 |". }, . "json"|
|000004b0| 3a 20 6e 75 6c 6c 2c 20 0a 20 20 22 6d 65 74 68 |: null, . "meth|
|000004c0| 6f 64 22 3a 20 22 47 45 54 22 2c 20 0a 20 20 22 |od": "GET", . "|
|000004d0| 6f 72 69 67 69 6e 22 3a 20 22 31 32 37 2e 30 2e |origin": "127.0.|
|000004e0| 30 2e 31 2c 20 35 39 2e 31 35 32 2e 32 35 34 2e |0.1, 59.152.254.|
|000004f0| 32 33 38 22 2c 20 0a 20 20 22 75 72 6c 22 3a 20 |238", . "url": |
|00000500| 22 68 74 74 70 3a 2f 2f 31 32 37 2e 30 2e 30 2e |"http://127.0.0.|
|00000510| 31 3a 38 31 38 31 2f 61 6e 79 74 68 69 6e 67 22 |1:8181/anything"|
|00000520| 0a 7d 0a |.}. |
+--------+-------------------------------------------------+----------------+
2021-11-27 01:16:06,904 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] WRITE: 207B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 54 54 50 2f 31 2e 31 20 32 30 30 20 4f 4b 0d |HTTP/1.1 200 OK.|
|00000010| 0a 44 61 74 65 3a 20 53 61 74 2c 20 32 37 20 4e |.Date: Sat, 27 N|
|00000020| 6f 76 20 32 30 32 31 20 30 31 3a 31 36 3a 30 34 |ov 2021 01:16:04|
|00000030| 20 47 4d 54 0d 0a 43 6f 6e 74 65 6e 74 2d 54 79 | GMT..Content-Ty|
|00000040| 70 65 3a 20 61 70 70 6c 69 63 61 74 69 6f 6e 2f |pe: application/|
|00000050| 6a 73 6f 6e 0d 0a 53 65 72 76 65 72 3a 20 67 75 |json..Server: gu|
|00000060| 6e 69 63 6f 72 6e 2f 31 39 2e 39 2e 30 0d 0a 41 |nicorn/19.9.0..A|
|00000070| 63 63 65 73 73 2d 43 6f 6e 74 72 6f 6c 2d 41 6c |ccess-Control-Al|
|00000080| 6c 6f 77 2d 4f 72 69 67 69 6e 3a 20 2a 0d 0a 41 |low-Origin: *..A|
|00000090| 63 63 65 73 73 2d 43 6f 6e 74 72 6f 6c 2d 41 6c |ccess-Control-Al|
|000000a0| 6c 6f 77 2d 43 72 65 64 65 6e 74 69 61 6c 73 3a |low-Credentials:|
|000000b0| 20 74 72 75 65 0d 0a 63 6f 6e 74 65 6e 74 2d 6c | true..content-l|
|000000c0| 65 6e 67 74 68 3a 20 31 30 38 34 0d 0a 0d 0a |ength: 1084.... |
+--------+-------------------------------------------------+----------------+
2021-11-27 01:16:06,904 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] FLUSH
2021-11-27 01:16:06,909 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] WRITE: 1084B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 7b 0a 20 20 22 61 72 67 73 22 3a 20 7b 7d 2c 20 |{. "args": {}, |
|00000010| 0a 20 20 22 64 61 74 61 22 3a 20 22 22 2c 20 0a |. "data": "", .|
|00000020| 20 20 22 66 69 6c 65 73 22 3a 20 7b 7d 2c 20 0a | "files": {}, .|
|00000030| 20 20 22 66 6f 72 6d 22 3a 20 7b 7d 2c 20 0a 20 | "form": {}, . |
|00000040| 20 22 68 65 61 64 65 72 73 22 3a 20 7b 0a 20 20 | "headers": {. |
|00000050| 20 20 22 41 63 63 65 70 74 22 3a 20 22 74 65 78 | "Accept": "tex|
|00000060| 74 2f 68 74 6d 6c 2c 61 70 70 6c 69 63 61 74 69 |t/html,applicati|
|00000070| 6f 6e 2f 78 68 74 6d 6c 2b 78 6d 6c 2c 61 70 70 |on/xhtml+xml,app|
|00000080| 6c 69 63 61 74 69 6f 6e 2f 78 6d 6c 3b 71 3d 30 |lication/xml;q=0|
|00000090| 2e 39 2c 69 6d 61 67 65 2f 77 65 62 70 2c 69 6d |.9,image/webp,im|
|000000a0| 61 67 65 2f 61 70 6e 67 2c 2a 2f 2a 3b 71 3d 30 |age/apng,*/*;q=0|
|000000b0| 2e 38 22 2c 20 0a 20 20 20 20 22 41 63 63 65 70 |.8", . "Accep|
|000000c0| 74 2d 45 6e 63 6f 64 69 6e 67 22 3a 20 22 67 7a |t-Encoding": "gz|
|000000d0| 69 70 2c 20 64 65 66 6c 61 74 65 2c 20 62 72 22 |ip, deflate, br"|
|000000e0| 2c 20 0a 20 20 20 20 22 41 63 63 65 70 74 2d 4c |, . "Accept-L|
|000000f0| 61 6e 67 75 61 67 65 22 3a 20 22 7a 68 2d 43 4e |anguage": "zh-CN|
|00000100| 2c 7a 68 3b 71 3d 30 2e 39 22 2c 20 0a 20 20 20 |,zh;q=0.9", . |
|00000110| 20 22 43 61 63 68 65 2d 43 6f 6e 74 72 6f 6c 22 | "Cache-Control"|
|00000120| 3a 20 22 6d 61 78 2d 61 67 65 3d 30 22 2c 20 0a |: "max-age=0", .|
|00000130| 20 20 20 20 22 43 6f 6e 74 65 6e 74 2d 4c 65 6e | "Content-Len|
|00000140| 67 74 68 22 3a 20 22 30 22 2c 20 0a 20 20 20 20 |gth": "0", . |
|00000150| 22 46 6f 72 77 61 72 64 65 64 22 3a 20 22 70 72 |"Forwarded": "pr|
|00000160| 6f 74 6f 3d 68 74 74 70 3b 68 6f 73 74 3d 5c 22 |oto=http;host=\"|
|00000170| 31 32 37 2e 30 2e 30 2e 31 3a 38 31 38 31 5c 22 |127.0.0.1:8181\"|
|00000180| 3b 66 6f 72 3d 5c 22 31 32 37 2e 30 2e 30 2e 31 |;for=\"127.0.0.1|
|00000190| 3a 35 32 37 39 37 5c 22 22 2c 20 0a 20 20 20 20 |:52797\"", . |
|000001a0| 22 48 6f 73 74 22 3a 20 22 68 74 74 70 62 69 6e |"Host": "httpbin|
|000001b0| 2e 6f 72 67 22 2c 20 0a 20 20 20 20 22 55 70 67 |.org", . "Upg|
|000001c0| 72 61 64 65 2d 49 6e 73 65 63 75 72 65 2d 52 65 |rade-Insecure-Re|
|000001d0| 71 75 65 73 74 73 22 3a 20 22 31 22 2c 20 0a 20 |quests": "1", . |
|000001e0| 20 20 20 22 55 73 65 72 2d 41 67 65 6e 74 22 3a | "User-Agent":|
|000001f0| 20 22 4d 6f 7a 69 6c 6c 61 2f 35 2e 30 20 28 57 | "Mozilla/5.0 (W|
|00000200| 69 6e 64 6f 77 73 20 4e 54 20 31 30 2e 30 3b 20 |indows NT 10.0; |
|00000210| 57 4f 57 36 34 29 20 41 70 70 6c 65 57 65 62 4b |WOW64) AppleWebK|
|00000220| 69 74 2f 35 33 37 2e 33 36 20 28 4b 48 54 4d 4c |it/537.36 (KHTML|
|00000230| 2c 20 6c 69 6b 65 20 47 65 63 6b 6f 29 20 43 68 |, like Gecko) Ch|
|00000240| 72 6f 6d 65 2f 37 30 2e 30 2e 33 35 33 38 2e 32 |rome/70.0.3538.2|
|00000250| 35 20 53 61 66 61 72 69 2f 35 33 37 2e 33 36 20 |5 Safari/537.36 |
|00000260| 43 6f 72 65 2f 31 2e 37 30 2e 33 38 37 39 2e 34 |Core/1.70.3879.4|
|00000270| 30 30 20 51 51 42 72 6f 77 73 65 72 2f 31 30 2e |00 QQBrowser/10.|
|00000280| 38 2e 34 35 35 32 2e 34 30 30 22 2c 20 0a 20 20 |8.4552.400", . |
|00000290| 20 20 22 58 2d 41 6d 7a 6e 2d 54 72 61 63 65 2d | "X-Amzn-Trace-|
|000002a0| 49 64 22 3a 20 22 52 6f 6f 74 3d 31 2d 36 31 61 |Id": "Root=1-61a|
|000002b0| 31 38 36 64 34 2d 34 31 38 32 30 65 31 66 36 33 |186d4-41820e1f63|
|000002c0| 39 30 32 64 34 64 33 63 63 64 38 62 39 64 22 2c |902d4d3ccd8b9d",|
|000002d0| 20 0a 20 20 20 20 22 58 2d 42 33 2d 50 61 72 65 | . "X-B3-Pare|
|000002e0| 6e 74 73 70 61 6e 69 64 22 3a 20 22 65 66 39 36 |ntspanid": "ef96|
|000002f0| 35 33 61 30 30 30 33 65 64 36 38 65 22 2c 20 0a |53a0003ed68e", .|
|00000300| 20 20 20 20 22 58 2d 42 33 2d 53 61 6d 70 6c 65 | "X-B3-Sample|
|00000310| 64 22 3a 20 22 30 22 2c 20 0a 20 20 20 20 22 58 |d": "0", . "X|
|00000320| 2d 42 33 2d 53 70 61 6e 69 64 22 3a 20 22 38 32 |-B3-Spanid": "82|
|00000330| 62 36 61 30 32 30 32 64 63 31 35 36 36 62 22 2c |b6a0202dc1566b",|
|00000340| 20 0a 20 20 20 20 22 58 2d 42 33 2d 54 72 61 63 | . "X-B3-Trac|
|00000350| 65 69 64 22 3a 20 22 65 66 39 36 35 33 61 30 30 |eid": "ef9653a00|
|00000360| 30 33 65 64 36 38 65 22 2c 20 0a 20 20 20 20 22 |03ed68e", . "|
|00000370| 58 2d 46 6f 72 77 61 72 64 65 64 2d 48 6f 73 74 |X-Forwarded-Host|
|00000380| 22 3a 20 22 31 32 37 2e 30 2e 30 2e 31 3a 38 31 |": "127.0.0.1:81|
|00000390| 38 31 22 2c 20 0a 20 20 20 20 22 58 2d 46 6f 72 |81", . "X-For|
|000003a0| 77 61 72 64 65 64 2d 50 72 65 66 69 78 22 3a 20 |warded-Prefix": |
|000003b0| 22 2f 74 65 73 74 2d 73 73 22 0a 20 20 7d 2c 20 |"/test-ss". }, |
|000003c0| 0a 20 20 22 6a 73 6f 6e 22 3a 20 6e 75 6c 6c 2c |. "json": null,|
|000003d0| 20 0a 20 20 22 6d 65 74 68 6f 64 22 3a 20 22 47 | . "method": "G|
|000003e0| 45 54 22 2c 20 0a 20 20 22 6f 72 69 67 69 6e 22 |ET", . "origin"|
|000003f0| 3a 20 22 31 32 37 2e 30 2e 30 2e 31 2c 20 35 39 |: "127.0.0.1, 59|
|00000400| 2e 31 35 32 2e 32 35 34 2e 32 33 38 22 2c 20 0a |.152.254.238", .|
|00000410| 20 20 22 75 72 6c 22 3a 20 22 68 74 74 70 3a 2f | "url": "http:/|
|00000420| 2f 31 32 37 2e 30 2e 30 2e 31 3a 38 31 38 31 2f |/127.0.0.1:8181/|
|00000430| 61 6e 79 74 68 69 6e 67 22 0a 7d 0a |anything".}. |
+--------+-------------------------------------------------+----------------+
2021-11-27 01:16:06,909 DEBUG [sports,,] [10632] [reactor-http-nio-6][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:6666c1d1, L:/172.168.160.198:52819 - R:httpbin.org/18.232.227.86:80] READ COMPLETE
2021-11-27 01:16:06,910 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] FLUSH
2021-11-27 01:16:06,910 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] WRITE: 0B
2021-11-27 01:16:06,910 DEBUG [sports,,] [10632] [reactor-http-nio-2][io.netty.util.internal.logging.AbstractInternalLogger:145]:[id:1277d54e-2, L:/127.0.0.1:8181 - R:/127.0.0.1:52797] FLUSH
可以從日誌中看出下面比較重要的資訊：
- 從抓包日誌從可以得出 HTTP 請求與響應包中的所有內容。
- 這裡的日誌，由於沒被 spring-cloud-sleuth 包裝，所以日誌本身的佔位符沒有相關鏈路資訊
- 但是從包中，可以看到 spring-cloud-sleuth 的鏈路資訊，這裡是:
"X-B3-Parentspanid": "ef9653a0003ed68e", "X-B3-Sampled": "0", "X-B3-Spanid": "82b6a0202dc1566b", "X-B3-Traceid": "ef9653a0003ed68e", - netty 本身有 traceId，即這裡的
6666c1d1和1277d54e(分別是作為 HttpServer 接受請求和作為 HttpClient 轉發請求後臺微服務)，這樣其實就可以將 spring-cloud-sleuth 的鏈路資訊與 netty 的鏈路資訊結合在一起
這些日誌很全面，但是有下面一些不好用的問題：
- 只能輸出所有請求響應的包內容，並不能定製輸出哪些內容。例如對於檔案上傳請求，我們其實並不想看他的請求體，但是這裡無法定製化。
- 日誌太多了，會影響我們的效能。
HttpWebHandlerAdapter 的 TRACE 日誌
在系列前面文章的原始碼分析中，我們知道在入口的 HttpWebHandlerAdapter 中有請求與響應日誌，可以通過下面的配置進行啟用：
<AsyncLogger name="org.springframework.web.server.adapter.HttpWebHandlerAdapter" level="trace" additivity="false" includeLocation="true">
<appender-ref ref="console" />
</AsyncLogger>
這樣就能啟用類似於下面的日誌：
2021-11-27 01:25:28,472 TRACE [sports,,] [16188] [reactor-http-nio-2][org.springframework.core.log.LogFormatUtils:88]:[8d5138d1-3] HTTP GET "/test-ss/anything", headers={masked}
2021-11-27 01:25:28,696 TRACE [sports,,] [16188] [reactor-http-nio-2][org.springframework.core.log.LogFormatUtils:88]:[8d5138d1-3] Completed 200 OK, headers={masked}
如何讓 headers 不要被掩碼，可以通過下面的配置實現：
spring.codec:
log-request-details: true
這個配置對應的配置類是：CodecProperties，通過原始碼我們也可以發現，我們還可以在這裡限制 body 的大小：
@ConfigurationProperties(prefix = "spring.codec")
public class CodecProperties {
private boolean logRequestDetails;
private DataSize maxInMemorySize;
}
加上配置後，日誌如下：
2021-11-27 01:32:50,501 TRACE [sports,,] [17668] [reactor-http-nio-2][org.springframework.core.log.LogFormatUtils:88]:[ecf9f55a-1] HTTP GET "/test-ss/anything", headers=[Host:"127.0.0.1:8181", Connection:"keep-alive", Cache-Control:"max-age=0", Upgrade-Insecure-Requests:"1", User-Agent:"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.25 Safari/537.36 Core/1.70.3879.400 QQBrowser/10.8.4552.400", Accept:"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8", Accept-Encoding:"gzip, deflate, br", Accept-Language:"zh-CN,zh;q=0.9"]
2021-11-27 01:32:51,212 TRACE [sports,,] [17668] [reactor-http-nio-2][org.springframework.core.log.LogFormatUtils:88]:[ecf9f55a-1] Completed 200 OK, headers=[Date:"Sat, 27 Nov 2021 01:32:48 GMT", Content-Type:"application/json", Server:"gunicorn/19.9.0", Access-Control-Allow-Origin:"*", Access-Control-Allow-Credentials:"true", content-length:"1084"]
但是這個日誌內容太少，只包含請求和響應頭，並且沒有 spring-cloud-sleuth 相關的鏈路資訊。
AccessLog
Spring Cloud Gateway 使用基於 reactor-netty 的 http 伺服器，在 spring-boot 的封裝中，可以通過新增 NettyServerCustomizer Bean 來實現新增自定義 AccessLog。AccessLog 包含的元素有：
public interface AccessLogArgProvider {
@Nullable
@Deprecated
String zonedDateTime();
@Nullable
ZonedDateTime accessDateTime();
@Nullable
SocketAddress remoteAddress();
@Nullable
CharSequence method();
@Nullable
CharSequence uri();
@Nullable
String protocol();
@Nullable
String user();
@Nullable
CharSequence status();
long contentLength();
long duration();
@Nullable
CharSequence requestHeader(CharSequence name);
@Nullable
CharSequence responseHeader(CharSequence name);
@Nullable
Map<CharSequence, Set<Cookie>> cookies();
}
可以看出裡面沒有 spring cloud sleuth 相關的鏈路資訊，但是我們可以通過實現 Global Filter 將鏈路資訊加入 Response 的 Header 中，並且通過 AccessLogArgProvider 的 requestHeader 將這些 Header 輸出到 accesslog：
package com.github.jojotech.spring.cloud.apigateway.filter;
import java.util.List;
import lombok.extern.log4j.Log4j2;
import reactor.core.publisher.Mono;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.cloud.sleuth.Span;
import org.springframework.cloud.sleuth.TraceContext;
import org.springframework.cloud.sleuth.Tracer;
import org.springframework.core.Ordered;
import org.springframework.http.HttpHeaders;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
@Log4j2
@Component
public class CommonTraceFilter implements GlobalFilter, Ordered {
public static final String TRACE_ID = "traceId";
public static final String SPAN_ID = "spanId";
@Autowired
private Tracer tracer;
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
Span span = tracer.currentSpan();
if (span == null) {
span = tracer.nextSpan();
}
TraceContext context = span.context();
ServerHttpResponse response = exchange.getResponse();
HttpHeaders headers = response.getHeaders();
headers.put(TRACE_ID, List.of(context.traceId()));
headers.put(SPAN_ID, List.of(context.spanId()));
return chain.filter(exchange);
}
@Override
public int getOrder() {
//需要在所有的 Filter 之前，拿到 trace 資訊
return Ordered.HIGHEST_PRECEDENCE;
}
}
然後，通過實現 NettyServerCustomizer 註冊一個 Bean 來配置 Access Log。
package com.github.jojotech.spring.cloud.apigateway.filter;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import reactor.netty.http.server.HttpServer;
import reactor.netty.http.server.logging.AccessLog;
import reactor.netty.http.server.logging.AccessLogFactory;
import reactor.util.annotation.Nullable;
import org.springframework.boot.web.embedded.netty.NettyServerCustomizer;
import org.springframework.stereotype.Component;
@Component
public class AccessLogNettyServerCustomizer implements NettyServerCustomizer {
static final String DEFAULT_LOG_FORMAT =
"{},{} -> {} - {} [{}] \"{} {} {}\" {} {} {} ms";
static final String MISSING = "-";
@Override
public HttpServer apply(HttpServer httpServer) {
httpServer = httpServer.accessLog(true, AccessLogFactory.createFilter(
accessLogArgProvider -> {
//所有的都列印
return true;
}, accessLogArgProvider -> {
return AccessLog.create(DEFAULT_LOG_FORMAT, accessLogArgProvider
.responseHeader(CommonTraceFilter.TRACE_ID) == null ? MISSING : accessLogArgProvider
.responseHeader(CommonTraceFilter.TRACE_ID), accessLogArgProvider
.responseHeader(CommonTraceFilter.SPAN_ID) == null ? MISSING : accessLogArgProvider
.responseHeader(CommonTraceFilter.SPAN_ID), applyAddress(accessLogArgProvider
.remoteAddress()), accessLogArgProvider.user(),
accessLogArgProvider.zonedDateTime(), accessLogArgProvider.method(), accessLogArgProvider
.uri(), accessLogArgProvider.protocol(), accessLogArgProvider.status(),
accessLogArgProvider.contentLength() > -1 ? accessLogArgProvider
.contentLength() : MISSING, accessLogArgProvider.duration());
})
);
return httpServer;
}
static String applyAddress(@Nullable SocketAddress socketAddress) {
if (socketAddress instanceof InetSocketAddress) {
InetSocketAddress inetSocketAddress = (InetSocketAddress) socketAddress;
return inetSocketAddress.getHostString() + ":" + inetSocketAddress.getPort();
}
else {
return MISSING;
}
}
}
這樣，我們就可以得到像下面的 access log：
2021-11-27 03:56:10,948 INFO [sports,,] [8536] [reactor-http-nio-2][reactor.util.Loggers$Slf4JLogger:269]:baa69b779a8497eb,baa69b779a8497eb -> 127.0.0.1:64196 - - [2021-11-27T03:56:10.720844200Z[Etc/GMT]] "GET /test-ss/anything HTTP/1.1" 200 1084 228 ms
accesslog 的也不能輸出 body，所以我們還是需要定製自己的日誌 Filter。
我們在下一節，會開始實現我們自己定製的日誌 Filter
微信搜尋“我的程式設計喵”關注公眾號，每日一刷，輕鬆提升技術，斬獲各種offer：
