nginx：当使用nginx作为反向代理时，是否可能捕获访问日志中的响应头？ [英] nginx: Is it possible to capture response headers in access log when using nginx as a reverse proxy?

问题描述

我们使用nginx作为反向代理来控制和日志访问Clojure（Java）Web服务应用程序。

We are using nginx as a reverse proxy to control and log access to a Clojure (Java) web service application.

我们能够生成一个 access_log 并使用nginx捕获传入的头部很好。我们的Clojure应用程序通过log4j记录活动。麻烦的是，我们不能匹配 access_log 中的条目到应用程序生成的条目。

We are able to generate an access_log and capture incoming headers using nginx just fine. Our Clojure app logs activity via log4j. Trouble is, is that we can't match an entry in the access_log to an entry generated by the app.

应用程序通过发送响应标头以及正文来响应访问。我们可以随意改变这些响应头。我最初的想法是生成对应于每个Web服务请求的UUID，并将其发送回用户在回复标头 X-Uuid 中。我的想法是，我可以通过创建一个自定义 log_format 捕获此响应：

The app responds to access by sending response headers as well as a body. We can freely change these response headers. My initial thought was to generate a UUID that corresponds to each and every web service request and send that back to the user within the reply header X-Uuid. My thought was that I could capture this response by creating a custom log_format:

log_format lt-custom '$remote_addr - $remote_user [$time_local]  '
                     '"$request" $status $body_bytes_sent '
                     '"$http_referer" "$http_user_agent" $request_time $http_x_uuid';

看起来像nginx可以捕获入站请求中的头，但不是出站应答（我通过替换 $ http_x_uuid 与 $ http_content_type ）。

It's looking like nginx can capture headers in incoming requests but not outgoing replies (I verified this by replacing $http_x_uuid with $http_content_type).

有没有办法我可以通过捕获发出回复头使用nginx绑定我的 access_log enties和我的log4j条目？有更好的方法吗？

So! Is there a way I can tie my access_log enties and my log4j entries by capturing outgoing reply headers using nginx? Is there a better way? I'd rather not have to rely on users generating their own UUIDs.

非常感谢！

推荐答案

$ http_x_uuid是客户端发送的头。
上游发送的响应头为$ upstream_http_x_uuid

$http_x_uuid is header sent by client. Response header send by upstream is $upstream_http_x_uuid

http://wiki.nginx.org/HttpUpstreamModule#.24upstream_http_.24HEADER

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