Http Access Log

[Denis Rossi]

Hi,

I'm implementing an HTTP server with netty 4.1.6.Final, and I would like to implement an access log.
This is what I would like to do, considering that I'm trying to never call writeAndFlush but just write and flush is called only when a read complete event has been fired:

1. get the start time before the the message is decoded to an HttpRequest (before the HTTP codec)
2. get method, protocol, uri, x-forwarded-for and x-forwarded-proto headers immediately after the message has been decoded in a HTTP request
   
3. get response status and content length when I write the HTTP response
4. get the response time when I flush

The problem I'm facing is that I cannot keep trace of all those informations as channel attributes cause a read operation could happen before the flush is called.

Even if I try to keep those information grouped by a messageId set at the very first read, I cannot know, when I flush, to which original message I'm responding.

Does it makes sense? Am I approaching the problem in a wrong way?

Thanks for helping.

Regards,

Denis Rossi

[俞超]

hi, Denis, try this to see if follows could help you ^^

in Handler which extends HTTP codec

1. generate a messageId and record startTime and something others in a data struct in this channel attr or in a global data struct

2. decode a http request

3. put the messageId in http request headers

in HttpRequestHandler

1. pull the messageId in httpRequest header

2. record something with messageId

3. do business

4.

response.headers().set(CONNECTION, KEEP_ALIVE);

ctx.write(response).addListener(new GenericFutureListener<Future<? super Void>>() {

    // this method is called after flush() method

    @Override

    public void operationComplete(Future<? super Void> future) throws Exception {

        future.isSuccess();

        // do something with messageId

    }

});

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