Apache access log not logging content-length for data served via PHP

Asked Dec 28 '20 at 23:52

Active Dec 29 '20 at 01:32

Viewed 319 times

I have a php script that handles files downloads, it sends content-length header properly and the browsers receive it. But in the Apache access log they show up as "-". In the past this used to work, the bytes showed up on the log, but this is no longer the case.

PHP Script Requests Web Browser -> Nginx -> Apache -> PHP-FPM https://serverpilot.io/docs/how-serverpilot-configures-your-lamp-stack/

Log entry, where "-" is %b (the file size in bytes)

218.200.***.*** - - [29/Dec/2020:00:49:02 +0100] "GET /dll.php?file=File.zip&key=109237902 HTTP/1.0" 200 -

Worth noting that if the file is downloaded directly, then the size is logged.

EDIT: Log format:

LogFormat "%a %l %u %t \"%r\" %>s %b" common

edited Dec 29 '20 at 01:32

asked Dec 28 '20 at 23:52

Michael Rogers

Please show an example log entry demonstrating the problem. – Michael Hampton Dec 28 '20 at 23:56
Added. Thanks for looking into this. – Michael Rogers Dec 29 '20 at 00:03
Well that's interesting. That doesn't look like a normal Apache log entry. Did you define a custom log format? Please show that as well. – Michael Hampton Dec 29 '20 at 00:10
It's what serverpilot uses as logformat added above. – Michael Rogers Dec 29 '20 at 00:22
Added how the server is configured Web Browser -> Nginx -> Apache -> PHP-FPM – Michael Rogers Dec 29 '20 at 01:32
You won't get size in Apache logs since PHP-FPM takes over the request and Apache doesn't download anything in fact. Not sure if changing PHP-FPM from Unix socket to TCP socket or vice versa changes the situation. – Hardoman Dec 29 '20 at 14:55
I see. i got some values changing log format from %b to %O http://httpd.apache.org/docs/current/mod/mod_logio.html I don't know how accurate that is. Do you have a link on how to change socket? I'm very inept when it comes to linux. – Michael Rogers Dec 29 '20 at 16:08

Apache access log not logging content-length for data served via PHP

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