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Accepted
Vladimir Panteleev
Asked: 2012-02-13 23:59:40 +0800 CST

How to log the URL scheme (http / https) in Apache?

  • 772

nginx has the $scheme variable usable in its log_format lines.

%H is the request protocol (e.g. "HTTP/1.1").

How can I do the same with Apache?

logging apache-2.2

5 Answers

  1. This works for me with Apache 2.4.23:

    LogFormat "%{REQUEST_SCHEME}x ..." my_log_format

    %{varname}x is only available when mod_ssl is loaded, see: https://httpd.apache.org/docs/trunk/mod/mod_ssl.html#logformats

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  2. Best Answer

    One way to do it is to have two conditional CustomLog directives, controlled by whether the HTTPS variable is set.

    CustomLog logs/access.log "https://..." env=HTTPS
CustomLog logs/access.log "http://..." env=!HTTPS

    I have also tried using SetEnvIf in the following manner, but it doesn't work (it logs -):

    SetEnv URL_SCHEME=http
SetEnvIf HTTPS on URL_SCHEME=https
CustomLog logs/access.log "%{URL_SCHEME}e://..."
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  3. For some reason I could not get the examples above to work, so found another way: you can add 2 rewrite rules into your configuration as follows: 

    RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ - [E=SCHEME:HTTP]

RewriteCond %{HTTPS} =on
RewriteRule ^(.*)$ - [E=SCHEME:HTTPS]

    Then add this into your LogFormat definition.

    scheme=\"%{SCHEME}e\"
    • 3

  4. As the url scheme is not directly available in apache log format, you may log the canonical port (e.g. 80/443) of the server serving the request by using %p as an alternative:

    CustomLog access.log "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\" port:%p"
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  5. Define your log output and add %H to it. This is the same for Apache.

    So, you build a LogFormat like this and afaik there are a couple defined in the default apache configuration.

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

    and add the name of the LogFormat (in this case "common") to the end of your logfile call

    CustomLog logs/access_log common

    Just look here for further informations about the log and here about the different format strings.

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