log-format The log-format variable followed by a space or \t for tab-delimited, specifies the log format string.

SPECIFIERS

• %x A date and time field matching the time-format and date-format variables. This is used when a timestamp is given instead of the date and time being in two separate variables.
• %ttime field matching the time-format variable.
• %ddate field matching the date-format variable.
• %vThe server name according to the canonical name setting (Server Blocks or Virtual Host).
• %eThis is the userid of the person requesting the document as determined by HTTP authentication.
• %hhost (the client IP address, either IPv4 or IPv6)
• %rThe request line from the client. This requires specific delimiters around the request (single quotes, double quotes, etc) to be parsable. Otherwise, use a combination of special format specifiers such as %m, %U, %q and %H to parse individual fields.
  • Note: Use either %r to get the full request OR %m, %U, %q and %H to form your request, do not use both.
• %mThe request method.
• %UThe URL path requested.
  • Note: If the query string is in %U, there is no need to use %q. However, if the URL path, does not include any query string, you may use %q and the query string will be appended to the request.
• %qThe query string.
• %HThe request protocol.
• %sThe status code that the server sends back to the client.
• %bThe size of the object returned to the client.
• %RThe “Referer” HTTP request header.
• %uThe user-agent HTTP request header.
• %DThe time taken to serve the request, in microseconds.
• %TThe time taken to serve the request, in seconds with milliseconds resolution.
• %L The time taken to serve the request, in milliseconds as a decimal number.
• %^Ignore this field.
• %~Move forward through the log string until a non-space (!isspace) char is found.
• ~hThe host (the client IP address, either IPv4 or IPv6) in a X-Forwarded-For (XFF) field.