Formating HTTP Logs

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To customize the format of the HTTP access logs you need to first choose a name for your custom log file. To do this, fill-in the name of your choice in the Filename field in the Logs tab in your site (Web > Sites menu).

Add a site: HTTP logs
Add a site: HTTP logs

This file will be stored in directory $HOME/admin/logs/http/.

The log lines are customized in the Format field. This field accepts character strings as well as a number of variables listed below. The syntax to use is {variable_name} to see its value appear in the access log lines.

The default format is as follows:

{request_hostname} {client_ip} - - [{completion_date:%d/%b/%Y:%H:%M:%S %z}] {request} {status} {response_size} {referer} {user_agent}

The log lines are displayed as follows:

blog.alwaysdata.com 198.51.100.42 - - [17/Jul/2018:15:05:30 +0200] "GET / HTTP/1.1" 200 10975 "https://www.alwaysdata.com/fr/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36"

Variables available

VariablesDescription
{client_ip}The IP address of the client that sent the request
{completion_date}The date when the request was served 1
{duration}Time taken to serve the request in seconds
{peer_ip}IP address of the peer that sent the request (proxy or original client where applicable)
{protocol}Request protocol mechanism (http, https, ws)
{referer}Value of the Referer header sent by the request
{request}First request line
{request_header}Request headers 2
{request_hostname}Host name required in the request
{request_method}Method used in the request (GET, POST, etc.)
{request_path}Path required in the request, including the query string
{request_protocol}Protocol used in the request (HTTP/1.1, HTTP/2, etc.)
{request_time}The date when the request was received 1
{response_header}Response headers 2
{response_size}Response size in bytes, excluding the HTTP headers
{status}Response status code (200, 301, 404, 500, etc.)
{user_agent}Value of the User-Agent header sent by the request

  1. May be formatted in line with the strftime syntax. Examples: {completion_date:{%d/%b/%Y}} → 16/Jul/2018, {completion_date:{%H:%M:%S}} → 12:04:07 ↩︎

  2. Only one header can be specified. E.g.: {request_header:authorization}, {response_header:age} (to be used with the HTTP cache) ↩︎