Formating HTTP Logs
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Discovering the Public CloudGo to the Logs tab of your site (menu Web > Sites) to customize the HTTP access logs; stored afterwards in the $HOME/admin/logs/http/ directory.
Types of format
- Standard format1:
{request_hostname} {client_ip} - - [{completion_date:%d/%b/%Y:%H:%M:%S %z}] "{request}" {status} {response_size} "{referer}" "{user_agent}"
Example:
blog.alwaysdata.com 198.51.100.42 - - [17/Feb/2022:14:19:01 +0100] "GET /2022/02/01/2022-au-rapport/ HTTP/2.0" 200 16634 "https://blog.alwaysdata.com/" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0"
- Advanced format (default format):
{request_hostname} {client_ip} - - [{completion_date:%d/%b/%Y:%H:%M:%S %z}] "{request}" {status} {response_size} "{referer}" "{user_agent}" {protocol} {duration}
Example:
blog.alwaysdata.com 198.51.100.42 - - [17/Feb/2022:14:19:01 +0100] "GET /2022/02/01/2022-au-rapport/ HTTP/2.0" 200 16634 "https://blog.alwaysdata.com/" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:96.0) Gecko/20100101 Firefox/96.0" https 0.128109
To extract long requests, use the following command: awk '{print $NF,$0}' $HOME/admin/logs/http/[date]/[fichier].log | sort -n | cut -f2- -d' '
- Customized format. 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.
Variables available
| Variables | Description |
|---|---|
| {client_ip} | The IP address of the user that sent the request |
| {completion_date} | The date when the request was served 2 |
| {duration} | Time taken to serve the request in seconds |
| {peer_ip} | IP address of the peer that sent the request (proxy or original user 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 3 |
| {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 2 |
| {response_header} | Response headers 3 |
| {response_size} | Response size in bytes, excluding the HTTP headers |
| {ssl_version} | Version of the protocol used for the SSL connection |
| {status} | Response status code (200, 301, 404, 500, etc.) |
| {user_agent} | Value of the User-Agent header sent by the request |
Specific cases
To display the user IP behind Cloudflare use {request_header:cf-connecting-ip}.
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 ↩︎Only one header can be specified. E.g.:
{request_header:authorization},{response_header:age}(to be used with the HTTP cache) ↩︎