Log - Apache Common Log Format

Apache Common Log Format is a Log format for a HTTP request received by a web server that comes from the Apache Web Server.

Log file entry for a request:

127.0.0.1 - - [24/Jul/1973:08:32:01 -0400] "GET /images/gerardnico.gif HTTP/1.0" 200 2564

where:

• 127.0.0.1 is the IP address (or host name, if available) of the client (remote host) which made the request to the server.
• - The “hyphen” in the output indicates that the requested piece of information (user identity from remote machine) is not available.
• - The “hyphen” in the output indicates that the requested piece of information (user identity from local logon) is not available.
• <wrap box>[24/Jul/1973:08:32:01 -0400]</note> The server “end time” to process the request. The format is: <wrap box>[day/month/year:hour:minute:second timezone]</note>
  • day = 2 digits
  • month = 3 letters
  • year = 4 digits
  • hour = 2 digits
  • minute = 2 digits
  • second = 2 digits
  • zone = (+ | -) 4 digits
• <wrap box>“GET /images/launch-logo.gif HTTP/1.0”</note> The first line of the request string from the client. It consists of a three components:
  • the request method (e.g., GET, POST, etc.),
  • the path (a Uniform Resource Identifier),
  • and the client protocol version.
• <wrap box>200</note> The status code
• <wrap>2564</note> The size of the object returned to the client, not including the response headers. If no content was returned to the client, this value will be “-” (or sometimes 0).

• two month's worth of all HTTP requests to the NASA Kennedy Space Center WWW server in Florida.

• http://httpd.apache.org/docs/1.3/logs.html#common