io.undertow.server.handlers.accesslog

Class AccessLogHandler

java.lang.Object

io.undertow.server.handlers.accesslog.AccessLogHandler

All Implemented Interfaces:

HttpHandler

public class AccessLogHandler
extends Object
implements HttpHandler

Access log handler. This handler will generate access log messages based on the provided format string, and pass these messages into the provided AccessLogReceiver.

This handler can log any attribute that is provides via the ExchangeAttribute mechanism. A general guide to the most common attribute is provided before, however this mechanism is extensible.

This factory produces token handlers for the following patterns

• %a - Remote IP address
• %A - Local IP address
• %b - Bytes sent, excluding HTTP headers, or '-' if no bytes were sent
• %B - Bytes sent, excluding HTTP headers
• %h - Remote host name
• %H - Request protocol
• %l - Remote logical username from identd (always returns '-')
• %m - Request method
• %p - Local port
• %q - Query string (prepended with a '?' if it exists, otherwise an empty string
• %r - First line of the request
• %s - HTTP status code of the response
• %t - Date and time, in Common Log Format format
• %u - Remote user that was authenticated
• %U - Requested URL path
• %v - Local server name
• %D - Time taken to process the request, in millis
• %T - Time taken to process the request, in seconds
• %I - current Request thread name (can compare later with stacktraces)

In addition, the caller can specify one of the following aliases for commonly utilized patterns:

• common - %h %l %u %t "%r" %s %b
• combined - %h %l %u %t "%r" %s %b "%{i,Referer}" "%{i,User-Agent}"

There is also support to write information from the cookie, incoming header, or the session
It is modeled after the apache syntax:

• %{i,xxx} for incoming headers
• %{o,xxx} for outgoing response headers
• %{c,xxx} for a specific cookie
• %{r,xxx} xxx is an attribute in the ServletRequest
• %{s,xxx} xxx is an attribute in the HttpSession

Author:

Stuart Douglas

Constructor Summary

Constructors

Constructor and Description
AccessLogHandler(HttpHandler next, AccessLogReceiver accessLogReceiver, String formatString, ClassLoader classLoader)

Method Summary

Methods

Modifier and Type	Method and Description
void	handleRequest(HttpServerExchange exchange) Handle the request.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AccessLogHandler

public AccessLogHandler(HttpHandler next,
                AccessLogReceiver accessLogReceiver,
                String formatString,
                ClassLoader classLoader)

Method Detail

handleRequest

public void handleRequest(HttpServerExchange exchange)
                   throws Exception

Description copied from interface: HttpHandler

Handle the request.

Specified by:

handleRequest in interface HttpHandler

Parameters:

exchange - the HTTP request/response exchange

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object