Error Log
The Error
Log records the essential Appweb configuration, details of denied
requests and trace information. The location of the error log
file is specified via the ErrorLog configuration file directive
and the level of logging is specified by the LogLevel
directive.
The verbosity of the messages written to the error log can be
specified by the LogLevel directive. The log level is a digit
ranging from 0, the least verbose to 9 being the most verbose.
For example, If you set the log level to 2, messages at levels 0
and 1 will be output to the log. Level 0 will only record errors.
Level 2 is the default and will record denied accesses. Levels
3-9 will record various internal Appweb activities. You should be
very careful with levels above 4 as the error log can grow very
large with high log levels.
Here is a sample error log. Some lines have been manually wrapped
to fit on the page.
default:2 m.0 Configuration for Mbedthis Appweb
default:2 m.0 --------------------------------------------
default:2 m.0 Host: polaris
default:2 m.0 CPU: IX86
default:2 m.0 OS: LINUX
default:2 m.0 Version: 1.0.0
default:2 m.0 BuildType: DEBUG
default:2 m.0 Started at: Fri Dec 19 13:54:23 2003
default:2 m.0 Max pool threads: 0
default:2 m.0 Log rotation count: 0
default:2 m.0 --------------------------------------------
default:2 m.0 Set log level for all modules to 2
default:2 m.0 Document Root for localhost:7777: "/var/appweb/web"
default:2 m.0 Activate static module ejs
default:2 m.0 Activate static module ssl
default:2 m.0 Loading module (DLL) Compat
default:2 m.0 Loading module (DLL) OpenSsl
default:2 m.0 Activate static module auth
default:2 m.0 Loading module (DLL) Cgi
default:2 m.0 Activate static module egi
default:2 m.0 Activate static module esp
default:2 m.0 Loading module (DLL) Debug
default:2 m.0 Activate static module static
default:2 m.0 Add authHandler
default:2 m.0 Add egiHandler for ".egi" documents
default:2 m.0 Add cgiHandler for ".cgi .cgi-nph .bat .cmd" documents
default:2 m.0 Add espHandler for ".esp .asp" documents
default:2 m.0 Add copyHandler
default:2 m.0 Add debugHandler
default:2 m.0 Add copyHandler
default:2 m.0 Document Root for *:4443: "/etc/appweb/web"
default:2 m.0 Starting host named: localhost:7777
default:2 m.0 Starting host named: *:4443
default:2 m.0 Listening for HTTP on 127.0.0.1:7777
default:2 m.0 Listening for HTTP on 127.0.0.1:4443 (secure)
default:2 m.0 Switching to background operation
default:2 m.0 HTTP services are ready
default:2 m.0 [Fri Dec 19 14:54:23 2003]
default:1 m.0 Error: 404 "Not Found" for "/myFile.html",
file "/var/appweb/web/myFile.html":
Can't open: /var/appweb/web/myFile.html
Each line in the error log is prefixed with source information.
This follows the format:
moduleName:logLevel ThreadName
The Module Name is an internal Appweb name. Developers can create
their own module names to assist with debugging. The log level is
the verbosity level assigned to the trace information by Appweb.
The ThreadName is an internal Appweb designed name given to each
thread of execution.
The error log is always contains a header detailing the high
level Appweb configuration. It specifies what version of Appweb
is being run, what handlers and modules are loaded and what IP
addresses are being listened to.
You may also specify the error log file and log level via the
Appweb command line "
-l" option. If you
invoke Appweb with a "
-l logSpec" command
line option, it will override the ErrorLog and LogLevel
directives.
Access Log
The
Access Log records the details of each successful request served
by Appweb. The access log file format is configurable and can log
requests in a variety of formats. By default, it will log in the
Combined Log File Format that is used by Apache. The location of
the access log file and its format is specified via the CustomLog
configuration file directive.
The access log file is parseable by many open source and
commercial log file analyzers. Here is a sample access log. Some
lines have been manually wrapped to fit on the page.
localhost - - [Fri Dec 19 16:08:13 2003] "GET /
HTTP/1.1" 302 464
localhost - - [Fri Dec 19 16:08:22 2003] "GET /doc/index.html
HTTP/1.1" 200 8006
localhost - - [Fri Dec 19 16:08:22 2003] "GET /doc/css/doc.css
HTTP/1.1" 200 10588
localhost - - [Fri Dec 19 16:08:22 2003] "GET /doc/images/backLeft.png
HTTP/1.1" 200 16492
localhost - - [Fri Dec 19 16:08:22 2003] "GET /doc/images/backMiddle.png
HTTP/1.1" 200 464
localhost - - [Fri Dec 19 16:08:22 2003] "GET /doc/images/backRight.png
HTTP/1.1" 200 987
localhost - - [Fri Dec 19 16:08:22 2003] "GET /doc/images/graybar.gif
HTTP/1.1" 200 290
localhost - - [Fri Dec 19 16:08:24 2003] "GET /doc/index.html
HTTP/1.1" 304 167
localhost - - [Fri Dec 19 16:08:24 2003] "GET /doc/css/doc.css
HTTP/1.1" 304 167
localhost - - [Fri Dec 19 16:08:24 2003] "GET /doc/images/backLeft.png
HTTP/1.1" 304 167
localhost - - [Fri Dec 19 16:08:24 2003] "GET /doc/images/backMiddle.png
HTTP/1.1" 304 165
localhost - - [Fri Dec 19 16:08:24 2003] "GET /doc/images/backRight.png
HTTP/1.1" 304 166