MONITORING WEB SERVER 7.0 in .NET Develop USS Code 128 in .NET MONITORING WEB SERVER 7.0 web pages barcode

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MONITORING WEB SERVER 7.0 using barcode integrating for none control to generate, create none image in none applications.printing barcode Access Log File Radio-frequency identification The default name of the Acces s Log le is access and it records information about requests to the server and the responses that your server sends back to the client. You can con gure the types of information recorded in the Web Server Access Log le and then use a log analyzer to determine valuable information regarding the interaction between the Web Server and its clients. The access-log element is used to con gure Access Log parameters in the server.

xml le. The following provides an example of the default con guration for the access-log element..

<access-log> < le>../logs/access</ le> </access-log> The le subelement is used to de ne the location of the Access Log le. If a fully quali ed le name is not provided as a value to this element, then all le references are relative to the instance s con g directory..

Note: See the Sun Java System none for none Web Server 7.0 Administrator s Con guration File Reference for additional properties that may be con gured for the Access Log..

Example 7.1 provides a sample Access Log le shortly after the server has started. Example 7.1 Access Log File format=%Ses->client.ip% - %Req->vars.auth-user% [%SYSDATE%] "%Req->reqpb.

clf-request%" %Req->srvhdrs.clf-status% %Req->srvhdrs.content-length% 10.

100.2.101 - - [05/Oct/2006:15:00:50 -0500] "GET / HTTP/1.

1" 200 9606 10.100.2.

101 - - [05/Oct/2006:15:00:50 -0500] "GET /img/sun_logo.gif HTTP/1.1" 200 2349 10.

100.2.101 - - [05/Oct/2006:15:00:51 -0500] "GET /img/a.

gif HTTP/1.1" 200 43 10.100.

2.101 - - [05/Oct/2006:15:00:51 -0500] "GET /img/sjsws_ title_text.gif HTTP/1.

1" 200 1822 10.100.2.

101 - - [05/Oct/2006:15:00:52 -0500] "GET /img/content_hline.gif HTTP/1.1" 200 473 10.

100.2.101 - - [05/Oct/2006:15:00:52 -0500] "GET /img/foo.

gif HTTP/1.1" 404 292. 7.3 METHODS FOR MONITORING THE WEB SERVER The rst line of Example 7.1 de nes the format of each log entry and helps to interpret the remaining lines in the log le. Given this format, client IP addresses are logged rst, followed by the authenticated username (if known).

The system date is logged next, followed by the actual HTTP request from the client, the server s response to that request, and the length (in bytes) of the content transferred to the client. Example 7.1 contains six GET requests and the associated responses that the Web Server sent the client for each request.

There is one GET request for the main page and ve additional GET requests for the images contained in the page. The rst ve requests contain a response code of 200 (which means the request was successful). The last request contains a response code of 404, which means that the item was not found on this server.

This is most likely due to an incorrect image reference in the web page. You should scan your log les on a periodic basis and address issues such as these. Server access logs can be in Common Log le Format, or you can provide your own customized format.

The Common Log le Format is a commonly supported format across multiple vendor web servers and provides a xed amount of information about the server. You can elect to customize your log le format through the use of parameter blocks (pblocks), which allow you to control what gets logged. For a list of customizable format parameters, see the Sun Java System Web Server 7.

0 NSAPI Developer s Guide.. Note: You can alter the forma none for none t of the Access Log through the Administrative Console, command line interface, or by directly editing the server.xml le for the appropriate server instance..

After an Access Log for a par ticular con guration has been created, you cannot change its properties until you either archive it or create a new Access Log le for the con guration.. Server Log File The default name of the Serve r Log le is errors. This le lists all the errors the server has encountered as well as all server starts and stops. The Server Log contains messages generated when the Web Server runs events (such as loading a certi cate revocation list) and you can even add your own entries to the Server Log, using the log SAF.

You can con gure the level of detail provided in the Server Log by modifying the log-level attribute in the server.xml le..

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