Detecting Data Change in JS

[Adam Nottingham]

My current project is something to track print usage. After logging into the printer's web interface and looking at the logs I realized that it was a rolling log with a fixed number or rows. Therefore, once it is full the bottom element falls off and one is added to the top something like a queue. While looking at the source for the page however, I noticed that the actual data was store in the JScript source instead of being recorded. I have made the line I'm talking about bold down below.

Basically what I want to do is, as soon as the online log is updated I want to be able to pull that info from the page and save it to another file on my hard drive. How can I go about automating this so that it will watch the page and automatically pull the information?

I have added the part of the .html containing the appropriate script.

Thanks

<SCRIPT LANGUAGE = "Javascript">
			var sTableOrFormTagAttr; // Holds the HTML string of table and/or form tag attributes
			var sTableOrFormEndTag; // Holds the HTML string of table and/or form end tags
			var arrTHCells_InnerHtml; //array that the Inner HTML of the table header
			var arrTDCells_InnreText; //array that holds the contents of the Table data cells.

			
			sTableOrFormTagAttr = "<FORM NAME='frmPrintLogs'>"
								+ "<SPAN CLASS='clsBody'>"
								+"<A NAME = 'TOP'></A>"
								+ "<TABLE ID = 'tblPrintLogs' NAME = 'tblPrintLogs' WIDTH = '800'  BORDER = '1' CELLSPACING = '0' CELLPADDING = '3' WIDTH = '100%'>"
								+ "<TR HEIGHT='25' WIDTH ='100%'>";
			sTableOrFormEndTag	= "</TABLE>"
								  + "<A CLASS='clsBody' HREF='#TOP'>Go to top of this page</A>"
								+ "</SPAN>"
								+ "</FORM>";
			
			arrTHCells_InnerHtml = new Array(7);
			
			arrTHCells_InnerHtml[0]="<TD CLASS = 'clsBTableSortHeader' WIDTH = '25%'><A class='clsBTableHeader' HREF='javascript:fnnSort(0,4,\"name\")' >User Name</TD>"
			arrTHCells_InnerHtml[1]="<TD CLASS = 'clsBTableSortHeader' WIDTH = '25%'><A class='clsBTableHeader' HREF='javascript:fnnSort(1,1,\"name\")' >Document Name</TD>"
			arrTHCells_InnerHtml[2]="<TD CLASS = 'clsBTableSortHeader' WIDTH = '14%' NOWRAP><A class='clsBTableHeader' HREF='javascript:fnnSort(2,2,\"date\")' >Date Time</A></TD>"
			arrTHCells_InnerHtml[3]="<TD CLASS = 'clsBTableSortHeader' WIDTH = '14%'><A class='clsBTableHeader' HREF='javascript:fnnSort(3,3,\"name\")' >Type</TD>"
			arrTHCells_InnerHtml[4]="<TD CLASS = 'clsBTableSortHeader' WIDTH = '8%'>Paper</TD>" 
			arrTHCells_InnerHtml[5]="<TD CLASS = 'clsBTableSortHeader' WIDTH = '7%'>Pages</TD>"
			arrTHCells_InnerHtml[6]="<TD CLASS = 'clsBTableSortHeader' WIDTH = '7%'>Sets</TD>"
			
			sTableData = new String("{241, ,1269878111, ,REPORT  , , ,OK,1,1},{240, ,1269877792, ,FAX:  , ,LTR,OK,3,1},");
			
			if(sTableData != "")
			{	
				// Get the table data got from the backend in the form of array
				arrTDCells_InnreText = fnarrGetTableDataArray(sTableData);
				//Hema commented on 10th january 2003--start
				/*var lsDateFormat = "<aspTAGetDateFormat()>";
				for (var i=0; i<arrTDCells_InnreText.length; i++)
				{
					// 050803, as per the TTEC-san request if the date data is returned -1 from the backend then display just blank
					if(arrTDCells_InnreText[i][2] == -1)
						arrTDCells_InnreText[i][2] = " ";
					else
						arrTDCells_InnreText[i][2] = fnsDateFormatConversion(arrTDCells_InnreText[i][2], lsDateFormat);
				}*/
				//Hema commented on 10th january 2003--end
			}
			else
				arrTDCells_InnreText ="";	
				
			// pass all the information, specific to this page to SortingTable.js
			fnnInit(arrTHCells_InnerHtml,arrTDCells_InnreText);
				
			//Form the string of Inner Html of the whole table data
			sTableStr = sTableOrFormTagAttr;// Add the Table or Form start tag and attributes
			sTableStr += fnngSortTable(2,2,"date");// Sorts the Table as per the default settings and returns the inner Html of Table Header and the Data cells
			/* Srinivas modified for DocName support on 11/07/06 End */
			sTableStr += sTableOrFormEndTag;// Table and/or Form End tag info
		</SCRIPT>		

[Bear Bibeault]

Please UseCodeTags.

[Adam Nottingham]

Ah I apologize. Thanks.

The applicable line that was in bold is now on line 28.

[Eric Pascarello]

Why don't you just use a client application to fetch the url and read the file? Simple reg exp can grab it, rip it apart, and you can save it.

Seems pretty weird you do not have a log on the server you can tail in the first place.

Eric