User Guide

ZipBrowser Example 397
ColdFusion processes the page and returns a page that displays the text “Hello,
Robert.” If an error is returned instead, check the source code to make sure you have
entered it correctly.
ZipBrowser Example
The following example illustrates the use of the Request, Response, and Query
objects. The example uses the
java.util.zip package to implement a Java CFX
called
ZipBrowser, which is a zip file browsing tag.
The tag’s
archive attribute specifies the fully qualified path of the zip archive to
browse. The tag’s
name attribute must specify the query to return to the calling page.
The returned query contains three columns: Name, Size, and Compressed.
For example, to query an archive at the path C:\logfiles.zip for its contents and
output the results, you use the following CFML code:
<cfx_ZipBrowser
archive="C:\logfiles.zip"
name="LogFiles" >
<cfoutput query="LogFiles">
#Name#, #Size#, #Compressed# <BR>
</cfoutput>
The Java implementation of ZipBrowser is as follows:
import com.allaire.cfx.* ;
import java.util.Hashtable ;
import java.io.FileInputStream ;
import java.util.zip.* ;
public class ZipBrowser implements CustomTag
{
public void processRequest( Request request, Response response )
throws Exception
{
// validate that required attributes were passed
if ( !request.attributeExists( "ARCHIVE" ) ||
!request.attributeExists( "NAME" ) )
{
throw new Exception(
"Missing attribute (ARCHIVE and NAME are both " +
"required attributes for this tag)" ) ;
}
// get attribute values
String strArchive = request.getAttribute( "ARCHIVE" ) ;
String strName = request.getAttribute( "NAME" ) ;
// create a query to use for returning the list of files
String[] columns = { "Name", "Size", "Compressed" } ;
int iName = 1, iSize = 2, iCompressed = 3 ;
Query files = response.addQuery( strName, columns ) ;