- From: bpm <bpm@terraweb.com>
- Date: Thu, 14 Nov 1996 16:33:37 -0600
- To: Anselm Baird-Smith <abaird@w3.org>
- Cc: bpm@techapp.com, www-jigsaw@w3.org
Anselm Baird writes:
|
|Now the idea is that in your case:
|a) You create a HomogeneousDirectory to export cgi-bin,
|b) You create (as a child of it) a "template" resource, that is a
| CgiResource
|
|Then, you're all set :-) This will be recursive (could be an attribute
|to control wether the directory should clone itself to index sub-dirs,
|or not).
|
|
|Anselm.
Thanks for the hints. It helped a lot. I think that I tried to do
what you suggested. The CgiDirectory works. The sub directories of a
CgiDirectory work. The CgiPassDirectory works. But I can not get the
cloning of any sub directories that the CgiPassDirectory points to!!
What hints can you give me?
Also, what would I do to set up an editor of this CgiDirectory? It
would be nice to have an editor like the extension editor so I can
edit the "Child Template" from a form.
Oh yea, the CgiPassDirectory is equal to the PassDirectory except for
the class name & who it extends.
Here is the code:
// CgiDirectory.java
// $Id: CgiDirectory.java,v 1.0 $
package w3c.jigsaw.resources ;
import java.io.* ;
import java.util.* ;
import w3c.tools.sorter.*;
import w3c.jigsaw.http.* ;
import w3c.jigsaw.indexer.* ;
import w3c.jigsaw.html.* ;
import w3c.jigsaw.resources.* ;
import w3c.jigsaw.forms.* ;
import w3c.www.http.*;
/**
* A simple, and reasonably efficient Cgi directory resource.
* This directory resource embeds its own resource store object to keep
* track of its next children (wich might themselves be CgiDirectory). It
* is reasonably efficient in the sense that it won't overload the memory with
* unused informations. However, stay tuned for a <em>really</em> efficient
* file based directory resource (tuned to serve only files).
*/
public class CgiDirectory extends DirectoryResource
{
/**
* Attribute index - Does this applies to directory below this one.
*/
protected static int ATTR_GENERIC = -1 ;
/**
* Attribute index - The template for this directory.
*/
protected static int ATTR_TEMPLATE = -1;
/**
* Attribute index - The template for the child.
*/
protected static int ATTR_CHILD_TEMPLATE = -1;
static {
Attribute a = null ;
Class cls = null ;
try {
cls = Class.forName("w3c.jigsaw.resources.CgiDirectory") ;
} catch (Exception ex) {
ex.printStackTrace() ;
System.exit(1) ;
}
// The generic flag
a = new BooleanAttribute("generic"
, Boolean.FALSE
, Attribute.EDITABLE) ;
ATTR_GENERIC = AttributeRegistry.registerAttribute(cls, a) ;
// The template:
a = new AttributeHolderAttribute("template"
, null
, Attribute.EDITABLE);
ATTR_TEMPLATE = AttributeRegistry.registerAttribute(cls, a);
// The child:
a = new AttributeHolderAttribute("child_template"
, null
, Attribute.EDITABLE);
ATTR_CHILD_TEMPLATE = AttributeRegistry.registerAttribute(cls, a);
}
protected HTTPResource cloneDirectory(String name) {
HTTPResource template = getTemplate();
if ( template == null ) {
// Sever config error, track ity:
getServer().errlog(getClass().getName()+
"@"+
getURL()+
": no template !");
return null;
}
File file = new File(getDirectory(), name) ;
Hashtable defs = new Hashtable(13);
defs.put("parent", this);
defs.put("directory", file) ;
defs.put("identifier", name);
defs.put("resource-store", children) ;
defs.put("server", getServer()) ;
defs.put("url", getURL() + name);
try {
return (CgiDirectory) getClone(defs);
} catch (Exception ex) {
ex.printStackTrace() ;
return null ;
}
}
protected synchronized HTTPResource cloneTemplate(String name) {
HTTPResource template = getChildTemplate();
if ( template == null ) {
// Sever config error, track ity:
getServer().errlog(getClass().getName()+
"@"+
getURL()+
": no template !");
return null;
}
Hashtable defs = new Hashtable(11);
defs.put("parent", this);
defs.put("directory", getDirectory());
defs.put("identifier", name);
defs.put("resource-store", children) ;
defs.put("server", getServer()) ;
defs.put("url", getURL() + name);
try {
return (HTTPResource) template.getClone(defs);
} catch (Exception ex) {
ex.printStackTrace() ;
return null ;
}
}
/**
* Get the default cgi child target class.
*/
protected HTTPResource getChildTemplate() {
return (HTTPResource) getValue(ATTR_CHILD_TEMPLATE, null);
}
/**
* Get the default cgi child target class.
*/
protected HTTPResource getTemplate() {
return (HTTPResource) getValue(ATTR_TEMPLATE, null);
}
/**
* Set the default directory class.
*/
protected void setTemplate(HTTPResource template) {
setValue(ATTR_TEMPLATE, template);
}
/**
* Set the default cgi child target class.
*/
protected void setChildTemplate(HTTPResource template) {
setValue(ATTR_CHILD_TEMPLATE, template);
}
/**
* Get the generic flag value.
*/
protected boolean getGenericFlag() {
return getBoolean(ATTR_GENERIC, false) ;
}
/**
* Initialize a template.
**/
protected
HTTPResource
initTemplate( String className, HTTPResource template ) {
if ( template == null ) {
// This would be a very nice place to get a member value that is
// the class that we want to clone. Must have some editor like the
// extensions editor resource.
try {
Class cls = Class.forName(className);
try {
template = (HTTPResource) cls.newInstance();
template.setValue("identifier", getIdentifier());
return template;
} catch (Exception ex) {
String msg = ("Internal server error while "
+ "creating template "
+ " of class " + cls.getName()
+ ": " + ex.getMessage());
getServer().errlog(msg);
System.exit(1);
}
} catch (Exception ex) {
ex.printStackTrace();
System.exit(1);
}
}
return template;
}
public void initialize(Object values[]) {
super.initialize(values);
String childClassName = "w3c.jigsaw.forms.CgiResource";
String dirClassName = "w3c.jigsaw.resources.CgiDirectory";
HTTPResource template = initTemplate(childClassName,
getChildTemplate());
setChildTemplate(template);
template = initTemplate(dirClassName, getTemplate());
setTemplate(template);
}
/**
* Try creating a default resource having the given name.
* This method will make its best effort to create a default resource
* having this name in the directory. If a file with this name exists,
* it will check the pre-defined admin extensions and look for a match.
* If a directory with this name exists, and admin allows to do so, it
* will create a sub-directory resource.
* @param name The name of the resource to try to create.
* @return A Resource instance, if possible, <strong>null</strong>
* otherwise.
*/
public synchronized HTTPResource createDefaultResource(String name) {
HTTPResource resource;
// Don't automagically create resources of name '..' or '.'
if (name.equals("..") || name.equals("."))
return null ;
// Try building a default resource for it:
ResourceIndexer indexer = getServer().getIndexer() ;
// Is there a file with such a name ?
File file = new File(getDirectory(), name) ;
if ( ! file.exists() )
return null ;
// If the file system is not case sensitive, emulate it :-(
if ( getServer().checkFileSystemSensitivity() ) {
File directory = getDirectory();
if ( directory == null )
return null;
String files[] = directory.list();
boolean found = false;
for (int i = 0 ; i < files.length ; i++) {
if (found = files[i].equals(name))
break;
}
if ( ! found )
return null;
}
// Prepare a set of default parameters for the resource:
acquireChildren() ;
// Okay, dispatch on wether it is a file or a directory.
if ( file.isDirectory() )
resource = cloneDirectory(name);
else
resource = cloneTemplate(name);
if ( resource != null ) {
// Register this child in our store:
children.addResource(resource) ;
// Update or create any relevant negotiable resource:
if ( getNegotiableFlag() )
updateNegotiableResource(name) ;
markModified() ;
}
return resource ;
}
}
--
---
Brian Millett
Technology Applications Inc. "Heaven can not exist,
(314) 530-1981 If the family is not eternal"
bpm@techapp.com F. Ballard Washburn
Received on Thursday, 14 November 1996 17:32:23 UTC