protected void processExistingResource(
HttpManager manager, Request request, Response response, Resource resource)
throws NotAuthorizedException {
if (handlerHelper.isNotCompatible(resource, request.getMethod()) || !isCompatible(resource)) {
responseHandler.respondMethodNotImplemented(resource, response, request);
return;
}
if (!handlerHelper.checkAuthorisation(manager, resource, request)) {
responseHandler.respondUnauthorised(resource, response, request);
return;
}
handlerHelper.checkExpects(responseHandler, request, response);
LockableResource r = (LockableResource) resource;
LockTimeout timeout = LockTimeout.parseTimeout(request);
String ifHeader = request.getIfHeader();
response.setContentTypeHeader(Response.XML);
if (ifHeader == null || ifHeader.length() == 0) {
processNewLock(manager, request, response, r, timeout);
} else {
processRefresh(manager, request, response, r, timeout, ifHeader);
}
}
protected void processNewLock(
HttpManager milton,
Request request,
Response response,
LockableResource r,
LockTimeout timeout)
throws NotAuthorizedException {
LockInfo lockInfo;
try {
lockInfo = LockInfoSaxHandler.parseLockInfo(request);
} catch (SAXException ex) {
throw new RuntimeException("Exception reading request body", ex);
} catch (IOException ex) {
throw new RuntimeException("Exception reading request body", ex);
}
if (handlerHelper.isLockedOut(request, r)) {
this.responseHandler.respondLocked(request, response, r);
return;
}
log.debug("locking: " + r.getName());
LockResult result;
try {
result = r.lock(timeout, lockInfo);
} catch (PreConditionFailedException ex) {
responseHandler.respondPreconditionFailed(request, response, r);
return;
} catch (LockedException ex) {
responseHandler.respondLocked(request, response, r);
return;
}
if (result.isSuccessful()) {
LockToken tok = result.getLockToken();
log.debug("..locked ok: " + tok.tokenId);
response.setLockTokenHeader(
"<opaquelocktoken:" + tok.tokenId + ">"); // spec says to set response header. See 8.10.1
respondWithToken(tok, request, response);
} else {
respondWithLockFailure(result, request, response);
}
}
@Override
public void process(HttpManager manager, Request request, Response response)
throws NotAuthorizedException, BadRequestException {
if (!handlerHelper.checkExpects(responseHandler, request, response)) {
return;
}
String host = request.getHostHeader();
String url = HttpManager.decodeUrl(request.getAbsolutePath());
// Find a resource if it exists
Resource r = manager.getResourceFactory().getResource(host, url);
if (r != null) {
log.debug("locking existing resource: " + r.getName());
processExistingResource(manager, request, response, r);
} else {
log.debug("lock target doesnt exist, attempting lock null..");
processNonExistingResource(manager, request, response, host, url);
}
}
/**
* (from the spec) 7.4 Write Locks and Null Resources
*
* <p>It is possible to assert a write lock on a null resource in order to lock the name.
*
* <p>A write locked null resource, referred to as a lock-null resource, MUST respond with a 404
* (Not Found) or 405 (Method Not Allowed) to any HTTP/1.1 or DAV methods except for PUT, MKCOL,
* OPTIONS, PROPFIND, LOCK, and UNLOCK. A lock-null resource MUST appear as a member of its parent
* collection. Additionally the lock-null resource MUST have defined on it all mandatory DAV
* properties. Most of these properties, such as all the get* properties, will have no value as a
* lock-null resource does not support the GET method. Lock-Null resources MUST have defined
* values for lockdiscovery and supportedlock properties.
*
* <p>Until a method such as PUT or MKCOL is successfully executed on the lock-null resource the
* resource MUST stay in the lock-null state. However, once a PUT or MKCOL is successfully
* executed on a lock-null resource the resource ceases to be in the lock-null state.
*
* <p>If the resource is unlocked, for any reason, without a PUT, MKCOL, or similar method having
* been successfully executed upon it then the resource MUST return to the null state.
*
* @param manager
* @param request
* @param response
* @param host
* @param url
*/
private void processNonExistingResource(
HttpManager manager, Request request, Response response, String host, String url)
throws NotAuthorizedException, BadRequestException {
String name;
Path parentPath = Path.path(url);
name = parentPath.getName();
parentPath = parentPath.getParent();
url = parentPath.toString();
Resource r = manager.getResourceFactory().getResource(host, url);
if (r != null) {
if (!handlerHelper.checkAuthorisation(manager, r, request)) {
responseHandler.respondUnauthorised(r, response, request);
return;
} else {
processCreateAndLock(manager, request, response, r, name);
}
} else {
log.debug("couldnt find parent to execute lock-null, returning not found");
// respondNotFound(response,request);
response.setStatus(Status.SC_CONFLICT);
}
}
