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Milton Community Edition: Supports DAV level 1 and is available on Apache2 license
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package io.milton.http.webdav;
import io.milton.http.Handler;
import io.milton.resource.CollectionResource;
import io.milton.resource.Resource;
import io.milton.http.HandlerHelper;
import io.milton.http.HttpManager;
import io.milton.resource.MakeCollectionableResource;
import io.milton.common.Path;
import io.milton.http.Request.Method;
import io.milton.http.Response.Status;
import io.milton.http.exceptions.BadRequestException;
import io.milton.http.exceptions.ConflictException;
import io.milton.http.exceptions.NotAuthorizedException;
import io.milton.event.NewFolderEvent;
import io.milton.http.Request;
import io.milton.http.Response;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class MkColHandler implements Handler {
private static final Logger log = LoggerFactory.getLogger(MkColHandler.class);
private final WebDavResponseHandler responseHandler;
private final HandlerHelper handlerHelper;
private CollectionResourceCreator collectionResourceCreator = new DefaultCollectionResourceCreator();
public MkColHandler(WebDavResponseHandler responseHandler, HandlerHelper handlerHelper) {
this.responseHandler = responseHandler;
this.handlerHelper = handlerHelper;
}
@Override
public String[] getMethods() {
return new String[]{Method.MKCOL.code};
}
@Override
public boolean isCompatible(Resource r) {
return (r instanceof MakeCollectionableResource);
}
@Override
public void process(HttpManager manager, Request request, Response response) throws ConflictException, NotAuthorizedException, BadRequestException {
try {
process(manager, request, response, collectionResourceCreator);
} catch (IOException ex) {
throw new RuntimeException(ex);
}
}
public void process(HttpManager manager, Request request, Response response, CollectionResourceCreator creator) throws ConflictException, NotAuthorizedException, BadRequestException, IOException {
if (!handlerHelper.checkExpects(responseHandler, request, response)) {
return;
}
String host = request.getHostHeader();
String finalurl = HttpManager.decodeUrl(request.getAbsolutePath());
String name;
if (log.isDebugEnabled()) {
log.debug("process request: host: " + host + " url: " + finalurl);
}
Path finalpath = Path.path(finalurl); //this is the parent collection it goes in
name = finalpath.getName();
Path parent = finalpath.getParent();
String parenturl = parent.toString();
Resource parentcol = manager.getResourceFactory().getResource(host, parenturl);
if (parentcol != null) {
log.debug("process: resource: " + parentcol.getClass().getName());
if (handlerHelper.isNotCompatible(parentcol, request.getMethod())) {
log.debug("resource not compatible. Resource class: " + parentcol.getClass() + " handler: " + getClass());
responseHandler.respondMethodNotImplemented(parentcol, response, request);
return;
}
if (handlerHelper.isLockedOut(request, parentcol)) {
log.warn("isLockedOut");
response.setStatus(Status.SC_LOCKED);
return;
}
Resource dest = manager.getResourceFactory().getResource(host, finalpath.toString());
if (dest != null) {
if (handlerHelper.isLockedOut(request, dest)) {
log.info("destination exists and is locked");
responseHandler.respondLocked(request, response, dest);
} else {
log.info("destination exists and is not locked");
responseHandler.respondMethodNotAllowed(dest, response, request);
}
return;
}
if (handlerHelper.missingLock(request, parentcol)) {
// ensure the dest is not locked
if (handlerHelper.isLocked(dest)) {
log.info("precondition failed");
//response.setStatus(Status.SC_PRECONDITION_FAILED); //notowner_modify wants this code here
responseHandler.respondPreconditionFailed(request, response, dest);
return;
}
}
if (parentcol instanceof CollectionResource) {
CollectionResource col = (CollectionResource) parentcol;
if (log.isTraceEnabled()) {
log.trace("process mkcol on parent: " + parentcol.getClass() + " with creator: " + creator.getClass());
}
processMakeCol(manager, request, response, col, name, creator);
} else {
log.warn("parent collection is no a CollectionResource: " + parentcol.getName());
responseHandler.respondConflict(parentcol, response, request, "not a collection");
}
} else {
log.warn("parent does not exist: host=" + host + " path=" + parenturl);
manager.getResponseHandler().respondConflict(parentcol, response, request, name);
}
}
private void processMakeCol(HttpManager manager, Request request, Response response, CollectionResource resource, String newName, CollectionResourceCreator creator) throws ConflictException, NotAuthorizedException, BadRequestException, IOException {
if (!handlerHelper.checkAuthorisation(manager, resource, request)) {
log.info("not authorised");
responseHandler.respondUnauthorised(resource, response, request);
return;
}
handlerHelper.checkExpects(responseHandler, request, response);
if (!isCompatible(resource)) {
log.info("not compatible");
responseHandler.respondMethodNotImplemented(resource, response, request);
return;
}
MakeCollectionableResource existingCol = (MakeCollectionableResource) resource;
// try {
// //For litmus test and RFC support
// if (request.getInputStream().read() > -1) //This should be empty
// {
// log.info("unsupported media type1");
// response.setStatus(Response.Status.SC_UNSUPPORTED_MEDIA_TYPE);
// return;
// }
// } catch (Exception ex) {
// //Per RFC2518 MKCOL request-content is undefined and it is therefore MANDATORY to return 415 if it exists.
// if (request.getContentLengthHeader() > 0) {
// log.info("unsupported media type2");
// response.setStatus(Response.Status.SC_UNSUPPORTED_MEDIA_TYPE);
// return;
// }
// }
Resource existingChild = existingCol.child(newName);
if (existingChild != null) {
log.warn("found already existing item: " + newName + " of type: " + existingChild.getClass() + " with actual name: " + existingChild.getName());
//throw new ConflictException( existingChild );
// See http://www.ettrema.com:8080/browse/MIL-86
// 405 (Method Not Allowed) - MKCOL can only be executed on a deleted/non-existent resource.
responseHandler.respondMethodNotAllowed(existingChild, response, request);
return;
}
CollectionResource made = creator.createResource(existingCol, newName, request);
if (made == null) {
log.warn("createCollection returned null. In resource class: " + existingCol.getClass());
response.setStatus(Response.Status.SC_METHOD_NOT_ALLOWED);
} else {
log.info("created item ok: " + made.getClass());
manager.getEventManager().fireEvent(new NewFolderEvent(resource));
response.setStatus(Response.Status.SC_CREATED);
}
}
public CollectionResourceCreator getCollectionResourceCreator() {
return collectionResourceCreator;
}
public void setCollectionResourceCreator(CollectionResourceCreator collectionResourceCreator) {
this.collectionResourceCreator = collectionResourceCreator;
}
public interface CollectionResourceCreator {
CollectionResource createResource(MakeCollectionableResource existingCol, String newName, Request request) throws ConflictException, NotAuthorizedException, BadRequestException, IOException;
}
private static class DefaultCollectionResourceCreator implements CollectionResourceCreator {
@Override
public CollectionResource createResource(MakeCollectionableResource existingCol, String newName, Request request) throws ConflictException, NotAuthorizedException, BadRequestException, IOException {
return existingCol.createCollection(newName);
}
}
}