Java tutorial
/* * 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 com.mycompany; import io.milton.common.StreamUtils; import io.milton.http.Auth; import io.milton.http.HttpManager; import io.milton.http.Range; import io.milton.http.Request; import io.milton.http.Request.Method; import io.milton.http.exceptions.BadRequestException; import io.milton.http.exceptions.ConflictException; import io.milton.http.exceptions.NotAuthorizedException; import io.milton.http.http11.auth.OAuth2Helper; import io.milton.principal.CalDavPrincipal; import io.milton.resource.CollectionResource; import io.milton.resource.MakeCalendarResource; import io.milton.resource.MakeCollectionableResource; import io.milton.resource.OAuth2Provider; import io.milton.resource.PutableResource; import io.milton.resource.Resource; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.net.MalformedURLException; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Map; import org.apache.commons.io.output.ByteArrayOutputStream; public class TFolderResource extends TResource implements PutableResource, MakeCollectionableResource, MakeCalendarResource { private static org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(TResource.class); ArrayList<Resource> children = new ArrayList<Resource>(); public TFolderResource(TFolderResource parent, String name) { super(parent, name); log.debug("created new folder: " + name); } @Override protected Object clone(TFolderResource newParent, String newName) { TFolderResource newFolder = new TFolderResource(newParent, newName); for (Resource child : parent.getChildren()) { TResource res = (TResource) child; res.clone(newFolder, child.getName()); // will auto-add to folder } return newFolder; } @Override public Long getContentLength() { return null; } public String getContentType() { return null; } @Override public String checkRedirect(Request request) { return null; } @Override public List<? extends Resource> getChildren() { return children; } static ByteArrayOutputStream readStream(final InputStream in) throws IOException { ByteArrayOutputStream bos = new ByteArrayOutputStream(); StreamUtils.readTo(in, bos); return bos; } @Override public CollectionResource createCollection(String newName) { log.debug("createCollection: " + newName); TFolderResource r = new TFolderResource(this, newName); return r; } public Resource createNew(String newName, InputStream inputStream, Long length, String contentType) throws IOException { ByteArrayOutputStream bos = readStream(inputStream); log.debug("createNew: " + bos.size() + " - name: " + newName + " current child count: " + this.children.size()); TResource r = new TBinaryResource(this, newName, bos.toByteArray(), contentType); log.debug("new child count: " + this.children.size()); return r; } @Override public Resource child(String childName) { for (Resource r : getChildren()) { if (r.getName().equals(childName)) { return r; } } return null; } @Override public void sendContent(OutputStream out, Range range, Map<String, String> params, String contentType) throws IOException, NotAuthorizedException, BadRequestException, MalformedURLException { // HEY EVERYONE // This is just a really simple dumb example of generating content - // you CAN use JSPs and templates and stuff!! PrintWriter pw = new PrintWriter(out); pw.print("<html><body>"); pw.print("<h1>" + this.getName() + "</h1>"); Request req = HttpManager.request(); pw.print("<p>" + this.getClass().getCanonicalName() + "</p>"); CalDavPrincipal curUser = null; if (HttpManager.request().getAuthorization() != null) { curUser = (CalDavPrincipal) HttpManager.request().getAuthorization().getTag(); } if (curUser == null) { generateOAuthLoginLinks(pw); } else { pw.print("<h2>Logged in as: " + curUser.getName() + "</h2>"); } doBody(pw); pw.print("</body>"); pw.print("</html>"); pw.flush(); } private void generateOAuthLoginLinks(PrintWriter pw) { for (OAuth2Provider prov : getOAuth2Providers().values()) { String url = OAuth2Helper.getOAuth2URL(prov).toString(); pw.print("<li><a href='" + url + "'>Login with OAuth2 on " + prov.getProviderId() + "</a></li>"); } } protected void doBody(PrintWriter pw) { System.out.println("dobody - " + children.size()); pw.print("<ul>"); for (Resource r : this.children) { String href = r.getName(); if (r instanceof CollectionResource) { href = href + "/"; } pw.print("<li><a href='" + href + "'>" + r.getName() + "(" + r.getClass().getCanonicalName() + ")" + "</a></li>"); } pw.print("</ul>"); } @Override public String getContentType(String accepts) { return "text/html"; } public String getCTag() { Date d = getMostRecentModDate(); if (d == null) { System.out.println("No ctag"); return "000"; } else { String s = d.getTime() + "t"; System.out.println("ctag=" + s); return s; } } public Date getMostRecentModDate() { Date latest = this.getModifiedDate(); for (Resource r : this.getChildren()) { Date d; if (r instanceof TFolderResource) { TFolderResource tf = (TFolderResource) r; d = tf.getMostRecentModDate(); } else { d = r.getModifiedDate(); } if (d != null && (latest == null || d.after(latest))) { latest = d; } } return latest; } @Override public CollectionResource createCalendar(String newName) throws NotAuthorizedException, ConflictException, BadRequestException { TCalendarResource cal = new TCalendarResource(this, newName); return cal; } @Override public boolean authorise(Request request, Request.Method method, Auth auth) { // allow GET to the root folder if (parent == null && request.getMethod().equals(Method.GET)) { return true; } return super.authorise(request, method, auth); //To change body of generated methods, choose Tools | Templates. } @Override public Long getMaxAgeSeconds(Auth auth) { return null; // prevent caching of GET responses for web ui } }