Java tutorial
/* * * Copyright 2016 Netflix, Inc. * * Licensed 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.netflix.genie.web.resources.writers; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.annotation.JsonDeserialize; import com.fasterxml.jackson.databind.annotation.JsonSerialize; import com.google.common.collect.Lists; import com.netflix.genie.common.util.JsonDateDeserializer; import com.netflix.genie.common.util.JsonDateSerializer; import lombok.Data; import lombok.EqualsAndHashCode; import org.apache.catalina.util.ConcurrentDateFormat; import org.apache.catalina.util.ServerInfo; import org.apache.commons.io.FileUtils; import org.apache.commons.lang3.StringUtils; import org.hibernate.validator.constraints.NotBlank; import org.hibernate.validator.constraints.URL; import javax.validation.constraints.Min; import javax.validation.constraints.NotNull; import java.io.File; import java.io.IOException; import java.util.Date; import java.util.List; /** * A default directory writer implementation. * * @author tgianos * @since 3.0.0 */ public class DefaultDirectoryWriter implements DirectoryWriter { private static final String DEFAULT_CSS = "H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} " + "H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} " + "H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} " + "BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} " + "B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} " + "P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}" + "A {color : black;}" + "A.name {color : black;}" + ".line {height: 1px; background-color: #525D76; border: none;}"; /** * {@inheritDoc} * * @see org.apache.catalina.servlets.DefaultServlet */ @Override public String toHtml(@NotNull final File directory, @URL final String requestURL, final boolean includeParent) throws IOException { final Directory dir = this.getDirectory(directory, requestURL, includeParent); final StringBuilder builder = new StringBuilder(); // Render the page header builder.append("<!DOCTYPE html>"); builder.append("<html>"); builder.append("<head>"); builder.append("<title>"); builder.append(directory.getName()); builder.append("</title>"); builder.append("<style type=\"text/css\"><!--"); builder.append(DEFAULT_CSS); builder.append("--></style> "); builder.append("</head>"); // Body builder.append("<body>"); builder.append("<h1>").append(directory.getName()).append("</h1>"); builder.append("<HR size=\"1\" noshade=\"noshade\">"); builder.append("<table width=\"100%\" cellspacing=\"0\"" + " cellpadding=\"5\" align=\"center\">"); // Render the column headings builder.append("<tr>"); builder.append("<td align=\"left\"><font size=\"+1\"><strong>"); builder.append("Filename"); builder.append("</strong></font></td>"); builder.append("<td align=\"right\"><font size=\"+1\"><strong>"); builder.append("Size"); builder.append("</strong></font></td>"); builder.append("<td align=\"right\"><font size=\"+1\"><strong>"); builder.append("Last Modified"); builder.append("</strong></font></td>"); builder.append("</tr>"); // Write parent if necessary if (dir.getParent() != null) { this.writeFileHtml(builder, false, dir.getParent(), true); } boolean shade = true; // Write directories if (dir.getDirectories() != null) { for (final Entry entry : dir.getDirectories()) { this.writeFileHtml(builder, shade, entry, true); shade = !shade; } } // Write files if (dir.getFiles() != null) { for (final Entry entry : dir.getFiles()) { this.writeFileHtml(builder, shade, entry, false); shade = !shade; } } // Render the page footer builder.append("</table>"); builder.append("<HR size=\"1\" noshade=\"noshade\">"); // TODO: replace with something related to Genie builder.append("<h3>").append(ServerInfo.getServerInfo()).append("</h3>"); builder.append("</body>"); builder.append("</html>"); return builder.toString(); } /** * {@inheritDoc} */ @Override public String toJson(@NotNull final File directory, @URL final String requestURL, final boolean includeParent) throws Exception { final Directory dir = this.getDirectory(directory, requestURL, includeParent); final ObjectMapper mapper = new ObjectMapper(); return mapper.writeValueAsString(dir); } private void writeFileHtml(final StringBuilder builder, final boolean shade, final Entry entry, final boolean isDirectory) { builder.append("<tr"); if (shade) { builder.append(" bgcolor=\"#eeeeee\""); } builder.append(">"); builder.append("<td align=\"left\"> "); builder.append("<a href=\"").append(entry.getUrl()).append("\">"); builder.append("<tt>").append(entry.getName()).append("</tt></a></td>"); builder.append("<td align=\"right\"><tt>"); if (isDirectory) { builder.append("-"); } else { builder.append(FileUtils.byteCountToDisplaySize(entry.getSize())); } builder.append("</tt></td>"); final String lastModified = ConcurrentDateFormat.formatRfc1123(entry.getLastModified()); builder.append("<td align=\"right\"><tt>").append(lastModified).append("</tt></td>"); builder.append("</tr>"); } protected Directory getDirectory(final File directory, final String requestUrl, final boolean includeParent) { if (!directory.isDirectory()) { throw new IllegalArgumentException("Input directory is not a valid directory. Unable to continue."); } if (StringUtils.isBlank(requestUrl)) { throw new IllegalArgumentException("No request url entered. Unable to continue."); } final Directory dir = new Directory(); if (includeParent) { final Entry parent = new Entry(); String url = requestUrl; if (url.charAt(url.length() - 1) == '/') { url = url.substring(0, url.length() - 2); } // Rip off the last directory url = url.substring(0, url.lastIndexOf('/')); parent.setName("../"); parent.setUrl(url); parent.setSize(0L); parent.setLastModified(new Date(directory.getParentFile().getAbsoluteFile().lastModified())); dir.setParent(parent); } final File[] files = directory.listFiles(); dir.setDirectories(Lists.newArrayList()); dir.setFiles(Lists.newArrayList()); final String baseURL = requestUrl.endsWith("/") ? requestUrl : requestUrl + "/"; if (files != null) { for (final File file : files) { final Entry entry = new Entry(); entry.setLastModified(new Date(file.getAbsoluteFile().lastModified())); if (file.isDirectory()) { entry.setName(file.getName() + "/"); entry.setUrl(baseURL + file.getName() + "/"); entry.setSize(0L); dir.getDirectories().add(entry); } else { entry.setName(file.getName()); entry.setUrl(baseURL + file.getName()); entry.setSize(file.getAbsoluteFile().length()); dir.getFiles().add(entry); } } } dir.getDirectories() .sort((final Entry entry1, final Entry entry2) -> entry1.getName().compareTo(entry2.getName())); dir.getFiles() .sort((final Entry entry1, final Entry entry2) -> entry1.getName().compareTo(entry2.getName())); return dir; } @Data protected static class Directory { private Entry parent; private List<Entry> directories; private List<Entry> files; } @Data @EqualsAndHashCode(exclude = { "lastModified" }) protected static class Entry { @NotBlank private String name; @URL private String url; @Min(0) private long size; @JsonSerialize(using = JsonDateSerializer.class) @JsonDeserialize(using = JsonDateDeserializer.class) @NotNull private Date lastModified; /** * Get the last modified time as a date. * * @return The time this entry was last modified */ public Date getLastModified() { return new Date(this.lastModified.getTime()); } /** * Set the last modified time as a date. * * @param lastModified the new last modified time */ public void setLastModified(@NotNull final Date lastModified) { this.lastModified = new Date(lastModified.getTime()); } } }