26 package sun.net.www.protocol.jar; 27 28 import java.io.IOException; 29 import java.io.FileNotFoundException; 30 import java.net.URL; 31 import java.net.URLConnection; 32 import java.util.HashMap; 33 import java.util.jar.JarFile; 34 import java.security.Permission; 35 import sun.net.util.URLUtil; 36 37 /* A factory for cached JAR file. This class is used to both retrieve 38 * and cache Jar files. 39 * 40 * @author Benjamin Renaud 41 * @since JDK1.2 42 */ 43 class JarFileFactory implements URLJarFile.URLJarFileCloseController { 44 45 /* the url to file cache */ 46 private static HashMap<String, JarFile> fileCache = new HashMap<String, JarFile>(); 47 48 /* the file to url cache */ 49 private static HashMap<JarFile, URL> urlCache = new HashMap<JarFile, URL>(); 50 51 URLConnection getConnection(JarFile jarFile) throws IOException { 52 URL u = urlCache.get(jarFile); 53 if (u != null) 54 return u.openConnection(); 55 56 return null; 57 } 58 59 public JarFile get(URL url) throws IOException { 60 return get(url, true); 61 } 62 63 JarFile get(URL url, boolean useCaches) throws IOException { 64 if (url.getProtocol().equalsIgnoreCase("file")) { 65 // Deal with UNC pathnames specially. See 4180841 66 67 String host = url.getHost(); 68 if (host != null && !host.equals("") && 69 !host.equalsIgnoreCase("localhost")) { 70 71 url = new URL("file", "", "//" + host + url.getPath()); 72 } 73 } 74 75 JarFile result = null; 76 JarFile local_result = null; 77 78 if (useCaches) { 79 synchronized (this) { 80 result = getCachedJarFile(url); 81 } 82 if (result == null) { 83 local_result = URLJarFile.getJarFile(url, this); 84 synchronized (this) { 85 result = getCachedJarFile(url); 86 if (result == null) { 87 fileCache.put(URLUtil.urlNoFragString(url), local_result); 88 urlCache.put(local_result, url); 89 result = local_result; 90 } else { 91 if (local_result != null) { 92 local_result.close(); 93 } 94 } 95 } 96 } 97 } else { 98 result = URLJarFile.getJarFile(url, this); 99 } 100 if (result == null) 101 throw new FileNotFoundException(url.toString()); 102 103 return result; 104 } 105 106 /** 107 * Callback method of the URLJarFileCloseController to 108 * indicate that the JarFile is close. This way we can 109 * remove the JarFile from the cache 110 */ 111 public void close(JarFile jarFile) { 112 URL urlRemoved = urlCache.remove(jarFile); 113 if( urlRemoved != null) { 114 fileCache.remove(URLUtil.urlNoFragString(urlRemoved)); 115 } 116 } 117 118 private JarFile getCachedJarFile(URL url) { 119 JarFile result = fileCache.get(URLUtil.urlNoFragString(url)); 120 121 /* if the JAR file is cached, the permission will always be there */ 122 if (result != null) { 123 Permission perm = getPermission(result); 124 if (perm != null) { 125 SecurityManager sm = System.getSecurityManager(); 126 if (sm != null) { 127 try { 128 sm.checkPermission(perm); 129 } catch (SecurityException se) { 130 // fallback to checkRead/checkConnect for pre 1.2 131 // security managers 132 if ((perm instanceof java.io.FilePermission) && 133 perm.getActions().indexOf("read") != -1) { 134 sm.checkRead(perm.getName()); 135 } else if ((perm instanceof 136 java.net.SocketPermission) && 137 perm.getActions().indexOf("connect") != -1) { | 26 package sun.net.www.protocol.jar; 27 28 import java.io.IOException; 29 import java.io.FileNotFoundException; 30 import java.net.URL; 31 import java.net.URLConnection; 32 import java.util.HashMap; 33 import java.util.jar.JarFile; 34 import java.security.Permission; 35 import sun.net.util.URLUtil; 36 37 /* A factory for cached JAR file. This class is used to both retrieve 38 * and cache Jar files. 39 * 40 * @author Benjamin Renaud 41 * @since JDK1.2 42 */ 43 class JarFileFactory implements URLJarFile.URLJarFileCloseController { 44 45 /* the url to file cache */ 46 private static final HashMap<String, JarFile> fileCache = new HashMap<>(); 47 48 /* the file to url cache */ 49 private static final HashMap<JarFile, URL> urlCache = new HashMap<>(); 50 51 private static final JarFileFactory instance = new JarFileFactory(); 52 53 private JarFileFactory() { } 54 55 public static JarFileFactory getInstance() { 56 return instance; 57 } 58 59 URLConnection getConnection(JarFile jarFile) throws IOException { 60 URL u; 61 synchronized (instance) { 62 u = urlCache.get(jarFile); 63 } 64 if (u != null) 65 return u.openConnection(); 66 67 return null; 68 } 69 70 public JarFile get(URL url) throws IOException { 71 return get(url, true); 72 } 73 74 JarFile get(URL url, boolean useCaches) throws IOException { 75 if (url.getProtocol().equalsIgnoreCase("file")) { 76 // Deal with UNC pathnames specially. See 4180841 77 78 String host = url.getHost(); 79 if (host != null && !host.equals("") && 80 !host.equalsIgnoreCase("localhost")) { 81 82 url = new URL("file", "", "//" + host + url.getPath()); 83 } 84 } 85 86 JarFile result; 87 JarFile local_result; 88 89 if (useCaches) { 90 synchronized (instance) { 91 result = getCachedJarFile(url); 92 } 93 if (result == null) { 94 local_result = URLJarFile.getJarFile(url, this); 95 synchronized (instance) { 96 result = getCachedJarFile(url); 97 if (result == null) { 98 fileCache.put(URLUtil.urlNoFragString(url), local_result); 99 urlCache.put(local_result, url); 100 result = local_result; 101 } else { 102 if (local_result != null) { 103 local_result.close(); 104 } 105 } 106 } 107 } 108 } else { 109 result = URLJarFile.getJarFile(url, this); 110 } 111 if (result == null) 112 throw new FileNotFoundException(url.toString()); 113 114 return result; 115 } 116 117 /** 118 * Callback method of the URLJarFileCloseController to 119 * indicate that the JarFile is close. This way we can 120 * remove the JarFile from the cache 121 */ 122 public void close(JarFile jarFile) { 123 synchronized (instance) { 124 URL urlRemoved = urlCache.remove(jarFile); 125 if( urlRemoved != null) 126 fileCache.remove(URLUtil.urlNoFragString(urlRemoved)); 127 } 128 } 129 130 // must be called while holding the 'instance' lock 131 private JarFile getCachedJarFile(URL url) { 132 JarFile result = fileCache.get(URLUtil.urlNoFragString(url)); 133 134 /* if the JAR file is cached, the permission will always be there */ 135 if (result != null) { 136 Permission perm = getPermission(result); 137 if (perm != null) { 138 SecurityManager sm = System.getSecurityManager(); 139 if (sm != null) { 140 try { 141 sm.checkPermission(perm); 142 } catch (SecurityException se) { 143 // fallback to checkRead/checkConnect for pre 1.2 144 // security managers 145 if ((perm instanceof java.io.FilePermission) && 146 perm.getActions().indexOf("read") != -1) { 147 sm.checkRead(perm.getName()); 148 } else if ((perm instanceof 149 java.net.SocketPermission) && 150 perm.getActions().indexOf("connect") != -1) { |