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Diffstat (limited to 'libjava/java/net/URL.java')
| -rw-r--r-- | libjava/java/net/URL.java | 373 |
1 files changed, 0 insertions, 373 deletions
diff --git a/libjava/java/net/URL.java b/libjava/java/net/URL.java deleted file mode 100644 index f80a52f5878..00000000000 --- a/libjava/java/net/URL.java +++ /dev/null @@ -1,373 +0,0 @@ -// URL.java - A Uniform Resource Locator. - -/* Copyright (C) 1999 Free Software Foundation - - This file is part of libgcj. - -This software is copyrighted work licensed under the terms of the -Libgcj License. Please consult the file "LIBGCJ_LICENSE" for -details. */ - -package java.net; - -import java.io.*; -import java.util.Hashtable; -import java.util.StringTokenizer; - -/** - * @author Warren Levy <warrenl@cygnus.com> - * @date March 4, 1999. - */ - -/** - * Written using on-line Java Platform 1.2 API Specification, as well - * as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998). - * Status: Believed complete and correct. - */ - -public final class URL implements Serializable -{ - private String protocol; - private String host; - private int port = -1; // Initialize for constructor using context. - private String file; - private String ref; - private URLStreamHandler handler; - private static Hashtable handlers = new Hashtable(); - private static URLStreamHandlerFactory factory; - - public URL(String protocol, String host, int port, String file) - throws MalformedURLException - { - this(protocol, host, port, file, null); - } - - public URL(String protocol, String host, String file) - throws MalformedURLException - { - this(protocol, host, -1, file, null); - } - - // JDK1.2 - public URL(String protocol, String host, int port, String file, - URLStreamHandler handler) throws MalformedURLException - { - if (protocol == null) - throw new MalformedURLException("null protocol"); - this.protocol = protocol; - - if (handler != null) - { - // TODO12: Need SecurityManager.checkPermission and - // TODO12: java.net.NetPermission from JDK 1.2 to be implemented. - // Throw an exception if an extant security mgr precludes - // specifying a StreamHandler. - // - // SecurityManager s = System.getSecurityManager(); - // if (s != null) - // s.checkPermission(NetPermission("specifyStreamHandler")); - - this.handler = handler; - } - else - this.handler = setURLStreamHandler(protocol); - - if (this.handler == null) - throw new MalformedURLException("Handler for protocol not found"); - - this.host = host; - - this.port = port; - - int hashAt = file.indexOf('#'); - if (hashAt < 0) - { - this.file = file; - this.ref = null; - } - else - { - this.file = file.substring(0, hashAt); - this.ref = file.substring(hashAt + 1); - } - } - - public URL(String spec) throws MalformedURLException - { - this((URL) null, spec, (URLStreamHandler) null); - } - - public URL(URL context, String spec) throws MalformedURLException - { - this(context, spec, (URLStreamHandler) null); - } - - // JDK1.2 - public URL(URL context, String spec, URLStreamHandler handler) - throws MalformedURLException - { - /* A protocol is defined by the doc as the substring before a ':' - * as long as the ':' occurs before any '/'. - * - * If context is null, then spec must be an absolute URL. - * - * The relative URL need not specify all the components of a URL. - * If the protocol, host name, or port number is missing, the value - * is inherited from the context. A bare file component is appended - * to the context's file. The optional anchor is not inherited. - */ - - // If this is an absolute URL, then ignore context completely. - // An absolute URL must have chars prior to "://" but cannot have a colon - // right after the "://". The second colon is for an optional port value - // and implies that the host from the context is used if available. - int colon; - if ((colon = spec.indexOf("://", 1)) > 0 && - ! spec.regionMatches(colon, "://:", 0, 4)) - context = null; - - int slash; - if ((colon = spec.indexOf(':')) > 0 && - (colon < (slash = spec.indexOf('/')) || slash < 0)) - { - // Protocol specified in spec string. - protocol = spec.substring(0, colon); - if (context != null && context.protocol.equals(protocol)) - { - // The 1.2 doc specifically says these are copied to the new URL. - host = context.host; - port = context.port; - file = context.file; - } - } - else if (context != null) - { - // Protocol NOT specified in spec string. - // Use context fields (except ref) as a foundation for relative URLs. - colon = -1; - protocol = context.protocol; - host = context.host; - port = context.port; - file = context.file; - } - else // Protocol NOT specified in spec. and no context available. - throw new - MalformedURLException("Absolute URL required with null context"); - - if (handler != null) - { - // TODO12: Need SecurityManager.checkPermission and - // TODO12: java.net.NetPermission from JDK 1.2 to be implemented. - // Throw an exception if an extant security mgr precludes - // specifying a StreamHandler. - // - // SecurityManager s = System.getSecurityManager(); - // if (s != null) - // s.checkPermission(NetPermission("specifyStreamHandler")); - - this.handler = handler; - } - else - this.handler = setURLStreamHandler(protocol); - - if (this.handler == null) - throw new MalformedURLException("Handler for protocol not found"); - - // JDK 1.2 doc for parseURL specifically states that any '#' ref - // is to be excluded by passing the 'limit' as the indexOf the '#' - // if one exists, otherwise pass the end of the string. - int hashAt = spec.indexOf('#', colon + 1); - this.handler.parseURL(this, spec, colon + 1, - hashAt < 0 ? spec.length() : hashAt); - if (hashAt >= 0) - ref = spec.substring(hashAt + 1); - } - - public boolean equals(Object obj) - { - if (obj == null || ! (obj instanceof URL)) - return false; - - URL uObj = (URL) obj; - - // This comparison is very conservative. It assumes that any - // field can be null. - return (port == uObj.port - && ((protocol == null && uObj.protocol == null) - || (protocol != null && protocol.equals(uObj.protocol))) - && ((host == null && uObj.host == null) - || (host != null && host.equals(uObj.host))) - && ((file == null && uObj.file == null) - || (file != null && file.equals(uObj.file))) - && ((ref == null && uObj.ref == null) - || (ref != null && ref.equals(uObj.ref)))); - } - - public final Object getContent() throws IOException - { - return openConnection().getContent(); - } - - public String getFile() - { - return file; - } - - public String getHost() - { - return host; - } - - public int getPort() - { - return port; - } - - public String getProtocol() - { - return protocol; - } - - public String getRef() - { - return ref; - } - - public int hashCode() - { - // JCL book says this is computed using (only) the hashcodes of the - // protocol, host and file fields. Empirical evidence indicates this - // is probably XOR in JDK 1.1. In JDK 1.2 it seems to be a sum including - // the port. - // - // JDK 1.2 online doc infers that host could be null because it - // explicitly states that file cannot be null but is silent on host. - // A simple example with protocol "http" (hashcode 3213448), host null, - // file "/" (hashcode 47) produced a hashcode (3213494) which appeared - // to be the sum of the two hashcodes plus the port. Another example - // using "/index.html" for file bore this out; as well as "#" for file - // (which was reduced to "" with a hashcode of zero). A "" host also - // causes the port number and the two hashcodes to be summed. - - return (protocol.hashCode() + ((host == null) ? 0 : host.hashCode()) + - port + file.hashCode()); - } - - public URLConnection openConnection() throws IOException - { - return handler.openConnection(this); - } - - public final InputStream openStream() throws IOException - { - return openConnection().getInputStream(); - } - - public boolean sameFile(URL other) - { - // This comparison is very conservative. It assumes that any - // field can be null. - return (other != null - && port == other.port - && ((protocol == null && other.protocol == null) - || (protocol != null && protocol.equals(other.protocol))) - && ((host == null && other.host == null) - || (host != null && host.equals(other.host))) - && ((file == null && other.file == null) - || (file != null && file.equals(other.file)))); - } - - protected void set(String protocol, String host, int port, String file, - String ref) - { - // TBD: Theoretically, a poorly written StreamHandler could pass an - // invalid protocol. It will cause the handler to be set to null - // thus overriding a valid handler. Callers of this method should - // be aware of this. - this.handler = setURLStreamHandler(protocol); - this.protocol = protocol; - this.port = port; - this.host = host; - this.file = file; - this.ref = ref; - } - - public static synchronized void - setURLStreamHandlerFactory(URLStreamHandlerFactory fac) - { - if (factory != null) - throw new Error("URLStreamHandlerFactory already set"); - - // Throw an exception if an extant security mgr precludes - // setting the factory. - SecurityManager s = System.getSecurityManager(); - if (s != null) - s.checkSetFactory(); - factory = fac; - } - - public String toExternalForm() - { - // Identical to toString(). - return handler.toExternalForm(this); - } - - public String toString() - { - // Identical to toExternalForm(). - return handler.toExternalForm(this); - } - - private URLStreamHandler setURLStreamHandler(String protocol) - { - URLStreamHandler handler; - - // See if a handler has been cached for this protocol. - if ((handler = (URLStreamHandler) handlers.get(protocol)) != null) - return handler; - - // If a non-default factory has been set, use it to find the protocol. - if (factory != null) - handler = factory.createURLStreamHandler(protocol); - - // Non-default factory may have returned null or a factory wasn't set. - // Use the default search algorithm to find a handler for this protocol. - if (handler == null) - { - // Get the list of packages to check and append our default handler - // to it, along with the JDK specified default as a last resort. - // Except in very unusual environments the JDK specified one shouldn't - // ever be needed (or available). - String propVal = System.getProperty("java.protocol.handler.pkgs"); - propVal = (propVal == null) ? "" : (propVal + "|"); - propVal = propVal + "gnu.gcj.protocol|sun.net.www.protocol"; - - StringTokenizer pkgPrefix = new StringTokenizer(propVal, "|"); - do - { - String facName = pkgPrefix.nextToken() + "." + protocol + - ".Handler"; - try - { - handler = - (URLStreamHandler) Class.forName(facName).newInstance(); - } - catch (Exception e) - { - // Can't instantiate; handler still null, go on to next element. - } - } while ((handler == null || - ! (handler instanceof URLStreamHandler)) && - pkgPrefix.hasMoreTokens()); - } - - // Update the hashtable with the new protocol handler. - if (handler != null) - if (handler instanceof URLStreamHandler) - handlers.put(protocol, handler); - else - handler = null; - - return handler; - } -} |