| /* |
| * Copyright (c) 1995, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.net; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.spi.URLStreamHandlerProvider; |
| import java.nio.file.Path; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.Hashtable; |
| import java.io.InvalidObjectException; |
| import java.io.ObjectStreamException; |
| import java.io.ObjectStreamField; |
| import java.io.ObjectInputStream.GetField; |
| import java.util.Iterator; |
| import java.util.Locale; |
| import java.util.NoSuchElementException; |
| import java.util.ServiceConfigurationError; |
| import java.util.ServiceLoader; |
| |
| import jdk.internal.access.JavaNetURLAccess; |
| import jdk.internal.access.SharedSecrets; |
| import sun.security.util.SecurityConstants; |
| import sun.security.action.GetPropertyAction; |
| |
| /** |
| * Class {@code URL} represents a Uniform Resource |
| * Locator, a pointer to a "resource" on the World |
| * Wide Web. A resource can be something as simple as a file or a |
| * directory, or it can be a reference to a more complicated object, |
| * such as a query to a database or to a search engine. More |
| * information on the types of URLs and their formats can be found at: |
| * <a href= |
| * "http://web.archive.org/web/20051219043731/http://archive.ncsa.uiuc.edu/SDG/Software/Mosaic/Demo/url-primer.html"> |
| * <i>Types of URL</i></a> |
| * <p> |
| * In general, a URL can be broken into several parts. Consider the |
| * following example: |
| * <blockquote><pre> |
| * http://www.example.com/docs/resource1.html |
| * </pre></blockquote> |
| * <p> |
| * The URL above indicates that the protocol to use is |
| * {@code http} (HyperText Transfer Protocol) and that the |
| * information resides on a host machine named |
| * {@code www.example.com}. The information on that host |
| * machine is named {@code /docs/resource1.html}. The exact |
| * meaning of this name on the host machine is both protocol |
| * dependent and host dependent. The information normally resides in |
| * a file, but it could be generated on the fly. This component of |
| * the URL is called the <i>path</i> component. |
| * <p> |
| * A URL can optionally specify a "port", which is the |
| * port number to which the TCP connection is made on the remote host |
| * machine. If the port is not specified, the default port for |
| * the protocol is used instead. For example, the default port for |
| * {@code http} is {@code 80}. An alternative port could be |
| * specified as: |
| * <blockquote><pre> |
| * http://www.example.com:1080/docs/resource1.html |
| * </pre></blockquote> |
| * <p> |
| * The syntax of {@code URL} is defined by <a |
| * href="http://www.ietf.org/rfc/rfc2396.txt"><i>RFC 2396: Uniform |
| * Resource Identifiers (URI): Generic Syntax</i></a>, amended by <a |
| * href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format for |
| * Literal IPv6 Addresses in URLs</i></a>. The Literal IPv6 address format |
| * also supports scope_ids. The syntax and usage of scope_ids is described |
| * <a href="Inet6Address.html#scoped">here</a>. |
| * <p> |
| * A URL may have appended to it a "fragment", also known |
| * as a "ref" or a "reference". The fragment is indicated by the sharp |
| * sign character "#" followed by more characters. For example, |
| * <blockquote><pre> |
| * http://www.example.com/index.html#chapter1 |
| * </pre></blockquote> |
| * <p> |
| * This fragment is not technically part of the URL. Rather, it |
| * indicates that after the specified resource is retrieved, the |
| * application is specifically interested in that part of the |
| * document that has the tag {@code chapter1} attached to it. The |
| * meaning of a tag is resource specific. |
| * <p> |
| * An application can also specify a "relative URL", |
| * which contains only enough information to reach the resource |
| * relative to another URL. Relative URLs are frequently used within |
| * HTML pages. For example, if the contents of the URL: |
| * <blockquote><pre> |
| * http://www.example.com/index.html |
| * </pre></blockquote> |
| * contained within it the relative URL: |
| * <blockquote><pre> |
| * FAQ.html |
| * </pre></blockquote> |
| * it would be a shorthand for: |
| * <blockquote><pre> |
| * http://www.example.com/FAQ.html |
| * </pre></blockquote> |
| * <p> |
| * 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 fully specified URL. The file component must be |
| * specified. The optional fragment is not inherited. |
| * <p> |
| * The URL class does not itself encode or decode any URL components |
| * according to the escaping mechanism defined in RFC2396. It is the |
| * responsibility of the caller to encode any fields, which need to be |
| * escaped prior to calling URL, and also to decode any escaped fields, |
| * that are returned from URL. Furthermore, because URL has no knowledge |
| * of URL escaping, it does not recognise equivalence between the encoded |
| * or decoded form of the same URL. For example, the two URLs:<br> |
| * <pre> http://foo.com/hello world/ and http://foo.com/hello%20world</pre> |
| * would be considered not equal to each other. |
| * <p> |
| * Note, the {@link java.net.URI} class does perform escaping of its |
| * component fields in certain circumstances. The recommended way |
| * to manage the encoding and decoding of URLs is to use {@link java.net.URI}, |
| * and to convert between these two classes using {@link #toURI()} and |
| * {@link URI#toURL()}. |
| * <p> |
| * The {@link URLEncoder} and {@link URLDecoder} classes can also be |
| * used, but only for HTML form encoding, which is not the same |
| * as the encoding scheme defined in RFC2396. |
| * |
| * @apiNote |
| * |
| * Applications working with file paths and file URIs should take great |
| * care to use the appropriate methods to convert between the two. |
| * The {@link Path#of(URI)} factory method and the {@link File#File(URI)} |
| * constructor can be used to create {@link Path} or {@link File} |
| * objects from a file URI. {@link Path#toUri()} and {@link File#toURI()} |
| * can be used to create a {@link URI} from a file path, which can be |
| * converted to URL using {@link URI#toURL()}. |
| * Applications should never try to {@linkplain #URL(String, String, String) |
| * construct} or {@linkplain #URL(String) parse} a {@code URL} |
| * from the direct string representation of a {@code File} or {@code Path} |
| * instance. |
| * <p> |
| * Some components of a URL or URI, such as <i>userinfo</i>, may |
| * be abused to construct misleading URLs or URIs. Applications |
| * that deal with URLs or URIs should take into account |
| * the recommendations advised in <a |
| * href="https://tools.ietf.org/html/rfc3986#section-7">RFC3986, |
| * Section 7, Security Considerations</a>. |
| * |
| * @author James Gosling |
| * @since 1.0 |
| */ |
| public final class URL implements java.io.Serializable { |
| |
| static final String BUILTIN_HANDLERS_PREFIX = "sun.net.www.protocol"; |
| static final long serialVersionUID = -7627629688361524110L; |
| |
| /** |
| * The property which specifies the package prefix list to be scanned |
| * for protocol handlers. The value of this property (if any) should |
| * be a vertical bar delimited list of package names to search through |
| * for a protocol handler to load. The policy of this class is that |
| * all protocol handlers will be in a class called <protocolname>.Handler, |
| * and each package in the list is examined in turn for a matching |
| * handler. If none are found (or the property is not specified), the |
| * default package prefix, sun.net.www.protocol, is used. The search |
| * proceeds from the first package in the list to the last and stops |
| * when a match is found. |
| */ |
| private static final String protocolPathProp = "java.protocol.handler.pkgs"; |
| |
| /** |
| * The protocol to use (ftp, http, nntp, ... etc.) . |
| * @serial |
| */ |
| private String protocol; |
| |
| /** |
| * The host name to connect to. |
| * @serial |
| */ |
| private String host; |
| |
| /** |
| * The protocol port to connect to. |
| * @serial |
| */ |
| private int port = -1; |
| |
| /** |
| * The specified file name on that host. {@code file} is |
| * defined as {@code path[?query]} |
| * @serial |
| */ |
| private String file; |
| |
| /** |
| * The query part of this URL. |
| */ |
| private transient String query; |
| |
| /** |
| * The authority part of this URL. |
| * @serial |
| */ |
| private String authority; |
| |
| /** |
| * The path part of this URL. |
| */ |
| private transient String path; |
| |
| /** |
| * The userinfo part of this URL. |
| */ |
| private transient String userInfo; |
| |
| /** |
| * # reference. |
| * @serial |
| */ |
| private String ref; |
| |
| /** |
| * The host's IP address, used in equals and hashCode. |
| * Computed on demand. An uninitialized or unknown hostAddress is null. |
| */ |
| transient InetAddress hostAddress; |
| |
| /** |
| * The URLStreamHandler for this URL. |
| */ |
| transient URLStreamHandler handler; |
| |
| /* Our hash code. |
| * @serial |
| */ |
| private int hashCode = -1; |
| |
| private transient UrlDeserializedState tempState; |
| |
| /** |
| * Creates a {@code URL} object from the specified |
| * {@code protocol}, {@code host}, {@code port} |
| * number, and {@code file}.<p> |
| * |
| * {@code host} can be expressed as a host name or a literal |
| * IP address. If IPv6 literal address is used, it should be |
| * enclosed in square brackets ({@code '['} and {@code ']'}), as |
| * specified by <a |
| * href="http://www.ietf.org/rfc/rfc2732.txt">RFC 2732</a>; |
| * However, the literal IPv6 address format defined in <a |
| * href="http://www.ietf.org/rfc/rfc2373.txt"><i>RFC 2373: IP |
| * Version 6 Addressing Architecture</i></a> is also accepted.<p> |
| * |
| * Specifying a {@code port} number of {@code -1} |
| * indicates that the URL should use the default port for the |
| * protocol.<p> |
| * |
| * If this is the first URL object being created with the specified |
| * protocol, a <i>stream protocol handler</i> object, an instance of |
| * class {@code URLStreamHandler}, is created for that protocol: |
| * <ol> |
| * <li>If the application has previously set up an instance of |
| * {@code URLStreamHandlerFactory} as the stream handler factory, |
| * then the {@code createURLStreamHandler} method of that instance |
| * is called with the protocol string as an argument to create the |
| * stream protocol handler. |
| * <li>If no {@code URLStreamHandlerFactory} has yet been set up, |
| * or if the factory's {@code createURLStreamHandler} method |
| * returns {@code null}, then the {@linkplain java.util.ServiceLoader |
| * ServiceLoader} mechanism is used to locate {@linkplain |
| * java.net.spi.URLStreamHandlerProvider URLStreamHandlerProvider} |
| * implementations using the system class |
| * loader. The order that providers are located is implementation |
| * specific, and an implementation is free to cache the located |
| * providers. A {@linkplain java.util.ServiceConfigurationError |
| * ServiceConfigurationError}, {@code Error} or {@code RuntimeException} |
| * thrown from the {@code createURLStreamHandler}, if encountered, will |
| * be propagated to the calling thread. The {@code |
| * createURLStreamHandler} method of each provider, if instantiated, is |
| * invoked, with the protocol string, until a provider returns non-null, |
| * or all providers have been exhausted. |
| * <li>If the previous step fails to find a protocol handler, the |
| * constructor reads the value of the system property: |
| * <blockquote>{@systemProperty |
| * java.protocol.handler.pkgs |
| * }</blockquote> |
| * If the value of that system property is not {@code null}, |
| * it is interpreted as a list of packages separated by a vertical |
| * slash character '{@code |}'. The constructor tries to load |
| * the class named: |
| * <blockquote>{@code |
| * <package>.<protocol>.Handler |
| * }</blockquote> |
| * where {@code <package>} is replaced by the name of the package |
| * and {@code <protocol>} is replaced by the name of the protocol. |
| * If this class does not exist, or if the class exists but it is not |
| * a subclass of {@code URLStreamHandler}, then the next package |
| * in the list is tried. |
| * <li>If the previous step fails to find a protocol handler, then the |
| * constructor tries to load a built-in protocol handler. |
| * If this class does not exist, or if the class exists but it is not a |
| * subclass of {@code URLStreamHandler}, then a |
| * {@code MalformedURLException} is thrown. |
| * </ol> |
| * |
| * <p>Protocol handlers for the following protocols are guaranteed |
| * to exist on the search path :- |
| * <blockquote><pre> |
| * http, https, file, and jar |
| * </pre></blockquote> |
| * Protocol handlers for additional protocols may also be available. |
| * Some protocol handlers, for example those used for loading platform |
| * classes or classes on the class path, may not be overridden. The details |
| * of such restrictions, and when those restrictions apply (during |
| * initialization of the runtime for example), are implementation specific |
| * and therefore not specified |
| * |
| * <p>No validation of the inputs is performed by this constructor. |
| * |
| * @param protocol the name of the protocol to use. |
| * @param host the name of the host. |
| * @param port the port number on the host. |
| * @param file the file on the host |
| * @exception MalformedURLException if an unknown protocol or the port |
| * is a negative number other than -1 |
| * @see java.lang.System#getProperty(java.lang.String) |
| * @see java.net.URL#setURLStreamHandlerFactory( |
| * java.net.URLStreamHandlerFactory) |
| * @see java.net.URLStreamHandler |
| * @see java.net.URLStreamHandlerFactory#createURLStreamHandler( |
| * java.lang.String) |
| */ |
| public URL(String protocol, String host, int port, String file) |
| throws MalformedURLException |
| { |
| this(protocol, host, port, file, null); |
| } |
| |
| /** |
| * Creates a URL from the specified {@code protocol} |
| * name, {@code host} name, and {@code file} name. The |
| * default port for the specified protocol is used. |
| * <p> |
| * This constructor is equivalent to the four-argument |
| * constructor with the only difference of using the |
| * default port for the specified protocol. |
| * |
| * No validation of the inputs is performed by this constructor. |
| * |
| * @param protocol the name of the protocol to use. |
| * @param host the name of the host. |
| * @param file the file on the host. |
| * @exception MalformedURLException if an unknown protocol is specified. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, |
| * int, java.lang.String) |
| */ |
| public URL(String protocol, String host, String file) |
| throws MalformedURLException { |
| this(protocol, host, -1, file); |
| } |
| |
| /** |
| * Creates a {@code URL} object from the specified |
| * {@code protocol}, {@code host}, {@code port} |
| * number, {@code file}, and {@code handler}. Specifying |
| * a {@code port} number of {@code -1} indicates that |
| * the URL should use the default port for the protocol. Specifying |
| * a {@code handler} of {@code null} indicates that the URL |
| * should use a default stream handler for the protocol, as outlined |
| * for: |
| * java.net.URL#URL(java.lang.String, java.lang.String, int, |
| * java.lang.String) |
| * |
| * <p>If the handler is not null and there is a security manager, |
| * the security manager's {@code checkPermission} |
| * method is called with a |
| * {@code NetPermission("specifyStreamHandler")} permission. |
| * This may result in a SecurityException. |
| * |
| * No validation of the inputs is performed by this constructor. |
| * |
| * @param protocol the name of the protocol to use. |
| * @param host the name of the host. |
| * @param port the port number on the host. |
| * @param file the file on the host |
| * @param handler the stream handler for the URL. |
| * @exception MalformedURLException if an unknown protocol or the port |
| is a negative number other than -1 |
| * @exception SecurityException |
| * if a security manager exists and its |
| * {@code checkPermission} method doesn't allow |
| * specifying a stream handler explicitly. |
| * @see java.lang.System#getProperty(java.lang.String) |
| * @see java.net.URL#setURLStreamHandlerFactory( |
| * java.net.URLStreamHandlerFactory) |
| * @see java.net.URLStreamHandler |
| * @see java.net.URLStreamHandlerFactory#createURLStreamHandler( |
| * java.lang.String) |
| * @see SecurityManager#checkPermission |
| * @see java.net.NetPermission |
| */ |
| public URL(String protocol, String host, int port, String file, |
| URLStreamHandler handler) throws MalformedURLException { |
| if (handler != null) { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| // check for permission to specify a handler |
| checkSpecifyHandler(sm); |
| } |
| } |
| |
| protocol = toLowerCase(protocol); |
| this.protocol = protocol; |
| if (host != null) { |
| |
| /** |
| * if host is a literal IPv6 address, |
| * we will make it conform to RFC 2732 |
| */ |
| if (host.indexOf(':') >= 0 && !host.startsWith("[")) { |
| host = "["+host+"]"; |
| } |
| this.host = host; |
| |
| if (port < -1) { |
| throw new MalformedURLException("Invalid port number :" + |
| port); |
| } |
| this.port = port; |
| authority = (port == -1) ? host : host + ":" + port; |
| } |
| |
| int index = file.indexOf('#'); |
| this.ref = index < 0 ? null : file.substring(index + 1); |
| file = index < 0 ? file : file.substring(0, index); |
| int q = file.lastIndexOf('?'); |
| if (q != -1) { |
| this.query = file.substring(q + 1); |
| this.path = file.substring(0, q); |
| this.file = path + "?" + query; |
| } else { |
| this.path = file; |
| this.file = path; |
| } |
| |
| // Note: we don't do validation of the URL here. Too risky to change |
| // right now, but worth considering for future reference. -br |
| if (handler == null && |
| (handler = getURLStreamHandler(protocol)) == null) { |
| throw new MalformedURLException("unknown protocol: " + protocol); |
| } |
| this.handler = handler; |
| } |
| |
| /** |
| * Creates a {@code URL} object from the {@code String} |
| * representation. |
| * <p> |
| * This constructor is equivalent to a call to the two-argument |
| * constructor with a {@code null} first argument. |
| * |
| * @param spec the {@code String} to parse as a URL. |
| * @exception MalformedURLException if no protocol is specified, or an |
| * unknown protocol is found, or {@code spec} is {@code null}, |
| * or the parsed URL fails to comply with the specific syntax |
| * of the associated protocol. |
| * @see java.net.URL#URL(java.net.URL, java.lang.String) |
| */ |
| public URL(String spec) throws MalformedURLException { |
| this(null, spec); |
| } |
| |
| /** |
| * Creates a URL by parsing the given spec within a specified context. |
| * |
| * The new URL is created from the given context URL and the spec |
| * argument as described in |
| * RFC2396 "Uniform Resource Identifiers : Generic * Syntax" : |
| * <blockquote><pre> |
| * <scheme>://<authority><path>?<query>#<fragment> |
| * </pre></blockquote> |
| * The reference is parsed into the scheme, authority, path, query and |
| * fragment parts. If the path component is empty and the scheme, |
| * authority, and query components are undefined, then the new URL is a |
| * reference to the current document. Otherwise, the fragment and query |
| * parts present in the spec are used in the new URL. |
| * <p> |
| * If the scheme component is defined in the given spec and does not match |
| * the scheme of the context, then the new URL is created as an absolute |
| * URL based on the spec alone. Otherwise the scheme component is inherited |
| * from the context URL. |
| * <p> |
| * If the authority component is present in the spec then the spec is |
| * treated as absolute and the spec authority and path will replace the |
| * context authority and path. If the authority component is absent in the |
| * spec then the authority of the new URL will be inherited from the |
| * context. |
| * <p> |
| * If the spec's path component begins with a slash character |
| * "/" then the |
| * path is treated as absolute and the spec path replaces the context path. |
| * <p> |
| * Otherwise, the path is treated as a relative path and is appended to the |
| * context path, as described in RFC2396. Also, in this case, |
| * the path is canonicalized through the removal of directory |
| * changes made by occurrences of ".." and ".". |
| * <p> |
| * For a more detailed description of URL parsing, refer to RFC2396. |
| * |
| * @param context the context in which to parse the specification. |
| * @param spec the {@code String} to parse as a URL. |
| * @exception MalformedURLException if no protocol is specified, or an |
| * unknown protocol is found, or {@code spec} is {@code null}, |
| * or the parsed URL fails to comply with the specific syntax |
| * of the associated protocol. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, |
| * int, java.lang.String) |
| * @see java.net.URLStreamHandler |
| * @see java.net.URLStreamHandler#parseURL(java.net.URL, |
| * java.lang.String, int, int) |
| */ |
| public URL(URL context, String spec) throws MalformedURLException { |
| this(context, spec, null); |
| } |
| |
| /** |
| * Creates a URL by parsing the given spec with the specified handler |
| * within a specified context. If the handler is null, the parsing |
| * occurs as with the two argument constructor. |
| * |
| * @param context the context in which to parse the specification. |
| * @param spec the {@code String} to parse as a URL. |
| * @param handler the stream handler for the URL. |
| * @exception MalformedURLException if no protocol is specified, or an |
| * unknown protocol is found, or {@code spec} is {@code null}, |
| * or the parsed URL fails to comply with the specific syntax |
| * of the associated protocol. |
| * @exception SecurityException |
| * if a security manager exists and its |
| * {@code checkPermission} method doesn't allow |
| * specifying a stream handler. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, |
| * int, java.lang.String) |
| * @see java.net.URLStreamHandler |
| * @see java.net.URLStreamHandler#parseURL(java.net.URL, |
| * java.lang.String, int, int) |
| */ |
| public URL(URL context, String spec, URLStreamHandler handler) |
| throws MalformedURLException |
| { |
| String original = spec; |
| int i, limit, c; |
| int start = 0; |
| String newProtocol = null; |
| boolean aRef=false; |
| boolean isRelative = false; |
| |
| // Check for permission to specify a handler |
| if (handler != null) { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| checkSpecifyHandler(sm); |
| } |
| } |
| |
| try { |
| limit = spec.length(); |
| while ((limit > 0) && (spec.charAt(limit - 1) <= ' ')) { |
| limit--; //eliminate trailing whitespace |
| } |
| while ((start < limit) && (spec.charAt(start) <= ' ')) { |
| start++; // eliminate leading whitespace |
| } |
| |
| if (spec.regionMatches(true, start, "url:", 0, 4)) { |
| start += 4; |
| } |
| if (start < spec.length() && spec.charAt(start) == '#') { |
| /* we're assuming this is a ref relative to the context URL. |
| * This means protocols cannot start w/ '#', but we must parse |
| * ref URL's like: "hello:there" w/ a ':' in them. |
| */ |
| aRef=true; |
| } |
| for (i = start ; !aRef && (i < limit) && |
| ((c = spec.charAt(i)) != '/') ; i++) { |
| if (c == ':') { |
| String s = toLowerCase(spec.substring(start, i)); |
| if (isValidProtocol(s)) { |
| newProtocol = s; |
| start = i + 1; |
| } |
| break; |
| } |
| } |
| |
| // Only use our context if the protocols match. |
| protocol = newProtocol; |
| if ((context != null) && ((newProtocol == null) || |
| newProtocol.equalsIgnoreCase(context.protocol))) { |
| // inherit the protocol handler from the context |
| // if not specified to the constructor |
| if (handler == null) { |
| handler = context.handler; |
| } |
| |
| // If the context is a hierarchical URL scheme and the spec |
| // contains a matching scheme then maintain backwards |
| // compatibility and treat it as if the spec didn't contain |
| // the scheme; see 5.2.3 of RFC2396 |
| if (context.path != null && context.path.startsWith("/")) |
| newProtocol = null; |
| |
| if (newProtocol == null) { |
| protocol = context.protocol; |
| authority = context.authority; |
| userInfo = context.userInfo; |
| host = context.host; |
| port = context.port; |
| file = context.file; |
| path = context.path; |
| isRelative = true; |
| } |
| } |
| |
| if (protocol == null) { |
| throw new MalformedURLException("no protocol: "+original); |
| } |
| |
| // Get the protocol handler if not specified or the protocol |
| // of the context could not be used |
| if (handler == null && |
| (handler = getURLStreamHandler(protocol)) == null) { |
| throw new MalformedURLException("unknown protocol: "+protocol); |
| } |
| |
| this.handler = handler; |
| |
| i = spec.indexOf('#', start); |
| if (i >= 0) { |
| ref = spec.substring(i + 1, limit); |
| limit = i; |
| } |
| |
| /* |
| * Handle special case inheritance of query and fragment |
| * implied by RFC2396 section 5.2.2. |
| */ |
| if (isRelative && start == limit) { |
| query = context.query; |
| if (ref == null) { |
| ref = context.ref; |
| } |
| } |
| |
| handler.parseURL(this, spec, start, limit); |
| |
| } catch(MalformedURLException e) { |
| throw e; |
| } catch(Exception e) { |
| MalformedURLException exception = new MalformedURLException(e.getMessage()); |
| exception.initCause(e); |
| throw exception; |
| } |
| } |
| |
| /** |
| * Creates a URL from a URI, as if by invoking {@code uri.toURL()}. |
| * |
| * @see java.net.URI#toURL() |
| */ |
| static URL fromURI(URI uri) throws MalformedURLException { |
| if (!uri.isAbsolute()) { |
| throw new IllegalArgumentException("URI is not absolute"); |
| } |
| String protocol = uri.getScheme(); |
| |
| // In general we need to go via Handler.parseURL, but for the jrt |
| // protocol we enforce that the Handler is not overrideable and can |
| // optimize URI to URL conversion. |
| // |
| // Case-sensitive comparison for performance; malformed protocols will |
| // be handled correctly by the slow path. |
| if (protocol.equals("jrt") && !uri.isOpaque() |
| && uri.getRawFragment() == null) { |
| |
| String query = uri.getRawQuery(); |
| String path = uri.getRawPath(); |
| String file = (query == null) ? path : path + "?" + query; |
| |
| // URL represent undefined host as empty string while URI use null |
| String host = uri.getHost(); |
| if (host == null) { |
| host = ""; |
| } |
| |
| int port = uri.getPort(); |
| |
| return new URL("jrt", host, port, file, null); |
| } else { |
| return new URL((URL)null, uri.toString(), null); |
| } |
| } |
| |
| /* |
| * Returns true if specified string is a valid protocol name. |
| */ |
| private boolean isValidProtocol(String protocol) { |
| int len = protocol.length(); |
| if (len < 1) |
| return false; |
| char c = protocol.charAt(0); |
| if (!Character.isLetter(c)) |
| return false; |
| for (int i = 1; i < len; i++) { |
| c = protocol.charAt(i); |
| if (!Character.isLetterOrDigit(c) && c != '.' && c != '+' && |
| c != '-') { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /* |
| * Checks for permission to specify a stream handler. |
| */ |
| private void checkSpecifyHandler(SecurityManager sm) { |
| sm.checkPermission(SecurityConstants.SPECIFY_HANDLER_PERMISSION); |
| } |
| |
| /** |
| * Sets the fields of the URL. This is not a public method so that |
| * only URLStreamHandlers can modify URL fields. URLs are |
| * otherwise constant. |
| * |
| * @param protocol the name of the protocol to use |
| * @param host the name of the host |
| @param port the port number on the host |
| * @param file the file on the host |
| * @param ref the internal reference in the URL |
| */ |
| void set(String protocol, String host, int port, |
| String file, String ref) { |
| synchronized (this) { |
| this.protocol = protocol; |
| this.host = host; |
| authority = port == -1 ? host : host + ":" + port; |
| this.port = port; |
| this.file = file; |
| this.ref = ref; |
| /* This is very important. We must recompute this after the |
| * URL has been changed. */ |
| hashCode = -1; |
| hostAddress = null; |
| int q = file.lastIndexOf('?'); |
| if (q != -1) { |
| query = file.substring(q+1); |
| path = file.substring(0, q); |
| } else |
| path = file; |
| } |
| } |
| |
| /** |
| * Sets the specified 8 fields of the URL. This is not a public method so |
| * that only URLStreamHandlers can modify URL fields. URLs are otherwise |
| * constant. |
| * |
| * @param protocol the name of the protocol to use |
| * @param host the name of the host |
| * @param port the port number on the host |
| * @param authority the authority part for the url |
| * @param userInfo the username and password |
| * @param path the file on the host |
| * @param ref the internal reference in the URL |
| * @param query the query part of this URL |
| * @since 1.3 |
| */ |
| void set(String protocol, String host, int port, |
| String authority, String userInfo, String path, |
| String query, String ref) { |
| synchronized (this) { |
| this.protocol = protocol; |
| this.host = host; |
| this.port = port; |
| this.file = query == null ? path : path + "?" + query; |
| this.userInfo = userInfo; |
| this.path = path; |
| this.ref = ref; |
| /* This is very important. We must recompute this after the |
| * URL has been changed. */ |
| hashCode = -1; |
| hostAddress = null; |
| this.query = query; |
| this.authority = authority; |
| } |
| } |
| |
| /** |
| * Gets the query part of this {@code URL}. |
| * |
| * @return the query part of this {@code URL}, |
| * or <CODE>null</CODE> if one does not exist |
| * @since 1.3 |
| */ |
| public String getQuery() { |
| return query; |
| } |
| |
| /** |
| * Gets the path part of this {@code URL}. |
| * |
| * @return the path part of this {@code URL}, or an |
| * empty string if one does not exist |
| * @since 1.3 |
| */ |
| public String getPath() { |
| return path; |
| } |
| |
| /** |
| * Gets the userInfo part of this {@code URL}. |
| * |
| * @return the userInfo part of this {@code URL}, or |
| * <CODE>null</CODE> if one does not exist |
| * @since 1.3 |
| */ |
| public String getUserInfo() { |
| return userInfo; |
| } |
| |
| /** |
| * Gets the authority part of this {@code URL}. |
| * |
| * @return the authority part of this {@code URL} |
| * @since 1.3 |
| */ |
| public String getAuthority() { |
| return authority; |
| } |
| |
| /** |
| * Gets the port number of this {@code URL}. |
| * |
| * @return the port number, or -1 if the port is not set |
| */ |
| public int getPort() { |
| return port; |
| } |
| |
| /** |
| * Gets the default port number of the protocol associated |
| * with this {@code URL}. If the URL scheme or the URLStreamHandler |
| * for the URL do not define a default port number, |
| * then -1 is returned. |
| * |
| * @return the port number |
| * @since 1.4 |
| */ |
| public int getDefaultPort() { |
| return handler.getDefaultPort(); |
| } |
| |
| /** |
| * Gets the protocol name of this {@code URL}. |
| * |
| * @return the protocol of this {@code URL}. |
| */ |
| public String getProtocol() { |
| return protocol; |
| } |
| |
| /** |
| * Gets the host name of this {@code URL}, if applicable. |
| * The format of the host conforms to RFC 2732, i.e. for a |
| * literal IPv6 address, this method will return the IPv6 address |
| * enclosed in square brackets ({@code '['} and {@code ']'}). |
| * |
| * @return the host name of this {@code URL}. |
| */ |
| public String getHost() { |
| return host; |
| } |
| |
| /** |
| * Gets the file name of this {@code URL}. |
| * The returned file portion will be |
| * the same as <CODE>getPath()</CODE>, plus the concatenation of |
| * the value of <CODE>getQuery()</CODE>, if any. If there is |
| * no query portion, this method and <CODE>getPath()</CODE> will |
| * return identical results. |
| * |
| * @return the file name of this {@code URL}, |
| * or an empty string if one does not exist |
| */ |
| public String getFile() { |
| return file; |
| } |
| |
| /** |
| * Gets the anchor (also known as the "reference") of this |
| * {@code URL}. |
| * |
| * @return the anchor (also known as the "reference") of this |
| * {@code URL}, or <CODE>null</CODE> if one does not exist |
| */ |
| public String getRef() { |
| return ref; |
| } |
| |
| /** |
| * Compares this URL for equality with another object.<p> |
| * |
| * If the given object is not a URL then this method immediately returns |
| * {@code false}.<p> |
| * |
| * Two URL objects are equal if they have the same protocol, reference |
| * equivalent hosts, have the same port number on the host, and the same |
| * file and fragment of the file.<p> |
| * |
| * Two hosts are considered equivalent if both host names can be resolved |
| * into the same IP addresses; else if either host name can't be |
| * resolved, the host names must be equal without regard to case; or both |
| * host names equal to null.<p> |
| * |
| * Since hosts comparison requires name resolution, this operation is a |
| * blocking operation. <p> |
| * |
| * Note: The defined behavior for {@code equals} is known to |
| * be inconsistent with virtual hosting in HTTP. |
| * |
| * @param obj the URL to compare against. |
| * @return {@code true} if the objects are the same; |
| * {@code false} otherwise. |
| */ |
| public boolean equals(Object obj) { |
| if (!(obj instanceof URL)) |
| return false; |
| URL u2 = (URL)obj; |
| |
| return handler.equals(this, u2); |
| } |
| |
| /** |
| * Creates an integer suitable for hash table indexing.<p> |
| * |
| * The hash code is based upon all the URL components relevant for URL |
| * comparison. As such, this operation is a blocking operation. |
| * |
| * @return a hash code for this {@code URL}. |
| */ |
| public synchronized int hashCode() { |
| if (hashCode != -1) |
| return hashCode; |
| |
| hashCode = handler.hashCode(this); |
| return hashCode; |
| } |
| |
| /** |
| * Compares two URLs, excluding the fragment component.<p> |
| * |
| * Returns {@code true} if this {@code URL} and the |
| * {@code other} argument are equal without taking the |
| * fragment component into consideration. |
| * |
| * @param other the {@code URL} to compare against. |
| * @return {@code true} if they reference the same remote object; |
| * {@code false} otherwise. |
| */ |
| public boolean sameFile(URL other) { |
| return handler.sameFile(this, other); |
| } |
| |
| /** |
| * Constructs a string representation of this {@code URL}. The |
| * string is created by calling the {@code toExternalForm} |
| * method of the stream protocol handler for this object. |
| * |
| * @return a string representation of this object. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, int, |
| * java.lang.String) |
| * @see java.net.URLStreamHandler#toExternalForm(java.net.URL) |
| */ |
| public String toString() { |
| return toExternalForm(); |
| } |
| |
| /** |
| * Constructs a string representation of this {@code URL}. The |
| * string is created by calling the {@code toExternalForm} |
| * method of the stream protocol handler for this object. |
| * |
| * @return a string representation of this object. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, |
| * int, java.lang.String) |
| * @see java.net.URLStreamHandler#toExternalForm(java.net.URL) |
| */ |
| public String toExternalForm() { |
| return handler.toExternalForm(this); |
| } |
| |
| /** |
| * Returns a {@link java.net.URI} equivalent to this URL. |
| * This method functions in the same way as {@code new URI (this.toString())}. |
| * <p>Note, any URL instance that complies with RFC 2396 can be converted |
| * to a URI. However, some URLs that are not strictly in compliance |
| * can not be converted to a URI. |
| * |
| * @exception URISyntaxException if this URL is not formatted strictly according to |
| * RFC2396 and cannot be converted to a URI. |
| * |
| * @return a URI instance equivalent to this URL. |
| * @since 1.5 |
| */ |
| public URI toURI() throws URISyntaxException { |
| return new URI (toString()); |
| } |
| |
| /** |
| * Returns a {@link java.net.URLConnection URLConnection} instance that |
| * represents a connection to the remote object referred to by the |
| * {@code URL}. |
| * |
| * <P>A new instance of {@linkplain java.net.URLConnection URLConnection} is |
| * created every time when invoking the |
| * {@linkplain java.net.URLStreamHandler#openConnection(URL) |
| * URLStreamHandler.openConnection(URL)} method of the protocol handler for |
| * this URL.</P> |
| * |
| * <P>It should be noted that a URLConnection instance does not establish |
| * the actual network connection on creation. This will happen only when |
| * calling {@linkplain java.net.URLConnection#connect() URLConnection.connect()}.</P> |
| * |
| * <P>If for the URL's protocol (such as HTTP or JAR), there |
| * exists a public, specialized URLConnection subclass belonging |
| * to one of the following packages or one of their subpackages: |
| * java.lang, java.io, java.util, java.net, the connection |
| * returned will be of that subclass. For example, for HTTP an |
| * HttpURLConnection will be returned, and for JAR a |
| * JarURLConnection will be returned.</P> |
| * |
| * @return a {@link java.net.URLConnection URLConnection} linking |
| * to the URL. |
| * @exception IOException if an I/O exception occurs. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, |
| * int, java.lang.String) |
| */ |
| public URLConnection openConnection() throws java.io.IOException { |
| return handler.openConnection(this); |
| } |
| |
| /** |
| * Same as {@link #openConnection()}, except that the connection will be |
| * made through the specified proxy; Protocol handlers that do not |
| * support proxying will ignore the proxy parameter and make a |
| * normal connection. |
| * |
| * Invoking this method preempts the system's default |
| * {@link java.net.ProxySelector ProxySelector} settings. |
| * |
| * @param proxy the Proxy through which this connection |
| * will be made. If direct connection is desired, |
| * Proxy.NO_PROXY should be specified. |
| * @return a {@code URLConnection} to the URL. |
| * @exception IOException if an I/O exception occurs. |
| * @exception SecurityException if a security manager is present |
| * and the caller doesn't have permission to connect |
| * to the proxy. |
| * @exception IllegalArgumentException will be thrown if proxy is null, |
| * or proxy has the wrong type |
| * @exception UnsupportedOperationException if the subclass that |
| * implements the protocol handler doesn't support |
| * this method. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, |
| * int, java.lang.String) |
| * @see java.net.URLConnection |
| * @see java.net.URLStreamHandler#openConnection(java.net.URL, |
| * java.net.Proxy) |
| * @since 1.5 |
| */ |
| public URLConnection openConnection(Proxy proxy) |
| throws java.io.IOException { |
| if (proxy == null) { |
| throw new IllegalArgumentException("proxy can not be null"); |
| } |
| |
| // Create a copy of Proxy as a security measure |
| Proxy p = proxy == Proxy.NO_PROXY ? Proxy.NO_PROXY : sun.net.ApplicationProxy.create(proxy); |
| SecurityManager sm = System.getSecurityManager(); |
| if (p.type() != Proxy.Type.DIRECT && sm != null) { |
| InetSocketAddress epoint = (InetSocketAddress) p.address(); |
| if (epoint.isUnresolved()) |
| sm.checkConnect(epoint.getHostName(), epoint.getPort()); |
| else |
| sm.checkConnect(epoint.getAddress().getHostAddress(), |
| epoint.getPort()); |
| } |
| return handler.openConnection(this, p); |
| } |
| |
| /** |
| * Opens a connection to this {@code URL} and returns an |
| * {@code InputStream} for reading from that connection. This |
| * method is a shorthand for: |
| * <blockquote><pre> |
| * openConnection().getInputStream() |
| * </pre></blockquote> |
| * |
| * @return an input stream for reading from the URL connection. |
| * @exception IOException if an I/O exception occurs. |
| * @see java.net.URL#openConnection() |
| * @see java.net.URLConnection#getInputStream() |
| */ |
| public final InputStream openStream() throws java.io.IOException { |
| return openConnection().getInputStream(); |
| } |
| |
| /** |
| * Gets the contents of this URL. This method is a shorthand for: |
| * <blockquote><pre> |
| * openConnection().getContent() |
| * </pre></blockquote> |
| * |
| * @return the contents of this URL. |
| * @exception IOException if an I/O exception occurs. |
| * @see java.net.URLConnection#getContent() |
| */ |
| public final Object getContent() throws java.io.IOException { |
| return openConnection().getContent(); |
| } |
| |
| /** |
| * Gets the contents of this URL. This method is a shorthand for: |
| * <blockquote><pre> |
| * openConnection().getContent(classes) |
| * </pre></blockquote> |
| * |
| * @param classes an array of Java types |
| * @return the content object of this URL that is the first match of |
| * the types specified in the classes array. |
| * null if none of the requested types are supported. |
| * @exception IOException if an I/O exception occurs. |
| * @see java.net.URLConnection#getContent(Class[]) |
| * @since 1.3 |
| */ |
| public final Object getContent(Class<?>[] classes) |
| throws java.io.IOException { |
| return openConnection().getContent(classes); |
| } |
| |
| /** |
| * The URLStreamHandler factory. |
| */ |
| private static volatile URLStreamHandlerFactory factory; |
| |
| /** |
| * Sets an application's {@code URLStreamHandlerFactory}. |
| * This method can be called at most once in a given Java Virtual |
| * Machine. |
| * |
| *<p> The {@code URLStreamHandlerFactory} instance is used to |
| *construct a stream protocol handler from a protocol name. |
| * |
| * <p> If there is a security manager, this method first calls |
| * the security manager's {@code checkSetFactory} method |
| * to ensure the operation is allowed. |
| * This could result in a SecurityException. |
| * |
| * @param fac the desired factory. |
| * @exception Error if the application has already set a factory. |
| * @exception SecurityException if a security manager exists and its |
| * {@code checkSetFactory} method doesn't allow |
| * the operation. |
| * @see java.net.URL#URL(java.lang.String, java.lang.String, |
| * int, java.lang.String) |
| * @see java.net.URLStreamHandlerFactory |
| * @see SecurityManager#checkSetFactory |
| */ |
| public static void setURLStreamHandlerFactory(URLStreamHandlerFactory fac) { |
| synchronized (streamHandlerLock) { |
| if (factory != null) { |
| throw new Error("factory already defined"); |
| } |
| SecurityManager security = System.getSecurityManager(); |
| if (security != null) { |
| security.checkSetFactory(); |
| } |
| handlers.clear(); |
| |
| // safe publication of URLStreamHandlerFactory with volatile write |
| factory = fac; |
| } |
| } |
| |
| private static final URLStreamHandlerFactory defaultFactory = new DefaultFactory(); |
| |
| private static class DefaultFactory implements URLStreamHandlerFactory { |
| private static String PREFIX = "sun.net.www.protocol"; |
| |
| public URLStreamHandler createURLStreamHandler(String protocol) { |
| String name = PREFIX + "." + protocol + ".Handler"; |
| try { |
| @SuppressWarnings("deprecation") |
| Object o = Class.forName(name).newInstance(); |
| return (URLStreamHandler)o; |
| } catch (ClassNotFoundException x) { |
| // ignore |
| } catch (Exception e) { |
| // For compatibility, all Exceptions are ignored. |
| // any number of exceptions can get thrown here |
| } |
| return null; |
| } |
| } |
| |
| private static URLStreamHandler lookupViaProperty(String protocol) { |
| String packagePrefixList = |
| GetPropertyAction.privilegedGetProperty(protocolPathProp); |
| if (packagePrefixList == null) { |
| // not set |
| return null; |
| } |
| |
| String[] packagePrefixes = packagePrefixList.split("\\|"); |
| URLStreamHandler handler = null; |
| for (int i=0; handler == null && i<packagePrefixes.length; i++) { |
| String packagePrefix = packagePrefixes[i].trim(); |
| try { |
| String clsName = packagePrefix + "." + protocol + ".Handler"; |
| Class<?> cls = null; |
| try { |
| cls = Class.forName(clsName); |
| } catch (ClassNotFoundException e) { |
| ClassLoader cl = ClassLoader.getSystemClassLoader(); |
| if (cl != null) { |
| cls = cl.loadClass(clsName); |
| } |
| } |
| if (cls != null) { |
| @SuppressWarnings("deprecation") |
| Object tmp = cls.newInstance(); |
| handler = (URLStreamHandler)tmp; |
| } |
| } catch (Exception e) { |
| // any number of exceptions can get thrown here |
| } |
| } |
| return handler; |
| } |
| |
| private static Iterator<URLStreamHandlerProvider> providers() { |
| return new Iterator<>() { |
| |
| ClassLoader cl = ClassLoader.getSystemClassLoader(); |
| ServiceLoader<URLStreamHandlerProvider> sl = |
| ServiceLoader.load(URLStreamHandlerProvider.class, cl); |
| Iterator<URLStreamHandlerProvider> i = sl.iterator(); |
| |
| URLStreamHandlerProvider next = null; |
| |
| private boolean getNext() { |
| while (next == null) { |
| try { |
| if (!i.hasNext()) |
| return false; |
| next = i.next(); |
| } catch (ServiceConfigurationError sce) { |
| if (sce.getCause() instanceof SecurityException) { |
| // Ignore security exceptions |
| continue; |
| } |
| throw sce; |
| } |
| } |
| return true; |
| } |
| |
| public boolean hasNext() { |
| return getNext(); |
| } |
| |
| public URLStreamHandlerProvider next() { |
| if (!getNext()) |
| throw new NoSuchElementException(); |
| URLStreamHandlerProvider n = next; |
| next = null; |
| return n; |
| } |
| }; |
| } |
| |
| // Thread-local gate to prevent recursive provider lookups |
| private static ThreadLocal<Object> gate = new ThreadLocal<>(); |
| |
| private static URLStreamHandler lookupViaProviders(final String protocol) { |
| if (gate.get() != null) |
| throw new Error("Circular loading of URL stream handler providers detected"); |
| |
| gate.set(gate); |
| try { |
| return AccessController.doPrivileged( |
| new PrivilegedAction<>() { |
| public URLStreamHandler run() { |
| Iterator<URLStreamHandlerProvider> itr = providers(); |
| while (itr.hasNext()) { |
| URLStreamHandlerProvider f = itr.next(); |
| URLStreamHandler h = f.createURLStreamHandler(protocol); |
| if (h != null) |
| return h; |
| } |
| return null; |
| } |
| }); |
| } finally { |
| gate.set(null); |
| } |
| } |
| |
| /** |
| * Returns the protocol in lower case. Special cases known protocols |
| * to avoid loading locale classes during startup. |
| */ |
| static String toLowerCase(String protocol) { |
| if (protocol.equals("jrt") || protocol.equals("file") || protocol.equals("jar")) { |
| return protocol; |
| } else { |
| return protocol.toLowerCase(Locale.ROOT); |
| } |
| } |
| |
| /** |
| * Non-overrideable protocols: "jrt" and "file" |
| * |
| * Character-based comparison for performance reasons; also ensures |
| * case-insensitive comparison in a locale-independent fashion. |
| */ |
| static boolean isOverrideable(String protocol) { |
| if (protocol.length() == 3) { |
| if ((Character.toLowerCase(protocol.charAt(0)) == 'j') && |
| (Character.toLowerCase(protocol.charAt(1)) == 'r') && |
| (Character.toLowerCase(protocol.charAt(2)) == 't')) { |
| return false; |
| } |
| } else if (protocol.length() == 4) { |
| if ((Character.toLowerCase(protocol.charAt(0)) == 'f') && |
| (Character.toLowerCase(protocol.charAt(1)) == 'i') && |
| (Character.toLowerCase(protocol.charAt(2)) == 'l') && |
| (Character.toLowerCase(protocol.charAt(3)) == 'e')) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * A table of protocol handlers. |
| */ |
| static Hashtable<String,URLStreamHandler> handlers = new Hashtable<>(); |
| private static final Object streamHandlerLock = new Object(); |
| |
| /** |
| * Returns the Stream Handler. |
| * @param protocol the protocol to use |
| */ |
| static URLStreamHandler getURLStreamHandler(String protocol) { |
| |
| URLStreamHandler handler = handlers.get(protocol); |
| |
| if (handler != null) { |
| return handler; |
| } |
| |
| URLStreamHandlerFactory fac; |
| boolean checkedWithFactory = false; |
| |
| if (isOverrideable(protocol) && jdk.internal.misc.VM.isBooted()) { |
| // Use the factory (if any). Volatile read makes |
| // URLStreamHandlerFactory appear fully initialized to current thread. |
| fac = factory; |
| if (fac != null) { |
| handler = fac.createURLStreamHandler(protocol); |
| checkedWithFactory = true; |
| } |
| |
| if (handler == null && !protocol.equalsIgnoreCase("jar")) { |
| handler = lookupViaProviders(protocol); |
| } |
| |
| if (handler == null) { |
| handler = lookupViaProperty(protocol); |
| } |
| } |
| |
| if (handler == null) { |
| // Try the built-in protocol handler |
| handler = defaultFactory.createURLStreamHandler(protocol); |
| } |
| |
| synchronized (streamHandlerLock) { |
| URLStreamHandler handler2 = null; |
| |
| // Check again with hashtable just in case another |
| // thread created a handler since we last checked |
| handler2 = handlers.get(protocol); |
| |
| if (handler2 != null) { |
| return handler2; |
| } |
| |
| // Check with factory if another thread set a |
| // factory since our last check |
| if (!checkedWithFactory && (fac = factory) != null) { |
| handler2 = fac.createURLStreamHandler(protocol); |
| } |
| |
| if (handler2 != null) { |
| // The handler from the factory must be given more |
| // importance. Discard the default handler that |
| // this thread created. |
| handler = handler2; |
| } |
| |
| // Insert this handler into the hashtable |
| if (handler != null) { |
| handlers.put(protocol, handler); |
| } |
| } |
| return handler; |
| } |
| |
| /** |
| * @serialField protocol String |
| * |
| * @serialField host String |
| * |
| * @serialField port int |
| * |
| * @serialField authority String |
| * |
| * @serialField file String |
| * |
| * @serialField ref String |
| * |
| * @serialField hashCode int |
| * |
| */ |
| private static final ObjectStreamField[] serialPersistentFields = { |
| new ObjectStreamField("protocol", String.class), |
| new ObjectStreamField("host", String.class), |
| new ObjectStreamField("port", int.class), |
| new ObjectStreamField("authority", String.class), |
| new ObjectStreamField("file", String.class), |
| new ObjectStreamField("ref", String.class), |
| new ObjectStreamField("hashCode", int.class), }; |
| |
| /** |
| * WriteObject is called to save the state of the URL to an |
| * ObjectOutputStream. The handler is not saved since it is |
| * specific to this system. |
| * |
| * @serialData the default write object value. When read back in, |
| * the reader must ensure that calling getURLStreamHandler with |
| * the protocol variable returns a valid URLStreamHandler and |
| * throw an IOException if it does not. |
| */ |
| private synchronized void writeObject(java.io.ObjectOutputStream s) |
| throws IOException |
| { |
| s.defaultWriteObject(); // write the fields |
| } |
| |
| /** |
| * readObject is called to restore the state of the URL from the |
| * stream. It reads the components of the URL and finds the local |
| * stream handler. |
| */ |
| private synchronized void readObject(java.io.ObjectInputStream s) |
| throws IOException, ClassNotFoundException { |
| GetField gf = s.readFields(); |
| String protocol = (String)gf.get("protocol", null); |
| if (getURLStreamHandler(protocol) == null) { |
| throw new IOException("unknown protocol: " + protocol); |
| } |
| String host = (String)gf.get("host", null); |
| int port = gf.get("port", -1); |
| String authority = (String)gf.get("authority", null); |
| String file = (String)gf.get("file", null); |
| String ref = (String)gf.get("ref", null); |
| int hashCode = gf.get("hashCode", -1); |
| if (authority == null |
| && ((host != null && !host.isEmpty()) || port != -1)) { |
| if (host == null) |
| host = ""; |
| authority = (port == -1) ? host : host + ":" + port; |
| } |
| tempState = new UrlDeserializedState(protocol, host, port, authority, |
| file, ref, hashCode); |
| } |
| |
| /** |
| * Replaces the de-serialized object with an URL object. |
| * |
| * @return a newly created object from deserialized data |
| * |
| * @throws ObjectStreamException if a new object replacing this |
| * object could not be created |
| */ |
| |
| private Object readResolve() throws ObjectStreamException { |
| |
| URLStreamHandler handler = null; |
| // already been checked in readObject |
| handler = getURLStreamHandler(tempState.getProtocol()); |
| |
| URL replacementURL = null; |
| if (isBuiltinStreamHandler(handler.getClass().getName())) { |
| replacementURL = fabricateNewURL(); |
| } else { |
| replacementURL = setDeserializedFields(handler); |
| } |
| return replacementURL; |
| } |
| |
| private URL setDeserializedFields(URLStreamHandler handler) { |
| URL replacementURL; |
| String userInfo = null; |
| String protocol = tempState.getProtocol(); |
| String host = tempState.getHost(); |
| int port = tempState.getPort(); |
| String authority = tempState.getAuthority(); |
| String file = tempState.getFile(); |
| String ref = tempState.getRef(); |
| int hashCode = tempState.getHashCode(); |
| |
| |
| // Construct authority part |
| if (authority == null |
| && ((host != null && !host.isEmpty()) || port != -1)) { |
| if (host == null) |
| host = ""; |
| authority = (port == -1) ? host : host + ":" + port; |
| |
| // Handle hosts with userInfo in them |
| int at = host.lastIndexOf('@'); |
| if (at != -1) { |
| userInfo = host.substring(0, at); |
| host = host.substring(at+1); |
| } |
| } else if (authority != null) { |
| // Construct user info part |
| int ind = authority.indexOf('@'); |
| if (ind != -1) |
| userInfo = authority.substring(0, ind); |
| } |
| |
| // Construct path and query part |
| String path = null; |
| String query = null; |
| if (file != null) { |
| // Fix: only do this if hierarchical? |
| int q = file.lastIndexOf('?'); |
| if (q != -1) { |
| query = file.substring(q+1); |
| path = file.substring(0, q); |
| } else |
| path = file; |
| } |
| |
| // Set the object fields. |
| this.protocol = protocol; |
| this.host = host; |
| this.port = port; |
| this.file = file; |
| this.authority = authority; |
| this.ref = ref; |
| this.hashCode = hashCode; |
| this.handler = handler; |
| this.query = query; |
| this.path = path; |
| this.userInfo = userInfo; |
| replacementURL = this; |
| return replacementURL; |
| } |
| |
| private URL fabricateNewURL() |
| throws InvalidObjectException { |
| // create URL string from deserialized object |
| URL replacementURL = null; |
| String urlString = tempState.reconstituteUrlString(); |
| |
| try { |
| replacementURL = new URL(urlString); |
| } catch (MalformedURLException mEx) { |
| resetState(); |
| InvalidObjectException invoEx = new InvalidObjectException( |
| "Malformed URL: " + urlString); |
| invoEx.initCause(mEx); |
| throw invoEx; |
| } |
| replacementURL.setSerializedHashCode(tempState.getHashCode()); |
| resetState(); |
| return replacementURL; |
| } |
| |
| private boolean isBuiltinStreamHandler(String handlerClassName) { |
| return (handlerClassName.startsWith(BUILTIN_HANDLERS_PREFIX)); |
| } |
| |
| private void resetState() { |
| this.protocol = null; |
| this.host = null; |
| this.port = -1; |
| this.file = null; |
| this.authority = null; |
| this.ref = null; |
| this.hashCode = -1; |
| this.handler = null; |
| this.query = null; |
| this.path = null; |
| this.userInfo = null; |
| this.tempState = null; |
| } |
| |
| private void setSerializedHashCode(int hc) { |
| this.hashCode = hc; |
| } |
| |
| static { |
| SharedSecrets.setJavaNetURLAccess( |
| new JavaNetURLAccess() { |
| @Override |
| public URLStreamHandler getHandler(URL u) { |
| return u.handler; |
| } |
| } |
| ); |
| } |
| } |
| |
| final class UrlDeserializedState { |
| private final String protocol; |
| private final String host; |
| private final int port; |
| private final String authority; |
| private final String file; |
| private final String ref; |
| private final int hashCode; |
| |
| public UrlDeserializedState(String protocol, |
| String host, int port, |
| String authority, String file, |
| String ref, int hashCode) { |
| this.protocol = protocol; |
| this.host = host; |
| this.port = port; |
| this.authority = authority; |
| this.file = file; |
| this.ref = ref; |
| this.hashCode = hashCode; |
| } |
| |
| String getProtocol() { |
| return protocol; |
| } |
| |
| String getHost() { |
| return host; |
| } |
| |
| String getAuthority () { |
| return authority; |
| } |
| |
| int getPort() { |
| return port; |
| } |
| |
| String getFile () { |
| return file; |
| } |
| |
| String getRef () { |
| return ref; |
| } |
| |
| int getHashCode () { |
| return hashCode; |
| } |
| |
| String reconstituteUrlString() { |
| |
| // pre-compute length of StringBuffer |
| int len = protocol.length() + 1; |
| if (authority != null && !authority.isEmpty()) |
| len += 2 + authority.length(); |
| if (file != null) { |
| len += file.length(); |
| } |
| if (ref != null) |
| len += 1 + ref.length(); |
| StringBuilder result = new StringBuilder(len); |
| result.append(protocol); |
| result.append(":"); |
| if (authority != null && !authority.isEmpty()) { |
| result.append("//"); |
| result.append(authority); |
| } |
| if (file != null) { |
| result.append(file); |
| } |
| if (ref != null) { |
| result.append("#"); |
| result.append(ref); |
| } |
| return result.toString(); |
| } |
| } |
