author | khazra |
Fri, 25 Jan 2013 11:52:10 -0800 | |
changeset 15309 | b585dca79d0b |
parent 14342 | 8435a30053c1 |
child 16055 | 311a101eb72c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1995, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.net; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.util.Hashtable; |
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import java.util.StringTokenizer; |
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import sun.security.util.SecurityConstants; |
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/** |
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* Class <code>URL</code> represents a Uniform Resource |
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* Locator, a pointer to a "resource" on the World |
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* Wide Web. A resource can be something as simple as a file or a |
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* directory, or it can be a reference to a more complicated object, |
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* such as a query to a database or to a search engine. More |
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* information on the types of URLs and their formats can be found at: |
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* <a href= |
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* "http://web.archive.org/web/20051219043731/http://archive.ncsa.uiuc.edu/SDG/Software/Mosaic/Demo/url-primer.html"> |
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* <i>Types of URL</i></a> |
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* <p> |
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* In general, a URL can be broken into several parts. Consider the |
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* following example: |
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* <blockquote><pre> |
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* http://www.example.com/docs/resource1.html |
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* </pre></blockquote> |
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* <p> |
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* The URL above indicates that the protocol to use is |
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* <code>http</code> (HyperText Transfer Protocol) and that the |
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* information resides on a host machine named |
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* <code>www.example.com</code>. The information on that host |
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* machine is named <code>/docs/resource1.html</code>. The exact |
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* meaning of this name on the host machine is both protocol |
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* dependent and host dependent. The information normally resides in |
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* a file, but it could be generated on the fly. This component of |
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* the URL is called the <i>path</i> component. |
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* <p> |
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* A URL can optionally specify a "port", which is the |
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* port number to which the TCP connection is made on the remote host |
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* machine. If the port is not specified, the default port for |
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* the protocol is used instead. For example, the default port for |
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* <code>http</code> is <code>80</code>. An alternative port could be |
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* specified as: |
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* <blockquote><pre> |
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* http://www.example.com:1080/docs/resource1.html |
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* </pre></blockquote> |
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* <p> |
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* The syntax of <code>URL</code> is defined by <a |
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* href="http://www.ietf.org/rfc/rfc2396.txt"><i>RFC 2396: Uniform |
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* Resource Identifiers (URI): Generic Syntax</i></a>, amended by <a |
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* href="http://www.ietf.org/rfc/rfc2732.txt"><i>RFC 2732: Format for |
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* Literal IPv6 Addresses in URLs</i></a>. The Literal IPv6 address format |
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* also supports scope_ids. The syntax and usage of scope_ids is described |
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* <a href="Inet6Address.html#scoped">here</a>. |
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* <p> |
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* A URL may have appended to it a "fragment", also known |
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* as a "ref" or a "reference". The fragment is indicated by the sharp |
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* sign character "#" followed by more characters. For example, |
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* <blockquote><pre> |
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* http://java.sun.com/index.html#chapter1 |
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* </pre></blockquote> |
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* <p> |
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* This fragment is not technically part of the URL. Rather, it |
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* indicates that after the specified resource is retrieved, the |
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* application is specifically interested in that part of the |
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* document that has the tag <code>chapter1</code> attached to it. The |
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* meaning of a tag is resource specific. |
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* <p> |
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* An application can also specify a "relative URL", |
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* which contains only enough information to reach the resource |
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* relative to another URL. Relative URLs are frequently used within |
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* HTML pages. For example, if the contents of the URL: |
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* <blockquote><pre> |
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* http://java.sun.com/index.html |
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* </pre></blockquote> |
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* contained within it the relative URL: |
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* <blockquote><pre> |
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* FAQ.html |
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* </pre></blockquote> |
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* it would be a shorthand for: |
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* <blockquote><pre> |
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* http://java.sun.com/FAQ.html |
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* </pre></blockquote> |
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* <p> |
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* The relative URL need not specify all the components of a URL. If |
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* the protocol, host name, or port number is missing, the value is |
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* inherited from the fully specified URL. The file component must be |
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* specified. The optional fragment is not inherited. |
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* <p> |
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* The URL class does not itself encode or decode any URL components |
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* according to the escaping mechanism defined in RFC2396. It is the |
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* responsibility of the caller to encode any fields, which need to be |
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* escaped prior to calling URL, and also to decode any escaped fields, |
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* that are returned from URL. Furthermore, because URL has no knowledge |
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* of URL escaping, it does not recognise equivalence between the encoded |
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* or decoded form of the same URL. For example, the two URLs:<br> |
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* <pre> http://foo.com/hello world/ and http://foo.com/hello%20world</pre> |
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* would be considered not equal to each other. |
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* <p> |
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* Note, the {@link java.net.URI} class does perform escaping of its |
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* component fields in certain circumstances. The recommended way |
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* to manage the encoding and decoding of URLs is to use {@link java.net.URI}, |
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* and to convert between these two classes using {@link #toURI()} and |
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* {@link URI#toURL()}. |
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* <p> |
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* The {@link URLEncoder} and {@link URLDecoder} classes can also be |
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* used, but only for HTML form encoding, which is not the same |
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* as the encoding scheme defined in RFC2396. |
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* |
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* @author James Gosling |
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* @since JDK1.0 |
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*/ |
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public final class URL implements java.io.Serializable { |
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static final long serialVersionUID = -7627629688361524110L; |
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/** |
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* The property which specifies the package prefix list to be scanned |
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* for protocol handlers. The value of this property (if any) should |
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* be a vertical bar delimited list of package names to search through |
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* for a protocol handler to load. The policy of this class is that |
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* all protocol handlers will be in a class called <protocolname>.Handler, |
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* and each package in the list is examined in turn for a matching |
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* handler. If none are found (or the property is not specified), the |
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* default package prefix, sun.net.www.protocol, is used. The search |
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* proceeds from the first package in the list to the last and stops |
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* when a match is found. |
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*/ |
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private static final String protocolPathProp = "java.protocol.handler.pkgs"; |
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/** |
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* The protocol to use (ftp, http, nntp, ... etc.) . |
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* @serial |
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*/ |
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private String protocol; |
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/** |
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* The host name to connect to. |
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* @serial |
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*/ |
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private String host; |
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/** |
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* The protocol port to connect to. |
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* @serial |
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*/ |
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private int port = -1; |
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/** |
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* The specified file name on that host. <code>file</code> is |
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* defined as <code>path[?query]</code> |
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* @serial |
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*/ |
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private String file; |
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/** |
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* The query part of this URL. |
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*/ |
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private transient String query; |
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/** |
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* The authority part of this URL. |
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* @serial |
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*/ |
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private String authority; |
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/** |
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* The path part of this URL. |
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*/ |
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private transient String path; |
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/** |
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* The userinfo part of this URL. |
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*/ |
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private transient String userInfo; |
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/** |
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* # reference. |
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* @serial |
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*/ |
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private String ref; |
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/** |
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* The host's IP address, used in equals and hashCode. |
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* Computed on demand. An uninitialized or unknown hostAddress is null. |
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*/ |
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transient InetAddress hostAddress; |
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/** |
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* The URLStreamHandler for this URL. |
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*/ |
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transient URLStreamHandler handler; |
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/* Our hash code. |
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* @serial |
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*/ |
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private int hashCode = -1; |
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/** |
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* Creates a <code>URL</code> object from the specified |
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* <code>protocol</code>, <code>host</code>, <code>port</code> |
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* number, and <code>file</code>.<p> |
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* |
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* <code>host</code> can be expressed as a host name or a literal |
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* IP address. If IPv6 literal address is used, it should be |
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* enclosed in square brackets (<tt>'['</tt> and <tt>']'</tt>), as |
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* specified by <a |
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* href="http://www.ietf.org/rfc/rfc2732.txt">RFC 2732</a>; |
|
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* However, the literal IPv6 address format defined in <a |
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* href="http://www.ietf.org/rfc/rfc2373.txt"><i>RFC 2373: IP |
|
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* Version 6 Addressing Architecture</i></a> is also accepted.<p> |
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* |
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* Specifying a <code>port</code> number of <code>-1</code> |
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* indicates that the URL should use the default port for the |
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* protocol.<p> |
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* |
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* If this is the first URL object being created with the specified |
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* protocol, a <i>stream protocol handler</i> object, an instance of |
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* class <code>URLStreamHandler</code>, is created for that protocol: |
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* <ol> |
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* <li>If the application has previously set up an instance of |
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* <code>URLStreamHandlerFactory</code> as the stream handler factory, |
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* then the <code>createURLStreamHandler</code> method of that instance |
|
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* is called with the protocol string as an argument to create the |
|
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* stream protocol handler. |
|
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* <li>If no <code>URLStreamHandlerFactory</code> has yet been set up, |
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* or if the factory's <code>createURLStreamHandler</code> method |
|
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* returns <code>null</code>, then the constructor finds the |
|
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* value of the system property: |
|
253 |
* <blockquote><pre> |
|
254 |
* java.protocol.handler.pkgs |
|
255 |
* </pre></blockquote> |
|
256 |
* If the value of that system property is not <code>null</code>, |
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* it is interpreted as a list of packages separated by a vertical |
|
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* slash character '<code>|</code>'. The constructor tries to load |
|
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* the class named: |
|
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* <blockquote><pre> |
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* <<i>package</i>>.<<i>protocol</i>>.Handler |
|
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* </pre></blockquote> |
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* where <<i>package</i>> is replaced by the name of the package |
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* and <<i>protocol</i>> is replaced by the name of the protocol. |
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* If this class does not exist, or if the class exists but it is not |
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* a subclass of <code>URLStreamHandler</code>, then the next package |
|
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* in the list is tried. |
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* <li>If the previous step fails to find a protocol handler, then the |
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* constructor tries to load from a system default package. |
|
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* <blockquote><pre> |
|
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* <<i>system default package</i>>.<<i>protocol</i>>.Handler |
|
272 |
* </pre></blockquote> |
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* If this class does not exist, or if the class exists but it is not a |
|
274 |
* subclass of <code>URLStreamHandler</code>, then a |
|
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* <code>MalformedURLException</code> is thrown. |
|
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* </ol> |
|
277 |
* |
|
278 |
* <p>Protocol handlers for the following protocols are guaranteed |
|
279 |
* to exist on the search path :- |
|
280 |
* <blockquote><pre> |
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* http, https, file, and jar |
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* </pre></blockquote> |
283 |
* Protocol handlers for additional protocols may also be |
|
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* available. |
|
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* |
|
286 |
* <p>No validation of the inputs is performed by this constructor. |
|
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* |
|
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* @param protocol the name of the protocol to use. |
|
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* @param host the name of the host. |
|
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* @param port the port number on the host. |
|
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* @param file the file on the host |
|
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* @exception MalformedURLException if an unknown protocol is specified. |
|
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* @see java.lang.System#getProperty(java.lang.String) |
|
294 |
* @see java.net.URL#setURLStreamHandlerFactory( |
|
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* java.net.URLStreamHandlerFactory) |
|
296 |
* @see java.net.URLStreamHandler |
|
297 |
* @see java.net.URLStreamHandlerFactory#createURLStreamHandler( |
|
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* java.lang.String) |
|
299 |
*/ |
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300 |
public URL(String protocol, String host, int port, String file) |
|
301 |
throws MalformedURLException |
|
302 |
{ |
|
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this(protocol, host, port, file, null); |
|
304 |
} |
|
305 |
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306 |
/** |
|
307 |
* Creates a URL from the specified <code>protocol</code> |
|
308 |
* name, <code>host</code> name, and <code>file</code> name. The |
|
309 |
* default port for the specified protocol is used. |
|
310 |
* <p> |
|
311 |
* This method is equivalent to calling the four-argument |
|
312 |
* constructor with the arguments being <code>protocol</code>, |
|
313 |
* <code>host</code>, <code>-1</code>, and <code>file</code>. |
|
314 |
* |
|
315 |
* No validation of the inputs is performed by this constructor. |
|
316 |
* |
|
317 |
* @param protocol the name of the protocol to use. |
|
318 |
* @param host the name of the host. |
|
319 |
* @param file the file on the host. |
|
320 |
* @exception MalformedURLException if an unknown protocol is specified. |
|
321 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, |
|
322 |
* int, java.lang.String) |
|
323 |
*/ |
|
324 |
public URL(String protocol, String host, String file) |
|
325 |
throws MalformedURLException { |
|
326 |
this(protocol, host, -1, file); |
|
327 |
} |
|
328 |
||
329 |
/** |
|
330 |
* Creates a <code>URL</code> object from the specified |
|
331 |
* <code>protocol</code>, <code>host</code>, <code>port</code> |
|
332 |
* number, <code>file</code>, and <code>handler</code>. Specifying |
|
333 |
* a <code>port</code> number of <code>-1</code> indicates that |
|
334 |
* the URL should use the default port for the protocol. Specifying |
|
335 |
* a <code>handler</code> of <code>null</code> indicates that the URL |
|
336 |
* should use a default stream handler for the protocol, as outlined |
|
337 |
* for: |
|
338 |
* java.net.URL#URL(java.lang.String, java.lang.String, int, |
|
339 |
* java.lang.String) |
|
340 |
* |
|
341 |
* <p>If the handler is not null and there is a security manager, |
|
342 |
* the security manager's <code>checkPermission</code> |
|
343 |
* method is called with a |
|
344 |
* <code>NetPermission("specifyStreamHandler")</code> permission. |
|
345 |
* This may result in a SecurityException. |
|
346 |
* |
|
347 |
* No validation of the inputs is performed by this constructor. |
|
348 |
* |
|
349 |
* @param protocol the name of the protocol to use. |
|
350 |
* @param host the name of the host. |
|
351 |
* @param port the port number on the host. |
|
352 |
* @param file the file on the host |
|
353 |
* @param handler the stream handler for the URL. |
|
354 |
* @exception MalformedURLException if an unknown protocol is specified. |
|
355 |
* @exception SecurityException |
|
356 |
* if a security manager exists and its |
|
357 |
* <code>checkPermission</code> method doesn't allow |
|
358 |
* specifying a stream handler explicitly. |
|
359 |
* @see java.lang.System#getProperty(java.lang.String) |
|
360 |
* @see java.net.URL#setURLStreamHandlerFactory( |
|
361 |
* java.net.URLStreamHandlerFactory) |
|
362 |
* @see java.net.URLStreamHandler |
|
363 |
* @see java.net.URLStreamHandlerFactory#createURLStreamHandler( |
|
364 |
* java.lang.String) |
|
365 |
* @see SecurityManager#checkPermission |
|
366 |
* @see java.net.NetPermission |
|
367 |
*/ |
|
368 |
public URL(String protocol, String host, int port, String file, |
|
369 |
URLStreamHandler handler) throws MalformedURLException { |
|
370 |
if (handler != null) { |
|
371 |
SecurityManager sm = System.getSecurityManager(); |
|
372 |
if (sm != null) { |
|
373 |
// check for permission to specify a handler |
|
374 |
checkSpecifyHandler(sm); |
|
375 |
} |
|
376 |
} |
|
377 |
||
378 |
protocol = protocol.toLowerCase(); |
|
379 |
this.protocol = protocol; |
|
380 |
if (host != null) { |
|
381 |
||
382 |
/** |
|
383 |
* if host is a literal IPv6 address, |
|
384 |
* we will make it conform to RFC 2732 |
|
385 |
*/ |
|
386 |
if (host.indexOf(':') >= 0 && !host.startsWith("[")) { |
|
387 |
host = "["+host+"]"; |
|
388 |
} |
|
389 |
this.host = host; |
|
390 |
||
391 |
if (port < -1) { |
|
392 |
throw new MalformedURLException("Invalid port number :" + |
|
393 |
port); |
|
394 |
} |
|
395 |
this.port = port; |
|
396 |
authority = (port == -1) ? host : host + ":" + port; |
|
397 |
} |
|
398 |
||
399 |
Parts parts = new Parts(file); |
|
400 |
path = parts.getPath(); |
|
401 |
query = parts.getQuery(); |
|
402 |
||
403 |
if (query != null) { |
|
404 |
this.file = path + "?" + query; |
|
405 |
} else { |
|
406 |
this.file = path; |
|
407 |
} |
|
408 |
ref = parts.getRef(); |
|
409 |
||
410 |
// Note: we don't do validation of the URL here. Too risky to change |
|
411 |
// right now, but worth considering for future reference. -br |
|
412 |
if (handler == null && |
|
413 |
(handler = getURLStreamHandler(protocol)) == null) { |
|
414 |
throw new MalformedURLException("unknown protocol: " + protocol); |
|
415 |
} |
|
416 |
this.handler = handler; |
|
417 |
} |
|
418 |
||
419 |
/** |
|
420 |
* Creates a <code>URL</code> object from the <code>String</code> |
|
421 |
* representation. |
|
422 |
* <p> |
|
423 |
* This constructor is equivalent to a call to the two-argument |
|
424 |
* constructor with a <code>null</code> first argument. |
|
425 |
* |
|
426 |
* @param spec the <code>String</code> to parse as a URL. |
|
427 |
* @exception MalformedURLException if no protocol is specified, or an |
|
428 |
* unknown protocol is found, or <tt>spec</tt> is <tt>null</tt>. |
|
429 |
* @see java.net.URL#URL(java.net.URL, java.lang.String) |
|
430 |
*/ |
|
431 |
public URL(String spec) throws MalformedURLException { |
|
432 |
this(null, spec); |
|
433 |
} |
|
434 |
||
435 |
/** |
|
436 |
* Creates a URL by parsing the given spec within a specified context. |
|
437 |
* |
|
438 |
* The new URL is created from the given context URL and the spec |
|
439 |
* argument as described in |
|
440 |
* RFC2396 "Uniform Resource Identifiers : Generic * Syntax" : |
|
441 |
* <blockquote><pre> |
|
442 |
* <scheme>://<authority><path>?<query>#<fragment> |
|
443 |
* </pre></blockquote> |
|
444 |
* The reference is parsed into the scheme, authority, path, query and |
|
445 |
* fragment parts. If the path component is empty and the scheme, |
|
446 |
* authority, and query components are undefined, then the new URL is a |
|
447 |
* reference to the current document. Otherwise, the fragment and query |
|
448 |
* parts present in the spec are used in the new URL. |
|
449 |
* <p> |
|
450 |
* If the scheme component is defined in the given spec and does not match |
|
451 |
* the scheme of the context, then the new URL is created as an absolute |
|
452 |
* URL based on the spec alone. Otherwise the scheme component is inherited |
|
453 |
* from the context URL. |
|
454 |
* <p> |
|
455 |
* If the authority component is present in the spec then the spec is |
|
456 |
* treated as absolute and the spec authority and path will replace the |
|
457 |
* context authority and path. If the authority component is absent in the |
|
458 |
* spec then the authority of the new URL will be inherited from the |
|
459 |
* context. |
|
460 |
* <p> |
|
461 |
* If the spec's path component begins with a slash character |
|
462 |
* "/" then the |
|
463 |
* path is treated as absolute and the spec path replaces the context path. |
|
464 |
* <p> |
|
465 |
* Otherwise, the path is treated as a relative path and is appended to the |
|
466 |
* context path, as described in RFC2396. Also, in this case, |
|
467 |
* the path is canonicalized through the removal of directory |
|
468 |
* changes made by occurences of ".." and ".". |
|
469 |
* <p> |
|
470 |
* For a more detailed description of URL parsing, refer to RFC2396. |
|
471 |
* |
|
472 |
* @param context the context in which to parse the specification. |
|
473 |
* @param spec the <code>String</code> to parse as a URL. |
|
474 |
* @exception MalformedURLException if no protocol is specified, or an |
|
475 |
* unknown protocol is found, or <tt>spec</tt> is <tt>null</tt>. |
|
476 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, |
|
477 |
* int, java.lang.String) |
|
478 |
* @see java.net.URLStreamHandler |
|
479 |
* @see java.net.URLStreamHandler#parseURL(java.net.URL, |
|
480 |
* java.lang.String, int, int) |
|
481 |
*/ |
|
482 |
public URL(URL context, String spec) throws MalformedURLException { |
|
483 |
this(context, spec, null); |
|
484 |
} |
|
485 |
||
486 |
/** |
|
487 |
* Creates a URL by parsing the given spec with the specified handler |
|
488 |
* within a specified context. If the handler is null, the parsing |
|
489 |
* occurs as with the two argument constructor. |
|
490 |
* |
|
491 |
* @param context the context in which to parse the specification. |
|
492 |
* @param spec the <code>String</code> to parse as a URL. |
|
493 |
* @param handler the stream handler for the URL. |
|
494 |
* @exception MalformedURLException if no protocol is specified, or an |
|
495 |
* unknown protocol is found, or <tt>spec</tt> is <tt>null</tt>. |
|
496 |
* @exception SecurityException |
|
497 |
* if a security manager exists and its |
|
498 |
* <code>checkPermission</code> method doesn't allow |
|
499 |
* specifying a stream handler. |
|
500 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, |
|
501 |
* int, java.lang.String) |
|
502 |
* @see java.net.URLStreamHandler |
|
503 |
* @see java.net.URLStreamHandler#parseURL(java.net.URL, |
|
504 |
* java.lang.String, int, int) |
|
505 |
*/ |
|
506 |
public URL(URL context, String spec, URLStreamHandler handler) |
|
507 |
throws MalformedURLException |
|
508 |
{ |
|
509 |
String original = spec; |
|
510 |
int i, limit, c; |
|
511 |
int start = 0; |
|
512 |
String newProtocol = null; |
|
513 |
boolean aRef=false; |
|
514 |
boolean isRelative = false; |
|
515 |
||
516 |
// Check for permission to specify a handler |
|
517 |
if (handler != null) { |
|
518 |
SecurityManager sm = System.getSecurityManager(); |
|
519 |
if (sm != null) { |
|
520 |
checkSpecifyHandler(sm); |
|
521 |
} |
|
522 |
} |
|
523 |
||
524 |
try { |
|
525 |
limit = spec.length(); |
|
526 |
while ((limit > 0) && (spec.charAt(limit - 1) <= ' ')) { |
|
527 |
limit--; //eliminate trailing whitespace |
|
528 |
} |
|
529 |
while ((start < limit) && (spec.charAt(start) <= ' ')) { |
|
530 |
start++; // eliminate leading whitespace |
|
531 |
} |
|
532 |
||
533 |
if (spec.regionMatches(true, start, "url:", 0, 4)) { |
|
534 |
start += 4; |
|
535 |
} |
|
536 |
if (start < spec.length() && spec.charAt(start) == '#') { |
|
537 |
/* we're assuming this is a ref relative to the context URL. |
|
538 |
* This means protocols cannot start w/ '#', but we must parse |
|
539 |
* ref URL's like: "hello:there" w/ a ':' in them. |
|
540 |
*/ |
|
541 |
aRef=true; |
|
542 |
} |
|
543 |
for (i = start ; !aRef && (i < limit) && |
|
544 |
((c = spec.charAt(i)) != '/') ; i++) { |
|
545 |
if (c == ':') { |
|
546 |
||
547 |
String s = spec.substring(start, i).toLowerCase(); |
|
548 |
if (isValidProtocol(s)) { |
|
549 |
newProtocol = s; |
|
550 |
start = i + 1; |
|
551 |
} |
|
552 |
break; |
|
553 |
} |
|
554 |
} |
|
555 |
||
556 |
// Only use our context if the protocols match. |
|
557 |
protocol = newProtocol; |
|
558 |
if ((context != null) && ((newProtocol == null) || |
|
559 |
newProtocol.equalsIgnoreCase(context.protocol))) { |
|
560 |
// inherit the protocol handler from the context |
|
561 |
// if not specified to the constructor |
|
562 |
if (handler == null) { |
|
563 |
handler = context.handler; |
|
564 |
} |
|
565 |
||
566 |
// If the context is a hierarchical URL scheme and the spec |
|
567 |
// contains a matching scheme then maintain backwards |
|
568 |
// compatibility and treat it as if the spec didn't contain |
|
569 |
// the scheme; see 5.2.3 of RFC2396 |
|
570 |
if (context.path != null && context.path.startsWith("/")) |
|
571 |
newProtocol = null; |
|
572 |
||
573 |
if (newProtocol == null) { |
|
574 |
protocol = context.protocol; |
|
575 |
authority = context.authority; |
|
576 |
userInfo = context.userInfo; |
|
577 |
host = context.host; |
|
578 |
port = context.port; |
|
579 |
file = context.file; |
|
580 |
path = context.path; |
|
581 |
isRelative = true; |
|
582 |
} |
|
583 |
} |
|
584 |
||
585 |
if (protocol == null) { |
|
586 |
throw new MalformedURLException("no protocol: "+original); |
|
587 |
} |
|
588 |
||
589 |
// Get the protocol handler if not specified or the protocol |
|
590 |
// of the context could not be used |
|
591 |
if (handler == null && |
|
592 |
(handler = getURLStreamHandler(protocol)) == null) { |
|
593 |
throw new MalformedURLException("unknown protocol: "+protocol); |
|
594 |
} |
|
595 |
||
596 |
this.handler = handler; |
|
597 |
||
598 |
i = spec.indexOf('#', start); |
|
599 |
if (i >= 0) { |
|
600 |
ref = spec.substring(i + 1, limit); |
|
601 |
limit = i; |
|
602 |
} |
|
603 |
||
604 |
/* |
|
605 |
* Handle special case inheritance of query and fragment |
|
606 |
* implied by RFC2396 section 5.2.2. |
|
607 |
*/ |
|
608 |
if (isRelative && start == limit) { |
|
609 |
query = context.query; |
|
610 |
if (ref == null) { |
|
611 |
ref = context.ref; |
|
612 |
} |
|
613 |
} |
|
614 |
||
615 |
handler.parseURL(this, spec, start, limit); |
|
616 |
||
617 |
} catch(MalformedURLException e) { |
|
618 |
throw e; |
|
619 |
} catch(Exception e) { |
|
620 |
MalformedURLException exception = new MalformedURLException(e.getMessage()); |
|
621 |
exception.initCause(e); |
|
622 |
throw exception; |
|
623 |
} |
|
624 |
} |
|
625 |
||
626 |
/* |
|
627 |
* Returns true if specified string is a valid protocol name. |
|
628 |
*/ |
|
629 |
private boolean isValidProtocol(String protocol) { |
|
630 |
int len = protocol.length(); |
|
631 |
if (len < 1) |
|
632 |
return false; |
|
633 |
char c = protocol.charAt(0); |
|
634 |
if (!Character.isLetter(c)) |
|
635 |
return false; |
|
636 |
for (int i = 1; i < len; i++) { |
|
637 |
c = protocol.charAt(i); |
|
638 |
if (!Character.isLetterOrDigit(c) && c != '.' && c != '+' && |
|
639 |
c != '-') { |
|
640 |
return false; |
|
641 |
} |
|
642 |
} |
|
643 |
return true; |
|
644 |
} |
|
645 |
||
646 |
/* |
|
647 |
* Checks for permission to specify a stream handler. |
|
648 |
*/ |
|
649 |
private void checkSpecifyHandler(SecurityManager sm) { |
|
650 |
sm.checkPermission(SecurityConstants.SPECIFY_HANDLER_PERMISSION); |
|
651 |
} |
|
652 |
||
653 |
/** |
|
654 |
* Sets the fields of the URL. This is not a public method so that |
|
655 |
* only URLStreamHandlers can modify URL fields. URLs are |
|
656 |
* otherwise constant. |
|
657 |
* |
|
658 |
* @param protocol the name of the protocol to use |
|
659 |
* @param host the name of the host |
|
660 |
@param port the port number on the host |
|
661 |
* @param file the file on the host |
|
662 |
* @param ref the internal reference in the URL |
|
663 |
*/ |
|
664 |
protected void set(String protocol, String host, |
|
665 |
int port, String file, String ref) { |
|
666 |
synchronized (this) { |
|
667 |
this.protocol = protocol; |
|
668 |
this.host = host; |
|
669 |
authority = port == -1 ? host : host + ":" + port; |
|
670 |
this.port = port; |
|
671 |
this.file = file; |
|
672 |
this.ref = ref; |
|
673 |
/* This is very important. We must recompute this after the |
|
674 |
* URL has been changed. */ |
|
675 |
hashCode = -1; |
|
676 |
hostAddress = null; |
|
677 |
int q = file.lastIndexOf('?'); |
|
678 |
if (q != -1) { |
|
679 |
query = file.substring(q+1); |
|
680 |
path = file.substring(0, q); |
|
681 |
} else |
|
682 |
path = file; |
|
683 |
} |
|
684 |
} |
|
685 |
||
686 |
/** |
|
687 |
* Sets the specified 8 fields of the URL. This is not a public method so |
|
688 |
* that only URLStreamHandlers can modify URL fields. URLs are otherwise |
|
689 |
* constant. |
|
690 |
* |
|
691 |
* @param protocol the name of the protocol to use |
|
692 |
* @param host the name of the host |
|
693 |
* @param port the port number on the host |
|
694 |
* @param authority the authority part for the url |
|
695 |
* @param userInfo the username and password |
|
696 |
* @param path the file on the host |
|
697 |
* @param ref the internal reference in the URL |
|
698 |
* @param query the query part of this URL |
|
699 |
* @since 1.3 |
|
700 |
*/ |
|
701 |
protected void set(String protocol, String host, int port, |
|
702 |
String authority, String userInfo, String path, |
|
703 |
String query, String ref) { |
|
704 |
synchronized (this) { |
|
705 |
this.protocol = protocol; |
|
706 |
this.host = host; |
|
707 |
this.port = port; |
|
708 |
this.file = query == null ? path : path + "?" + query; |
|
709 |
this.userInfo = userInfo; |
|
710 |
this.path = path; |
|
711 |
this.ref = ref; |
|
712 |
/* This is very important. We must recompute this after the |
|
713 |
* URL has been changed. */ |
|
714 |
hashCode = -1; |
|
715 |
hostAddress = null; |
|
716 |
this.query = query; |
|
717 |
this.authority = authority; |
|
718 |
} |
|
719 |
} |
|
720 |
||
721 |
/** |
|
722 |
* Gets the query part of this <code>URL</code>. |
|
723 |
* |
|
724 |
* @return the query part of this <code>URL</code>, |
|
725 |
* or <CODE>null</CODE> if one does not exist |
|
726 |
* @since 1.3 |
|
727 |
*/ |
|
728 |
public String getQuery() { |
|
729 |
return query; |
|
730 |
} |
|
731 |
||
732 |
/** |
|
733 |
* Gets the path part of this <code>URL</code>. |
|
734 |
* |
|
735 |
* @return the path part of this <code>URL</code>, or an |
|
736 |
* empty string if one does not exist |
|
737 |
* @since 1.3 |
|
738 |
*/ |
|
739 |
public String getPath() { |
|
740 |
return path; |
|
741 |
} |
|
742 |
||
743 |
/** |
|
744 |
* Gets the userInfo part of this <code>URL</code>. |
|
745 |
* |
|
746 |
* @return the userInfo part of this <code>URL</code>, or |
|
747 |
* <CODE>null</CODE> if one does not exist |
|
748 |
* @since 1.3 |
|
749 |
*/ |
|
750 |
public String getUserInfo() { |
|
751 |
return userInfo; |
|
752 |
} |
|
753 |
||
754 |
/** |
|
755 |
* Gets the authority part of this <code>URL</code>. |
|
756 |
* |
|
757 |
* @return the authority part of this <code>URL</code> |
|
758 |
* @since 1.3 |
|
759 |
*/ |
|
760 |
public String getAuthority() { |
|
761 |
return authority; |
|
762 |
} |
|
763 |
||
764 |
/** |
|
765 |
* Gets the port number of this <code>URL</code>. |
|
766 |
* |
|
767 |
* @return the port number, or -1 if the port is not set |
|
768 |
*/ |
|
769 |
public int getPort() { |
|
770 |
return port; |
|
771 |
} |
|
772 |
||
773 |
/** |
|
774 |
* Gets the default port number of the protocol associated |
|
775 |
* with this <code>URL</code>. If the URL scheme or the URLStreamHandler |
|
776 |
* for the URL do not define a default port number, |
|
777 |
* then -1 is returned. |
|
778 |
* |
|
779 |
* @return the port number |
|
780 |
* @since 1.4 |
|
781 |
*/ |
|
782 |
public int getDefaultPort() { |
|
783 |
return handler.getDefaultPort(); |
|
784 |
} |
|
785 |
||
786 |
/** |
|
787 |
* Gets the protocol name of this <code>URL</code>. |
|
788 |
* |
|
789 |
* @return the protocol of this <code>URL</code>. |
|
790 |
*/ |
|
791 |
public String getProtocol() { |
|
792 |
return protocol; |
|
793 |
} |
|
794 |
||
795 |
/** |
|
796 |
* Gets the host name of this <code>URL</code>, if applicable. |
|
797 |
* The format of the host conforms to RFC 2732, i.e. for a |
|
798 |
* literal IPv6 address, this method will return the IPv6 address |
|
799 |
* enclosed in square brackets (<tt>'['</tt> and <tt>']'</tt>). |
|
800 |
* |
|
801 |
* @return the host name of this <code>URL</code>. |
|
802 |
*/ |
|
803 |
public String getHost() { |
|
804 |
return host; |
|
805 |
} |
|
806 |
||
807 |
/** |
|
808 |
* Gets the file name of this <code>URL</code>. |
|
809 |
* The returned file portion will be |
|
810 |
* the same as <CODE>getPath()</CODE>, plus the concatenation of |
|
811 |
* the value of <CODE>getQuery()</CODE>, if any. If there is |
|
812 |
* no query portion, this method and <CODE>getPath()</CODE> will |
|
813 |
* return identical results. |
|
814 |
* |
|
815 |
* @return the file name of this <code>URL</code>, |
|
816 |
* or an empty string if one does not exist |
|
817 |
*/ |
|
818 |
public String getFile() { |
|
819 |
return file; |
|
820 |
} |
|
821 |
||
822 |
/** |
|
823 |
* Gets the anchor (also known as the "reference") of this |
|
824 |
* <code>URL</code>. |
|
825 |
* |
|
826 |
* @return the anchor (also known as the "reference") of this |
|
827 |
* <code>URL</code>, or <CODE>null</CODE> if one does not exist |
|
828 |
*/ |
|
829 |
public String getRef() { |
|
830 |
return ref; |
|
831 |
} |
|
832 |
||
833 |
/** |
|
834 |
* Compares this URL for equality with another object.<p> |
|
835 |
* |
|
836 |
* If the given object is not a URL then this method immediately returns |
|
837 |
* <code>false</code>.<p> |
|
838 |
* |
|
839 |
* Two URL objects are equal if they have the same protocol, reference |
|
840 |
* equivalent hosts, have the same port number on the host, and the same |
|
841 |
* file and fragment of the file.<p> |
|
842 |
* |
|
843 |
* Two hosts are considered equivalent if both host names can be resolved |
|
844 |
* into the same IP addresses; else if either host name can't be |
|
845 |
* resolved, the host names must be equal without regard to case; or both |
|
846 |
* host names equal to null.<p> |
|
847 |
* |
|
848 |
* Since hosts comparison requires name resolution, this operation is a |
|
849 |
* blocking operation. <p> |
|
850 |
* |
|
851 |
* Note: The defined behavior for <code>equals</code> is known to |
|
852 |
* be inconsistent with virtual hosting in HTTP. |
|
853 |
* |
|
854 |
* @param obj the URL to compare against. |
|
855 |
* @return <code>true</code> if the objects are the same; |
|
856 |
* <code>false</code> otherwise. |
|
857 |
*/ |
|
858 |
public boolean equals(Object obj) { |
|
859 |
if (!(obj instanceof URL)) |
|
860 |
return false; |
|
861 |
URL u2 = (URL)obj; |
|
862 |
||
863 |
return handler.equals(this, u2); |
|
864 |
} |
|
865 |
||
866 |
/** |
|
867 |
* Creates an integer suitable for hash table indexing.<p> |
|
868 |
* |
|
869 |
* The hash code is based upon all the URL components relevant for URL |
|
870 |
* comparison. As such, this operation is a blocking operation.<p> |
|
871 |
* |
|
872 |
* @return a hash code for this <code>URL</code>. |
|
873 |
*/ |
|
874 |
public synchronized int hashCode() { |
|
875 |
if (hashCode != -1) |
|
876 |
return hashCode; |
|
877 |
||
878 |
hashCode = handler.hashCode(this); |
|
879 |
return hashCode; |
|
880 |
} |
|
881 |
||
882 |
/** |
|
883 |
* Compares two URLs, excluding the fragment component.<p> |
|
884 |
* |
|
885 |
* Returns <code>true</code> if this <code>URL</code> and the |
|
886 |
* <code>other</code> argument are equal without taking the |
|
887 |
* fragment component into consideration. |
|
888 |
* |
|
889 |
* @param other the <code>URL</code> to compare against. |
|
890 |
* @return <code>true</code> if they reference the same remote object; |
|
891 |
* <code>false</code> otherwise. |
|
892 |
*/ |
|
893 |
public boolean sameFile(URL other) { |
|
894 |
return handler.sameFile(this, other); |
|
895 |
} |
|
896 |
||
897 |
/** |
|
898 |
* Constructs a string representation of this <code>URL</code>. The |
|
899 |
* string is created by calling the <code>toExternalForm</code> |
|
900 |
* method of the stream protocol handler for this object. |
|
901 |
* |
|
902 |
* @return a string representation of this object. |
|
903 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, int, |
|
904 |
* java.lang.String) |
|
905 |
* @see java.net.URLStreamHandler#toExternalForm(java.net.URL) |
|
906 |
*/ |
|
907 |
public String toString() { |
|
908 |
return toExternalForm(); |
|
909 |
} |
|
910 |
||
911 |
/** |
|
912 |
* Constructs a string representation of this <code>URL</code>. The |
|
913 |
* string is created by calling the <code>toExternalForm</code> |
|
914 |
* method of the stream protocol handler for this object. |
|
915 |
* |
|
916 |
* @return a string representation of this object. |
|
917 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, |
|
918 |
* int, java.lang.String) |
|
919 |
* @see java.net.URLStreamHandler#toExternalForm(java.net.URL) |
|
920 |
*/ |
|
921 |
public String toExternalForm() { |
|
922 |
return handler.toExternalForm(this); |
|
923 |
} |
|
924 |
||
925 |
/** |
|
926 |
* Returns a {@link java.net.URI} equivalent to this URL. |
|
927 |
* This method functions in the same way as <code>new URI (this.toString())</code>. |
|
928 |
* <p>Note, any URL instance that complies with RFC 2396 can be converted |
|
929 |
* to a URI. However, some URLs that are not strictly in compliance |
|
930 |
* can not be converted to a URI. |
|
931 |
* |
|
932 |
* @exception URISyntaxException if this URL is not formatted strictly according to |
|
933 |
* to RFC2396 and cannot be converted to a URI. |
|
934 |
* |
|
935 |
* @return a URI instance equivalent to this URL. |
|
936 |
* @since 1.5 |
|
937 |
*/ |
|
938 |
public URI toURI() throws URISyntaxException { |
|
939 |
return new URI (toString()); |
|
940 |
} |
|
941 |
||
942 |
/** |
|
943 |
* Returns a {@link java.net.URLConnection URLConnection} instance that |
|
944 |
* represents a connection to the remote object referred to by the |
|
945 |
* {@code URL}. |
|
946 |
* |
|
947 |
* <P>A new instance of {@linkplain java.net.URLConnection URLConnection} is |
|
948 |
* created every time when invoking the |
|
949 |
* {@linkplain java.net.URLStreamHandler#openConnection(URL) |
|
950 |
* URLStreamHandler.openConnection(URL)} method of the protocol handler for |
|
951 |
* this URL.</P> |
|
952 |
* |
|
953 |
* <P>It should be noted that a URLConnection instance does not establish |
|
954 |
* the actual network connection on creation. This will happen only when |
|
955 |
* calling {@linkplain java.net.URLConnection#connect() URLConnection.connect()}.</P> |
|
956 |
* |
|
957 |
* <P>If for the URL's protocol (such as HTTP or JAR), there |
|
958 |
* exists a public, specialized URLConnection subclass belonging |
|
959 |
* to one of the following packages or one of their subpackages: |
|
960 |
* java.lang, java.io, java.util, java.net, the connection |
|
961 |
* returned will be of that subclass. For example, for HTTP an |
|
962 |
* HttpURLConnection will be returned, and for JAR a |
|
963 |
* JarURLConnection will be returned.</P> |
|
964 |
* |
|
965 |
* @return a {@link java.net.URLConnection URLConnection} linking |
|
966 |
* to the URL. |
|
967 |
* @exception IOException if an I/O exception occurs. |
|
968 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, |
|
969 |
* int, java.lang.String) |
|
970 |
*/ |
|
971 |
public URLConnection openConnection() throws java.io.IOException { |
|
972 |
return handler.openConnection(this); |
|
973 |
} |
|
974 |
||
975 |
/** |
|
976 |
* Same as {@link #openConnection()}, except that the connection will be |
|
977 |
* made through the specified proxy; Protocol handlers that do not |
|
978 |
* support proxing will ignore the proxy parameter and make a |
|
979 |
* normal connection. |
|
980 |
* |
|
981 |
* Invoking this method preempts the system's default ProxySelector |
|
982 |
* settings. |
|
983 |
* |
|
984 |
* @param proxy the Proxy through which this connection |
|
985 |
* will be made. If direct connection is desired, |
|
986 |
* Proxy.NO_PROXY should be specified. |
|
987 |
* @return a <code>URLConnection</code> to the URL. |
|
988 |
* @exception IOException if an I/O exception occurs. |
|
989 |
* @exception SecurityException if a security manager is present |
|
990 |
* and the caller doesn't have permission to connect |
|
991 |
* to the proxy. |
|
992 |
* @exception IllegalArgumentException will be thrown if proxy is null, |
|
993 |
* or proxy has the wrong type |
|
994 |
* @exception UnsupportedOperationException if the subclass that |
|
995 |
* implements the protocol handler doesn't support |
|
996 |
* this method. |
|
997 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, |
|
998 |
* int, java.lang.String) |
|
999 |
* @see java.net.URLConnection |
|
1000 |
* @see java.net.URLStreamHandler#openConnection(java.net.URL, |
|
1001 |
* java.net.Proxy) |
|
1002 |
* @since 1.5 |
|
1003 |
*/ |
|
1004 |
public URLConnection openConnection(Proxy proxy) |
|
1005 |
throws java.io.IOException { |
|
1006 |
if (proxy == null) { |
|
1007 |
throw new IllegalArgumentException("proxy can not be null"); |
|
1008 |
} |
|
1009 |
||
3442
02df74328591
6801497: Proxy is assumed to be immutable but is non-final
jccollet
parents:
715
diff
changeset
|
1010 |
// Create a copy of Proxy as a security measure |
3450
2f08a8bb9b83
6801071: Remote sites can compromise user privacy and possibly hijack web sessions
chegar
parents:
3442
diff
changeset
|
1011 |
Proxy p = proxy == Proxy.NO_PROXY ? Proxy.NO_PROXY : sun.net.ApplicationProxy.create(proxy); |
2 | 1012 |
SecurityManager sm = System.getSecurityManager(); |
3442
02df74328591
6801497: Proxy is assumed to be immutable but is non-final
jccollet
parents:
715
diff
changeset
|
1013 |
if (p.type() != Proxy.Type.DIRECT && sm != null) { |
02df74328591
6801497: Proxy is assumed to be immutable but is non-final
jccollet
parents:
715
diff
changeset
|
1014 |
InetSocketAddress epoint = (InetSocketAddress) p.address(); |
2 | 1015 |
if (epoint.isUnresolved()) |
1016 |
sm.checkConnect(epoint.getHostName(), epoint.getPort()); |
|
1017 |
else |
|
1018 |
sm.checkConnect(epoint.getAddress().getHostAddress(), |
|
1019 |
epoint.getPort()); |
|
1020 |
} |
|
3442
02df74328591
6801497: Proxy is assumed to be immutable but is non-final
jccollet
parents:
715
diff
changeset
|
1021 |
return handler.openConnection(this, p); |
2 | 1022 |
} |
1023 |
||
1024 |
/** |
|
1025 |
* Opens a connection to this <code>URL</code> and returns an |
|
1026 |
* <code>InputStream</code> for reading from that connection. This |
|
1027 |
* method is a shorthand for: |
|
1028 |
* <blockquote><pre> |
|
1029 |
* openConnection().getInputStream() |
|
1030 |
* </pre></blockquote> |
|
1031 |
* |
|
1032 |
* @return an input stream for reading from the URL connection. |
|
1033 |
* @exception IOException if an I/O exception occurs. |
|
1034 |
* @see java.net.URL#openConnection() |
|
1035 |
* @see java.net.URLConnection#getInputStream() |
|
1036 |
*/ |
|
1037 |
public final InputStream openStream() throws java.io.IOException { |
|
1038 |
return openConnection().getInputStream(); |
|
1039 |
} |
|
1040 |
||
1041 |
/** |
|
1042 |
* Gets the contents of this URL. This method is a shorthand for: |
|
1043 |
* <blockquote><pre> |
|
1044 |
* openConnection().getContent() |
|
1045 |
* </pre></blockquote> |
|
1046 |
* |
|
1047 |
* @return the contents of this URL. |
|
1048 |
* @exception IOException if an I/O exception occurs. |
|
1049 |
* @see java.net.URLConnection#getContent() |
|
1050 |
*/ |
|
1051 |
public final Object getContent() throws java.io.IOException { |
|
1052 |
return openConnection().getContent(); |
|
1053 |
} |
|
1054 |
||
1055 |
/** |
|
1056 |
* Gets the contents of this URL. This method is a shorthand for: |
|
1057 |
* <blockquote><pre> |
|
1058 |
* openConnection().getContent(Class[]) |
|
1059 |
* </pre></blockquote> |
|
1060 |
* |
|
1061 |
* @param classes an array of Java types |
|
1062 |
* @return the content object of this URL that is the first match of |
|
1063 |
* the types specified in the classes array. |
|
1064 |
* null if none of the requested types are supported. |
|
1065 |
* @exception IOException if an I/O exception occurs. |
|
1066 |
* @see java.net.URLConnection#getContent(Class[]) |
|
1067 |
* @since 1.3 |
|
1068 |
*/ |
|
1069 |
public final Object getContent(Class[] classes) |
|
1070 |
throws java.io.IOException { |
|
1071 |
return openConnection().getContent(classes); |
|
1072 |
} |
|
1073 |
||
1074 |
/** |
|
1075 |
* The URLStreamHandler factory. |
|
1076 |
*/ |
|
1077 |
static URLStreamHandlerFactory factory; |
|
1078 |
||
1079 |
/** |
|
1080 |
* Sets an application's <code>URLStreamHandlerFactory</code>. |
|
1081 |
* This method can be called at most once in a given Java Virtual |
|
1082 |
* Machine. |
|
1083 |
* |
|
1084 |
*<p> The <code>URLStreamHandlerFactory</code> instance is used to |
|
1085 |
*construct a stream protocol handler from a protocol name. |
|
1086 |
* |
|
1087 |
* <p> If there is a security manager, this method first calls |
|
1088 |
* the security manager's <code>checkSetFactory</code> method |
|
1089 |
* to ensure the operation is allowed. |
|
1090 |
* This could result in a SecurityException. |
|
1091 |
* |
|
1092 |
* @param fac the desired factory. |
|
1093 |
* @exception Error if the application has already set a factory. |
|
1094 |
* @exception SecurityException if a security manager exists and its |
|
1095 |
* <code>checkSetFactory</code> method doesn't allow |
|
1096 |
* the operation. |
|
1097 |
* @see java.net.URL#URL(java.lang.String, java.lang.String, |
|
1098 |
* int, java.lang.String) |
|
1099 |
* @see java.net.URLStreamHandlerFactory |
|
1100 |
* @see SecurityManager#checkSetFactory |
|
1101 |
*/ |
|
1102 |
public static void setURLStreamHandlerFactory(URLStreamHandlerFactory fac) { |
|
1103 |
synchronized (streamHandlerLock) { |
|
1104 |
if (factory != null) { |
|
1105 |
throw new Error("factory already defined"); |
|
1106 |
} |
|
1107 |
SecurityManager security = System.getSecurityManager(); |
|
1108 |
if (security != null) { |
|
1109 |
security.checkSetFactory(); |
|
1110 |
} |
|
1111 |
handlers.clear(); |
|
1112 |
factory = fac; |
|
1113 |
} |
|
1114 |
} |
|
1115 |
||
1116 |
/** |
|
1117 |
* A table of protocol handlers. |
|
1118 |
*/ |
|
10596
39b3a979e600
7090158: Networking Libraries don't build with javac -Werror
chegar
parents:
5506
diff
changeset
|
1119 |
static Hashtable<String,URLStreamHandler> handlers = new Hashtable<>(); |
2 | 1120 |
private static Object streamHandlerLock = new Object(); |
1121 |
||
1122 |
/** |
|
1123 |
* Returns the Stream Handler. |
|
1124 |
* @param protocol the protocol to use |
|
1125 |
*/ |
|
1126 |
static URLStreamHandler getURLStreamHandler(String protocol) { |
|
1127 |
||
10596
39b3a979e600
7090158: Networking Libraries don't build with javac -Werror
chegar
parents:
5506
diff
changeset
|
1128 |
URLStreamHandler handler = handlers.get(protocol); |
2 | 1129 |
if (handler == null) { |
1130 |
||
1131 |
boolean checkedWithFactory = false; |
|
1132 |
||
1133 |
// Use the factory (if any) |
|
1134 |
if (factory != null) { |
|
1135 |
handler = factory.createURLStreamHandler(protocol); |
|
1136 |
checkedWithFactory = true; |
|
1137 |
} |
|
1138 |
||
1139 |
// Try java protocol handler |
|
1140 |
if (handler == null) { |
|
1141 |
String packagePrefixList = null; |
|
1142 |
||
1143 |
packagePrefixList |
|
1144 |
= java.security.AccessController.doPrivileged( |
|
1145 |
new sun.security.action.GetPropertyAction( |
|
1146 |
protocolPathProp,"")); |
|
1147 |
if (packagePrefixList != "") { |
|
1148 |
packagePrefixList += "|"; |
|
1149 |
} |
|
1150 |
||
1151 |
// REMIND: decide whether to allow the "null" class prefix |
|
1152 |
// or not. |
|
1153 |
packagePrefixList += "sun.net.www.protocol"; |
|
1154 |
||
1155 |
StringTokenizer packagePrefixIter = |
|
1156 |
new StringTokenizer(packagePrefixList, "|"); |
|
1157 |
||
1158 |
while (handler == null && |
|
1159 |
packagePrefixIter.hasMoreTokens()) { |
|
1160 |
||
1161 |
String packagePrefix = |
|
1162 |
packagePrefixIter.nextToken().trim(); |
|
1163 |
try { |
|
1164 |
String clsName = packagePrefix + "." + protocol + |
|
1165 |
".Handler"; |
|
10596
39b3a979e600
7090158: Networking Libraries don't build with javac -Werror
chegar
parents:
5506
diff
changeset
|
1166 |
Class<?> cls = null; |
2 | 1167 |
try { |
1168 |
cls = Class.forName(clsName); |
|
1169 |
} catch (ClassNotFoundException e) { |
|
1170 |
ClassLoader cl = ClassLoader.getSystemClassLoader(); |
|
1171 |
if (cl != null) { |
|
1172 |
cls = cl.loadClass(clsName); |
|
1173 |
} |
|
1174 |
} |
|
1175 |
if (cls != null) { |
|
1176 |
handler = |
|
1177 |
(URLStreamHandler)cls.newInstance(); |
|
1178 |
} |
|
1179 |
} catch (Exception e) { |
|
1180 |
// any number of exceptions can get thrown here |
|
1181 |
} |
|
1182 |
} |
|
1183 |
} |
|
1184 |
||
1185 |
synchronized (streamHandlerLock) { |
|
1186 |
||
1187 |
URLStreamHandler handler2 = null; |
|
1188 |
||
1189 |
// Check again with hashtable just in case another |
|
1190 |
// thread created a handler since we last checked |
|
10596
39b3a979e600
7090158: Networking Libraries don't build with javac -Werror
chegar
parents:
5506
diff
changeset
|
1191 |
handler2 = handlers.get(protocol); |
2 | 1192 |
|
1193 |
if (handler2 != null) { |
|
1194 |
return handler2; |
|
1195 |
} |
|
1196 |
||
1197 |
// Check with factory if another thread set a |
|
1198 |
// factory since our last check |
|
1199 |
if (!checkedWithFactory && factory != null) { |
|
1200 |
handler2 = factory.createURLStreamHandler(protocol); |
|
1201 |
} |
|
1202 |
||
1203 |
if (handler2 != null) { |
|
1204 |
// The handler from the factory must be given more |
|
1205 |
// importance. Discard the default handler that |
|
1206 |
// this thread created. |
|
1207 |
handler = handler2; |
|
1208 |
} |
|
1209 |
||
1210 |
// Insert this handler into the hashtable |
|
1211 |
if (handler != null) { |
|
1212 |
handlers.put(protocol, handler); |
|
1213 |
} |
|
1214 |
||
1215 |
} |
|
1216 |
} |
|
1217 |
||
1218 |
return handler; |
|
1219 |
||
1220 |
} |
|
1221 |
||
1222 |
/** |
|
1223 |
* WriteObject is called to save the state of the URL to an |
|
1224 |
* ObjectOutputStream. The handler is not saved since it is |
|
1225 |
* specific to this system. |
|
1226 |
* |
|
1227 |
* @serialData the default write object value. When read back in, |
|
1228 |
* the reader must ensure that calling getURLStreamHandler with |
|
1229 |
* the protocol variable returns a valid URLStreamHandler and |
|
1230 |
* throw an IOException if it does not. |
|
1231 |
*/ |
|
1232 |
private synchronized void writeObject(java.io.ObjectOutputStream s) |
|
1233 |
throws IOException |
|
1234 |
{ |
|
1235 |
s.defaultWriteObject(); // write the fields |
|
1236 |
} |
|
1237 |
||
1238 |
/** |
|
1239 |
* readObject is called to restore the state of the URL from the |
|
1240 |
* stream. It reads the components of the URL and finds the local |
|
1241 |
* stream handler. |
|
1242 |
*/ |
|
1243 |
private synchronized void readObject(java.io.ObjectInputStream s) |
|
1244 |
throws IOException, ClassNotFoundException |
|
1245 |
{ |
|
1246 |
s.defaultReadObject(); // read the fields |
|
1247 |
if ((handler = getURLStreamHandler(protocol)) == null) { |
|
1248 |
throw new IOException("unknown protocol: " + protocol); |
|
1249 |
} |
|
1250 |
||
1251 |
// Construct authority part |
|
1252 |
if (authority == null && |
|
1253 |
((host != null && host.length() > 0) || port != -1)) { |
|
1254 |
if (host == null) |
|
1255 |
host = ""; |
|
1256 |
authority = (port == -1) ? host : host + ":" + port; |
|
1257 |
||
1258 |
// Handle hosts with userInfo in them |
|
1259 |
int at = host.lastIndexOf('@'); |
|
1260 |
if (at != -1) { |
|
1261 |
userInfo = host.substring(0, at); |
|
1262 |
host = host.substring(at+1); |
|
1263 |
} |
|
1264 |
} else if (authority != null) { |
|
1265 |
// Construct user info part |
|
1266 |
int ind = authority.indexOf('@'); |
|
1267 |
if (ind != -1) |
|
1268 |
userInfo = authority.substring(0, ind); |
|
1269 |
} |
|
1270 |
||
1271 |
// Construct path and query part |
|
1272 |
path = null; |
|
1273 |
query = null; |
|
1274 |
if (file != null) { |
|
1275 |
// Fix: only do this if hierarchical? |
|
1276 |
int q = file.lastIndexOf('?'); |
|
1277 |
if (q != -1) { |
|
1278 |
query = file.substring(q+1); |
|
1279 |
path = file.substring(0, q); |
|
1280 |
} else |
|
1281 |
path = file; |
|
1282 |
} |
|
1283 |
} |
|
1284 |
} |
|
1285 |
||
1286 |
class Parts { |
|
1287 |
String path, query, ref; |
|
1288 |
||
1289 |
Parts(String file) { |
|
1290 |
int ind = file.indexOf('#'); |
|
1291 |
ref = ind < 0 ? null: file.substring(ind + 1); |
|
1292 |
file = ind < 0 ? file: file.substring(0, ind); |
|
1293 |
int q = file.lastIndexOf('?'); |
|
1294 |
if (q != -1) { |
|
1295 |
query = file.substring(q+1); |
|
1296 |
path = file.substring(0, q); |
|
1297 |
} else { |
|
1298 |
path = file; |
|
1299 |
} |
|
1300 |
} |
|
1301 |
||
1302 |
String getPath() { |
|
1303 |
return path; |
|
1304 |
} |
|
1305 |
||
1306 |
String getQuery() { |
|
1307 |
return query; |
|
1308 |
} |
|
1309 |
||
1310 |
String getRef() { |
|
1311 |
return ref; |
|
1312 |
} |
|
1313 |
} |