1850 lines
70 KiB
Java
1850 lines
70 KiB
Java
/*
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* Copyright (c) 1995, 2025, 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.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.spi.URLStreamHandlerProvider;
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import java.nio.file.Path;
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import java.util.Hashtable;
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import java.io.InvalidObjectException;
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import java.io.ObjectStreamException;
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import java.io.ObjectStreamField;
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import java.io.ObjectInputStream.GetField;
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import java.util.Iterator;
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import java.util.Locale;
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import java.util.ServiceLoader;
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import jdk.internal.access.JavaNetURLAccess;
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import jdk.internal.access.SharedSecrets;
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import jdk.internal.misc.ThreadTracker;
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import jdk.internal.misc.VM;
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import sun.net.util.IPAddressUtil;
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import static jdk.internal.util.Exceptions.filterNonSocketInfo;
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import static jdk.internal.util.Exceptions.formatMsg;
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/**
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* Class {@code URL} 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} (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}. The information on that host
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* machine is named {@code /docs/resource1.html}. 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} is {@code 80}. 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} 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://www.example.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} 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://www.example.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://www.example.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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*
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* <h2><a id="constructor-deprecation"></a>Constructing instances of {@code URL}</h2>
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*
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* The {@code java.net.URL} constructors are deprecated.
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* Developers are encouraged to use {@link URI java.net.URI} to parse
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* or construct a {@code URL}. In cases where an instance of {@code
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* java.net.URL} is needed to open a connection, {@link URI} can be used
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* to construct or parse the URL string, possibly calling {@link
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* URI#parseServerAuthority()} to validate that the authority component
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* can be parsed as a server-based authority, and then calling
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* {@link URI#toURL()} to create the {@code URL} instance.
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* <p>
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* The URL constructors are specified to throw
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* {@link MalformedURLException} but the actual parsing/validation
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* that is performed is implementation dependent. Some parsing/validation
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* may be delayed until later, when the underlying {@linkplain
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* URLStreamHandler stream handler's implementation} is called.
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* Being able to construct an instance of {@code URL} doesn't
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* provide any guarantee about its conformance to the URL
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* syntax specification.
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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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* @apiNote
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*
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* <a id="integrity"></a>
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* Applications working with file paths and file URIs should take great
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* care to use the appropriate methods to convert between the two.
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* The {@link Path#of(URI)} factory method and the {@link File#File(URI)}
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* constructor can be used to create {@link Path} or {@link File}
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* objects from a file URI. {@link Path#toUri()} and {@link File#toURI()}
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* can be used to create a {@link URI} from a file path, which can be
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* converted to URL using {@link URI#toURL()}.
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* Applications should never try to {@linkplain #URL(String, String, String)
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* construct} or {@linkplain #URL(String) parse} a {@code URL}
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* from the direct string representation of a {@code File} or {@code Path}
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* instance.
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* <p>
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* Before constructing a {@code URL} from a {@code URI}, and depending
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* on the protocol involved, applications should consider validating
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* whether the URI authority {@linkplain URI#parseServerAuthority()
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* can be parsed as server-based}.
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* <p>
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* Some components of a URL or URI, such as <i>userinfo</i>, may
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* be abused to construct misleading URLs or URIs. Applications
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* that deal with URLs or URIs should take into account
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* the recommendations advised in <a
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* href="https://tools.ietf.org/html/rfc3986#section-7">RFC3986,
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* Section 7, Security Considerations</a>.
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* <p>
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* All {@code URL} constructors may throw {@link MalformedURLException}.
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* In particular, if the underlying {@link URLStreamHandler}
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* implementation rejects, or is known to reject, any of the parameters,
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* {@link MalformedURLException} may be thrown.
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* Typically, a constructor that calls the stream handler's {@linkplain
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* URLStreamHandler#parseURL(URL, String, int, int) parseURL method} may
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* throw {@code MalformedURLException} if the underlying stream handler
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* implementation of that method throws {@code IllegalArgumentException}.
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* However, which checks are performed, or not, by the stream handlers
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* is implementation dependent, and callers should not rely on such
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* checks for full URL validation.
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*
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* @spec https://www.rfc-editor.org/info/rfc2396
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* RFC 2396: Uniform Resource Identifiers (URI): Generic Syntax
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* @spec https://www.rfc-editor.org/info/rfc2732
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* RFC 2732: Format for Literal IPv6 Addresses in URL's
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* @spec https://www.rfc-editor.org/info/rfc3986
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* RFC 3986: Uniform Resource Identifier (URI): Generic Syntax
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* @author James Gosling
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* @since 1.0
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*/
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public final class URL implements java.io.Serializable {
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static final String BUILTIN_HANDLERS_PREFIX = "sun.net.www.protocol";
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@java.io.Serial
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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} is
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* defined as {@code path[?query]}
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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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private 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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private transient UrlDeserializedState tempState;
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/**
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* Creates a {@code URL} object from the specified
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* {@code protocol}, {@code host}, {@code port}
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* number, and {@code file}.<p>
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*
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* {@code host} 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 ({@code '['} and {@code ']'}), 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} number of {@code -1}
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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}, 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} as the stream handler factory,
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* then the {@code createURLStreamHandler} 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} has yet been set up,
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* or if the factory's {@code createURLStreamHandler} method
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* returns {@code null}, then the {@linkplain java.util.ServiceLoader
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* ServiceLoader} mechanism is used to locate {@linkplain
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* java.net.spi.URLStreamHandlerProvider URLStreamHandlerProvider}
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* implementations using the system class
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* loader. The order that providers are located is implementation
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* specific, and an implementation is free to cache the located
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* providers. A {@linkplain java.util.ServiceConfigurationError
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* ServiceConfigurationError}, {@code Error} or {@code RuntimeException}
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* thrown from the {@code createURLStreamHandler}, if encountered, will
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* be propagated to the calling thread. The {@code
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* createURLStreamHandler} method of each provider, if instantiated, is
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* invoked, with the protocol string, until a provider returns non-null,
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* or all providers have been exhausted.
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* <li>If the previous step fails to find a protocol handler, the
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* constructor reads the value of the system property:
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* <blockquote>{@systemProperty
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* java.protocol.handler.pkgs
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* }</blockquote>
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* If the value of that system property is not {@code null},
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* it is interpreted as a list of packages separated by a vertical
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* slash character '{@code |}'. The constructor tries to load
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* the class named:
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* <blockquote>{@code
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* <package>.<protocol>.Handler
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* }</blockquote>
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* where {@code <package>} is replaced by the name of the package
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* and {@code <protocol>} 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}, 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 a built-in protocol handler.
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* If this class does not exist, or if the class exists but it is not a
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* subclass of {@code URLStreamHandler}, then a
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* {@code MalformedURLException} is thrown.
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* </ol>
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*
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* <p>Protocol handlers for the following protocols are guaranteed
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* to exist on the search path:
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* <ul>
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* <li>{@code http}</li>
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* <li>{@code https}</li>
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* <li>{@code file}</li>
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* <li>{@code jar}</li>
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* </ul>
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* Protocol handlers for additional protocols may also be available.
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* Some protocol handlers, for example those used for loading platform
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* classes or classes on the class path, may not be overridden. The details
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* of such restrictions, and when those restrictions apply (during
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* initialization of the runtime for example), are implementation specific
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* and therefore not specified
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*
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* <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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* @throws MalformedURLException if an unknown protocol or the port
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* is a negative number other than -1, or if the
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* underlying stream handler implementation rejects,
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* or is known to reject, the {@code URL}
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* @spec https://www.rfc-editor.org/info/rfc2373 RFC 2373: IP Version 6 Addressing Architecture
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* @spec https://www.rfc-editor.org/info/rfc2732 RFC 2732: Format for Literal IPv6 Addresses in URL's
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* @see java.lang.System#getProperty(java.lang.String)
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* @see java.net.URL#setURLStreamHandlerFactory(
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* java.net.URLStreamHandlerFactory)
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* @see java.net.URLStreamHandler
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* @see java.net.URLStreamHandlerFactory#createURLStreamHandler(
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* java.lang.String)
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* @deprecated Use {@link URI#toURL()} to construct an instance of URL. See the note on
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* <a href="#constructor-deprecation">constructor deprecation</a> for more
|
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* details.
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*/
|
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@Deprecated(since = "20")
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public URL(String protocol, String host, int port, String file)
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throws MalformedURLException
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{
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this(protocol, host, port, file, null);
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}
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/**
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* Creates a URL from the specified {@code protocol}
|
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* name, {@code host} name, and {@code file} name. The
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* default port for the specified protocol is used.
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* <p>
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* This constructor is equivalent to the four-argument
|
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* constructor with the only difference of using the
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* default port for the specified protocol.
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*
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* 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 file the file on the host.
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* @throws MalformedURLException if an unknown protocol is specified,
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* or if the underlying stream handler implementation
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* rejects, or is known to reject, the {@code URL}
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* @see java.net.URL#URL(java.lang.String, java.lang.String,
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* int, java.lang.String)
|
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* @deprecated Use {@link URI#toURL()} to construct an instance of URL. See the note on
|
|
* <a href="#constructor-deprecation">constructor deprecation</a> for more
|
|
* details.
|
|
*/
|
|
@Deprecated(since = "20")
|
|
public URL(String protocol, String host, String file)
|
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throws MalformedURLException {
|
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this(protocol, host, -1, file);
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}
|
|
|
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/**
|
|
* Creates a {@code URL} object from the specified
|
|
* {@code protocol}, {@code host}, {@code port}
|
|
* number, {@code file}, and {@code handler}. Specifying
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* 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:
|
|
* {@link java.net.URL#URL(java.lang.String, java.lang.String, int,
|
|
* java.lang.String)}
|
|
*
|
|
* 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.
|
|
* @throws MalformedURLException if an unknown protocol or the port
|
|
* is a negative number other than -1,
|
|
* or if the underlying stream handler implementation
|
|
* rejects, or is known to reject, the {@code URL}
|
|
* @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)
|
|
* @deprecated
|
|
* Use {@link #of(URI, URLStreamHandler)} to construct an instance of URL
|
|
* associated with a custom protocol handler.
|
|
* See the note on <a href="#constructor-deprecation">constructor deprecation</a>
|
|
* for more details.
|
|
*/
|
|
@Deprecated(since = "20")
|
|
public URL(String protocol, String host, int port, String file,
|
|
URLStreamHandler handler) throws MalformedURLException {
|
|
|
|
protocol = lowerCaseProtocol(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 full 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;
|
|
if (host != null && isBuiltinStreamHandler(handler)) {
|
|
String s = IPAddressUtil.checkExternalForm(this);
|
|
if (s != null) {
|
|
throw new MalformedURLException(s);
|
|
}
|
|
}
|
|
if ("jar".equalsIgnoreCase(protocol)) {
|
|
if (handler instanceof sun.net.www.protocol.jar.Handler) {
|
|
// URL.openConnection() would throw a confusing exception
|
|
// so generate a better exception here instead.
|
|
String s = ((sun.net.www.protocol.jar.Handler) handler).checkNestedProtocol(file);
|
|
if (s != null) {
|
|
throw new MalformedURLException(s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
* @throws 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, or the
|
|
* underlying stream handler's {@linkplain
|
|
* URLStreamHandler#parseURL parseURL method} throws
|
|
* {@code IllegalArgumentException}
|
|
* @see java.net.URL#URL(java.net.URL, java.lang.String)
|
|
* @deprecated Use {@link URI#toURL()} to construct an instance of URL. See the note on
|
|
* <a href="#constructor-deprecation">constructor deprecation</a> for more
|
|
* details.
|
|
*/
|
|
@Deprecated(since = "20")
|
|
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.
|
|
*
|
|
* @implSpec Parsing the URL includes calling the {@link
|
|
* URLStreamHandler#parseURL(URL, String, int, int) parseURL} method on the
|
|
* selected handler.
|
|
*
|
|
* @param context the context in which to parse the specification.
|
|
* @param spec the {@code String} to parse as a URL.
|
|
* @throws 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, or the
|
|
* underlying stream handler's {@linkplain
|
|
* URLStreamHandler#parseURL parseURL method} throws
|
|
* {@code IllegalArgumentException}
|
|
* @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)
|
|
* @deprecated Use {@link URI#toURL()} to construct an instance of URL. See the note on
|
|
* <a href="#constructor-deprecation">constructor deprecation</a> for more
|
|
* details.
|
|
*/
|
|
@Deprecated(since = "20")
|
|
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.
|
|
*
|
|
* @implSpec Parsing the URL includes calling the {@link
|
|
* URLStreamHandler#parseURL(URL, String, int, int) parseURL} method on the
|
|
* selected handler.
|
|
*
|
|
* @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.
|
|
* @throws 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, or the
|
|
* underlying stream handler's {@linkplain
|
|
* URLStreamHandler#parseURL(URL, String, int, int)
|
|
* parseURL method} throws {@code IllegalArgumentException}
|
|
* @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)
|
|
* @deprecated
|
|
* Use {@link #of(URI, URLStreamHandler)} to construct an instance of URL
|
|
* associated with a custom protocol handler.
|
|
* See the note on <a href="#constructor-deprecation">constructor deprecation</a>
|
|
* for more details.
|
|
*/
|
|
@Deprecated(since = "20")
|
|
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;
|
|
|
|
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 = lowerCaseProtocol(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()}, but
|
|
* associating it with the given {@code URLStreamHandler}, if allowed.
|
|
*
|
|
* @apiNote
|
|
* Applications should consider performing additional integrity
|
|
* checks before constructing a {@code URL} and opening a connection.
|
|
* See the <a href=#integrity>API note</a> in the class level API
|
|
* documentation.
|
|
*
|
|
* @implSpec The implementation of this method includes calling the {@link
|
|
* URLStreamHandler#parseURL(URL, String, int, int) parseURL} method on the
|
|
* selected handler.
|
|
*
|
|
* @param uri the {@code URI} from which the returned {@code URL} should
|
|
* be built
|
|
* @param handler a custom protocol stream handler for
|
|
* the returned {@code URL}. Can be {@code null},
|
|
* in which case the default stream handler for
|
|
* the protocol if any, will be used.
|
|
*
|
|
* @return a new {@code URL} instance created from the given {@code URI}
|
|
* and associated with the given {@code URLStreamHandler}, if any
|
|
*
|
|
* @throws NullPointerException if {@code uri} is {@code null}
|
|
*
|
|
* @throws IllegalArgumentException if no protocol is specified
|
|
* (the {@linkplain URI#getScheme() uri scheme} is {@code null}), or
|
|
* if the {@code URLStreamHandler} is not {@code null} and can not be
|
|
* set for the given protocol
|
|
*
|
|
* @throws MalformedURLException if an unknown protocol is found,
|
|
* or the given URI fails to comply with the specific
|
|
* syntax of the associated protocol, or the
|
|
* underlying stream handler's {@linkplain
|
|
* URLStreamHandler#parseURL(URL, String, int, int)
|
|
* parseURL method} throws {@code IllegalArgumentException}
|
|
*
|
|
* @see java.net.URI#toURL()
|
|
*
|
|
* @since 20
|
|
*/
|
|
public static URL of(URI uri, URLStreamHandler handler)
|
|
throws MalformedURLException {
|
|
if (!uri.isAbsolute()) {
|
|
throw new IllegalArgumentException("URI is not absolute");
|
|
}
|
|
|
|
String protocol = uri.getScheme();
|
|
|
|
// fast path for canonical jrt:/... URLs
|
|
//
|
|
// In general we need to go via Handler.parseURL, but for the jrt
|
|
// protocol we enforce that the Handler is not overridable and can
|
|
// optimize URI to URL conversion.
|
|
//
|
|
// Case-sensitive comparison for performance; malformed protocols will
|
|
// be handled correctly by the slow path.
|
|
if (handler == null && protocol.equals("jrt") && !uri.isOpaque()
|
|
&& uri.getRawAuthority() == null
|
|
&& 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);
|
|
}
|
|
|
|
// slow path (will work for non-canonical forms of jrt: too)
|
|
|
|
if ("url".equalsIgnoreCase(protocol)) {;
|
|
String uristr = uri.toString();
|
|
try {
|
|
URI inner = new URI(uristr.substring(4));
|
|
if (inner.isAbsolute()) {
|
|
protocol = inner.getScheme();
|
|
}
|
|
} catch (URISyntaxException use) {
|
|
throw new MalformedURLException(use.getMessage());
|
|
}
|
|
}
|
|
|
|
if (handler != null && !isOverrideable(protocol)) {
|
|
throw new IllegalArgumentException("Can't override URLStreamHandler for protocol "
|
|
+ protocol);
|
|
}
|
|
|
|
return new URL((URL)null, uri.toString(), handler);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the address of the host represented by this URL.
|
|
* An {@link UnknownHostException} while getting the host address
|
|
* will result in this method returning {@code null}.
|
|
*
|
|
* @return an {@link InetAddress} representing the host
|
|
*/
|
|
synchronized InetAddress getHostAddress() {
|
|
if (hostAddress != null) {
|
|
return hostAddress;
|
|
}
|
|
|
|
if (host == null || host.isEmpty()) {
|
|
return null;
|
|
}
|
|
try {
|
|
hostAddress = InetAddress.getByName(host);
|
|
} catch (UnknownHostException e) {
|
|
return null;
|
|
}
|
|
return hostAddress;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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 u2))
|
|
return false;
|
|
|
|
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.
|
|
*
|
|
* @throws 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 {
|
|
URI uri = new URI(toString());
|
|
if (authority != null && isBuiltinStreamHandler(handler)) {
|
|
String s = IPAddressUtil.checkAuthority(this);
|
|
if (s != null)
|
|
throw new URISyntaxException(formatMsg("%s", filterNonSocketInfo(authority)), s);
|
|
}
|
|
return uri;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
* @throws 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.
|
|
* @throws IOException if an I/O exception occurs.
|
|
* @throws IllegalArgumentException will be thrown if proxy is null,
|
|
* or proxy has the wrong type
|
|
* @throws 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);
|
|
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.
|
|
* @throws 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.
|
|
* @throws 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.
|
|
* @throws 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.
|
|
*
|
|
* @param fac the desired factory.
|
|
* @throws Error if the application has already set a factory.
|
|
* @see java.net.URL#URL(java.lang.String, java.lang.String,
|
|
* int, java.lang.String)
|
|
* @see java.net.URLStreamHandlerFactory
|
|
*/
|
|
public static void setURLStreamHandlerFactory(URLStreamHandlerFactory fac) {
|
|
synchronized (streamHandlerLock) {
|
|
if (factory != null) {
|
|
throw new Error("factory already defined");
|
|
}
|
|
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 final String PREFIX = "sun.net.www.protocol.";
|
|
|
|
public URLStreamHandler createURLStreamHandler(String protocol) {
|
|
// Avoid using reflection during bootstrap
|
|
switch (protocol) {
|
|
case "file":
|
|
return new sun.net.www.protocol.file.Handler();
|
|
case "jar":
|
|
return new sun.net.www.protocol.jar.Handler();
|
|
case "jrt":
|
|
return new sun.net.www.protocol.jrt.Handler();
|
|
}
|
|
String name = PREFIX + protocol + ".Handler";
|
|
try {
|
|
Object o = Class.forName(name).getDeclaredConstructor().newInstance();
|
|
return (URLStreamHandler)o;
|
|
} 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 = System.getProperty(protocolPathProp);
|
|
if (packagePrefixList == null || packagePrefixList.isEmpty()) {
|
|
// 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();
|
|
if (packagePrefix.isEmpty()) {
|
|
continue;
|
|
}
|
|
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 class ThreadTrackHolder {
|
|
static final ThreadTracker TRACKER = new ThreadTracker();
|
|
}
|
|
|
|
private static Object tryBeginLookup() {
|
|
return ThreadTrackHolder.TRACKER.tryBegin();
|
|
}
|
|
|
|
private static void endLookup(Object key) {
|
|
ThreadTrackHolder.TRACKER.end(key);
|
|
}
|
|
|
|
private static URLStreamHandler lookupViaProviders(final String protocol) {
|
|
Object key = tryBeginLookup();
|
|
if (key == null) {
|
|
throw new Error("Circular loading of URL stream handler providers detected");
|
|
}
|
|
try {
|
|
final ClassLoader cl = ClassLoader.getSystemClassLoader();
|
|
final ServiceLoader<URLStreamHandlerProvider> sl =
|
|
ServiceLoader.load(URLStreamHandlerProvider.class, cl);
|
|
final Iterator<URLStreamHandlerProvider> itr = sl.iterator();
|
|
while (itr.hasNext()) {
|
|
URLStreamHandlerProvider f = itr.next();
|
|
URLStreamHandler h = f.createURLStreamHandler(protocol);
|
|
if (h != null)
|
|
return h;
|
|
}
|
|
return null;
|
|
} finally {
|
|
endLookup(key);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the protocol in lower case. Special cases known protocols
|
|
* to avoid loading locale classes during startup.
|
|
*/
|
|
static String lowerCaseProtocol(String protocol) {
|
|
if (protocol.equals("jrt")) {
|
|
return "jrt";
|
|
} else if (protocol.equals("file")) {
|
|
return "file";
|
|
} else if (protocol.equals("jar")) {
|
|
return "jar";
|
|
} 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.
|
|
*/
|
|
private static final 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;
|
|
boolean overrideableProtocol = isOverrideable(protocol);
|
|
|
|
if (overrideableProtocol && 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 (overrideableProtocol && !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 the protocol to use (ftp, http, nntp, ... etc.)
|
|
*
|
|
* @serialField host String the host name to connect to
|
|
*
|
|
* @serialField port int the protocol port to connect to
|
|
*
|
|
* @serialField authority String the authority part of this URL
|
|
*
|
|
* @serialField file String the specified file name on that host. {@code file} is
|
|
* defined as {@code path[?query]}
|
|
*
|
|
* @serialField ref String the fragment part of this URL
|
|
*
|
|
* @serialField hashCode int the hashCode of this URL
|
|
*
|
|
*/
|
|
@java.io.Serial
|
|
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.
|
|
*
|
|
* @param s the {@code ObjectOutputStream} to which data is written
|
|
* @throws IOException if an I/O error occurs
|
|
*/
|
|
@java.io.Serial
|
|
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.
|
|
*
|
|
* @param s the {@code ObjectInputStream} from which data is read
|
|
* @throws IOException if an I/O error occurs
|
|
* @throws ClassNotFoundException if a serialized class cannot be loaded
|
|
*/
|
|
@java.io.Serial
|
|
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
|
|
*/
|
|
@java.io.Serial
|
|
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;
|
|
}
|
|
|
|
boolean isBuiltinStreamHandler(URLStreamHandler handler) {
|
|
Class<?> handlerClass = handler.getClass();
|
|
return isBuiltinStreamHandler(handlerClass.getName())
|
|
|| VM.isSystemDomainLoader(handlerClass.getClassLoader());
|
|
}
|
|
|
|
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 StringBuilder
|
|
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();
|
|
}
|
|
}
|