- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 1999-2003 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xerces" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation and was
- * originally based on software copyright (c) 1999, iClick Inc.,
- * http://www.apache.org. For more information on the Apache Software
- * Foundation, please see <http://www.apache.org/>.
- */
-
-
- package com.sun.org.apache.xerces.internal.util;
-
- import java.io.IOException;
- import java.io.Serializable;
-
- /**********************************************************************
- * A class to represent a Uniform Resource Identifier (URI). This class
- * is designed to handle the parsing of URIs and provide access to
- * the various components (scheme, host, port, userinfo, path, query
- * string and fragment) that may constitute a URI.
- * <p>
- * Parsing of a URI specification is done according to the URI
- * syntax described in
- * <a href="http://www.ietf.org/rfc/rfc2396.txt?number=2396">RFC 2396</a>,
- * and amended by
- * <a href="http://www.ietf.org/rfc/rfc2732.txt?number=2732">RFC 2732</a>.
- * <p>
- * Every absolute URI consists of a scheme, followed by a colon (':'),
- * followed by a scheme-specific part. For URIs that follow the
- * "generic URI" syntax, the scheme-specific part begins with two
- * slashes ("//") and may be followed by an authority segment (comprised
- * of user information, host, and port), path segment, query segment
- * and fragment. Note that RFC 2396 no longer specifies the use of the
- * parameters segment and excludes the "user:password" syntax as part of
- * the authority segment. If "user:password" appears in a URI, the entire
- * user/password string is stored as userinfo.
- * <p>
- * For URIs that do not follow the "generic URI" syntax (e.g. mailto),
- * the entire scheme-specific part is treated as the "path" portion
- * of the URI.
- * <p>
- * Note that, unlike the java.net.URL class, this class does not provide
- * any built-in network access functionality nor does it provide any
- * scheme-specific functionality (for example, it does not know a
- * default port for a specific scheme). Rather, it only knows the
- * grammar and basic set of operations that can be applied to a URI.
- *
- * @version $Id: URI.java,v 1.17 2004/03/28 16:12:19 mrglavas Exp $
- *
- **********************************************************************/
- public class URI implements Serializable {
-
- /*******************************************************************
- * MalformedURIExceptions are thrown in the process of building a URI
- * or setting fields on a URI when an operation would result in an
- * invalid URI specification.
- *
- ********************************************************************/
- public static class MalformedURIException extends IOException {
-
- /******************************************************************
- * Constructs a <code>MalformedURIException</code> with no specified
- * detail message.
- ******************************************************************/
- public MalformedURIException() {
- super();
- }
-
- /*****************************************************************
- * Constructs a <code>MalformedURIException</code> with the
- * specified detail message.
- *
- * @param p_msg the detail message.
- ******************************************************************/
- public MalformedURIException(String p_msg) {
- super(p_msg);
- }
- }
-
- private static final byte [] fgLookupTable = new byte[128];
-
- /**
- * Character Classes
- */
-
- /** reserved characters ;/?:@&=+$,[] */
- //RFC 2732 added '[' and ']' as reserved characters
- private static final int RESERVED_CHARACTERS = 0x01;
-
- /** URI punctuation mark characters: -_.!~*'() - these, combined with
- alphanumerics, constitute the "unreserved" characters */
- private static final int MARK_CHARACTERS = 0x02;
-
- /** scheme can be composed of alphanumerics and these characters: +-. */
- private static final int SCHEME_CHARACTERS = 0x04;
-
- /** userinfo can be composed of unreserved, escaped and these
- characters: ;:&=+$, */
- private static final int USERINFO_CHARACTERS = 0x08;
-
- /** ASCII letter characters */
- private static final int ASCII_ALPHA_CHARACTERS = 0x10;
-
- /** ASCII digit characters */
- private static final int ASCII_DIGIT_CHARACTERS = 0x20;
-
- /** ASCII hex characters */
- private static final int ASCII_HEX_CHARACTERS = 0x40;
-
- /** Path characters */
- private static final int PATH_CHARACTERS = 0x80;
-
- /** Mask for alpha-numeric characters */
- private static final int MASK_ALPHA_NUMERIC = ASCII_ALPHA_CHARACTERS | ASCII_DIGIT_CHARACTERS;
-
- /** Mask for unreserved characters */
- private static final int MASK_UNRESERVED_MASK = MASK_ALPHA_NUMERIC | MARK_CHARACTERS;
-
- /** Mask for URI allowable characters except for % */
- private static final int MASK_URI_CHARACTER = MASK_UNRESERVED_MASK | RESERVED_CHARACTERS;
-
- /** Mask for scheme characters */
- private static final int MASK_SCHEME_CHARACTER = MASK_ALPHA_NUMERIC | SCHEME_CHARACTERS;
-
- /** Mask for userinfo characters */
- private static final int MASK_USERINFO_CHARACTER = MASK_UNRESERVED_MASK | USERINFO_CHARACTERS;
-
- /** Mask for path characters */
- private static final int MASK_PATH_CHARACTER = MASK_UNRESERVED_MASK | PATH_CHARACTERS;
-
- static {
- // Add ASCII Digits and ASCII Hex Numbers
- for (int i = '0'; i <= '9'; ++i) {
- fgLookupTable[i] |= ASCII_DIGIT_CHARACTERS | ASCII_HEX_CHARACTERS;
- }
-
- // Add ASCII Letters and ASCII Hex Numbers
- for (int i = 'A'; i <= 'F'; ++i) {
- fgLookupTable[i] |= ASCII_ALPHA_CHARACTERS | ASCII_HEX_CHARACTERS;
- fgLookupTable[i+0x00000020] |= ASCII_ALPHA_CHARACTERS | ASCII_HEX_CHARACTERS;
- }
-
- // Add ASCII Letters
- for (int i = 'G'; i <= 'Z'; ++i) {
- fgLookupTable[i] |= ASCII_ALPHA_CHARACTERS;
- fgLookupTable[i+0x00000020] |= ASCII_ALPHA_CHARACTERS;
- }
-
- // Add Reserved Characters
- fgLookupTable[';'] |= RESERVED_CHARACTERS;
- fgLookupTable['/'] |= RESERVED_CHARACTERS;
- fgLookupTable['?'] |= RESERVED_CHARACTERS;
- fgLookupTable[':'] |= RESERVED_CHARACTERS;
- fgLookupTable['@'] |= RESERVED_CHARACTERS;
- fgLookupTable['&'] |= RESERVED_CHARACTERS;
- fgLookupTable['='] |= RESERVED_CHARACTERS;
- fgLookupTable['+'] |= RESERVED_CHARACTERS;
- fgLookupTable['$'] |= RESERVED_CHARACTERS;
- fgLookupTable[','] |= RESERVED_CHARACTERS;
- fgLookupTable['['] |= RESERVED_CHARACTERS;
- fgLookupTable[']'] |= RESERVED_CHARACTERS;
-
- // Add Mark Characters
- fgLookupTable['-'] |= MARK_CHARACTERS;
- fgLookupTable['_'] |= MARK_CHARACTERS;
- fgLookupTable['.'] |= MARK_CHARACTERS;
- fgLookupTable['!'] |= MARK_CHARACTERS;
- fgLookupTable['~'] |= MARK_CHARACTERS;
- fgLookupTable['*'] |= MARK_CHARACTERS;
- fgLookupTable['\''] |= MARK_CHARACTERS;
- fgLookupTable['('] |= MARK_CHARACTERS;
- fgLookupTable[')'] |= MARK_CHARACTERS;
-
- // Add Scheme Characters
- fgLookupTable['+'] |= SCHEME_CHARACTERS;
- fgLookupTable['-'] |= SCHEME_CHARACTERS;
- fgLookupTable['.'] |= SCHEME_CHARACTERS;
-
- // Add Userinfo Characters
- fgLookupTable[';'] |= USERINFO_CHARACTERS;
- fgLookupTable[':'] |= USERINFO_CHARACTERS;
- fgLookupTable['&'] |= USERINFO_CHARACTERS;
- fgLookupTable['='] |= USERINFO_CHARACTERS;
- fgLookupTable['+'] |= USERINFO_CHARACTERS;
- fgLookupTable['$'] |= USERINFO_CHARACTERS;
- fgLookupTable[','] |= USERINFO_CHARACTERS;
-
- // Add Path Characters
- fgLookupTable[';'] |= PATH_CHARACTERS;
- fgLookupTable['/'] |= PATH_CHARACTERS;
- fgLookupTable[':'] |= PATH_CHARACTERS;
- fgLookupTable['@'] |= PATH_CHARACTERS;
- fgLookupTable['&'] |= PATH_CHARACTERS;
- fgLookupTable['='] |= PATH_CHARACTERS;
- fgLookupTable['+'] |= PATH_CHARACTERS;
- fgLookupTable['$'] |= PATH_CHARACTERS;
- fgLookupTable[','] |= PATH_CHARACTERS;
- }
-
- /** Stores the scheme (usually the protocol) for this URI. */
- private String m_scheme = null;
-
- /** If specified, stores the userinfo for this URI; otherwise null */
- private String m_userinfo = null;
-
- /** If specified, stores the host for this URI; otherwise null */
- private String m_host = null;
-
- /** If specified, stores the port for this URI; otherwise -1 */
- private int m_port = -1;
-
- /** If specified, stores the registry based authority for this URI; otherwise -1 */
- private String m_regAuthority = null;
-
- /** If specified, stores the path for this URI; otherwise null */
- private String m_path = null;
-
- /** If specified, stores the query string for this URI; otherwise
- null. */
- private String m_queryString = null;
-
- /** If specified, stores the fragment for this URI; otherwise null */
- private String m_fragment = null;
-
- private static boolean DEBUG = false;
-
- /**
- * Construct a new and uninitialized URI.
- */
- public URI() {
- }
-
- /**
- * Construct a new URI from another URI. All fields for this URI are
- * set equal to the fields of the URI passed in.
- *
- * @param p_other the URI to copy (cannot be null)
- */
- public URI(URI p_other) {
- initialize(p_other);
- }
-
- /**
- * Construct a new URI from a URI specification string. If the
- * specification follows the "generic URI" syntax, (two slashes
- * following the first colon), the specification will be parsed
- * accordingly - setting the scheme, userinfo, host,port, path, query
- * string and fragment fields as necessary. If the specification does
- * not follow the "generic URI" syntax, the specification is parsed
- * into a scheme and scheme-specific part (stored as the path) only.
- *
- * @param p_uriSpec the URI specification string (cannot be null or
- * empty)
- *
- * @exception MalformedURIException if p_uriSpec violates any syntax
- * rules
- */
- public URI(String p_uriSpec) throws MalformedURIException {
- this((URI)null, p_uriSpec);
- }
-
- /**
- * Construct a new URI from a base URI and a URI specification string.
- * The URI specification string may be a relative URI.
- *
- * @param p_base the base URI (cannot be null if p_uriSpec is null or
- * empty)
- * @param p_uriSpec the URI specification string (cannot be null or
- * empty if p_base is null)
- *
- * @exception MalformedURIException if p_uriSpec violates any syntax
- * rules
- */
- public URI(URI p_base, String p_uriSpec) throws MalformedURIException {
- initialize(p_base, p_uriSpec);
- }
-
- /**
- * Construct a new URI that does not follow the generic URI syntax.
- * Only the scheme and scheme-specific part (stored as the path) are
- * initialized.
- *
- * @param p_scheme the URI scheme (cannot be null or empty)
- * @param p_schemeSpecificPart the scheme-specific part (cannot be
- * null or empty)
- *
- * @exception MalformedURIException if p_scheme violates any
- * syntax rules
- */
- public URI(String p_scheme, String p_schemeSpecificPart)
- throws MalformedURIException {
- if (p_scheme == null || p_scheme.trim().length() == 0) {
- throw new MalformedURIException(
- "Cannot construct URI with null/empty scheme!");
- }
- if (p_schemeSpecificPart == null ||
- p_schemeSpecificPart.trim().length() == 0) {
- throw new MalformedURIException(
- "Cannot construct URI with null/empty scheme-specific part!");
- }
- setScheme(p_scheme);
- setPath(p_schemeSpecificPart);
- }
-
- /**
- * Construct a new URI that follows the generic URI syntax from its
- * component parts. Each component is validated for syntax and some
- * basic semantic checks are performed as well. See the individual
- * setter methods for specifics.
- *
- * @param p_scheme the URI scheme (cannot be null or empty)
- * @param p_host the hostname, IPv4 address or IPv6 reference for the URI
- * @param p_path the URI path - if the path contains '?' or '#',
- * then the query string and/or fragment will be
- * set from the path; however, if the query and
- * fragment are specified both in the path and as
- * separate parameters, an exception is thrown
- * @param p_queryString the URI query string (cannot be specified
- * if path is null)
- * @param p_fragment the URI fragment (cannot be specified if path
- * is null)
- *
- * @exception MalformedURIException if any of the parameters violates
- * syntax rules or semantic rules
- */
- public URI(String p_scheme, String p_host, String p_path,
- String p_queryString, String p_fragment)
- throws MalformedURIException {
- this(p_scheme, null, p_host, -1, p_path, p_queryString, p_fragment);
- }
-
- /**
- * Construct a new URI that follows the generic URI syntax from its
- * component parts. Each component is validated for syntax and some
- * basic semantic checks are performed as well. See the individual
- * setter methods for specifics.
- *
- * @param p_scheme the URI scheme (cannot be null or empty)
- * @param p_userinfo the URI userinfo (cannot be specified if host
- * is null)
- * @param p_host the hostname, IPv4 address or IPv6 reference for the URI
- * @param p_port the URI port (may be -1 for "unspecified"; cannot
- * be specified if host is null)
- * @param p_path the URI path - if the path contains '?' or '#',
- * then the query string and/or fragment will be
- * set from the path; however, if the query and
- * fragment are specified both in the path and as
- * separate parameters, an exception is thrown
- * @param p_queryString the URI query string (cannot be specified
- * if path is null)
- * @param p_fragment the URI fragment (cannot be specified if path
- * is null)
- *
- * @exception MalformedURIException if any of the parameters violates
- * syntax rules or semantic rules
- */
- public URI(String p_scheme, String p_userinfo,
- String p_host, int p_port, String p_path,
- String p_queryString, String p_fragment)
- throws MalformedURIException {
- if (p_scheme == null || p_scheme.trim().length() == 0) {
- throw new MalformedURIException("Scheme is required!");
- }
-
- if (p_host == null) {
- if (p_userinfo != null) {
- throw new MalformedURIException(
- "Userinfo may not be specified if host is not specified!");
- }
- if (p_port != -1) {
- throw new MalformedURIException(
- "Port may not be specified if host is not specified!");
- }
- }
-
- if (p_path != null) {
- if (p_path.indexOf('?') != -1 && p_queryString != null) {
- throw new MalformedURIException(
- "Query string cannot be specified in path and query string!");
- }
-
- if (p_path.indexOf('#') != -1 && p_fragment != null) {
- throw new MalformedURIException(
- "Fragment cannot be specified in both the path and fragment!");
- }
- }
-
- setScheme(p_scheme);
- setHost(p_host);
- setPort(p_port);
- setUserinfo(p_userinfo);
- setPath(p_path);
- setQueryString(p_queryString);
- setFragment(p_fragment);
- }
-
- /**
- * Initialize all fields of this URI from another URI.
- *
- * @param p_other the URI to copy (cannot be null)
- */
- private void initialize(URI p_other) {
- m_scheme = p_other.getScheme();
- m_userinfo = p_other.getUserinfo();
- m_host = p_other.getHost();
- m_port = p_other.getPort();
- m_regAuthority = p_other.getRegBasedAuthority();
- m_path = p_other.getPath();
- m_queryString = p_other.getQueryString();
- m_fragment = p_other.getFragment();
- }
-
- /**
- * Initializes this URI from a base URI and a URI specification string.
- * See RFC 2396 Section 4 and Appendix B for specifications on parsing
- * the URI and Section 5 for specifications on resolving relative URIs
- * and relative paths.
- *
- * @param p_base the base URI (may be null if p_uriSpec is an absolute
- * URI)
- * @param p_uriSpec the URI spec string which may be an absolute or
- * relative URI (can only be null/empty if p_base
- * is not null)
- *
- * @exception MalformedURIException if p_base is null and p_uriSpec
- * is not an absolute URI or if
- * p_uriSpec violates syntax rules
- */
- private void initialize(URI p_base, String p_uriSpec)
- throws MalformedURIException {
-
- String uriSpec = p_uriSpec;
- int uriSpecLen = (uriSpec != null) ? uriSpec.length() : 0;
-
- if (p_base == null && uriSpecLen == 0) {
- throw new MalformedURIException(
- "Cannot initialize URI with empty parameters.");
- }
-
- // just make a copy of the base if spec is empty
- if (uriSpecLen == 0) {
- initialize(p_base);
- return;
- }
-
- int index = 0;
-
- // Check for scheme, which must be before '/', '?' or '#'. Also handle
- // names with DOS drive letters ('D:'), so 1-character schemes are not
- // allowed.
- int colonIdx = uriSpec.indexOf(':');
- if (colonIdx != -1) {
- final int searchFrom = colonIdx - 1;
- // search backwards starting from character before ':'.
- int slashIdx = uriSpec.lastIndexOf('/', searchFrom);
- int queryIdx = uriSpec.lastIndexOf('?', searchFrom);
- int fragmentIdx = uriSpec.lastIndexOf('#', searchFrom);
-
- if (colonIdx < 2 || slashIdx != -1 ||
- queryIdx != -1 || fragmentIdx != -1) {
- // A standalone base is a valid URI according to spec
- if (colonIdx == 0 || (p_base == null && fragmentIdx != 0)) {
- throw new MalformedURIException("No scheme found in URI.");
- }
- }
- else {
- initializeScheme(uriSpec);
- index = m_scheme.length()+1;
-
- // Neither 'scheme:' or 'scheme:#fragment' are valid URIs.
- if (colonIdx == uriSpecLen - 1 || uriSpec.charAt(colonIdx+1) == '#') {
- throw new MalformedURIException("Scheme specific part cannot be empty.");
- }
- }
- }
- else if (p_base == null && uriSpec.indexOf('#') != 0) {
- throw new MalformedURIException("No scheme found in URI.");
- }
-
- // Two slashes means we may have authority, but definitely means we're either
- // matching net_path or abs_path. These two productions are ambiguous in that
- // every net_path (except those containing an IPv6Reference) is an abs_path.
- // RFC 2396 resolves this ambiguity by applying a greedy left most matching rule.
- // Try matching net_path first, and if that fails we don't have authority so
- // then attempt to match abs_path.
- //
- // net_path = "//" authority [ abs_path ]
- // abs_path = "/" path_segments
- if (((index+1) < uriSpecLen) &&
- (uriSpec.charAt(index) == '/' && uriSpec.charAt(index+1) == '/')) {
- index += 2;
- int startPos = index;
-
- // Authority will be everything up to path, query or fragment
- char testChar = '\0';
- while (index < uriSpecLen) {
- testChar = uriSpec.charAt(index);
- if (testChar == '/' || testChar == '?' || testChar == '#') {
- break;
- }
- index++;
- }
-
- // Attempt to parse authority. If the section is an empty string
- // this is a valid server based authority, so set the host to this
- // value.
- if (index > startPos) {
- // If we didn't find authority we need to back up. Attempt to
- // match against abs_path next.
- if (!initializeAuthority(uriSpec.substring(startPos, index))) {
- index = startPos - 2;
- }
- }
- else {
- m_host = "";
- }
- }
-
- initializePath(uriSpec, index);
-
- // Resolve relative URI to base URI - see RFC 2396 Section 5.2
- // In some cases, it might make more sense to throw an exception
- // (when scheme is specified is the string spec and the base URI
- // is also specified, for example), but we're just following the
- // RFC specifications
- if (p_base != null) {
-
- // check to see if this is the current doc - RFC 2396 5.2 #2
- // note that this is slightly different from the RFC spec in that
- // we don't include the check for query string being null
- // - this handles cases where the urispec is just a query
- // string or a fragment (e.g. "?y" or "#s") -
- // see <http://www.ics.uci.edu/~fielding/url/test1.html> which
- // identified this as a bug in the RFC
- if (m_path.length() == 0 && m_scheme == null &&
- m_host == null && m_regAuthority == null) {
- m_scheme = p_base.getScheme();
- m_userinfo = p_base.getUserinfo();
- m_host = p_base.getHost();
- m_port = p_base.getPort();
- m_regAuthority = p_base.getRegBasedAuthority();
- m_path = p_base.getPath();
-
- if (m_queryString == null) {
- m_queryString = p_base.getQueryString();
- }
- return;
- }
-
- // check for scheme - RFC 2396 5.2 #3
- // if we found a scheme, it means absolute URI, so we're done
- if (m_scheme == null) {
- m_scheme = p_base.getScheme();
- }
- else {
- return;
- }
-
- // check for authority - RFC 2396 5.2 #4
- // if we found a host, then we've got a network path, so we're done
- if (m_host == null && m_regAuthority == null) {
- m_userinfo = p_base.getUserinfo();
- m_host = p_base.getHost();
- m_port = p_base.getPort();
- m_regAuthority = p_base.getRegBasedAuthority();
- }
- else {
- return;
- }
-
- // check for absolute path - RFC 2396 5.2 #5
- if (m_path.length() > 0 &&
- m_path.startsWith("/")) {
- return;
- }
-
- // if we get to this point, we need to resolve relative path
- // RFC 2396 5.2 #6
- String path = "";
- String basePath = p_base.getPath();
-
- // 6a - get all but the last segment of the base URI path
- if (basePath != null && basePath.length() > 0) {
- int lastSlash = basePath.lastIndexOf('/');
- if (lastSlash != -1) {
- path = basePath.substring(0, lastSlash+1);
- }
- }
- else if (m_path.length() > 0) {
- path = "/";
- }
-
- // 6b - append the relative URI path
- path = path.concat(m_path);
-
- // 6c - remove all "./" where "." is a complete path segment
- index = -1;
- while ((index = path.indexOf("/./")) != -1) {
- path = path.substring(0, index+1).concat(path.substring(index+3));
- }
-
- // 6d - remove "." if path ends with "." as a complete path segment
- if (path.endsWith("/.")) {
- path = path.substring(0, path.length()-1);
- }
-
- // 6e - remove all "<segment>/../" where "<segment>" is a complete
- // path segment not equal to ".."
- index = 1;
- int segIndex = -1;
- String tempString = null;
-
- while ((index = path.indexOf("/../", index)) > 0) {
- tempString = path.substring(0, path.indexOf("/../"));
- segIndex = tempString.lastIndexOf('/');
- if (segIndex != -1) {
- if (!tempString.substring(segIndex).equals("..")) {
- path = path.substring(0, segIndex+1).concat(path.substring(index+4));
- index = segIndex;
- }
- else
- index += 4;
- }
- else
- index += 4;
- }
-
- // 6f - remove ending "<segment>/.." where "<segment>" is a
- // complete path segment
- if (path.endsWith("/..")) {
- tempString = path.substring(0, path.length()-3);
- segIndex = tempString.lastIndexOf('/');
- if (segIndex != -1) {
- path = path.substring(0, segIndex+1);
- }
- }
- m_path = path;
- }
- }
-
- /**
- * Initialize the scheme for this URI from a URI string spec.
- *
- * @param p_uriSpec the URI specification (cannot be null)
- *
- * @exception MalformedURIException if URI does not have a conformant
- * scheme
- */
- private void initializeScheme(String p_uriSpec)
- throws MalformedURIException {
- int uriSpecLen = p_uriSpec.length();
- int index = 0;
- String scheme = null;
- char testChar = '\0';
-
- while (index < uriSpecLen) {
- testChar = p_uriSpec.charAt(index);
- if (testChar == ':' || testChar == '/' ||
- testChar == '?' || testChar == '#') {
- break;
- }
- index++;
- }
- scheme = p_uriSpec.substring(0, index);
-
- if (scheme.length() == 0) {
- throw new MalformedURIException("No scheme found in URI.");
- }
- else {
- setScheme(scheme);
- }
- }
-
- /**
- * Initialize the authority (either server or registry based)
- * for this URI from a URI string spec.
- *
- * @param p_uriSpec the URI specification (cannot be null)
- *
- * @return true if the given string matched server or registry
- * based authority
- */
- private boolean initializeAuthority(String p_uriSpec) {
-
- int index = 0;
- int start = 0;
- int end = p_uriSpec.length();
-
- char testChar = '\0';
- String userinfo = null;
-
- // userinfo is everything up to @
- if (p_uriSpec.indexOf('@', start) != -1) {
- while (index < end) {
- testChar = p_uriSpec.charAt(index);
- if (testChar == '@') {
- break;
- }
- index++;
- }
- userinfo = p_uriSpec.substring(start, index);
- index++;
- }
-
- // host is everything up to last ':', or up to
- // and including ']' if followed by ':'.
- String host = null;
- start = index;
- boolean hasPort = false;
- if (index < end) {
- if (p_uriSpec.charAt(start) == '[') {
- int bracketIndex = p_uriSpec.indexOf(']', start);
- index = (bracketIndex != -1) ? bracketIndex : end;
- if (index+1 < end && p_uriSpec.charAt(index+1) == ':') {
- ++index;
- hasPort = true;
- }
- else {
- index = end;
- }
- }
- else {
- int colonIndex = p_uriSpec.lastIndexOf(':', end);
- index = (colonIndex > start) ? colonIndex : end;
- hasPort = (index != end);
- }
- }
- host = p_uriSpec.substring(start, index);
- int port = -1;
- if (host.length() > 0) {
- // port
- if (hasPort) {
- index++;
- start = index;
- while (index < end) {
- index++;
- }
- String portStr = p_uriSpec.substring(start, index);
- if (portStr.length() > 0) {
- // REVISIT: Remove this code.
- /** for (int i = 0; i < portStr.length(); i++) {
- if (!isDigit(portStr.charAt(i))) {
- throw new MalformedURIException(
- portStr +
- " is invalid. Port should only contain digits!");
- }
- }**/
- // REVISIT: Remove this code.
- // Store port value as string instead of integer.
- try {
- port = Integer.parseInt(portStr);
- if (port == -1) --port;
- }
- catch (NumberFormatException nfe) {
- port = -2;
- }
- }
- }
- }
-
- if (isValidServerBasedAuthority(host, port, userinfo)) {
- m_host = host;
- m_port = port;
- m_userinfo = userinfo;
- return true;
- }
- // Note: Registry based authority is being removed from a
- // new spec for URI which would obsolete RFC 2396. If the
- // spec is added to XML errata, processing of reg_name
- // needs to be removed. - mrglavas.
- else if (isValidRegistryBasedAuthority(p_uriSpec)) {
- m_regAuthority = p_uriSpec;
- return true;
- }
- return false;
- }
-
- /**
- * Determines whether the components host, port, and user info
- * are valid as a server authority.
- *
- * @param host the host component of authority
- * @param port the port number component of authority
- * @param userinfo the user info component of authority
- *
- * @return true if the given host, port, and userinfo compose
- * a valid server authority
- */
- private boolean isValidServerBasedAuthority(String host, int port, String userinfo) {
-
- // Check if the host is well formed.
- if (!isWellFormedAddress(host)) {
- return false;
- }
-
- // Check that port is well formed if it exists.
- // REVISIT: There's no restriction on port value ranges, but
- // perform the same check as in setPort to be consistent. Pass
- // in a string to this method instead of an integer.
- if (port < -1 || port > 65535) {
- return false;
- }
-
- // Check that userinfo is well formed if it exists.
- if (userinfo != null) {
- // Userinfo can contain alphanumerics, mark characters, escaped
- // and ';',':','&','=','+','$',','
- int index = 0;
- int end = userinfo.length();
- char testChar = '\0';
- while (index < end) {
- testChar = userinfo.charAt(index);
- if (testChar == '%') {
- if (index+2 >= end ||
- !isHex(userinfo.charAt(index+1)) ||
- !isHex(userinfo.charAt(index+2))) {
- return false;
- }
- index += 2;
- }
- else if (!isUserinfoCharacter(testChar)) {
- return false;
- }
- ++index;
- }
- }
- return true;
- }
-
- /**
- * Determines whether the given string is a registry based authority.
- *
- * @param authority the authority component of a URI
- *
- * @return true if the given string is a registry based authority
- */
- private boolean isValidRegistryBasedAuthority(String authority) {
- int index = 0;
- int end = authority.length();
- char testChar;
-
- while (index < end) {
- testChar = authority.charAt(index);
-
- // check for valid escape sequence
- if (testChar == '%') {
- if (index+2 >= end ||
- !isHex(authority.charAt(index+1)) ||
- !isHex(authority.charAt(index+2))) {
- return false;
- }
- index += 2;
- }
- // can check against path characters because the set
- // is the same except for '/' which we've already excluded.
- else if (!isPathCharacter(testChar)) {
- return false;
- }
- ++index;
- }
- return true;
- }
-
- /**
- * Initialize the path for this URI from a URI string spec.
- *
- * @param p_uriSpec the URI specification (cannot be null)
- * @param p_nStartIndex the index to begin scanning from
- *
- * @exception MalformedURIException if p_uriSpec violates syntax rules
- */
- private void initializePath(String p_uriSpec, int p_nStartIndex)
- throws MalformedURIException {
- if (p_uriSpec == null) {
- throw new MalformedURIException(
- "Cannot initialize path from null string!");
- }
-
- int index = p_nStartIndex;
- int start = p_nStartIndex;
- int end = p_uriSpec.length();
- char testChar = '\0';
-
- // path - everything up to query string or fragment
- if (start < end) {
- // RFC 2732 only allows '[' and ']' to appear in the opaque part.
- if (getScheme() == null || p_uriSpec.charAt(start) == '/') {
-
- // Scan path.
- // abs_path = "/" path_segments
- // rel_path = rel_segment [ abs_path ]
- while (index < end) {
- testChar = p_uriSpec.charAt(index);
-
- // check for valid escape sequence
- if (testChar == '%') {
- if (index+2 >= end ||
- !isHex(p_uriSpec.charAt(index+1)) ||
- !isHex(p_uriSpec.charAt(index+2))) {
- throw new MalformedURIException(
- "Path contains invalid escape sequence!");
- }
- index += 2;
- }
- // Path segments cannot contain '[' or ']' since pchar
- // production was not changed by RFC 2732.
- else if (!isPathCharacter(testChar)) {
- if (testChar == '?' || testChar == '#') {
- break;
- }
- throw new MalformedURIException(
- "Path contains invalid character: " + testChar);
- }
- ++index;
- }
- }
- else {
-
- // Scan opaque part.
- // opaque_part = uric_no_slash *uric
- while (index < end) {
- testChar = p_uriSpec.charAt(index);
-
- if (testChar == '?' || testChar == '#') {
- break;
- }
-
- // check for valid escape sequence
- if (testChar == '%') {
- if (index+2 >= end ||
- !isHex(p_uriSpec.charAt(index+1)) ||
- !isHex(p_uriSpec.charAt(index+2))) {
- throw new MalformedURIException(
- "Opaque part contains invalid escape sequence!");
- }
- index += 2;
- }
- // If the scheme specific part is opaque, it can contain '['
- // and ']'. uric_no_slash wasn't modified by RFC 2732, which
- // I've interpreted as an error in the spec, since the
- // production should be equivalent to (uric - '/'), and uric
- // contains '[' and ']'. - mrglavas
- else if (!isURICharacter(testChar)) {
- throw new MalformedURIException(
- "Opaque part contains invalid character: " + testChar);
- }
- ++index;
- }
- }
- }
- m_path = p_uriSpec.substring(start, index);
-
- // query - starts with ? and up to fragment or end
- if (testChar == '?') {
- index++;
- start = index;
- while (index < end) {
- testChar = p_uriSpec.charAt(index);
- if (testChar == '#') {
- break;
- }
- if (testChar == '%') {
- if (index+2 >= end ||
- !isHex(p_uriSpec.charAt(index+1)) ||
- !isHex(p_uriSpec.charAt(index+2))) {
- throw new MalformedURIException(
- "Query string contains invalid escape sequence!");
- }
- index += 2;
- }
- else if (!isURICharacter(testChar)) {
- throw new MalformedURIException(
- "Query string contains invalid character: " + testChar);
- }
- index++;
- }
- m_queryString = p_uriSpec.substring(start, index);
- }
-
- // fragment - starts with #
- if (testChar == '#') {
- index++;
- start = index;
- while (index < end) {
- testChar = p_uriSpec.charAt(index);
-
- if (testChar == '%') {
- if (index+2 >= end ||
- !isHex(p_uriSpec.charAt(index+1)) ||
- !isHex(p_uriSpec.charAt(index+2))) {
- throw new MalformedURIException(
- "Fragment contains invalid escape sequence!");
- }
- index += 2;
- }
- else if (!isURICharacter(testChar)) {
- throw new MalformedURIException(
- "Fragment contains invalid character: "+testChar);
- }
- index++;
- }
- m_fragment = p_uriSpec.substring(start, index);
- }
- }
-
- /**
- * Get the scheme for this URI.
- *
- * @return the scheme for this URI
- */
- public String getScheme() {
- return m_scheme;
- }
-
- /**
- * Get the scheme-specific part for this URI (everything following the
- * scheme and the first colon). See RFC 2396 Section 5.2 for spec.
- *
- * @return the scheme-specific part for this URI
- */
- public String getSchemeSpecificPart() {
- StringBuffer schemespec = new StringBuffer();
-
- if (m_host != null || m_regAuthority != null) {
- schemespec.append("//");
-
- // Server based authority.
- if (m_host != null) {
-
- if (m_userinfo != null) {
- schemespec.append(m_userinfo);
- schemespec.append('@');
- }
-
- schemespec.append(m_host);
-
- if (m_port != -1) {
- schemespec.append(':');
- schemespec.append(m_port);
- }
- }
- // Registry based authority.
- else {
- schemespec.append(m_regAuthority);
- }
- }
-
- if (m_path != null) {
- schemespec.append((m_path));
- }
-
- if (m_queryString != null) {
- schemespec.append('?');
- schemespec.append(m_queryString);
- }
-
- if (m_fragment != null) {
- schemespec.append('#');
- schemespec.append(m_fragment);
- }
-
- return schemespec.toString();
- }
-
- /**
- * Get the userinfo for this URI.
- *
- * @return the userinfo for this URI (null if not specified).
- */
- public String getUserinfo() {
- return m_userinfo;
- }
-
- /**
- * Get the host for this URI.
- *
- * @return the host for this URI (null if not specified).
- */
- public String getHost() {
- return m_host;
- }
-
- /**
- * Get the port for this URI.
- *
- * @return the port for this URI (-1 if not specified).
- */
- public int getPort() {
- return m_port;
- }
-
- /**
- * Get the registry based authority for this URI.
- *
- * @return the registry based authority (null if not specified).
- */
- public String getRegBasedAuthority() {
- return m_regAuthority;
- }
-
- /**
- * Get the path for this URI (optionally with the query string and
- * fragment).
- *
- * @param p_includeQueryString if true (and query string is not null),
- * then a "?" followed by the query string
- * will be appended
- * @param p_includeFragment if true (and fragment is not null),
- * then a "#" followed by the fragment
- * will be appended
- *
- * @return the path for this URI possibly including the query string
- * and fragment
- */
- public String getPath(boolean p_includeQueryString,
- boolean p_includeFragment) {
- StringBuffer pathString = new StringBuffer(m_path);
-
- if (p_includeQueryString && m_queryString != null) {
- pathString.append('?');
- pathString.append(m_queryString);
- }
-
- if (p_includeFragment && m_fragment != null) {
- pathString.append('#');
- pathString.append(m_fragment);
- }
- return pathString.toString();
- }
-
- /**
- * Get the path for this URI. Note that the value returned is the path
- * only and does not include the query string or fragment.
- *
- * @return the path for this URI.
- */
- public String getPath() {
- return m_path;
- }
-
- /**
- * Get the query string for this URI.
- *
- * @return the query string for this URI. Null is returned if there
- * was no "?" in the URI spec, empty string if there was a
- * "?" but no query string following it.
- */
- public String getQueryString() {
- return m_queryString;
- }
-
- /**
- * Get the fragment for this URI.
- *
- * @return the fragment for this URI. Null is returned if there
- * was no "#" in the URI spec, empty string if there was a
- * "#" but no fragment following it.
- */
- public String getFragment() {
- return m_fragment;
- }
-
- /**
- * Set the scheme for this URI. The scheme is converted to lowercase
- * before it is set.
- *
- * @param p_scheme the scheme for this URI (cannot be null)
- *
- * @exception MalformedURIException if p_scheme is not a conformant
- * scheme name
- */
- public void setScheme(String p_scheme) throws MalformedURIException {
- if (p_scheme == null) {
- throw new MalformedURIException(
- "Cannot set scheme from null string!");
- }
- if (!isConformantSchemeName(p_scheme)) {
- throw new MalformedURIException("The scheme is not conformant.");
- }
-
- m_scheme = p_scheme.toLowerCase();
- }
-
- /**
- * Set the userinfo for this URI. If a non-null value is passed in and
- * the host value is null, then an exception is thrown.
- *
- * @param p_userinfo the userinfo for this URI
- *
- * @exception MalformedURIException if p_userinfo contains invalid
- * characters
- */
- public void setUserinfo(String p_userinfo) throws MalformedURIException {
- if (p_userinfo == null) {
- m_userinfo = null;
- return;
- }
- else {
- if (m_host == null) {
- throw new MalformedURIException(
- "Userinfo cannot be set when host is null!");
- }
-
- // userinfo can contain alphanumerics, mark characters, escaped
- // and ';',':','&','=','+','$',','
- int index = 0;
- int end = p_userinfo.length();
- char testChar = '\0';
- while (index < end) {
- testChar = p_userinfo.charAt(index);
- if (testChar == '%') {
- if (index+2 >= end ||
- !isHex(p_userinfo.charAt(index+1)) ||
- !isHex(p_userinfo.charAt(index+2))) {
- throw new MalformedURIException(
- "Userinfo contains invalid escape sequence!");
- }
- }
- else if (!isUserinfoCharacter(testChar)) {
- throw new MalformedURIException(
- "Userinfo contains invalid character:"+testChar);
- }
- index++;
- }
- }
- m_userinfo = p_userinfo;
- }
-
- /**
- * <p>Set the host for this URI. If null is passed in, the userinfo
- * field is also set to null and the port is set to -1.</p>
- *
- * <p>Note: This method overwrites registry based authority if it
- * previously existed in this URI.</p>
- *
- * @param p_host the host for this URI
- *
- * @exception MalformedURIException if p_host is not a valid IP
- * address or DNS hostname.
- */
- public void setHost(String p_host) throws MalformedURIException {
- if (p_host == null || p_host.length() == 0) {
- if (p_host != null) {
- m_regAuthority = null;
- }
- m_host = p_host;
- m_userinfo = null;
- m_port = -1;
- return;
- }
- else if (!isWellFormedAddress(p_host)) {
- throw new MalformedURIException("Host is not a well formed address!");
- }
- m_host = p_host;
- m_regAuthority = null;
- }
-
- /**
- * Set the port for this URI. -1 is used to indicate that the port is
- * not specified, otherwise valid port numbers are between 0 and 65535.
- * If a valid port number is passed in and the host field is null,
- * an exception is thrown.
- *
- * @param p_port the port number for this URI
- *
- * @exception MalformedURIException if p_port is not -1 and not a
- * valid port number
- */
- public void setPort(int p_port) throws MalformedURIException {
- if (p_port >= 0 && p_port <= 65535) {
- if (m_host == null) {
- throw new MalformedURIException(
- "Port cannot be set when host is null!");
- }
- }
- else if (p_port != -1) {
- throw new MalformedURIException("Invalid port number!");
- }
- m_port = p_port;
- }
-
- /**
- * <p>Sets the registry based authority for this URI.</p>
- *
- * <p>Note: This method overwrites server based authority
- * if it previously existed in this URI.</p>
- *
- * @param authority the registry based authority for this URI
- *
- * @exception MalformedURIException it authority is not a
- * well formed registry based authority
- */
- public void setRegBasedAuthority(String authority)
- throws MalformedURIException {
-
- if (authority == null) {
- m_regAuthority = null;
- return;
- }
- // reg_name = 1*( unreserved | escaped | "$" | "," |
- // ";" | ":" | "@" | "&" | "=" | "+" )
- else if (authority.length() < 1 ||
- !isValidRegistryBasedAuthority(authority) ||
- authority.indexOf('/') != -1) {
- throw new MalformedURIException("Registry based authority is not well formed.");
- }
- m_regAuthority = authority;
- m_host = null;
- m_userinfo = null;
- m_port = -1;
- }
-
- /**
- * Set the path for this URI. If the supplied path is null, then the
- * query string and fragment are set to null as well. If the supplied
- * path includes a query string and/or fragment, these fields will be
- * parsed and set as well. Note that, for URIs following the "generic
- * URI" syntax, the path specified should start with a slash.
- * For URIs that do not follow the generic URI syntax, this method
- * sets the scheme-specific part.
- *
- * @param p_path the path for this URI (may be null)
- *
- * @exception MalformedURIException if p_path contains invalid
- * characters
- */
- public void setPath(String p_path) throws MalformedURIException {
- if (p_path == null) {
- m_path = null;
- m_queryString = null;
- m_fragment = null;
- }
- else {
- initializePath(p_path, 0);
- }
- }
-
- /**
- * Append to the end of the path of this URI. If the current path does
- * not end in a slash and the path to be appended does not begin with
- * a slash, a slash will be appended to the current path before the
- * new segment is added. Also, if the current path ends in a slash
- * and the new segment begins with a slash, the extra slash will be
- * removed before the new segment is appended.
- *
- * @param p_addToPath the new segment to be added to the current path
- *
- * @exception MalformedURIException if p_addToPath contains syntax
- * errors
- */
- public void appendPath(String p_addToPath)
- throws MalformedURIException {
- if (p_addToPath == null || p_addToPath.trim().length() == 0) {
- return;
- }
-
- if (!isURIString(p_addToPath)) {
- throw new MalformedURIException(
- "Path contains invalid character!");
- }
-
- if (m_path == null || m_path.trim().length() == 0) {
- if (p_addToPath.startsWith("/")) {
- m_path = p_addToPath;
- }
- else {
- m_path = "/" + p_addToPath;
- }
- }
- else if (m_path.endsWith("/")) {
- if (p_addToPath.startsWith("/")) {
- m_path = m_path.concat(p_addToPath.substring(1));
- }
- else {
- m_path = m_path.concat(p_addToPath);
- }
- }
- else {
- if (p_addToPath.startsWith("/")) {
- m_path = m_path.concat(p_addToPath);
- }
- else {
- m_path = m_path.concat("/" + p_addToPath);
- }
- }
- }
-
- /**
- * Set the query string for this URI. A non-null value is valid only
- * if this is an URI conforming to the generic URI syntax and
- * the path value is not null.
- *
- * @param p_queryString the query string for this URI
- *
- * @exception MalformedURIException if p_queryString is not null and this
- * URI does not conform to the generic
- * URI syntax or if the path is null
- */
- public void setQueryString(String p_queryString) throws MalformedURIException {
- if (p_queryString == null) {
- m_queryString = null;
- }
- else if (!isGenericURI()) {
- throw new MalformedURIException(
- "Query string can only be set for a generic URI!");
- }
- else if (getPath() == null) {
- throw new MalformedURIException(
- "Query string cannot be set when path is null!");
- }
- else if (!isURIString(p_queryString)) {
- throw new MalformedURIException(
- "Query string contains invalid character!");
- }
- else {
- m_queryString = p_queryString;
- }
- }
-
- /**
- * Set the fragment for this URI. A non-null value is valid only
- * if this is a URI conforming to the generic URI syntax and
- * the path value is not null.
- *
- * @param p_fragment the fragment for this URI
- *
- * @exception MalformedURIException if p_fragment is not null and this
- * URI does not conform to the generic
- * URI syntax or if the path is null
- */
- public void setFragment(String p_fragment) throws MalformedURIException {
- if (p_fragment == null) {
- m_fragment = null;
- }
- else if (!isGenericURI()) {
- throw new MalformedURIException(
- "Fragment can only be set for a generic URI!");
- }
- else if (getPath() == null) {
- throw new MalformedURIException(
- "Fragment cannot be set when path is null!");
- }
- else if (!isURIString(p_fragment)) {
- throw new MalformedURIException(
- "Fragment contains invalid character!");
- }
- else {
- m_fragment = p_fragment;
- }
- }
-
- /**
- * Determines if the passed-in Object is equivalent to this URI.
- *
- * @param p_test the Object to test for equality.
- *
- * @return true if p_test is a URI with all values equal to this
- * URI, false otherwise
- */
- public boolean equals(Object p_test) {
- if (p_test instanceof URI) {
- URI testURI = (URI) p_test;
- if (((m_scheme == null && testURI.m_scheme == null) ||
- (m_scheme != null && testURI.m_scheme != null &&
- m_scheme.equals(testURI.m_scheme))) &&
- ((m_userinfo == null && testURI.m_userinfo == null) ||
- (m_userinfo != null && testURI.m_userinfo != null &&
- m_userinfo.equals(testURI.m_userinfo))) &&
- ((m_host == null && testURI.m_host == null) ||
- (m_host != null && testURI.m_host != null &&
- m_host.equals(testURI.m_host))) &&
- m_port == testURI.m_port &&
- ((m_path == null && testURI.m_path == null) ||
- (m_path != null && testURI.m_path != null &&
- m_path.equals(testURI.m_path))) &&
- ((m_queryString == null && testURI.m_queryString == null) ||
- (m_queryString != null && testURI.m_queryString != null &&
- m_queryString.equals(testURI.m_queryString))) &&
- ((m_fragment == null && testURI.m_fragment == null) ||
- (m_fragment != null && testURI.m_fragment != null &&
- m_fragment.equals(testURI.m_fragment)))) {
- return true;
- }
- }
- return false;
- }
-
- /**
- * Get the URI as a string specification. See RFC 2396 Section 5.2.
- *
- * @return the URI string specification
- */
- public String toString() {
- StringBuffer uriSpecString = new StringBuffer();
-
- if (m_scheme != null) {
- uriSpecString.append(m_scheme);
- uriSpecString.append(':');
- }
- uriSpecString.append(getSchemeSpecificPart());
- return uriSpecString.toString();
- }
-
- /**
- * Get the indicator as to whether this URI uses the "generic URI"
- * syntax.
- *
- * @return true if this URI uses the "generic URI" syntax, false
- * otherwise
- */
- public boolean isGenericURI() {
- // presence of the host (whether valid or empty) means
- // double-slashes which means generic uri
- return (m_host != null);
- }
-
- /**
- * Determine whether a scheme conforms to the rules for a scheme name.
- * A scheme is conformant if it starts with an alphanumeric, and
- * contains only alphanumerics, '+','-' and '.'.
- *
- * @return true if the scheme is conformant, false otherwise
- */
- public static boolean isConformantSchemeName(String p_scheme) {
- if (p_scheme == null || p_scheme.trim().length() == 0) {
- return false;
- }
-
- if (!isAlpha(p_scheme.charAt(0))) {
- return false;
- }
-
- char testChar;
- int schemeLength = p_scheme.length();
- for (int i = 1; i < schemeLength; ++i) {
- testChar = p_scheme.charAt(i);
- if (!isSchemeCharacter(testChar)) {
- return false;
- }
- }
-
- return true;
- }
-
- /**
- * Determine whether a string is syntactically capable of representing
- * a valid IPv4 address, IPv6 reference or the domain name of a network host.
- * A valid IPv4 address consists of four decimal digit groups separated by a
- * '.'. Each group must consist of one to three digits. See RFC 2732 Section 3,
- * and RFC 2373 Section 2.2, for the definition of IPv6 references. A hostname
- * consists of domain labels (each of which must begin and end with an alphanumeric
- * but may contain '-') separated & by a '.'. See RFC 2396 Section 3.2.2.
- *
- * @return true if the string is a syntactically valid IPv4 address,
- * IPv6 reference or hostname
- */
- public static boolean isWellFormedAddress(String address) {
- if (address == null) {
- return false;
- }
-
- int addrLength = address.length();
- if (addrLength == 0) {
- return false;
- }
-
- // Check if the host is a valid IPv6reference.
- if (address.startsWith("[")) {
- return isWellFormedIPv6Reference(address);
- }
-
- // Cannot start with a '.', '-', or end with a '-'.
- if (address.startsWith(".") ||
- address.startsWith("-") ||
- address.endsWith("-")) {
- return false;
- }
-
- // rightmost domain label starting with digit indicates IP address
- // since top level domain label can only start with an alpha
- // see RFC 2396 Section 3.2.2
- int index = address.lastIndexOf('.');
- if (address.endsWith(".")) {
- index = address.substring(0, index).lastIndexOf('.');
- }
-
- if (index+1 < addrLength && isDigit(address.charAt(index+1))) {
- return isWellFormedIPv4Address(address);
- }
- else {
- // hostname = *( domainlabel "." ) toplabel [ "." ]
- // domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
- // toplabel = alpha | alpha *( alphanum | "-" ) alphanum
-
- // RFC 2396 states that hostnames take the form described in
- // RFC 1034 (Section 3) and RFC 1123 (Section 2.1). According
- // to RFC 1034, hostnames are limited to 255 characters.
- if (addrLength > 255) {
- return false;
- }
-
- // domain labels can contain alphanumerics and '-"
- // but must start and end with an alphanumeric
- char testChar;
- int labelCharCount = 0;
-
- for (int i = 0; i < addrLength; i++) {
- testChar = address.charAt(i);
- if (testChar == '.') {
- if (!isAlphanum(address.charAt(i-1))) {
- return false;
- }
- if (i+1 < addrLength && !isAlphanum(address.charAt(i+1))) {
- return false;
- }
- labelCharCount = 0;
- }
- else if (!isAlphanum(testChar) && testChar != '-') {
- return false;
- }
- // RFC 1034: Labels must be 63 characters or less.
- else if (++labelCharCount > 63) {
- return false;
- }
- }
- }
- return true;
- }
-
- /**
- * <p>Determines whether a string is an IPv4 address as defined by
- * RFC 2373, and under the further constraint that it must be a 32-bit
- * address. Though not expressed in the grammar, in order to satisfy
- * the 32-bit address constraint, each segment of the address cannot
- * be greater than 255 (8 bits of information).</p>
- *
- * <p><code>IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT</code></p>
- *
- * @return true if the string is a syntactically valid IPv4 address
- */
- public static boolean isWellFormedIPv4Address(String address) {
-
- int addrLength = address.length();
- char testChar;
- int numDots = 0;
- int numDigits = 0;
-
- // make sure that 1) we see only digits and dot separators, 2) that
- // any dot separator is preceded and followed by a digit and
- // 3) that we find 3 dots
- //
- // RFC 2732 amended RFC 2396 by replacing the definition
- // of IPv4address with the one defined by RFC 2373. - mrglavas
- //
- // IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
- //
- // One to three digits must be in each segment.
- for (int i = 0; i < addrLength; i++) {
- testChar = address.charAt(i);
- if (testChar == '.') {
- if ((i > 0 && !isDigit(address.charAt(i-1))) ||
- (i+1 < addrLength && !isDigit(address.charAt(i+1)))) {
- return false;
- }
- numDigits = 0;
- if (++numDots > 3) {
- return false;
- }
- }
- else if (!isDigit(testChar)) {
- return false;
- }
- // Check that that there are no more than three digits
- // in this segment.
- else if (++numDigits > 3) {
- return false;
- }
- // Check that this segment is not greater than 255.
- else if (numDigits == 3) {
- char first = address.charAt(i-2);
- char second = address.charAt(i-1);
- if (!(first < '2' ||
- (first == '2' &&
- (second < '5' ||
- (second == '5' && testChar <= '5'))))) {
- return false;
- }
- }
- }
- return (numDots == 3);
- }
-
- /**
- * <p>Determines whether a string is an IPv6 reference as defined
- * by RFC 2732, where IPv6address is defined in RFC 2373. The
- * IPv6 address is parsed according to Section 2.2 of RFC 2373,
- * with the additional constraint that the address be composed of
- * 128 bits of information.</p>
- *
- * <p><code>IPv6reference = "[" IPv6address "]"</code></p>
- *
- * <p>Note: The BNF expressed in RFC 2373 Appendix B does not
- * accurately describe section 2.2, and was in fact removed from
- * RFC 3513, the successor of RFC 2373.</p>
- *
- * @return true if the string is a syntactically valid IPv6 reference
- */
- public static boolean isWellFormedIPv6Reference(String address) {
-
- int addrLength = address.length();
- int index = 1;
- int end = addrLength-1;
-
- // Check if string is a potential match for IPv6reference.
- if (!(addrLength > 2 && address.charAt(0) == '['
- && address.charAt(end) == ']')) {
- return false;
- }
-
- // Counter for the number of 16-bit sections read in the address.
- int [] counter = new int[1];
-
- // Scan hex sequence before possible '::' or IPv4 address.
- index = scanHexSequence(address, index, end, counter);
- if (index == -1) {
- return false;
- }
- // Address must contain 128-bits of information.
- else if (index == end) {
- return (counter[0] == 8);
- }
-
- if (index+1 < end && address.charAt(index) == ':') {
- if (address.charAt(index+1) == ':') {
- // '::' represents at least one 16-bit group of zeros.
- if (++counter[0] > 8) {
- return false;
- }
- index += 2;
- // Trailing zeros will fill out the rest of the address.
- if (index == end) {
- return true;
- }
- }
- // If the second character wasn't ':', in order to be valid,
- // the remainder of the string must match IPv4Address,
- // and we must have read exactly 6 16-bit groups.
- else {
- return (counter[0] == 6) &&
- isWellFormedIPv4Address(address.substring(index+1, end));
- }
- }
- else {
- return false;
- }
-
- // 3. Scan hex sequence after '::'.
- int prevCount = counter[0];
- index = scanHexSequence(address, index, end, counter);
-
- // We've either reached the end of the string, the address ends in
- // an IPv4 address, or it is invalid. scanHexSequence has already
- // made sure that we have the right number of bits.
- return (index == end) ||
- (index != -1 && isWellFormedIPv4Address(
- address.substring((counter[0] > prevCount) ? index+1 : index, end)));
- }
-
- /**
- * Helper method for isWellFormedIPv6Reference which scans the
- * hex sequences of an IPv6 address. It returns the index of the
- * next character to scan in the address, or -1 if the string
- * cannot match a valid IPv6 address.
- *
- * @param address the string to be scanned
- * @param index the beginning index (inclusive)
- * @param end the ending index (exclusive)
- * @param counter a counter for the number of 16-bit sections read
- * in the address
- *
- * @return the index of the next character to scan, or -1 if the
- * string cannot match a valid IPv6 address
- */
- private static int scanHexSequence (String address, int index, int end, int [] counter) {
-
- char testChar;
- int numDigits = 0;
- int start = index;
-
- // Trying to match the following productions:
- // hexseq = hex4 *( ":" hex4)
- // hex4 = 1*4HEXDIG
- for (; index < end; ++index) {
- testChar = address.charAt(index);
- if (testChar == ':') {
- // IPv6 addresses are 128-bit, so there can be at most eight sections.
- if (numDigits > 0 && ++counter[0] > 8) {
- return -1;
- }
- // This could be '::'.
- if (numDigits == 0 || ((index+1 < end) && address.charAt(index+1) == ':')) {
- return index;
- }
- numDigits = 0;
- }
- // This might be invalid or an IPv4address. If it's potentially an IPv4address,
- // backup to just after the last valid character that matches hexseq.
- else if (!isHex(testChar)) {
- if (testChar == '.' && numDigits < 4 && numDigits > 0 && counter[0] <= 6) {
- int back = index - numDigits - 1;
- return (back >= start) ? back : (back+1);
- }
- return -1;
- }
- // There can be at most 4 hex digits per group.
- else if (++numDigits > 4) {
- return -1;
- }
- }
- return (numDigits > 0 && ++counter[0] <= 8) ? end : -1;
- }
-
-
- /**
- * Determine whether a char is a digit.
- *
- * @return true if the char is betweeen '0' and '9', false otherwise
- */
- private static boolean isDigit(char p_char) {
- return p_char >= '0' && p_char <= '9';
- }
-
- /**
- * Determine whether a character is a hexadecimal character.
- *
- * @return true if the char is betweeen '0' and '9', 'a' and 'f'
- * or 'A' and 'F', false otherwise
- */
- private static boolean isHex(char p_char) {
- return (p_char <= 'f' && (fgLookupTable[p_char] & ASCII_HEX_CHARACTERS) != 0);
- }
-
- /**
- * Determine whether a char is an alphabetic character: a-z or A-Z
- *
- * @return true if the char is alphabetic, false otherwise
- */
- private static boolean isAlpha(char p_char) {
- return ((p_char >= 'a' && p_char <= 'z') || (p_char >= 'A' && p_char <= 'Z' ));
- }
-
- /**
- * Determine whether a char is an alphanumeric: 0-9, a-z or A-Z
- *
- * @return true if the char is alphanumeric, false otherwise
- */
- private static boolean isAlphanum(char p_char) {
- return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_ALPHA_NUMERIC) != 0);
- }
-
- /**
- * Determine whether a character is a reserved character:
- * ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '[', or ']'
- *
- * @return true if the string contains any reserved characters
- */
- private static boolean isReservedCharacter(char p_char) {
- return (p_char <= ']' && (fgLookupTable[p_char] & RESERVED_CHARACTERS) != 0);
- }
-
- /**
- * Determine whether a char is an unreserved character.
- *
- * @return true if the char is unreserved, false otherwise
- */
- private static boolean isUnreservedCharacter(char p_char) {
- return (p_char <= '~' && (fgLookupTable[p_char] & MASK_UNRESERVED_MASK) != 0);
- }
-
- /**
- * Determine whether a char is a URI character (reserved or
- * unreserved, not including '%' for escaped octets).
- *
- * @return true if the char is a URI character, false otherwise
- */
- private static boolean isURICharacter (char p_char) {
- return (p_char <= '~' && (fgLookupTable[p_char] & MASK_URI_CHARACTER) != 0);
- }
-
- /**
- * Determine whether a char is a scheme character.
- *
- * @return true if the char is a scheme character, false otherwise
- */
- private static boolean isSchemeCharacter (char p_char) {
- return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_SCHEME_CHARACTER) != 0);
- }
-
- /**
- * Determine whether a char is a userinfo character.
- *
- * @return true if the char is a userinfo character, false otherwise
- */
- private static boolean isUserinfoCharacter (char p_char) {
- return (p_char <= 'z' && (fgLookupTable[p_char] & MASK_USERINFO_CHARACTER) != 0);
- }
-
- /**
- * Determine whether a char is a path character.
- *
- * @return true if the char is a path character, false otherwise
- */
- private static boolean isPathCharacter (char p_char) {
- return (p_char <= '~' && (fgLookupTable[p_char] & MASK_PATH_CHARACTER) != 0);
- }
-
-
- /**
- * Determine whether a given string contains only URI characters (also
- * called "uric" in RFC 2396). uric consist of all reserved
- * characters, unreserved characters and escaped characters.
- *
- * @return true if the string is comprised of uric, false otherwise
- */
- private static boolean isURIString(String p_uric) {
- if (p_uric == null) {
- return false;
- }
- int end = p_uric.length();
- char testChar = '\0';
- for (int i = 0; i < end; i++) {
- testChar = p_uric.charAt(i);
- if (testChar == '%') {
- if (i+2 >= end ||
- !isHex(p_uric.charAt(i+1)) ||
- !isHex(p_uric.charAt(i+2))) {
- return false;
- }
- else {
- i += 2;
- continue;
- }
- }
- if (isURICharacter(testChar)) {
- continue;
- }
- else {
- return false;
- }
- }
- return true;
- }
- }