org.enhydra.apache.xerces.utils.URI Maven / Gradle / Ivy
/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999,2001 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 [email protected].
*
* 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
* Parsing of a URI specification is done according to the URI
* syntax described in RFC 2396
* . Every 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.
*
* 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.
*
* 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 1.1.1.1 2003/03/10 16:34:40 taweili 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 MalformedURIException with no specified
* detail message.
******************************************************************/
public MalformedURIException() {
super();
}
/*****************************************************************
* Constructs a MalformedURIException with the
* specified detail message.
*
* @param p_msg the detail message.
******************************************************************/
public MalformedURIException(String p_msg) {
super(p_msg);
}
}
/** reserved characters */
private static final String RESERVED_CHARACTERS = ";/?:@&=+$,";
/** URI punctuation mark characters - these, combined with
alphanumerics, constitute the "unreserved" characters */
private static final String MARK_CHARACTERS = "-_.!~*'() ";
/** scheme can be composed of alphanumerics and these characters */
private static final String SCHEME_CHARACTERS = "+-.";
/** userinfo can be composed of unreserved, escaped and these
characters */
private static final String USERINFO_CHARACTERS = ";:&=+$,";
/** 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 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 or IPv4 address 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 or IPv4 address 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_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 {
if (p_base == null &&
(p_uriSpec == null || p_uriSpec.trim().length() == 0)) {
throw new MalformedURIException(
"Cannot initialize URI with empty parameters.");
}
// just make a copy of the base if spec is empty
if (p_uriSpec == null || p_uriSpec.trim().length() == 0) {
initialize(p_base);
return;
}
String uriSpec = p_uriSpec.trim();
int uriSpecLen = uriSpec.length();
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(':');
int slashIdx = uriSpec.indexOf('/');
int queryIdx = uriSpec.indexOf('?');
int fragmentIdx = uriSpec.indexOf('#');
if ((colonIdx < 2) ||
(colonIdx > slashIdx && slashIdx != -1) ||
(colonIdx > queryIdx && queryIdx != -1) ||
(colonIdx > fragmentIdx && fragmentIdx != -1)) {
// A standalone base is a valid URI according to spec
if (p_base == null && fragmentIdx != 0) {
throw new MalformedURIException("No scheme found in URI.");
}
}
else {
initializeScheme(uriSpec);
index = m_scheme.length()+1;
}
// two slashes means generic URI syntax, so we get the authority
if (((index+1) < uriSpecLen) &&
(uriSpec.substring(index).startsWith("//"))) {
index += 2;
int startPos = index;
// get authority - everything up to path, query or fragment
char testChar = '\0';
while (index < uriSpecLen) {
testChar = uriSpec.charAt(index);
if (testChar == '/' || testChar == '?' || testChar == '#') {
break;
}
index++;
}
// if we found authority, parse it out, otherwise we set the
// host to empty string
if (index > startPos) {
initializeAuthority(uriSpec.substring(startPos, index));
}
else {
m_host = "";
}
}
initializePath(uriSpec.substring(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 which
// identified this as a bug in the RFC
if (m_path.length() == 0 && m_scheme == null &&
m_host == null) {
m_scheme = p_base.getScheme();
m_userinfo = p_base.getUserinfo();
m_host = p_base.getHost();
m_port = p_base.getPort();
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_userinfo = p_base.getUserinfo();
m_host = p_base.getHost();
m_port = p_base.getPort();
}
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 = new String();
String basePath = p_base.getPath();
// 6a - get all but the last segment of the base URI path
if (basePath != null) {
int lastSlash = basePath.lastIndexOf('/');
if (lastSlash != -1) {
path = basePath.substring(0, lastSlash+1);
}
}
// 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 "/../" where "" is a complete
// path segment not equal to ".."
index = 1;
int segIndex = -1;
while ((index = path.indexOf("/../", index)) > 0) {
segIndex = path.lastIndexOf('/', index-1);
if (segIndex != -1 && !path.substring(segIndex+1, index).equals("..")) {
path = path.substring(0, segIndex).concat(path.substring(index+3));
index = segIndex;
} else {
index += 4;
}
}
// 6f - remove ending "/.." where "" is a
// complete path segment
if (path.endsWith("/..")) {
index = path.length()-3;
segIndex = path.lastIndexOf('/', index-1);
if (segIndex != -1 && !path.substring(segIndex+1, index).equals("..")) {
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 (userinfo, host and port) for this
* URI from a URI string spec.
*
* @param p_uriSpec the URI specification (cannot be null)
*
* @exception MalformedURIException if p_uriSpec violates syntax rules
*/
private void initializeAuthority(String p_uriSpec)
throws MalformedURIException {
int index = 0;
int start = 0;
int end = p_uriSpec.length();
char testChar = '\0';
String userinfo = null;
// userinfo is everything up @
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 ':'
String host = null;
start = index;
while (index < end) {
testChar = p_uriSpec.charAt(index);
if (testChar == ':') {
break;
}
index++;
}
host = p_uriSpec.substring(start, index);
int port = -1;
if (host.length() > 0) {
// port
if (testChar == ':') {
index++;
start = index;
while (index < end) {
index++;
}
String portStr = p_uriSpec.substring(start, index);
if (portStr.length() > 0) {
for (int i = 0; i < portStr.length(); i++) {
if (!isDigit(portStr.charAt(i))) {
throw new MalformedURIException(
portStr +
" is invalid. Port should only contain digits!");
}
}
try {
port = Integer.parseInt(portStr);
}
catch (NumberFormatException nfe) {
// can't happen
}
}
}
}
setHost(host);
setPort(port);
setUserinfo(userinfo);
}
/**
* Initialize the path for this URI from a URI string spec.
*
* @param p_uriSpec the URI specification (cannot be null)
*
* @exception MalformedURIException if p_uriSpec violates syntax rules
*/
private void initializePath(String p_uriSpec)
throws MalformedURIException {
if (p_uriSpec == null) {
throw new MalformedURIException(
"Cannot initialize path from null string!");
}
int index = 0;
int start = 0;
int end = p_uriSpec.length();
char testChar = '\0';
// path - everything up to query string or fragment
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(
"Path contains invalid escape sequence!");
}
}
else if (!isReservedCharacter(testChar) &&
!isUnreservedCharacter(testChar)) {
throw new MalformedURIException(
"Path 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!");
}
}
else if (!isReservedCharacter(testChar) &&
!isUnreservedCharacter(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!");
}
}
else if (!isReservedCharacter(testChar) &&
!isUnreservedCharacter(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_userinfo != null || m_host != null || m_port != -1) {
schemespec.append("//");
}
if (m_userinfo != null) {
schemespec.append(m_userinfo);
schemespec.append('@');
}
if (m_host != null) {
schemespec.append(m_host);
}
if (m_port != -1) {
schemespec.append(':');
schemespec.append(m_port);
}
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 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;
}
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 (!isUnreservedCharacter(testChar) &&
USERINFO_CHARACTERS.indexOf(testChar) == -1) {
throw new MalformedURIException(
"Userinfo contains invalid character:"+testChar);
}
index++;
}
}
m_userinfo = p_userinfo;
}
/**
* 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.
*
* @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.trim().length() == 0) {
m_host = p_host;
m_userinfo = null;
m_port = -1;
}
else if (!isWellFormedAddress(p_host)) {
throw new MalformedURIException("Host is not a well formed address!");
}
m_host = p_host;
}
/**
* 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;
}
/**
* 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);
}
}
/**
* 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;
for (int i = 1; i < p_scheme.length(); i++) {
testChar = p_scheme.charAt(i);
if (!isAlphanum(testChar) &&
SCHEME_CHARACTERS.indexOf(testChar) == -1) {
return false;
}
}
return true;
}
/**
* Determine whether a string is syntactically capable of representing
* a valid IPv4 address or the domain name of a network host. A valid
* IPv4 address consists of four decimal digit groups separated by a
* '.'. 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
* or hostname
*/
public static boolean isWellFormedAddress(String p_address) {
if (p_address == null) {
return false;
}
String address = p_address.trim();
int addrLength = address.length();
if (addrLength == 0 || addrLength > 255) {
return false;
}
if (address.startsWith(".") || address.startsWith("-")) {
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(p_address.charAt(index+1))) {
char testChar;
int numDots = 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
for (int i = 0; i < addrLength; i++) {
testChar = address.charAt(i);
if (testChar == '.') {
if (!isDigit(address.charAt(i-1)) ||
(i+1 < addrLength && !isDigit(address.charAt(i+1)))) {
return false;
}
numDots++;
}
else if (!isDigit(testChar)) {
return false;
}
}
if (numDots != 3) {
return false;
}
}
else {
// domain labels can contain alphanumerics and '-"
// but must start and end with an alphanumeric
char testChar;
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;
}
}
else if (!isAlphanum(testChar) && testChar != '-') {
return false;
}
}
}
return true;
}
/**
* 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 (isDigit(p_char) ||
(p_char >= 'a' && p_char <= 'f') ||
(p_char >= 'A' && p_char <= 'F'));
}
/**
* 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 (isAlpha(p_char) || isDigit(p_char));
}
/**
* 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 RESERVED_CHARACTERS.indexOf(p_char) != -1;
}
/**
* 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 (isAlphanum(p_char) ||
MARK_CHARACTERS.indexOf(p_char) != -1);
}
/**
* 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 (isReservedCharacter(testChar) ||
isUnreservedCharacter(testChar)) {
continue;
}
else {
return false;
}
}
return true;
}
}