org.apache.xml.utils.URI Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: URI.java 468655 2006-10-28 07:12:06Z minchau $
*/
package org.apache.xml.utils;
import java.io.IOException;
import java.io.Serializable;
import org.apache.xml.res.XMLErrorResources;
import org.apache.xml.res.XMLMessages;
/**
* 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.
*
* 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.
*
*
*/
public class URI implements Serializable
{
static final long serialVersionUID = 7096266377907081897L;
/**
* 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.
* @serial */
private String m_scheme = null;
/** If specified, stores the userinfo for this URI; otherwise null.
* @serial */
private String m_userinfo = null;
/** If specified, stores the host for this URI; otherwise null.
* @serial */
private String m_host = null;
/** If specified, stores the port for this URI; otherwise -1.
* @serial */
private int m_port = -1;
/** If specified, stores the path for this URI; otherwise null.
* @serial */
private String m_path = null;
/**
* If specified, stores the query string for this URI; otherwise
* null.
* @serial
*/
private String m_queryString = null;
/** If specified, stores the fragment for this URI; otherwise null.
* @serial */
private String m_fragment = null;
/** Indicate whether in DEBUG mode */
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)
*
* @throws 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)
*
* @throws 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)
*
* @throws 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)
*
* @throws 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)
*
* @throws 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(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_REQUIRED, null)); //"Scheme is required!");
}
if (p_host == null)
{
if (p_userinfo != null)
{
throw new MalformedURIException(
XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_USERINFO_IF_NO_HOST, null)); //"Userinfo may not be specified if host is not specified!");
}
if (p_port != -1)
{
throw new MalformedURIException(
XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_PORT_IF_NO_HOST, null)); //"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(
XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_QUERY_STRING_IN_PATH, null)); //"Query string cannot be specified in path and query string!");
}
if (p_path.indexOf('#') != -1 && p_fragment != null)
{
throw new MalformedURIException(
XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_FRAGMENT_STRING_IN_PATH, null)); //"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)
*
* @throws 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(
XMLMessages.createXMLMessage(XMLErrorResources.ER_CANNOT_INIT_URI_EMPTY_PARMS, null)); //"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
int colonIndex = uriSpec.indexOf(':');
if (colonIndex < 0)
{
if (p_base == null)
{
throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_SCHEME_IN_URI, new Object[]{uriSpec})); //"No scheme found in URI: "+uriSpec);
}
}
else
{
initializeScheme(uriSpec);
uriSpec = uriSpec.substring(colonIndex+1);
// This is a fix for XALANJ-2059.
if(m_scheme != null && p_base != null)
{
// a) If starts with a slash (/), it means is absolute
// and p_base can be ignored.
// For example,
// uriSpec = file:/myDIR/myXSLFile.xsl
// p_base = file:/myWork/
//
// Here, uriSpec has absolute path after scheme file and :
// Hence p_base can be ignored.
//
// b) Similarily, according to RFC 2396, uri is resolved for relative to
// if scheme in is same as scheme in , else p_base can be ignored.
//
// c) if is not hierarchical, it can be ignored.
//
if(uriSpec.startsWith("/") || !m_scheme.equals(p_base.m_scheme) || !p_base.getSchemeSpecificPart().startsWith("/"))
{
p_base = null;
}
}
// Fix for XALANJ-2059
uriSpecLen = uriSpec.length();
}
// two slashes means generic URI syntax, so we get the authority
if (uriSpec.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();
}
// 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;
String tempString = null;
while ((index = path.indexOf("/../")) > 0)
{
tempString = path.substring(0, path.indexOf("/../"));
segIndex = tempString.lastIndexOf('/');
if (segIndex != -1)
{
if (!tempString.substring(segIndex++).equals(".."))
{
path = path.substring(0, segIndex).concat(path.substring(index
+ 4));
}
}
}
// 6f - remove ending "/.." where "" 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)
*
* @throws 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(XMLMessages.createXMLMessage(XMLErrorResources.ER_NO_SCHEME_INURI, null)); //"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)
*
* @throws 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)
*
* @throws 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(
XMLMessages.createXMLMessage(XMLErrorResources.ER_PATH_CONTAINS_INVALID_ESCAPE_SEQUENCE, null)); //"Path contains invalid escape sequence!");
}
}
else if (!isReservedCharacter(testChar)
&&!isUnreservedCharacter(testChar))
{
if ('\\' != testChar)
throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_PATH_INVALID_CHAR, new Object[]{String.valueOf(testChar)})); //"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)
*
* @throws 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(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_FROM_NULL_STRING, null)); //"Cannot set scheme from null string!");
}
if (!isConformantSchemeName(p_scheme))
{
throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_SCHEME_NOT_CONFORMANT, null)); //"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
*
* @throws 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
*
* @throws 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(XMLMessages.createXMLMessage(XMLErrorResources.ER_HOST_ADDRESS_NOT_WELLFORMED, null)); //"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
*
* @throws 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(
XMLMessages.createXMLMessage(XMLErrorResources.ER_PORT_WHEN_HOST_NULL, null)); //"Port cannot be set when host is null!");
}
}
else if (p_port != -1)
{
throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_INVALID_PORT, null)); //"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)
*
* @throws 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
*
* @throws 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(XMLMessages.createXMLMessage(XMLErrorResources.ER_PATH_INVALID_CHAR, new Object[]{p_addToPath})); //"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
*
* @throws 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
*
* @throws 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(
XMLMessages.createXMLMessage(XMLErrorResources.ER_FRAG_FOR_GENERIC_URI, null)); //"Fragment can only be set for a generic URI!");
}
else if (getPath() == null)
{
throw new MalformedURIException(
XMLMessages.createXMLMessage(XMLErrorResources.ER_FRAG_WHEN_PATH_NULL, null)); //"Fragment cannot be set when path is null!");
}
else if (!isURIString(p_fragment))
{
throw new MalformedURIException(XMLMessages.createXMLMessage(XMLErrorResources.ER_FRAG_INVALID_CHAR, null)); //"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 '.'.
*
*
* @param p_scheme The sheme name to check
* @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.
*
*
* @param p_address The address string to check
* @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.
*
*
* @param p_char the character to check
* @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.
*
*
* @param p_char the character to check
* @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
*
*
* @param p_char the character to check
* @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
*
*
* @param p_char the character to check
* @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 ','
*
*
* @param p_char the character to check
* @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.
*
*
* @param p_char the character to check
* @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.
*
*
* @param p_uric URI string
* @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;
}
}