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//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package com.signalfx.shaded.jetty.http;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.EnumSet;
import java.util.Objects;
import com.signalfx.shaded.jetty.util.ArrayTrie;
import com.signalfx.shaded.jetty.util.MultiMap;
import com.signalfx.shaded.jetty.util.Trie;
import com.signalfx.shaded.jetty.util.TypeUtil;
import com.signalfx.shaded.jetty.util.URIUtil;
import com.signalfx.shaded.jetty.util.UrlEncoded;
/**
* Http URI.
* Parse an HTTP URI from a string or byte array. Given a URI
* {@code http://user@host:port/path;param1/%2e/info;param2?query#fragment}
* this class will split it into the following optional elements:
* - {@link #getScheme()} - http:
* - {@link #getAuthority()} - //name@host:port
* - {@link #getHost()} - host
* - {@link #getPort()} - port
* - {@link #getPath()} - /path;param1/%2e/info;param2
* - {@link #getDecodedPath()} - /path/info
* - {@link #getParam()} - param2
* - {@link #getQuery()} - query
* - {@link #getFragment()} - fragment
*
*
* The path part of the URI is provided in both raw form ({@link #getPath()}) and
* decoded form ({@link #getDecodedPath}), which has: path parameters removed,
* percent encoded characters expanded and relative segments resolved. This approach
* is somewhat contrary to RFC3986
* which no longer defines path parameters (removed after
* RFC2396) and specifies
* that relative segment normalization should take place before percent encoded character
* expansion. A literal interpretation of the RFC can result in URI paths with ambiguities
* when viewed as strings. For example, a URI of {@code /foo%2f..%2fbar} is technically a single
* segment of "/foo/../bar", but could easily be misinterpreted as 3 segments resolving to "/bar"
* by a file system.
*
*
* Thus this class avoid and/or detects such ambiguities. Furthermore, by decoding characters and
* removing parameters before relative path normalization, ambiguous paths will be resolved in such
* a way to be non-standard-but-non-ambiguous to down stream interpretation of the decoded path string.
* The violations are recorded and available by API such as {@link #hasAmbiguousSegment()} so that requests
* containing them may be rejected in case the non-standard-but-non-ambiguous interpretations
* are not satisfactory for a given compliance configuration.
*
*
* Implementations that wish to process ambiguous URI paths must configure the compliance modes
* to accept them and then perform their own decoding of {@link #getPath()}.
*
*
* If there are multiple path parameters, only the last one is returned by {@link #getParam()}.
*
**/
public class HttpURI
{
private enum State
{
START,
HOST_OR_PATH,
SCHEME_OR_PATH,
HOST,
IPV6,
PORT,
PATH,
PARAM,
QUERY,
FRAGMENT,
ASTERISK
}
/**
* Violations of safe URI interpretations
*/
enum Violation
{
/**
* Ambiguous path segments e.g. {@code /foo/%2E%2E/bar}
*/
SEGMENT("Ambiguous path segments"),
/**
* Ambiguous path separator within a URI segment e.g. {@code /foo%2Fbar}
*/
SEPARATOR("Ambiguous path separator"),
/**
* Ambiguous path parameters within a URI segment e.g. {@code /foo/..;/bar} or {@code /foo/%2e%2e;param/bar}
*/
PARAM("Ambiguous path parameters"),
/**
* Ambiguous double encoding within a URI segment e.g. {@code /%2557EB-INF}
*/
ENCODING("Ambiguous double encoding"),
/**
* Ambiguous empty segments e.g. {@code /foo//bar}
*/
EMPTY("Ambiguous empty segments"),
/**
* Non standard UTF-16 encoding eg {@code /foo%u2192bar}.
*/
UTF16("Non standard UTF-16 encoding");
private final String _message;
Violation(String message)
{
_message = message;
}
String getMessage()
{
return _message;
}
}
private static final Trie __ambiguousSegments = new ArrayTrie<>();
static
{
__ambiguousSegments.put(".", Boolean.FALSE);
__ambiguousSegments.put("%2e", Boolean.TRUE);
__ambiguousSegments.put("%u002e", Boolean.TRUE);
__ambiguousSegments.put("..", Boolean.FALSE);
__ambiguousSegments.put(".%2e", Boolean.TRUE);
__ambiguousSegments.put(".%u002e", Boolean.TRUE);
__ambiguousSegments.put("%2e.", Boolean.TRUE);
__ambiguousSegments.put("%2e%2e", Boolean.TRUE);
__ambiguousSegments.put("%2e%u002e", Boolean.TRUE);
__ambiguousSegments.put("%u002e.", Boolean.TRUE);
__ambiguousSegments.put("%u002e%2e", Boolean.TRUE);
__ambiguousSegments.put("%u002e%u002e", Boolean.TRUE);
}
private String _scheme;
private String _user;
private String _host;
private int _port;
private String _path;
private String _param;
private String _query;
private String _fragment;
private String _uri;
private String _decodedPath;
private final EnumSet _violations = EnumSet.noneOf(Violation.class);
private boolean _emptySegment;
/**
* Construct a normalized URI.
* Port is not set if it is the default port.
*
* @param scheme the URI scheme
* @param host the URI hose
* @param port the URI port
* @param path the URI path
* @param param the URI param
* @param query the URI query
* @param fragment the URI fragment
* @return the normalized URI
*/
public static HttpURI createHttpURI(String scheme, String host, int port, String path, String param, String query, String fragment)
{
if (port == 80 && HttpScheme.HTTP.is(scheme))
port = 0;
if (port == 443 && HttpScheme.HTTPS.is(scheme))
port = 0;
return new HttpURI(scheme, host, port, path, param, query, fragment);
}
public HttpURI()
{
}
public HttpURI(String scheme, String host, int port, String path, String param, String query, String fragment)
{
_scheme = scheme;
_host = host;
_port = port;
if (path != null)
parse(State.PATH, path, 0, path.length());
if (param != null)
_param = param;
if (query != null)
_query = query;
if (fragment != null)
_fragment = fragment;
}
public HttpURI(HttpURI uri)
{
_scheme = uri._scheme;
_user = uri._user;
_host = uri._host;
_port = uri._port;
_path = uri._path;
_param = uri._param;
_query = uri._query;
_fragment = uri._fragment;
_uri = uri._uri;
_decodedPath = uri._decodedPath;
_violations.addAll(uri._violations);
_emptySegment = false;
}
public HttpURI(HttpURI schemeHostPort, HttpURI uri)
{
_scheme = schemeHostPort._scheme;
_user = schemeHostPort._user;
_host = schemeHostPort._host;
_port = schemeHostPort._port;
_path = uri._path;
_param = uri._param;
_query = uri._query;
_fragment = uri._fragment;
_uri = uri._uri;
_decodedPath = uri._decodedPath;
_violations.addAll(uri._violations);
_emptySegment = false;
}
public HttpURI(String uri)
{
_port = -1;
parse(State.START, uri, 0, uri.length());
}
public HttpURI(URI uri)
{
_uri = null;
_scheme = uri.getScheme();
_host = uri.getHost();
if (_host == null && uri.getRawSchemeSpecificPart().startsWith("//"))
_host = "";
_port = uri.getPort();
_user = uri.getUserInfo();
String path = uri.getRawPath();
if (path != null)
parse(State.PATH, path, 0, path.length());
_query = uri.getRawQuery();
_fragment = uri.getFragment();
}
public HttpURI(String scheme, String host, int port, String pathQuery)
{
_uri = null;
_scheme = scheme;
_host = host;
_port = port;
if (pathQuery != null)
parse(State.PATH, pathQuery, 0, pathQuery.length());
}
public void clear()
{
_uri = null;
_scheme = null;
_user = null;
_host = null;
_port = -1;
_path = null;
_param = null;
_query = null;
_fragment = null;
_decodedPath = null;
_emptySegment = false;
_violations.clear();
}
public void parse(String uri)
{
clear();
_uri = uri;
parse(State.START, uri, 0, uri.length());
}
/**
* Parse according to https://tools.ietf.org/html/rfc7230#section-5.3
*
* @param method the request method
* @param uri the request uri
*/
public void parseRequestTarget(String method, String uri)
{
clear();
_uri = uri;
if (HttpMethod.CONNECT.is(method))
parse(State.HOST, uri, 0, uri.length());
else
parse(uri.startsWith("/") ? State.PATH : State.START, uri, 0, uri.length());
}
@Deprecated
public void parseConnect(String uri)
{
clear();
_uri = uri;
_path = uri;
}
public void parse(String uri, int offset, int length)
{
clear();
int end = offset + length;
_uri = uri.substring(offset, end);
parse(State.START, uri, offset, end);
}
private void parse(State state, final String uri, final int offset, final int end)
{
int mark = offset; // the start of the current section being parsed
int pathMark = 0; // the start of the path section
int segment = 0; // the start of the current segment within the path
boolean encodedPath = false; // set to true if the path contains % encoded characters
boolean encodedUtf16 = false; // Is the current encoding for UTF16?
int encodedCharacters = 0; // partial state of parsing a % encoded character
int encodedValue = 0; // the partial encoded value
boolean dot = false; // set to true if the path contains . or .. segments
for (int i = offset; i < end; i++)
{
char c = uri.charAt(i);
switch (state)
{
case START:
{
switch (c)
{
case '/':
mark = i;
state = State.HOST_OR_PATH;
break;
case ';':
checkSegment(uri, segment, i, true);
mark = i + 1;
state = State.PARAM;
break;
case '?':
// assume empty path (if seen at start)
checkSegment(uri, segment, i, false);
_path = "";
mark = i + 1;
state = State.QUERY;
break;
case '#':
// assume empty path (if seen at start)
checkSegment(uri, segment, i, false);
_path = "";
mark = i + 1;
state = State.FRAGMENT;
break;
case '*':
_path = "*";
state = State.ASTERISK;
break;
case '%':
encodedPath = true;
encodedCharacters = 2;
encodedValue = 0;
mark = pathMark = segment = i;
state = State.PATH;
break;
case '.':
dot = true;
pathMark = segment = i;
state = State.PATH;
break;
default:
mark = i;
if (_scheme == null)
state = State.SCHEME_OR_PATH;
else
{
pathMark = segment = i;
state = State.PATH;
}
break;
}
continue;
}
case SCHEME_OR_PATH:
{
switch (c)
{
case ':':
// must have been a scheme
_scheme = uri.substring(mark, i);
// Start again with scheme set
state = State.START;
break;
case '/':
// must have been in a path and still are
segment = i + 1;
state = State.PATH;
break;
case ';':
// must have been in a path
mark = i + 1;
state = State.PARAM;
break;
case '?':
// must have been in a path
_path = uri.substring(mark, i);
mark = i + 1;
state = State.QUERY;
break;
case '%':
// must have been in an encoded path
encodedPath = true;
encodedCharacters = 2;
encodedValue = 0;
state = State.PATH;
break;
case '#':
// must have been in a path
_path = uri.substring(mark, i);
state = State.FRAGMENT;
break;
default:
break;
}
continue;
}
case HOST_OR_PATH:
{
switch (c)
{
case '/':
_host = "";
mark = i + 1;
state = State.HOST;
break;
case '%':
case '@':
case ';':
case '?':
case '#':
case '.':
// was a path, look again
i--;
pathMark = mark;
segment = mark + 1;
state = State.PATH;
break;
default:
// it is a path
pathMark = mark;
segment = mark + 1;
state = State.PATH;
}
continue;
}
case HOST:
{
switch (c)
{
case '/':
_host = uri.substring(mark, i);
pathMark = mark = i;
segment = mark + 1;
state = State.PATH;
break;
case ':':
if (i > mark)
_host = uri.substring(mark, i);
mark = i + 1;
state = State.PORT;
break;
case '@':
if (_user != null)
throw new IllegalArgumentException("Bad authority");
_user = uri.substring(mark, i);
mark = i + 1;
break;
case '[':
state = State.IPV6;
break;
default:
break;
}
break;
}
case IPV6:
{
switch (c)
{
case '/':
throw new IllegalArgumentException("No closing ']' for ipv6 in " + uri);
case ']':
c = uri.charAt(++i);
_host = uri.substring(mark, i);
if (c == ':')
{
mark = i + 1;
state = State.PORT;
}
else
{
pathMark = mark = i;
state = State.PATH;
}
break;
default:
break;
}
break;
}
case PORT:
{
if (c == '@')
{
if (_user != null)
throw new IllegalArgumentException("Bad authority");
// It wasn't a port, but a password!
_user = _host + ":" + uri.substring(mark, i);
mark = i + 1;
state = State.HOST;
}
else if (c == '/')
{
_port = TypeUtil.parseInt(uri, mark, i - mark, 10);
pathMark = mark = i;
segment = i + 1;
state = State.PATH;
}
break;
}
case PATH:
{
if (encodedCharacters > 0)
{
if (encodedCharacters == 2 && c == 'u' && !encodedUtf16)
{
_violations.add(Violation.UTF16);
encodedUtf16 = true;
encodedCharacters = 4;
continue;
}
encodedValue = (encodedValue << 4) + TypeUtil.convertHexDigit(c);
if (--encodedCharacters == 0)
{
switch (encodedValue)
{
case 0:
// Byte 0 cannot be present in a UTF-8 sequence in any position
// other than as the NUL ASCII byte which we do not wish to allow.
throw new IllegalArgumentException("Illegal character in path");
case '/':
_violations.add(Violation.SEPARATOR);
break;
case '%':
_violations.add(Violation.ENCODING);
break;
default:
break;
}
}
}
else
{
switch (c)
{
case ';':
checkSegment(uri, segment, i, true);
mark = i + 1;
state = State.PARAM;
break;
case '?':
checkSegment(uri, segment, i, false);
_path = uri.substring(pathMark, i);
mark = i + 1;
state = State.QUERY;
break;
case '#':
checkSegment(uri, segment, i, false);
_path = uri.substring(pathMark, i);
mark = i + 1;
state = State.FRAGMENT;
break;
case '/':
// There is no leading segment when parsing only a path that starts with slash.
if (i != 0)
checkSegment(uri, segment, i, false);
segment = i + 1;
break;
case '.':
dot |= segment == i;
break;
case '%':
encodedPath = true;
encodedUtf16 = false;
encodedCharacters = 2;
encodedValue = 0;
break;
default:
break;
}
}
break;
}
case PARAM:
{
switch (c)
{
case '?':
_path = uri.substring(pathMark, i);
_param = uri.substring(mark, i);
mark = i + 1;
state = State.QUERY;
break;
case '#':
_path = uri.substring(pathMark, i);
_param = uri.substring(mark, i);
mark = i + 1;
state = State.FRAGMENT;
break;
case '/':
encodedPath = true;
segment = i + 1;
state = State.PATH;
break;
case ';':
// multiple parameters
mark = i + 1;
break;
default:
break;
}
break;
}
case QUERY:
{
if (c == '#')
{
_query = uri.substring(mark, i);
mark = i + 1;
state = State.FRAGMENT;
}
break;
}
case ASTERISK:
{
throw new IllegalArgumentException("Bad character '*'");
}
case FRAGMENT:
{
_fragment = uri.substring(mark, end);
i = end;
break;
}
default:
{
throw new IllegalStateException(state.toString());
}
}
}
switch (state)
{
case START:
_path = "";
checkSegment(uri, segment, end, false);
break;
case ASTERISK:
break;
case SCHEME_OR_PATH:
case HOST_OR_PATH:
_path = uri.substring(mark, end);
break;
case HOST:
if (end > mark)
_host = uri.substring(mark, end);
break;
case IPV6:
throw new IllegalArgumentException("No closing ']' for ipv6 in " + uri);
case PORT:
_port = TypeUtil.parseInt(uri, mark, end - mark, 10);
break;
case PARAM:
_path = uri.substring(pathMark, end);
_param = uri.substring(mark, end);
break;
case PATH:
checkSegment(uri, segment, end, false);
_path = uri.substring(pathMark, end);
break;
case QUERY:
_query = uri.substring(mark, end);
break;
case FRAGMENT:
_fragment = uri.substring(mark, end);
break;
default:
throw new IllegalStateException(state.toString());
}
if (!encodedPath && !dot)
{
if (_param == null)
_decodedPath = _path;
else
_decodedPath = _path.substring(0, _path.length() - _param.length() - 1);
}
else if (_path != null)
{
// The RFC requires this to be canonical before decoding, but this can leave dot segments and dot dot segments
// which are not canonicalized and could be used in an attempt to bypass security checks.
String decodedNonCanonical = URIUtil.decodePath(_path);
_decodedPath = URIUtil.canonicalPath(decodedNonCanonical);
if (_decodedPath == null)
throw new IllegalArgumentException("Bad URI");
}
}
/**
* Check for ambiguous path segments.
*
* An ambiguous path segment is one that is perhaps technically legal, but is considered undesirable to handle
* due to possible ambiguity. Examples include segments like '..;', '%2e', '%2e%2e' etc.
*
* @param uri The URI string
* @param segment The inclusive starting index of the segment (excluding any '/')
* @param end The exclusive end index of the segment
*/
private void checkSegment(String uri, int segment, int end, boolean param)
{
// This method is called once for every segment parsed.
// A URI like "/foo/" has two segments: "foo" and an empty segment.
// Empty segments are only ambiguous if they are not the last segment
// So if this method is called for any segment and we have previously
// seen an empty segment, then it was ambiguous.
if (_emptySegment)
_violations.add(Violation.EMPTY);
if (end == segment)
{
// Empty segments are not ambiguous if followed by a '#', '?' or end of string.
if (end >= uri.length() || ("#?".indexOf(uri.charAt(end)) >= 0))
return;
// If this empty segment is the first segment then it is ambiguous.
if (segment == 0)
{
_violations.add(Violation.EMPTY);
return;
}
// Otherwise remember we have seen an empty segment, which is check if we see a subsequent segment.
if (!_emptySegment)
{
_emptySegment = true;
return;
}
}
// Look for segment in the ambiguous segment index.
Boolean ambiguous = __ambiguousSegments.get(uri, segment, end - segment);
if (ambiguous != null)
{
// Is the segment intrinsically ambiguous
if (Boolean.TRUE.equals(ambiguous))
_violations.add(Violation.SEGMENT);
// Is the segment ambiguous with a parameter?
if (param)
_violations.add(Violation.PARAM);
}
}
/**
* @return True if the URI has a possibly ambiguous segment like '..;' or '%2e%2e'
*/
public boolean hasAmbiguousSegment()
{
return _violations.contains(Violation.SEGMENT);
}
/**
* @return True if the URI empty segment that is ambiguous like '//' or '/;param/'.
*/
public boolean hasAmbiguousEmptySegment()
{
return _violations.contains(Violation.EMPTY);
}
/**
* @return True if the URI has a possibly ambiguous separator of %2f
*/
public boolean hasAmbiguousSeparator()
{
return _violations.contains(Violation.SEPARATOR);
}
/**
* @return True if the URI has a possibly ambiguous path parameter like '..;'
*/
public boolean hasAmbiguousParameter()
{
return _violations.contains(Violation.PARAM);
}
/**
* @return True if the URI has an encoded '%' character.
*/
public boolean hasAmbiguousEncoding()
{
return _violations.contains(Violation.ENCODING);
}
/**
* @return True if the URI has either an {@link #hasAmbiguousSegment()} or {@link #hasAmbiguousEmptySegment()}
* or {@link #hasAmbiguousSeparator()} or {@link #hasAmbiguousParameter()}
*/
public boolean isAmbiguous()
{
return !_violations.isEmpty() && !(_violations.size() == 1 && _violations.contains(Violation.UTF16));
}
/**
* @return True if the URI has any Violations.
*/
public boolean hasViolations()
{
return !_violations.isEmpty();
}
boolean hasViolation(Violation violation)
{
return _violations.contains(violation);
}
/**
* @return True if the URI encodes UTF-16 characters with '%u'.
*/
public boolean hasUtf16Encoding()
{
return _violations.contains(Violation.UTF16);
}
public String getScheme()
{
return _scheme;
}
public String getHost()
{
// Return null for empty host to retain compatibility with java.net.URI
if (_host != null && _host.isEmpty())
return null;
return _host;
}
public int getPort()
{
return _port;
}
/**
* The parsed Path.
*
* @return the path as parsed on valid URI. null for invalid URI.
*/
public String getPath()
{
return _path;
}
/**
* @return The decoded canonical path.
* @see URIUtil#canonicalPath(String)
*/
public String getDecodedPath()
{
return _decodedPath;
}
/**
* Get a URI path parameter. Multiple and in segment parameters are ignored and only
* the last trailing parameter is returned.
* @return The last path parameter or null
*/
public String getParam()
{
return _param;
}
public void setParam(String param)
{
if (!Objects.equals(_param, param))
{
if (_param != null && _path.endsWith(";" + _param))
_path = _path.substring(0, _path.length() - 1 - _param.length());
_param = param;
if (_param != null)
_path = (_path == null ? "" : _path) + ";" + _param;
_uri = null;
}
}
public String getQuery()
{
return _query;
}
public boolean hasQuery()
{
return _query != null && !_query.isEmpty();
}
public String getFragment()
{
return _fragment;
}
public void decodeQueryTo(MultiMap parameters)
{
if (_query == null)
return;
UrlEncoded.decodeUtf8To(_query, parameters);
}
public void decodeQueryTo(MultiMap parameters, String encoding) throws UnsupportedEncodingException
{
decodeQueryTo(parameters, Charset.forName(encoding));
}
public void decodeQueryTo(MultiMap parameters, Charset encoding) throws UnsupportedEncodingException
{
if (_query == null)
return;
if (encoding == null || StandardCharsets.UTF_8.equals(encoding))
UrlEncoded.decodeUtf8To(_query, parameters);
else
UrlEncoded.decodeTo(_query, parameters, encoding);
}
public boolean isAbsolute()
{
return _scheme != null && !_scheme.isEmpty();
}
@Override
public String toString()
{
if (_uri == null)
{
StringBuilder out = new StringBuilder();
if (_scheme != null)
out.append(_scheme).append(':');
if (_host != null)
{
out.append("//");
if (_user != null)
out.append(_user).append('@');
out.append(_host);
}
if (_port > 0)
out.append(':').append(_port);
if (_path != null)
out.append(_path);
if (_query != null)
out.append('?').append(_query);
if (_fragment != null)
out.append('#').append(_fragment);
if (out.length() > 0)
_uri = out.toString();
else
_uri = "";
}
return _uri;
}
@Override
public boolean equals(Object o)
{
if (o == this)
return true;
if (!(o instanceof HttpURI))
return false;
return toString().equals(o.toString());
}
@Override
public int hashCode()
{
return toString().hashCode();
}
public void setScheme(String scheme)
{
_scheme = scheme;
_uri = null;
}
/**
* @param host the host
* @param port the port
*/
public void setAuthority(String host, int port)
{
if (host != null && !isPathValidForAuthority(_path))
throw new IllegalArgumentException("Relative path with authority");
_host = host;
_port = port;
_uri = null;
}
private boolean isPathValidForAuthority(String path)
{
if (path == null)
return true;
if (path.isEmpty() || "*".equals(path))
return true;
return path.startsWith("/");
}
/**
* @param path the path
*/
public void setPath(String path)
{
if (hasAuthority() && !isPathValidForAuthority(path))
throw new IllegalArgumentException("Relative path with authority");
_uri = null;
_path = null;
if (path != null)
parse(State.PATH, path, 0, path.length());
}
public void setPathQuery(String pathQuery)
{
if (hasAuthority() && !isPathValidForAuthority(pathQuery))
throw new IllegalArgumentException("Relative path with authority");
_uri = null;
_path = null;
_decodedPath = null;
_param = null;
_fragment = null;
/*
* The query is not cleared here and old values may be retained if there is no query in
* the pathQuery. This has been fixed in 10, but left as is here to preserve behaviour in 9.
*/
if (pathQuery != null)
parse(State.PATH, pathQuery, 0, pathQuery.length());
}
private boolean hasAuthority()
{
return _host != null;
}
public void setQuery(String query)
{
_query = query;
_uri = null;
}
public URI toURI() throws URISyntaxException
{
return new URI(_scheme, null, _host, _port, _path, _query == null ? null : UrlEncoded.decodeString(_query), _fragment);
}
public String getPathQuery()
{
if (_query == null)
return _path;
return _path + "?" + _query;
}
public String getAuthority()
{
if (_port > 0)
return _host + ":" + _port;
return _host;
}
public String getUser()
{
return _user;
}
}
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