/
HttpURI.java
904 lines (837 loc) · 28 KB
/
HttpURI.java
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//
// ========================================================================
// Copyright (c) 1995-2021 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 org.eclipse.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 org.eclipse.jetty.util.ArrayTrie;
import org.eclipse.jetty.util.MultiMap;
import org.eclipse.jetty.util.Trie;
import org.eclipse.jetty.util.TypeUtil;
import org.eclipse.jetty.util.URIUtil;
import org.eclipse.jetty.util.UrlEncoded;
/**
* Http URI.
* Parse an HTTP URI from a string or byte array. Given a URI
* <code>http://user@host:port/path/info;param?query#fragment</code>
* this class will split it into the following undecoded optional elements:<ul>
* <li>{@link #getScheme()} - http:</li>
* <li>{@link #getAuthority()} - //name@host:port</li>
* <li>{@link #getHost()} - host</li>
* <li>{@link #getPort()} - port</li>
* <li>{@link #getPath()} - /path/info</li>
* <li>{@link #getParam()} - param</li>
* <li>{@link #getQuery()} - query</li>
* <li>{@link #getFragment()} - fragment</li>
* </ul>
*
* <p>Any parameters will be returned from {@link #getPath()}, but are excluded from the
* return value of {@link #getDecodedPath()}. If there are multiple parameters, the
* {@link #getParam()} method returns only the last one.
*/
public class HttpURI
{
private enum State
{
START,
HOST_OR_PATH,
SCHEME_OR_PATH,
HOST,
IPV6,
PORT,
PATH,
PARAM,
QUERY,
FRAGMENT,
ASTERISK
}
enum Ambiguous
{
SEGMENT,
SEPARATOR,
PARAM
}
/**
* The concept of URI path parameters was originally specified in
* <a href="https://tools.ietf.org/html/rfc2396#section-3.3">RFC2396</a>, but that was
* obsoleted by
* <a href="https://tools.ietf.org/html/rfc3986#section-3.3">RFC3986</a> which removed
* a normative definition of path parameters. Specifically it excluded them from the
* <a href="https://tools.ietf.org/html/rfc3986#section-5.2.4">Remove Dot Segments</a>
* algorithm. This results in some ambiguity as dot segments can result from later
* parameter removal or % encoding expansion, that are not removed from the URI
* by {@link URIUtil#canonicalPath(String)}. Thus this class flags such ambiguous
* path segments, so that they may be rejected by the server if so configured.
*/
private static final Trie<Boolean> __ambiguousSegments = new ArrayTrie<>();
static
{
__ambiguousSegments.put("%2e", Boolean.TRUE);
__ambiguousSegments.put("%2e%2e", Boolean.TRUE);
__ambiguousSegments.put(".%2e", Boolean.TRUE);
__ambiguousSegments.put("%2e.", Boolean.TRUE);
__ambiguousSegments.put("..", Boolean.FALSE);
__ambiguousSegments.put(".", Boolean.FALSE);
}
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<Ambiguous> _ambiguous = EnumSet.noneOf(Ambiguous.class);
/**
* 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;
_ambiguous.addAll(uri._ambiguous);
}
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;
_ambiguous.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))
_path = uri;
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 encoded = false; // set to true if the path contains % encoded characters
boolean dot = false; // set to true if the path containers . or .. segments
int escapedSlash = 0; // state of parsing a %2f
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 ';':
mark = i + 1;
state = State.PARAM;
break;
case '?':
// assume empty path (if seen at start)
_path = "";
mark = i + 1;
state = State.QUERY;
break;
case '#':
mark = i + 1;
state = State.FRAGMENT;
break;
case '*':
_path = "*";
state = State.ASTERISK;
break;
case '%':
encoded = true;
escapedSlash = 1;
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;
}
}
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 be in an encoded path
encoded = true;
escapedSlash = 1;
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;
}
continue;
}
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;
}
continue;
}
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;
}
continue;
}
case PATH:
{
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 '/':
checkSegment(uri, segment, i, false);
segment = i + 1;
break;
case '.':
dot |= segment == i;
break;
case '%':
encoded = true;
escapedSlash = 1;
break;
case '2':
escapedSlash = escapedSlash == 1 ? 2 : 0;
break;
case 'f':
case 'F':
if (escapedSlash == 2)
_ambiguous.add(Ambiguous.SEPARATOR);
escapedSlash = 0;
break;
default:
escapedSlash = 0;
break;
}
continue;
}
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 '/':
encoded = true;
segment = i + 1;
state = State.PATH;
break;
case ';':
// multiple parameters
mark = i + 1;
break;
default:
break;
}
continue;
}
case QUERY:
{
if (c == '#')
{
_query = uri.substring(mark, i);
mark = i + 1;
state = State.FRAGMENT;
}
continue;
}
case ASTERISK:
{
throw new IllegalArgumentException("Bad character '*'");
}
case FRAGMENT:
{
_fragment = uri.substring(mark, end);
i = end;
break;
}
default:
break;
}
}
switch (state)
{
case START:
break;
case SCHEME_OR_PATH:
_path = uri.substring(mark, end);
break;
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 ASTERISK:
break;
case FRAGMENT:
_fragment = uri.substring(mark, end);
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;
default:
break;
}
if (!encoded && !dot)
{
if (_param == null)
_decodedPath = _path;
else
_decodedPath = _path.substring(0, _path.length() - _param.length() - 1);
}
else if (_path != null)
{
String canonical = URIUtil.canonicalPath(_path);
if (canonical == null)
throw new BadMessageException("Bad URI");
_decodedPath = URIUtil.decodePath(canonical);
}
}
/**
* 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)
{
if (!_ambiguous.contains(Ambiguous.SEGMENT))
{
Boolean ambiguous = __ambiguousSegments.get(uri, segment, end - segment);
if (ambiguous == Boolean.TRUE)
_ambiguous.add(Ambiguous.SEGMENT);
else if (param && ambiguous == Boolean.FALSE)
_ambiguous.add(Ambiguous.PARAM);
}
}
/**
* @return True if the URI has a possibly ambiguous segment like '..;' or '%2e%2e'
*/
public boolean hasAmbiguousSegment()
{
return _ambiguous.contains(Ambiguous.SEGMENT);
}
/**
* @return True if the URI has a possibly ambiguous separator of %2f
*/
public boolean hasAmbiguousSeparator()
{
return _ambiguous.contains(Ambiguous.SEPARATOR);
}
/**
* @return True if the URI has a possibly ambiguous path parameter like '..;'
*/
public boolean hasAmbiguousParameter()
{
return _ambiguous.contains(Ambiguous.PARAM);
}
/**
* @return True if the URI has either an {@link #hasAmbiguousSegment()} or {@link #hasAmbiguousSeparator()}.
*/
public boolean isAmbiguous()
{
return !_ambiguous.isEmpty();
}
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;
}
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<String> parameters)
{
if (_query == null)
return;
UrlEncoded.decodeUtf8To(_query, parameters);
}
public void decodeQueryTo(MultiMap<String> parameters, String encoding) throws UnsupportedEncodingException
{
decodeQueryTo(parameters, Charset.forName(encoding));
}
public void decodeQueryTo(MultiMap<String> 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)
{
_host = host;
_port = port;
_uri = null;
}
/**
* @param path the path
*/
public void setPath(String path)
{
_uri = null;
_path = null;
if (path != null)
parse(State.PATH, path, 0, path.length());
}
public void setPathQuery(String pathQuery)
{
_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());
}
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;
}
}