Mega Code Archive
URI Support
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/**
* 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.
*/
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/**
* @version $Revision$
*/
public class URISupport {
public static class CompositeData {
private String host;
private String scheme;
private String path;
private URI components[];
private Map<String, String> parameters;
private String fragment;
public URI[] getComponents() {
return components;
}
public String getFragment() {
return fragment;
}
public Map<String, String> getParameters() {
return parameters;
}
public String getScheme() {
return scheme;
}
public String getPath() {
return path;
}
public String getHost() {
return host;
}
public URI toURI() throws URISyntaxException {
StringBuffer sb = new StringBuffer();
if (scheme != null) {
sb.append(scheme);
sb.append(':');
}
if (host != null && host.length() != 0) {
sb.append(host);
} else {
sb.append('(');
for (int i = 0; i < components.length; i++) {
if (i != 0) {
sb.append(',');
}
sb.append(components[i].toString());
}
sb.append(')');
}
if (path != null) {
sb.append('/');
sb.append(path);
}
if (!parameters.isEmpty()) {
sb.append("?");
sb.append(createQueryString(parameters));
}
if (fragment != null) {
sb.append("#");
sb.append(fragment);
}
return new URI(sb.toString());
}
}
public static Map<String, String> parseQuery(String uri) throws URISyntaxException {
try {
Map<String, String> rc = new HashMap<String, String>();
if (uri != null) {
String[] parameters = uri.split("&");
for (int i = 0; i < parameters.length; i++) {
int p = parameters[i].indexOf("=");
if (p >= 0) {
String name = URLDecoder.decode(parameters[i].substring(0, p), "UTF-8");
String value = URLDecoder.decode(parameters[i].substring(p + 1), "UTF-8");
rc.put(name, value);
} else {
rc.put(parameters[i], null);
}
}
}
return rc;
} catch (UnsupportedEncodingException e) {
throw (URISyntaxException)new URISyntaxException(e.toString(), "Invalid encoding").initCause(e);
}
}
public static Map<String, String> parseParamters(URI uri) throws URISyntaxException {
return uri.getQuery() == null ? emptyMap() : parseQuery(stripPrefix(uri.getQuery(), "?"));
}
@SuppressWarnings("unchecked")
private static Map<String, String> emptyMap() {
return Collections.EMPTY_MAP;
}
/**
* Removes any URI query from the given uri
*/
public static URI removeQuery(URI uri) throws URISyntaxException {
return createURIWithQuery(uri, null);
}
/**
* Creates a URI with the given query
*/
public static URI createURIWithQuery(URI uri, String query) throws URISyntaxException {
return new URI(uri.getScheme(), uri.getUserInfo(), uri.getHost(), uri.getPort(), uri.getPath(),
query, uri.getFragment());
}
public static CompositeData parseComposite(URI uri) throws URISyntaxException {
CompositeData rc = new CompositeData();
rc.scheme = uri.getScheme();
String ssp = stripPrefix(uri.getSchemeSpecificPart().trim(), "//").trim();
parseComposite(uri, rc, ssp);
rc.fragment = uri.getFragment();
return rc;
}
/**
* @param uri
* @param rc
* @param ssp
* @param p
* @throws URISyntaxException
*/
private static void parseComposite(URI uri, CompositeData rc, String ssp) throws URISyntaxException {
String componentString;
String params;
if (!checkParenthesis(ssp)) {
throw new URISyntaxException(uri.toString(), "Not a matching number of '(' and ')' parenthesis");
}
int p;
int intialParen = ssp.indexOf("(");
if (intialParen == 0) {
rc.host = ssp.substring(0, intialParen);
p = rc.host.indexOf("/");
if (p >= 0) {
rc.path = rc.host.substring(p);
rc.host = rc.host.substring(0, p);
}
p = ssp.lastIndexOf(")");
componentString = ssp.substring(intialParen + 1, p);
params = ssp.substring(p + 1).trim();
} else {
componentString = ssp;
params = "";
}
String components[] = splitComponents(componentString);
rc.components = new URI[components.length];
for (int i = 0; i < components.length; i++) {
rc.components[i] = new URI(components[i].trim());
}
p = params.indexOf("?");
if (p >= 0) {
if (p > 0) {
rc.path = stripPrefix(params.substring(0, p), "/");
}
rc.parameters = parseQuery(params.substring(p + 1));
} else {
if (params.length() > 0) {
rc.path = stripPrefix(params, "/");
}
rc.parameters = emptyMap();
}
}
/**
* @param componentString
* @return
*/
private static String[] splitComponents(String str) {
List<String> l = new ArrayList<String>();
int last = 0;
int depth = 0;
char chars[] = str.toCharArray();
for (int i = 0; i < chars.length; i++) {
switch (chars[i]) {
case '(':
depth++;
break;
case ')':
depth--;
break;
case ',':
if (depth == 0) {
String s = str.substring(last, i);
l.add(s);
last = i + 1;
}
break;
default:
}
}
String s = str.substring(last);
if (s.length() != 0) {
l.add(s);
}
String rc[] = new String[l.size()];
l.toArray(rc);
return rc;
}
public static String stripPrefix(String value, String prefix) {
if (value.startsWith(prefix)) {
return value.substring(prefix.length());
}
return value;
}
public static URI stripScheme(URI uri) throws URISyntaxException {
return new URI(stripPrefix(uri.getSchemeSpecificPart().trim(), "//"));
}
public static String createQueryString(Map options) throws URISyntaxException {
try {
if (options.size() > 0) {
StringBuffer rc = new StringBuffer();
boolean first = true;
for (Iterator iter = options.keySet().iterator(); iter.hasNext();) {
if (first) {
first = false;
} else {
rc.append("&");
}
String key = (String)iter.next();
String value = (String)options.get(key);
rc.append(URLEncoder.encode(key, "UTF-8"));
rc.append("=");
rc.append(URLEncoder.encode(value, "UTF-8"));
}
return rc.toString();
} else {
return "";
}
} catch (UnsupportedEncodingException e) {
throw (URISyntaxException)new URISyntaxException(e.toString(), "Invalid encoding").initCause(e);
}
}
/**
* Creates a URI from the original URI and the remaining paramaters
*
* @throws URISyntaxException
*/
public static URI createRemainingURI(URI originalURI, Map params) throws URISyntaxException {
String s = createQueryString(params);
if (s.length() == 0) {
s = null;
}
return createURIWithQuery(originalURI, s);
}
public static URI changeScheme(URI bindAddr, String scheme) throws URISyntaxException {
return new URI(scheme, bindAddr.getUserInfo(), bindAddr.getHost(), bindAddr.getPort(), bindAddr
.getPath(), bindAddr.getQuery(), bindAddr.getFragment());
}
public static boolean checkParenthesis(String str) {
boolean result = true;
if (str != null) {
int open = 0;
int closed = 0;
int i = 0;
while ((i = str.indexOf('(', i)) >= 0) {
i++;
open++;
}
i = 0;
while ((i = str.indexOf(')', i)) >= 0) {
i++;
closed++;
}
result = open == closed;
}
return result;
}
public int indexOfParenthesisMatch(String str) {
int result = -1;
return result;
}
}
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