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Jetty example source code file (HttpUtils.java)
The Jetty HttpUtils.java source code
/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
*
* Portions Copyright Apache Software Foundation.
*/
package javax.servlet.http;
import javax.servlet.ServletInputStream;
import java.util.Hashtable;
import java.util.ResourceBundle;
import java.util.StringTokenizer;
import java.io.IOException;
/**
* @deprecated As of Java(tm) Servlet API 2.3.
* These methods were only useful
* with the default encoding and have been moved
* to the request interfaces.
*
*/
public class HttpUtils {
private static final String LSTRING_FILE =
"javax.servlet.http.LocalStrings";
private static ResourceBundle lStrings =
ResourceBundle.getBundle(LSTRING_FILE);
/**
* Constructs an empty <code>HttpUtils object.
*
*/
public HttpUtils() {}
/**
*
* Parses a query string passed from the client to the
* server and builds a <code>HashTable object
* with key-value pairs.
* The query string should be in the form of a string
* packaged by the GET or POST method, that is, it
* should have key-value pairs in the form <i>key=value,
* with each pair separated from the next by a & character.
*
* <p>A key can appear more than once in the query string
* with different values. However, the key appears only once in
* the hashtable, with its value being
* an array of strings containing the multiple values sent
* by the query string.
*
* <p>The keys and values in the hashtable are stored in their
* decoded form, so
* any + characters are converted to spaces, and characters
* sent in hexadecimal notation (like <i>%xx) are
* converted to ASCII characters.
*
* @param s a string containing the query to be parsed
*
* @return a <code>HashTable object built
* from the parsed key-value pairs
*
* @exception IllegalArgumentException if the query string
* is invalid
*
*/
static public Hashtable parseQueryString(String s) {
String valArray[] = null;
if (s == null) {
throw new IllegalArgumentException();
}
Hashtable ht = new Hashtable();
StringBuffer sb = new StringBuffer();
StringTokenizer st = new StringTokenizer(s, "&");
while (st.hasMoreTokens()) {
String pair = (String)st.nextToken();
int pos = pair.indexOf('=');
if (pos == -1) {
// XXX
// should give more detail about the illegal argument
throw new IllegalArgumentException();
}
String key = parseName(pair.substring(0, pos), sb);
String val = parseName(pair.substring(pos+1, pair.length()), sb);
if (ht.containsKey(key)) {
String oldVals[] = (String []) ht.get(key);
valArray = new String[oldVals.length + 1];
for (int i = 0; i < oldVals.length; i++)
valArray[i] = oldVals[i];
valArray[oldVals.length] = val;
} else {
valArray = new String[1];
valArray[0] = val;
}
ht.put(key, valArray);
}
return ht;
}
/**
*
* Parses data from an HTML form that the client sends to
* the server using the HTTP POST method and the
* <i>application/x-www-form-urlencoded MIME type.
*
* <p>The data sent by the POST method contains key-value
* pairs. A key can appear more than once in the POST data
* with different values. However, the key appears only once in
* the hashtable, with its value being
* an array of strings containing the multiple values sent
* by the POST method.
*
* <p>The keys and values in the hashtable are stored in their
* decoded form, so
* any + characters are converted to spaces, and characters
* sent in hexadecimal notation (like <i>%xx) are
* converted to ASCII characters.
*
*
*
* @param len an integer specifying the length,
* in characters, of the
* <code>ServletInputStream
* object that is also passed to this
* method
*
* @param in the <code>ServletInputStream
* object that contains the data sent
* from the client
*
* @return a <code>HashTable object built
* from the parsed key-value pairs
*
*
* @exception IllegalArgumentException if the data
* sent by the POST method is invalid
*
*/
static public Hashtable parsePostData(int len,
ServletInputStream in)
{
// XXX
// should a length of 0 be an IllegalArgumentException
if (len <=0)
return new Hashtable(); // cheap hack to return an empty hash
if (in == null) {
throw new IllegalArgumentException();
}
//
// Make sure we read the entire POSTed body.
//
byte[] postedBytes = new byte [len];
try {
int offset = 0;
do {
int inputLen = in.read (postedBytes, offset, len - offset);
if (inputLen <= 0) {
String msg = lStrings.getString("err.io.short_read");
throw new IllegalArgumentException (msg);
}
offset += inputLen;
} while ((len - offset) > 0);
} catch (IOException e) {
throw new IllegalArgumentException(e.getMessage());
}
// XXX we shouldn't assume that the only kind of POST body
// is FORM data encoded using ASCII or ISO Latin/1 ... or
// that the body should always be treated as FORM data.
//
try {
String postedBody = new String(postedBytes, 0, len, "8859_1");
return parseQueryString(postedBody);
} catch (java.io.UnsupportedEncodingException e) {
// XXX function should accept an encoding parameter & throw this
// exception. Otherwise throw something expected.
throw new IllegalArgumentException(e.getMessage());
}
}
/*
* Parse a name in the query string.
*/
static private String parseName(String s, StringBuffer sb) {
sb.setLength(0);
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
switch (c) {
case '+':
sb.append(' ');
break;
case '%':
try {
sb.append((char) Integer.parseInt(s.substring(i+1, i+3),
16));
i += 2;
} catch (NumberFormatException e) {
// XXX
// need to be more specific about illegal arg
throw new IllegalArgumentException();
} catch (StringIndexOutOfBoundsException e) {
String rest = s.substring(i);
sb.append(rest);
if (rest.length()==2)
i++;
}
break;
default:
sb.append(c);
break;
}
}
return sb.toString();
}
/**
*
* Reconstructs the URL the client used to make the request,
* using information in the <code>HttpServletRequest object.
* The returned URL contains a protocol, server name, port
* number, and server path, but it does not include query
* string parameters.
*
* <p>Because this method returns a
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