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/*******************************************************************************
* ============LICENSE_START==================================================
* * org.onap.dmaap
* * ===========================================================================
* * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* * ===========================================================================
* * Licensed 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.
* * ============LICENSE_END====================================================
* *
* * ECOMP is a trademark and service mark of AT&T Intellectual Property.
* *
******************************************************************************/
package org.json;
public class Cookie {
/**
* Produce a copy of a string in which the characters '+', '%', '=', ';'
* and control characters are replaced with "%hh". This is a gentle form
* of URL encoding, attempting to cause as little distortion to the
* string as possible. The characters '=' and ';' are meta characters in
* cookies. By convention, they are escaped using the URL-encoding. This is
* only a convention, not a standard. Often, cookies are expected to have
* encoded values. We encode '=' and ';' because we must. We encode '%' and
* '+' because they are meta characters in URL encoding.
* @param string The source string.
* @return The escaped result.
*/
public static String escape(String string) {
char c;
String s = string.trim();
StringBuffer sb = new StringBuffer();
int length = s.length();
for (int i = 0; i < length; i += 1) {
c = s.charAt(i);
if (c < ' ' || c == '+' || c == '%' || c == '=' || c == ';') {
sb.append('%');
sb.append(Character.forDigit((char)((c >>> 4) & 0x0f), 16));
sb.append(Character.forDigit((char)(c & 0x0f), 16));
} else {
sb.append(c);
}
}
return sb.toString();
}
/**
* Convert a cookie specification string into a JSONObject. The string
* will contain a name value pair separated by '='. The name and the value
* will be unescaped, possibly converting '+' and '%' sequences. The
* cookie properties may follow, separated by ';', also represented as
* name=value (except the secure property, which does not have a value).
* The name will be stored under the key "name", and the value will be
* stored under the key "value". This method does not do checking or
* validation of the parameters. It only converts the cookie string into
* a JSONObject.
* @param string The cookie specification string.
* @return A JSONObject containing "name", "value", and possibly other
* members.
* @throws JSONException
*/
public static JSONObject toJSONObject(String string) throws JSONException {
String name;
JSONObject jo = new JSONObject();
Object value;
JSONTokener x = new JSONTokener(string);
jo.put("name", x.nextTo('='));
x.next('=');
jo.put("value", x.nextTo(';'));
x.next();
while (x.more()) {
name = unescape(x.nextTo("=;"));
if (x.next() != '=') {
if (name.equals("secure")) {
value = Boolean.TRUE;
} else {
throw x.syntaxError("Missing '=' in cookie parameter.");
}
} else {
value = unescape(x.nextTo(';'));
x.next();
}
jo.put(name, value);
}
return jo;
}
/**
* Convert a JSONObject into a cookie specification string. The JSONObject
* must contain "name" and "value" members.
* If the JSONObject contains "expires", "domain", "path", or "secure"
* members, they will be appended to the cookie specification string.
* All other members are ignored.
* @param jo A JSONObject
* @return A cookie specification string
* @throws JSONException
*/
public static String toString(JSONObject jo) throws JSONException {
StringBuffer sb = new StringBuffer();
sb.append(escape(jo.getString("name")));
sb.append("=");
sb.append(escape(jo.getString("value")));
if (jo.has("expires")) {
sb.append(";expires=");
sb.append(jo.getString("expires"));
}
if (jo.has("domain")) {
sb.append(";domain=");
sb.append(escape(jo.getString("domain")));
}
if (jo.has("path")) {
sb.append(";path=");
sb.append(escape(jo.getString("path")));
}
if (jo.optBoolean("secure")) {
sb.append(";secure");
}
return sb.toString();
}
/**
* Convert <code>%</code><i>hh</i> sequences to single characters, and
* convert plus to space.
* @param string A string that may contain
* <code>+</code> <small>(plus)</small> and
* <code>%</code><i>hh</i> sequences.
* @return The unescaped string.
*/
public static String unescape(String string) {
int length = string.length();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < length; ++i) {
char c = string.charAt(i);
if (c == '+') {
c = ' ';
} else if (c == '%' && i + 2 < length) {
int d = JSONTokener.dehexchar(string.charAt(i + 1));
int e = JSONTokener.dehexchar(string.charAt(i + 2));
if (d >= 0 && e >= 0) {
c = (char)(d * 16 + e);
i += 2;
}
}
sb.append(c);
}
return sb.toString();
}
}
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