platform/sensinact-utils/src/main/java/org/json/HTTP.java

package org.json;

/*******************************************************************************
 * Copyright (c) 2002 JSON.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ******************************************************************************/

import java.util.Iterator;

/**
 * Convert an HTTP header to a JSONObject and back.
 *
 * @author JSON.org
 * @version 2008-09-18
 */
public class HTTP {

    /**
     * Carriage return/line feed.
     */
    public static final String CRLF = "\r\n";

    /**
     * Convert an HTTP header string into a JSONObject. It can be a request
     * header or a response header. A request header will contain
     * <pre>{
     *    Method: "POST" (for example),
     *    "Request-URI": "/" (for example),
     *    "HTTP-Version": "HTTP/1.1" (for example)
     * }</pre>
     * A response header will contain
     * <pre>{
     *    "HTTP-Version": "HTTP/1.1" (for example),
     *    "Status-Code": "200" (for example),
     *    "Reason-Phrase": "OK" (for example)
     * }</pre>
     * In addition, the other parameters in the header will be captured, using
     * the HTTP field names as JSON names, so that <pre>
     *    Date: Sun, 26 May 2002 18:06:04 GMT
     *    Cookie: Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s
     *    Cache-Control: no-cache</pre>
     * become
     * <pre>{...
     *    Date: "Sun, 26 May 2002 18:06:04 GMT",
     *    Cookie: "Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s",
     *    "Cache-Control": "no-cache",
     * ...}</pre>
     * It does no further checking or conversion. It does not parse dates.
     * It does not do '%' transforms on URLs.
     *
     * @param string An HTTP header string.
     * @return A JSONObject containing the elements and attributes
     * of the XML string.
     * @throws JSONException
     */
    public static JSONObject toJSONObject(String string) throws JSONException {
        JSONObject o = new JSONObject();
        HTTPTokener x = new HTTPTokener(string);
        String t;

        t = x.nextToken();
        if (t.toUpperCase().startsWith("HTTP")) {

// Response

            o.put("HTTP-Version", t);
            o.put("Status-Code", x.nextToken());
            o.put("Reason-Phrase", x.nextTo('\0'));
            x.next();

        } else {

// Request

            o.put("Method", t);
            o.put("Request-URI", x.nextToken());
            o.put("HTTP-Version", x.nextToken());
        }

// Fields

        while (x.more()) {
            String name = x.nextTo(':');
            x.next(':');
            o.put(name, x.nextTo('\0'));
            x.next();
        }
        return o;
    }


    /**
     * Convert a JSONObject into an HTTP header. A request header must contain
     * <pre>{
     *    Method: "POST" (for example),
     *    "Request-URI": "/" (for example),
     *    "HTTP-Version": "HTTP/1.1" (for example)
     * }</pre>
     * A response header must contain
     * <pre>{
     *    "HTTP-Version": "HTTP/1.1" (for example),
     *    "Status-Code": "200" (for example),
     *    "Reason-Phrase": "OK" (for example)
     * }</pre>
     * Any other members of the JSONObject will be output as HTTP fields.
     * The result will end with two CRLF pairs.
     *
     * @param o A JSONObject
     * @return An HTTP header string.
     * @throws JSONException if the object does not contain enough
     *                       information.
     */
    public static String toString(JSONObject o) throws JSONException {
        Iterator keys = o.keys();
        String s;
        StringBuffer sb = new StringBuffer();
        if (o.has("Status-Code") && o.has("Reason-Phrase")) {
            sb.append(o.getString("HTTP-Version"));
            sb.append(' ');
            sb.append(o.getString("Status-Code"));
            sb.append(' ');
            sb.append(o.getString("Reason-Phrase"));
        } else if (o.has("Method") && o.has("Request-URI")) {
            sb.append(o.getString("Method"));
            sb.append(' ');
            sb.append('"');
            sb.append(o.getString("Request-URI"));
            sb.append('"');
            sb.append(' ');
            sb.append(o.getString("HTTP-Version"));
        } else {
            throw new JSONException("Not enough material for an HTTP header.");
        }
        sb.append(CRLF);
        while (keys.hasNext()) {
            s = keys.next().toString();
            if (!s.equals("HTTP-Version") && !s.equals("Status-Code") && !s.equals("Reason-Phrase") && !s.equals("Method") && !s.equals("Request-URI") && !o.isNull(s)) {
                sb.append(s);
                sb.append(": ");
                sb.append(o.getString(s));
                sb.append(CRLF);
            }
        }
        sb.append(CRLF);
        return sb.toString();
    }
}