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  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 shall be used for Good, not Evil.
 
 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.
 */
 
Convert an HTTP header to a JSONObject and back.

Author(s):
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
{
    Method: "POST" (for example),
    "Request-URI": "/" (for example),
    "HTTP-Version": "HTTP/1.1" (for example)
 }
A response header will contain
{
    "HTTP-Version": "HTTP/1.1" (for example),
    "Status-Code": "200" (for example),
    "Reason-Phrase": "OK" (for example)
 }
In addition, the other parameters in the header will be captured, using the HTTP field names as JSON names, so that
    Date: Sun, 26 May 2002 18:06:04 GMT
    Cookie: Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s
    Cache-Control: no-cache
become
{...
    Date: "Sun, 26 May 2002 18:06:04 GMT",
    Cookie: "Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s",
    "Cache-Control": "no-cache",
 ...}
It does no further checking or conversion. It does not parse dates. It does not do '%' transforms on URLs.

Parameters:
string An HTTP header string.
Returns:
A JSONObject containing the elements and attributes of the XML string.
Throws:
JSONException
 
     public static JSONObject toJSONObject(String stringthrows 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(namex.nextTo('\0'));
            x.next();
        }
        return o;
    }


    
Convert a JSONObject into an HTTP header. A request header must contain
{
    Method: "POST" (for example),
    "Request-URI": "/" (for example),
    "HTTP-Version": "HTTP/1.1" (for example)
 }
A response header must contain
{
    "HTTP-Version": "HTTP/1.1" (for example),
    "Status-Code": "200" (for example),
    "Reason-Phrase": "OK" (for example)
 }
Any other members of the JSONObject will be output as HTTP fields. The result will end with two CRLF pairs.

Parameters:
o A JSONObject
Returns:
An HTTP header string.
Throws:
JSONException if the object does not contain enough information.
    public static String toString(JSONObject othrows 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();
        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();
            }
        }
        sb.append();
        return sb.toString();
    }
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