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  package org.richfaces.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:
2
 
 public final class HTTP {
    
Carriage return/line feed.
 
     public static final String CRLF = "\r\n";
 
     private HTTP() {
     }

    
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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