HTTP.java
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上传日期:2021-09-03
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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.
- */
- import java.util.Iterator;
- import java.util.NoSuchElementException;
- import java.text.ParseException;
- /**
- * Convert an HTTP header to a JSONObject and back.
- * @author JSON.org
- * @version 0.1
- */
- public class HTTP {
- private HTTP() {}
- /** Carriage return/line feed. */
- public static final String CRLF = "rn";
- /**
- * 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.
- * @throws ParseException
- * @param string An HTTP header string.
- * @return A JSONObject containing the elements and attributes
- * of the XML string.
- */
- public static JSONObject toJSONObject(String string) throws ParseException {
- 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(' '));
- 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(' '));
- 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.
- * @throws NoSuchElementException if the object does not contain enough
- * information.
- * @param o A JSONObject
- * @return An HTTP header string.
- */
- public static String toString(JSONObject o) throws NoSuchElementException {
- 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 NoSuchElementException(
- "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();
- }
- }