httptokener.java

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package org.json;

import java.text.ParseException;

/**
 * The HTTPTokener extends the JSONTokener to provide additional methods
 * for the parsing of HTTP headers.
 * <p>
 * Public Domain 2002 JSON.org
 * @author JSON.org
 * @version 0.1
 */
public class HTTPTokener extends JSONTokener {

    /**
     * Construct an XMLTokener from a string.
     * @param s A source string.
     */
    public HTTPTokener(String s) {
        super(s);
    }


    /**
     * Get the next token or string. This is used in parsing HTTP headers.
     * @throws ParseException
     * @return A String.
     */
    public String nextToken() throws ParseException {
        char c;
        char q;
        StringBuffer sb = new StringBuffer();
        do {
            c = next();
        } while (Character.isWhitespace(c));
        if (c == '"' || c == '\'') {
            q = c;
            while (true) {
                c = next();
                if (c < ' ') {
                    throw syntaxError("Unterminated string.");
                }
                if (c == q) {
                    return sb.toString();
                }
                sb.append(c);
            }
        } else {
            while (true) {
                if (c == 0 || Character.isWhitespace(c)) {
                    return sb.toString();
                }
                sb.append(c);
                c = next();
            }
        }
    }
}