sipheaderparser.java

jsr-180 (SIP) 实现源码。可以在真实手机上使用

package com.micromethod.sipstack.ri;

import java.util.Vector;

import com.micromethod.sipstack.i.SipException;

/**
 * SipHeaderParser
 */
public class SipHeaderParser {
  /**
   * SipHeaderParser Constructor
   * 
   */
  public SipHeaderParser() {
  }

  /**
   * parseString
   * 
   * @param string
   * @return parsered Vector
   * @throws SipException
   */
  public static synchronized Vector parseString(String string)
      throws SipException {
    Vector vector = new Vector(10);
    StringBuffer stringbuffer = new StringBuffer();
    Cache o1 = null;
    boolean flag = false;
    boolean flag1 = false;
    for (short word0 = 0; word0 < string.length(); word0++) {
      char c = string.charAt(((int) (word0)));
      if (c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' || c >= 'a' && c <= 'z') {
        if (flag) {
          stringbuffer.append(c);
          continue;
        }
        if (flag1) {
          if (c >= '0' && c <= '9' || c >= 'A' && c <= 'F' || c >= 'a'
              && c <= 'f') {
            stringbuffer.append(c);
          }
          else {
            throw new SipException("Illegal IPv6 address '" + stringbuffer + c
                + "'", (byte) 0);
          }
          continue;
        }
        if (o1 != null
            && (o1.m_ctrlState == 1 || o1.m_ctrlState == 5 || o1.m_ctrlState == 3)) {
          stringbuffer.append(c);
        }
        else {
          o1 = new Cache((byte) 1);
          stringbuffer.append(c);
        }
        continue;
      }
      switch (c) {
        case 9: // '\t'
        case 32: // ' '
          if (flag) {
            stringbuffer.append(c);
            break;
          }
          if (o1 != null) {
            addParagraph(vector, o1, stringbuffer);
            o1 = null;
          }
          break;

        case 33: // '!'
        case 37: // '%'
        case 39: // '\''
        case 42: // '*'
        case 43: // '+'
        case 45: // '-'
        case 46: // '.'
        case 95: // '_'
        case 126: // '~'
          if (flag) {
            stringbuffer.append(c);
            break;
          }
          stringbuffer.append(c);
          if (o1 != null && o1.m_ctrlState == 1) {
            o1.m_ctrlState = 5;
            break;
          }
          if (o1 == null) {
            o1 = new Cache((byte) 5);
          }
          break;

        case 96: // '`'
          if (flag) {
            stringbuffer.append(c);
            break;
          }
          stringbuffer.append(c);
          if (o1 != null) {
            o1.m_ctrlState = 5;
            break;
          }
          if (o1 == null) {
            o1 = new Cache((byte) 5);
          }
          break;

        case 40: // '('
        case 41: // ')'
          if (flag) {
            stringbuffer.append(c);
            break;
          }
          stringbuffer.append(c);
          if (o1 != null) {
            o1.m_ctrlState = 3;
            break;
          }
          if (o1 == null) {
            o1 = new Cache((byte) 3);
          }
          break;

        case 36: // '$'
        case 38: // '&'
        case 44: // ','
        case 47: // '/'
        case 58: // ':'
        case 59: // ';'
        case 60: // '<'
        case 61: // '='
        case 62: // '>'
        case 63: // '?'
        case 64: // '@'
          if (flag) {
            stringbuffer.append(c);
            break;
          }
          if (flag1 && c == ':') {
            stringbuffer.append(c);
            break;
          }
          if (o1 != null) {
            addParagraph(vector, o1, stringbuffer);
          }
          stringbuffer.append(c);
          o1 = new Cache((byte) 2);
          addParagraph(vector, o1, stringbuffer);
          o1 = null;
          break;

        case 91: // '['
          if (flag) {
            stringbuffer.append(c);
            break;
          }
          flag1 = true;
          if (o1 != null) {
            addParagraph(vector, o1, stringbuffer);
          }
          stringbuffer.append(c);
          o1 = new Cache((byte) 6);
          break;

        case 93: // ']'
          if (flag) {
            stringbuffer.append(c);
            break;
          }
          if (flag1) {
            flag1 = false;
            stringbuffer.append(c);
            addParagraph(vector, o1, stringbuffer);
            o1 = null;
            break;
          }
          if (o1 != null) {
            addParagraph(vector, o1, stringbuffer);
          }
          stringbuffer.append(c);
          o1 = new Cache((byte) 2);
          addParagraph(vector, o1, stringbuffer);
          o1 = null;
          break;

        case 34: // '"'
          if (flag) {
            flag = false;
            addParagraph(vector, o1, stringbuffer);
            o1 = null;
            break;
          }
          flag = true;
          if (o1 != null) {
            addParagraph(vector, o1, stringbuffer);
          }
          o1 = new Cache((byte) 7);
          break;

        case 10: // '\n'
        case 11: // '\013'
        case 12: // '\f'
        case 13: // '\r'
        case 14: // '\016'
        case 15: // '\017'
        case 16: // '\020'
        case 17: // '\021'
        case 18: // '\022'
        case 19: // '\023'
        case 20: // '\024'
        case 21: // '\025'
        case 22: // '\026'
        case 23: // '\027'
        case 24: // '\030'
        case 25: // '\031'
        case 26: // '\032'
        case 27: // '\033'
        case 28: // '\034'
        case 29: // '\035'
        case 30: // '\036'
        case 31: // '\037'
        case 35: // '#'
        case 48: // '0'
        case 49: // '1'
        case 50: // '2'
        case 51: // '3'
        case 52: // '4'
        case 53: // '5'
        case 54: // '6'
        case 55: // '7'
        case 56: // '8'
        case 57: // '9'
        case 65: // 'A'
        case 66: // 'B'
        case 67: // 'C'
        case 68: // 'D'
        case 69: // 'E'
        case 70: // 'F'
        case 71: // 'G'
        case 72: // 'H'
        case 73: // 'I'
        case 74: // 'J'
        case 75: // 'K'
        case 76: // 'L'
        case 77: // 'M'
        case 78: // 'N'
        case 79: // 'O'
        case 80: // 'P'
        case 81: // 'Q'
        case 82: // 'R'
        case 83: // 'S'
        case 84: // 'T'
        case 85: // 'U'
        case 86: // 'V'
        case 87: // 'W'
        case 88: // 'X'
        case 89: // 'Y'
        case 90: // 'Z'
        case 92: // '\\'
        case 94: // '^'
        case 97: // 'a'
        case 98: // 'b'
        case 99: // 'c'
        case 100: // 'd'
        case 101: // 'e'
        case 102: // 'f'
        case 103: // 'g'
        case 104: // 'h'
        case 105: // 'i'
        case 106: // 'j'
        case 107: // 'k'
        case 108: // 'l'
        case 109: // 'm'
        case 110: // 'n'
        case 111: // 'o'
        case 112: // 'p'
        case 113: // 'q'
        case 114: // 'r'
        case 115: // 's'
        case 116: // 't'
        case 117: // 'u'
        case 118: // 'v'
        case 119: // 'w'
        case 120: // 'x'
        case 121: // 'y'
        case 122: // 'z'
        case 123: // '{'
        case 124: // '|'
        case 125: // '}'
        default:
          throw new SipException("Illegal character '" + c + "'", (byte) 0);
      }
    }

    if (flag1) {
      throw new SipException("Unclosed IPv6 address '" + o1.m_paragraph + "'",
          (byte) 0);
    }
    if (o1 != null) {
      addParagraph(vector, o1, stringbuffer);
    }
    o1 = new Cache((byte) -1);
    vector.addElement(((Object) (o1)));
    return vector;
  }

  /**
   * addParagraph
   * 
   * @param vectorBuffer
   * @param cache
   * @param stringbuffer
   */
  private static void addParagraph(Vector vectorBuffer, Cache cache,
      StringBuffer stringbuffer) {
    cache.m_paragraph = stringbuffer.toString().trim();
    if (cache.m_ctrlState == 2) {
      cache.m_initial = cache.m_paragraph.charAt(0);
    }
    stringbuffer.setLength(0);
    vectorBuffer.addElement(((Object) (cache)));
  }
}