List parseCookies()

in lib/src/http_headers_impl.dart [528:598]
62 lines of code
22 McCabe index (conditional complexity)

  List<Cookie> parseCookies() {
    // Parse a Cookie header value according to the rules in RFC 6265.
    var cookies = <Cookie>[];
    void parseCookieString(String s) {
      int index = 0;

      bool done() => index == -1 || index == s.length;

      void skipWS() {
        while (!done()) {
          if (s[index] != " " && s[index] != "\t") return;
          index++;
        }
      }

      String parseName() {
        int start = index;
        while (!done()) {
          if (s[index] == " " || s[index] == "\t" || s[index] == "=") break;
          index++;
        }
        return s.substring(start, index);
      }

      String parseValue() {
        int start = index;
        while (!done()) {
          if (s[index] == " " || s[index] == "\t" || s[index] == ";") break;
          index++;
        }
        return s.substring(start, index);
      }

      bool expect(String expected) {
        if (done()) return false;
        if (s[index] != expected) return false;
        index++;
        return true;
      }

      while (!done()) {
        skipWS();
        if (done()) return;
        String name = parseName();
        skipWS();
        if (!expect("=")) {
          index = s.indexOf(';', index);
          continue;
        }
        skipWS();
        String value = parseValue();
        try {
          cookies.add(CookieImpl(name, value));
        } catch (_) {
          // Skip it, invalid cookie data.
        }
        skipWS();
        if (done()) return;
        if (!expect(";")) {
          index = s.indexOf(';', index);
          continue;
        }
      }
    }

    List<String> values = headers[HttpHeaders.COOKIE];
    if (values != null) {
      values.forEach((headerValue) => parseCookieString(headerValue));
    }
    return cookies;
  }