/**
* ** Returns true if the specified character should be hex-encoded in a URL ** @param ch The
* character to test ** @return True if the specified character should be hex-encoded in a URL
*/
private static boolean shouldEncodeArgChar(char ch) {
if (Character.isLetterOrDigit(ch)) {
return false;
} else if ((ch == '_') || (ch == '-') || (ch == '.')) {
return false;
} else {
return true;
}
}
/**
* Codage d'une chaine pour servir en tant que nom de fichier. Remplace tous ce qui n'est ni
* lettre ni chiffre en code hexa préfixé par _
*/
private static String codage(String s) {
StringBuffer r = new StringBuffer();
char a[] = s.toCharArray();
for (int i = 0; i < a.length; i++) {
char c = a[i];
if (!Character.isLetterOrDigit(c)) r.append(PREFIX + Util.hex(c));
else r.append(c);
}
return r.toString();
}
/**
* Helper routine to get the scheme part of a URI. The scheme part is "http:" or "file:" or "ftp:"
* most commonly. This functions searches for the first ':' that doesn't follow a '/'.
*
* @return The length of the scheme component, not counting the colon, (or alternatively the index
* of the colon), or -1 if the is no scheme.
*/
public static int uriSchemeLength(String uri) {
int len = uri.length();
for (int i = 0; i < len; i++) {
char ch = uri.charAt(i);
if (ch == ':') return i;
if (i == 0
? !Character.isLetter(ch)
: (!Character.isLetterOrDigit(ch) && ch != '+' && ch != '-' && ch != '.')) return -1;
}
return -1;
}
/**
* This method gets called when a property we're interested in is about to change. In case we
* don't like the new value we throw a PropertyVetoException to prevent the actual change from
* happening.
*
* @param evt a <tt>PropertyChangeEvent</tt> object describing the event source and the property
* that will change.
* @exception PropertyVetoException if we don't want the change to happen.
*/
public void vetoableChange(PropertyChangeEvent evt) throws PropertyVetoException {
if (evt.getPropertyName().equals(PROP_STUN_SERVER_ADDRESS)) {
// make sure that we have a valid fqdn or ip address.
// null or empty port is ok since it implies turning STUN off.
if (evt.getNewValue() == null) return;
String host = evt.getNewValue().toString();
if (host.trim().length() == 0) return;
boolean ipv6Expected = false;
if (host.charAt(0) == '[') {
// This is supposed to be an IPv6 litteral
if (host.length() > 2 && host.charAt(host.length() - 1) == ']') {
host = host.substring(1, host.length() - 1);
ipv6Expected = true;
} else {
// This was supposed to be a IPv6 address, but it's not!
throw new PropertyVetoException("Invalid address string" + host, evt);
}
}
for (int i = 0; i < host.length(); i++) {
char c = host.charAt(i);
if (Character.isLetterOrDigit(c)) continue;
if ((c != '.' && c != ':') || (c == '.' && ipv6Expected) || (c == ':' && !ipv6Expected))
throw new PropertyVetoException(host + " is not a valid address nor host name", evt);
}
} // is prop_stun_server_address
else if (evt.getPropertyName().equals(PROP_STUN_SERVER_PORT)) {
// null or empty port is ok since it implies turning STUN off.
if (evt.getNewValue() == null) return;
String port = evt.getNewValue().toString();
if (port.trim().length() == 0) return;
try {
Integer.valueOf(evt.getNewValue().toString());
} catch (NumberFormatException ex) {
throw new PropertyVetoException(port + " is not a valid port! " + ex.getMessage(), evt);
}
}
}
/**
* ** Returns true if the URL starts with a protocol definition (ie. "http://...") ** @param url
* The URL to test ** @return True if the URL starts with a protocol definition
*/
public static boolean isAbsoluteURL(String url) {
if (url == null) {
return false;
} else {
// per "http://en.wikipedia.org/wiki/URI_scheme" all URL "schemes" contain only
// alphanumeric or "." characters, and appears to be < 16 characters in length.
for (int i = 0; (i < 16) && (i < url.length()); i++) {
char ch = url.charAt(i);
if (ch == ':') {
return true; // A colon is the first non-alphanumeric we ran in to
} else if (!Character.isLetterOrDigit(ch) && (ch != '.')) {
return false;
}
}
return false;
}
}