Java Utililty Methods HTTP Port Find

List of utility methods to do HTTP Port Find

  1. HOME
  2. Java
  3. H
  4. HTTP Port Find

Description

The list of methods to do HTTP Port Find are organized into topic(s).

Method

booleanwaitForPort(String host, int port)
wait For Port 
for (int i = 0; i < RETRIES; i++) {
    if (isPortAvailable(host, port))
        return true;
    try {
        Thread.sleep(WAIT_TIME_MS);
    } catch (InterruptedException e) {
return false;
HttpURLConnectionwaitForResponseCode(int code, String name, String host, int port)
wait For Response Code 
URL url = new URL("http://" + host + ":" + port + "/" + name);
long until = System.currentTimeMillis() + WAIT_TIMEOUT;
while (System.currentTimeMillis() < until) {
    HttpURLConnection connection = connect(url);
    try {
        if (connection.getResponseCode() == code) {
            return connection;
    } catch (FileNotFoundException e) {
        if (code == 404) {
            return connection;
        throw e;
throw new RuntimeException("wait on url " + url + " for response code " + code + " timed out.");
StringwaitForRespose(String name, String host, int port)
wait For Respose 
waitForResponseCode(200, name, host, port);
return getResponse(name, host, port);
booleanwaitForServerDown(String host, int port, long timeout)
wait For Server Down 
long start = System.currentTimeMillis();
while (true) {
    try {
        send4LetterWord(host, port, "stat");
    } catch (IOException e) {
        return true;
    if (System.currentTimeMillis() > start + timeout) {
...
booleanwaitForService(int port)
wait For Service 
final int MAX_TRY_COUNT = 10;
int tryCount = 0;
while (true) {
    if (isPortOccupied(port)) {
        return true;
    if (tryCount == MAX_TRY_COUNT) {
        System.err.println("Waiting for port " + port + " time out.");
...
StringwriteContactFile(int port, String appName)
Write contact details to a file only readable by the owner process and privileged local users. 
String cookie = null;
File contactFile = getConfigFile(appName + ".remote");
if (contactFile != null) {
    try {
        contactFile.createNewFile();
        Runtime.getRuntime().exec("chmod 600 " + contactFile.getPath());
    } catch (Exception e) {
    try {
        PrintStream out = new PrintStream(new FileOutputStream(contactFile));
        InetAddress addr = InetAddress.getLocalHost();
        String hexVal = Integer.toHexString((int) (Math.random() * 12345));
        cookie = hexVal + addr.hashCode();
        out.println(addr.getHostName() + " " + port + " " + cookie);
    } catch (Exception e) {
return cookie;