Package dev.brachtendorf

Class NetworkUtil

java.lang.Object

dev.brachtendorf.NetworkUtil

public class NetworkUtil
extends Object

Constructor Summary

Constructors

Constructor	Description
NetworkUtil()

Method Summary

Modifier and Type	Method	Description
static String	collectSocket(Socket s)	Read all the content available to be read by the socket and return the content as a String.
static String	collectSocket(Socket s, int msTimeout)	Read all the content available to be read by the socket and return the content as a String.
static String	collectSocketAndClose(Socket s)	Read all the content available to be read by the socket and return the content as a String.
static String	dumpReader(BufferedReader br)	Collect all content available in the reader and return it as a string
static String	readLineFromURL(String url)	Read a single line from a given url
static InetAddress	resolvePublicAddress()	Resolves the public facing ip address of this network.
static InetAddress	resolveSiteLocalAddress()	Resolves the first found link local address of the current machine 192.168.xxx.xxx.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NetworkUtil

public NetworkUtil()

Method Detail

resolveSiteLocalAddress

public static InetAddress resolveSiteLocalAddress()
                                           throws IOException

Resolves the first found link local address of the current machine 192.168.xxx.xxx. This is a fix for InetAddress.getLocalHost().getHostAddress(); which in some cases will resolve to a loopback address (127.0.01).

Site local addresses 192.168.xxx.xxx are available inside the same network. Same counts for 10.xxx.xxx.xxx addresses, and 172.16.xxx.xxx through 172.31.xxx.xxx

Link local addresses 169.254.xxx.xxx are for a single network segment

Addresses in the range 224.xxx.xxx.xxx through 239.xxx.xxx.xxx are multicast addresses.

Broadcast address 255.255.255.255.

Loopback addresses 127.xxx.xxx.xxx

Returns:

link local address of the machine or InetAddress.getLocalHost() if no address can be found.

Throws:

IOException - if address can not be resolved

Since:

1.0.0 com.github.kilianB

resolvePublicAddress

public static InetAddress resolvePublicAddress()
                                        throws IOException

Resolves the public facing ip address of this network. The public ip address is not the ip address assigned by the router, but rather the ip address exposed during web requests. External hosts trying to access this device will use this ip.

Returns:

the public ip address of this network.

Throws:

IOException - if the ip can not be resolved

Since:

1.5.9 com.github.kilianB

readLineFromURL

public static String readLineFromURL(String url)
                              throws IOException

Read a single line from a given url

Parameters:

url - the url to read a line from

Returns:

the content of the first line as returned by the url

Throws:

IOException - if an io error occurs

Since:

1.5.9 com.github.kilianB, 1.5.10 public com.github.kilianB

dumpReader

public static String dumpReader(BufferedReader br)
                         throws IOException

Collect all content available in the reader and return it as a string

Parameters:

br - Buffered Reader input source

Returns:

Content of the reader as string

Throws:

IOException - Exception thrown during read operation.

Since:

1.0.0 com.github.kilianB

collectSocketAndClose

public static String collectSocketAndClose(Socket s)
                                    throws IOException

Read all the content available to be read by the socket and return the content as a String. The socket is closed after reading is done.

Parameters:

s - The socket

Returns:

the content of the sockets input stream as string

Throws:

IOException - if an IOError occurs

Since:

1.0.0 com.github.kilianB

collectSocket

public static String collectSocket(Socket s)
                            throws IOException

Read all the content available to be read by the socket and return the content as a String.

Parameters:

s - The socket

Returns:

the content of the sockets input stream as string

Throws:

IOException - if an IOError occurs

Since:

1.0.0 com.github.kilianB

collectSocket

public static String collectSocket(Socket s,
                                   int msTimeout)
                            throws IOException

Read all the content available to be read by the socket and return the content as a String.

Parameters:

s - The socket

msTimeout - the time elapsed after the last character is read.

Returns:

the content of the sockets input stream as string

Throws:

IOException - if an IOError occurs

Since:

1.0.0 com.github.kilianB