jodd.io

Class NetUtil

java.lang.Object

jodd.io.NetUtil

public class NetUtil
extends java.lang.Object

Network utilities.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DEFAULT_MASK
static int	INT_VALUE_127_0_0_1
static java.lang.String	LOCAL_HOST
static java.lang.String	LOCAL_IP

Constructor Summary

Constructors

Constructor and Description
NetUtil()

Method Summary

Modifier and Type	Method and Description
static byte[]	downloadBytes(java.lang.String url) Downloads resource as byte array.
static void	downloadFile(java.lang.String url, java.io.File file) Downloads resource to a file, potentially very efficiently.
static java.lang.String	downloadString(java.lang.String url) Downloads resource as String.
static java.lang.String	downloadString(java.lang.String url, java.lang.String encoding) Downloads resource as String.
static int	getIpAsInt(java.lang.String ipAddress) Returns IP address as integer.
static int	getMaskAsInt(java.lang.String mask)
static long	getRemoteFileSize(java.lang.String url) Get remote file size.
static boolean	isSocketAccessAllowed(int localIp, int socketIp, int mask)
static java.lang.String	resolveHostName(byte[] ip) Resolves host name from IP address bytes.
static java.lang.String	resolveIpAddress(java.lang.String hostname) Resolves IP address from a hostname.
static boolean	validateIPv4(java.lang.String input) Checks given string against IP address v4 format.

Methods inherited from class java.lang.Object

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

Field Detail

LOCAL_HOST

public static final java.lang.String LOCAL_HOST

See Also:

Constant Field Values

LOCAL_IP

public static final java.lang.String LOCAL_IP

See Also:

Constant Field Values

DEFAULT_MASK

public static final java.lang.String DEFAULT_MASK

See Also:

Constant Field Values

INT_VALUE_127_0_0_1

public static final int INT_VALUE_127_0_0_1

See Also:

Constant Field Values

Constructor Detail

NetUtil

public NetUtil()

Method Detail

resolveIpAddress

public static java.lang.String resolveIpAddress(java.lang.String hostname)

Resolves IP address from a hostname.

getIpAsInt

public static int getIpAsInt(java.lang.String ipAddress)

Returns IP address as integer.

getMaskAsInt

public static int getMaskAsInt(java.lang.String mask)

isSocketAccessAllowed

public static boolean isSocketAccessAllowed(int localIp,
                                            int socketIp,
                                            int mask)

validateIPv4

public static boolean validateIPv4(java.lang.String input)

Checks given string against IP address v4 format.

Parameters:

input - an ip address - may be null

Returns:

true if param has a valid ip v4 format false otherwise

See Also:

ip address v4

resolveHostName

public static java.lang.String resolveHostName(byte[] ip)

Resolves host name from IP address bytes.

downloadBytes

public static byte[] downloadBytes(java.lang.String url)
                            throws java.io.IOException

Downloads resource as byte array.

Throws:

java.io.IOException

downloadString

public static java.lang.String downloadString(java.lang.String url,
                                              java.lang.String encoding)
                                       throws java.io.IOException

Downloads resource as String.

Throws:

java.io.IOException

downloadString

public static java.lang.String downloadString(java.lang.String url)
                                       throws java.io.IOException

Downloads resource as String.

Throws:

java.io.IOException

downloadFile

public static void downloadFile(java.lang.String url,
                                java.io.File file)
                         throws java.io.IOException

Downloads resource to a file, potentially very efficiently.

Throws:

java.io.IOException

getRemoteFileSize

public static long getRemoteFileSize(java.lang.String url)
                              throws java.io.IOException

Get remote file size. Returns -1 if the content length is unknown

Parameters:

url - remote file url

Returns:

file size

Throws:

java.io.IOException - JDK-IOException