Package com.restfb.util

Class EncodingUtils

java.lang.Object

com.restfb.util.EncodingUtils

public final class EncodingUtils
extends Object

A collection of data-encoding utility methods.

Since:

1.6.13

Author:

Josef Gierbl, Mikael Grev, Mark Allen

Method Summary

Modifier and Type	Method	Description
static byte[]	decodeBase64(String base64)	Decodes a base64-encoded string, padding out if necessary.
static String	encodeAppSecretProof(String appSecret, String accessToken)	Generates an appsecret_proof for facebook.
static byte[]	encodeHex(byte[] data)	Encodes a hex byte[] from given byte[].

Methods inherited from class java.lang.Object

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

Method Details

decodeBase64

public static byte[] decodeBase64(String base64)

Decodes a base64-encoded string, padding out if necessary.

Parameters:

base64 - The base64-encoded string to decode.

Returns:

A decoded version of base64.

Throws:

NullPointerException - If base64 is null.

encodeHex

public static byte[] encodeHex(byte[] data)

Encodes a hex byte[] from given byte[].

This function is equivalent to Apache commons-codec binary new Hex().encode(byte[])

Parameters:

data - The data to encode as hex.

Returns:

Hex-encoded byte[]

Throws:

NullPointerException - If data is null.

encodeAppSecretProof

public static String encodeAppSecretProof(String appSecret,
 String accessToken)

Generates an appsecret_proof for facebook.

See https://developers.facebook.com/docs/graph-api/securing-requests for more info

Parameters:

appSecret - The facebook application secret

accessToken - The facebook access token

Returns:

A Hex encoded SHA256 Hash as a String