com.dropbox.core.util

Class StringUtil

java.lang.Object

com.dropbox.core.util.StringUtil

public class StringUtil
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	Base64Digits
static String	UrlSafeBase64Digits
static Charset	UTF8

Constructor Summary

Constructors

Constructor and Description
StringUtil()

Method Summary

Modifier and Type	Method and Description
static String	base64Encode(byte[] data)
static String	base64EncodeGeneric(String digits, byte[] data)
static String	binaryToHex(byte[] data)
static String	binaryToHex(byte[] data, int offset, int length) Convert a string of binary bytes to the equivalent hexadecimal string.
static char	hexDigit(int i)
static String	javaQuotedLiteral(String value) Given a string, returns the representation of that string as a Java string literal.
static String	jq(String value) Shorthand for javaQuotedLiteral(java.lang.String).
static boolean	secureStringEquals(String a, String b) When you're comparing two strings for equality and one of them is a value that could be provided by an attacker and the other is a value that the attacker shouldn't know, use this function to check for equality.
static byte[]	stringToUtf8(String s)
static String	urlSafeBase64Encode(byte[] data)
static String	utf8ToString(byte[] utf8Data)
static String	utf8ToString(byte[] utf8Data, int offset, int length)

Methods inherited from class java.lang.Object

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

Field Detail

UTF8

public static final Charset UTF8

Base64Digits

public static final String Base64Digits

See Also:

Constant Field Values

UrlSafeBase64Digits

public static final String UrlSafeBase64Digits

See Also:

Constant Field Values

Constructor Detail

StringUtil

public StringUtil()

Method Detail

hexDigit

public static char hexDigit(int i)

utf8ToString

public static String utf8ToString(byte[] utf8Data)
                           throws CharacterCodingException

Throws:

CharacterCodingException

utf8ToString

public static String utf8ToString(byte[] utf8Data,
                                  int offset,
                                  int length)
                           throws CharacterCodingException

Throws:

CharacterCodingException

stringToUtf8

public static byte[] stringToUtf8(String s)

javaQuotedLiteral

public static String javaQuotedLiteral(String value)

Given a string, returns the representation of that string as a Java string literal.

jq

public static String jq(String value)

Shorthand for javaQuotedLiteral(java.lang.String).

binaryToHex

public static String binaryToHex(byte[] data)

binaryToHex

public static String binaryToHex(byte[] data,
                                 int offset,
                                 int length)

Convert a string of binary bytes to the equivalent hexadecimal string. The resulting String will have two characters for every byte in the input.

secureStringEquals

public static boolean secureStringEquals(String a,
                                         String b)

When you're comparing two strings for equality and one of them is a value that could be provided by an attacker and the other is a value that the attacker shouldn't know, use this function to check for equality. Using regular String.equals is not secure.

base64Encode

public static String base64Encode(byte[] data)

urlSafeBase64Encode

public static String urlSafeBase64Encode(byte[] data)

base64EncodeGeneric

public static String base64EncodeGeneric(String digits,
                                         byte[] data)