ej.hoka.http.support

Class UrlDecoder

java.lang.Object

ej.hoka.http.support.UrlDecoder

public final class UrlDecoder
extends Object

Utilities for decoding percent encoded characters.

Method Summary

Modifier and Type	Method and Description
static int	decode(InputStream is, StringBuilder sb) Returns the character from the stream, which encode as "%ab" (single byte UTF-8) or "%ab%cd" (two byte ).

Methods inherited from class java.lang.Object

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

Method Detail

decode

public static int decode(InputStream is,
                         StringBuilder sb)
                  throws IOException

Returns the character from the stream, which encode as "%ab" (single byte UTF-8) or "%ab%cd" (two byte ). The initial % mark has been already reed. The character is represented as %ab where "a" and "b" is a hexa character (0-9, A-F) if the value of (a * 16 + b) > 127 the next 3 bytes will be read as the second byte of a two-byte UTF-8 char. When a character encoding problem is encountered, returns -1 (ffff). Since there is no unicode character with this code, this does not cause problems. When a percentage encoded UTF-16 Surrogate Pair is encountered (integer value above 0xFFFF) this method calculates the head and trail surrogate code point for the Unicode character. The head code point is inserted into the StringBuilder and the tail surrogate is returned. If the code doesn't denote a surrogate pair (value is less than 0xFFFF) simply return it.

Parameters:

is - the InputStream.

sb - the StringBuilder.

Returns:

the original code (if code's value less than 0xFFFF) or the tail surrogate code point of the surrogate pair.

Throws:

IOException - if an I/O error occurred reading is.