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Tag Archive for base64 at Jozef Chúťka's blog
February 16, 2010
base64 Bitmap ByteArray ExternalInterface PNGEncoder
Inline Images
Have you ever heard about inline images? Inline images use the data URI scheme to embed images directly within web pages. As defined by RFC 2397, data URIs are designed to embed small data items as “immediate” data, as if they were referenced externally. This basicaly means, you can insert base64 encoded byte code of any image directly into html file. Using inline images saves HTTP requests over externally referenced objects. Data URIs can potentially store any type of data, not just images!
November 30, 2009
base64 ByteArray compress convert hex p16Top64 p64Top16 readUnsignedInt writeUnsignedInt
Compressing hex string into base64 string
How would you convert / compress 64 character long hex string (0-9a-f) into shortest possible web-safe-char string? (base64 chars is fine) The reverse algorithm must be able to “uncompress” resulting string back into original hex.
I have created p16Top64() compress algorithm and p64Top16() uncompress (reversed) algorithm based on ByteArray class and writeUnsignedInt(), readUnsignedInt() methods. Both p16Top64() and p64Top16() methods are now part of sk.yoz.data.Serialization class. By using p16Top64() method I was able to compress original 64 chars into 44 chars. But, is it possible to compress it into less than 44 char long base64 (0-9a-Z/=) string?