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Action Message Format
Web Design & Development Guide
Action Message Format
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AMF is a binary format based loosely on the Simple Object Access
Protocol (SOAP). It is used primarily to exchange data between a flash
application and a database, using a Remote Procedure Call.
Each AMF message contains a body which holds the error or response, which
will be expressed as an
ActionScript Object.
Data Types
AMF includes several core data types which are always present throughout the
serialization of data:
- Byte - A simple 8-bit chunk of data. This is the simplest way to send
AMF data.
- Int - A 16-bit number made of two consecutive bytes. The first byte is
the most significant byt, and the second byte is the least significant byt.
- MediumInt - A 24-bit number, identical to the above except for the
length.
- Long - A 32-bit number, same as above, but longer.
- Double - A 64-bit number made up of 8 consecutive bytes. It represents a
floating point, signed number. The double is little-endian encoded.
- UTF8 - A UTF8 string longer than 2^16 bytes. It is made of a an integer
(two bytes) representing the string length, followed by the UTF8-encode
string.
- LongUTF8 - A UTF8 string possible longer than 2^16 bytes. It consists of
a long integer (four bytes) representing the string length, followed by the
UTF8 encoded string.
References
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Adobe Flex
Flash cartoons
Action Message Format
ActionScript
Adobe Shockwave
Animation portal
SWF
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