Action Message Format

Action Message Format

AMF is a binary format based loosely on the Simple Object Access Protocol (SOAP). It is used primarily to exchange data between an Adobe 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.

AMF was introduced with Flash Player 6, and this version is referred to as AMF 0. It was unchanged until the release of Flash Player 9 and ActionScript 3.0, when new data types and language features prompted an update, called AMF 3. [ [http://download.macromedia.com/pub/labs/amf/amf0_spec_121207.pdf Adobe Systems Inc ] ]

Adobe Systems published the AMF binary data protocol specification [ [http://download.macromedia.com/pub/labs/amf/amf3_spec_121207.pdf Adobe Systems Inc ] ] on December 13, 2007 and announced that it will support the developer community to make this protocol available for every major server platform.

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 byte, and the second byte is the least significant byte.
* 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 shorter than 2^16 (65,536) bytes. It is made of 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

* http://osflash.org/documentation/amf
* http://livedocs.adobe.com/flex/201/langref/flash/net/ObjectEncoding.html
* http://pyamf.org/ (AMF for Python)
* http://www.themidnightcoders.com/weborb/php (AMF for PHP)
* http://www.amfphp.org (AMF for PHP)
* http://osflash.org/sabreamf (AMF for PHP5)
* http://labs.adobe.com/technologies/blazeds/ (AMF for Java)
* http://www.themidnightcoders.com/weborb/java (AMF for Java)
* http://www.osflash.org/red5 (AMF for Java)
* http://www.graniteds.org/ (AMF for Java)
* http://www.themidnightcoders.com/weborb/dotnet (AMF for .NET)
* http://fluorine.thesilentgroup.com/ (AMF for .Net)
* http://www.themidnightcoders.com/weborb/rubyonrails/ (AMF for Ruby on Rails)
* http://www.dpdk.nl/opensource/flash-remoting-and-resultsets-for-actionscript3 (communicating via amf with flash actionscript 3)


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Action Message Format — AMF (sigle de Action Message Format) est un format binaire d échange de données inspiré de Simple Object Access Protocol (SOAP). Il a été créé à l origine pour permettre l échange de données entre une animation Adobe Flash et d autres systèmes… …   Wikipédia en Français

  • Emergency Action Message — An Emergency Action Message (EAM) is a preformatted message that directs nuclear capable forces to execute specific Major Attack Options (MAOs) or Limited Attack Options (LAOs) in a nuclear war. Individual countries or specific regions may be… …   Wikipedia

  • Message to Michael — Single by Dionne Warwick from the album Dionne Warwick in Paris …   Wikipedia

  • Message Handling System — (MHS) is an important early email protocol developed by Action Technologies, Inc. (ATI) in 1986. Novell licensed it in 1988 then later bought it. Contents 1 Role as a gateway 2 Work alike products 3 Email clients …   Wikipedia

  • Corporate action — Corporate finance …   Wikipedia

  • Internet Message Access Protocol Authentication — SMTP AUTH est une extension du protocole SMTP. C est un protocole de transfert des courriels sur Internet qui inclut une étape d authentification au cours de laquelle le client se connecte explicitement au serveur (ou relais) pour l envoi de… …   Wikipédia en Français

  • Internet message access protocol authentication — SMTP AUTH est une extension du protocole SMTP. C est un protocole de transfert des courriels sur Internet qui inclut une étape d authentification au cours de laquelle le client se connecte explicitement au serveur (ou relais) pour l envoi de… …   Wikipédia en Français

  • Specific Area Message Encoding — or SAME is the protocol used to encode the Emergency Alert System in the U.S. for broadcast stations. It was originally created for NOAA Weather Radio by the National Weather Service, and was later adopted by the FCC for regular broadcasters on… …   Wikipedia

  • Subliminal message — A subliminal message is a signal or message embedded in another medium, designed to pass below the normal limits of the human mind s perception. These messages are unrecognizable by the conscious mind, but in certain situations can affect the… …   Wikipedia

  • Internet Message Access Protocol — IMAP redirects here. For the antipsychotic, see Fluspirilene. Internet protocol suite Application layer BGP …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”