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https://github.com/mikesmullin/amf-js
Automatic Message Format (AMF0 + AMF3-compatible) Javascript Library
https://github.com/mikesmullin/amf-js
Last synced: about 1 month ago
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Automatic Message Format (AMF0 + AMF3-compatible) Javascript Library
- Host: GitHub
- URL: https://github.com/mikesmullin/amf-js
- Owner: mikesmullin
- License: mit
- Created: 2016-07-17T17:13:23.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2024-03-07T14:32:56.000Z (10 months ago)
- Last Synced: 2024-04-14T14:50:55.132Z (9 months ago)
- Language: JavaScript
- Homepage:
- Size: 31.3 KB
- Stars: 3
- Watchers: 4
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# AMF.JS
This project uses the modern Javascript Typed Array specification (e.g, ArrayBuffer, U8intArray, DataView, etc.).
This is currently a decoder only (AMF to JSON); it will not encode (ie. no JSON to AMF)
Designed for browsers or Node.JS.
## Errata
### Inspiration
- [infomaniac-amf/js](https://github.com/infomaniac-amf/js)
### Everything you need to know about the data structure:
- [AMF0 Spec](http://download.macromedia.com/pub/labs/amf/amf0_spec_121207.pdf)
- [AMF3 Spec](https://web.archive.org/web/20170713062640/http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/amf/pdf/amf-file-format-spec.pdf)
- [Action Message Format on Wikipedia](https://en.wikipedia.org/wiki/Action_Message_Format)
- Related: [SWF Spec 19](https://open-flash.github.io/mirrors/swf-spec-19.pdf)
### Understanding [A]BNF frequently referenced throughout the spec:
- [Augmented Backus Naur Form](https://en.wikipedia.org/wiki/Augmented_Backus%E2%80%93Naur_Form)
- [Backus Naur Form](https://en.wikipedia.org/wiki/Backus%E2%80%93Naur_Form)
### Reverse-engineering via ActionScript 3:
AS3 Object serialization:
```actionscript
import com.hurlant.util.Hex;
import flash.utils.ByteArray;
// ...
public function serialize():void {
var o:Object = new Object();
o.name = "John Doe";
var byteArray:ByteArray = new ByteArray();
byteArray.writeObject(o);
trace("serialized: "+ Hex.fromArray(byteArray));
}
```
AS3 Object deserialization:
```actionscript
import com.hurlant.util.Hex;
import flash.utils.ByteArray;
// ...
public function dumpObj(oObj:Object, sPrefix:String = ""):void {
sPrefix == "" ? sPrefix = "---" : sPrefix += "---";
for (var i:* in oObj) {
trace(sPrefix, i + " : " + oObj[i], " ");
if (typeof(oObj[i]) == "object") dumpObj(oObj[i], sPrefix);
}
}
public function deserialize():void {
var byteArray:ByteArray = new ByteArrray();
// ... fill with bytes ...
var o:Object = byteArray.readObject();
trace("deserialized: "+ this.name +" hex= "+ Hex.fromArray(ba));
dumpObj(o);
}
```