I have a 'Shell' swf as the main swf to protect other things in the project.
Shell swf's procedure is:
check stage property, so it can't be loaded as a child.
check Capabilities.isDebugger, so it can't be run in a debugger.
load a decoder lib. the decoder lib is built by flascc, quite difficult to decompile.
use decoder to validate self. if failed or skipped, decoder won't do any decoding job.
load encoded main entry of the project, decode it & add it to stage.
The problem is step 4, I want to do binary checksum of Shell swf.
Questiones are:
How can i get the original binary content of the Shell swf file on startup ?
if not, is Shell swf's LoaderInfo.bytes consistent in different versions of flash player ?
if not, is there any good way to do the validation job in step 4 ?
If you create an AIR app you can temporarily load original file ("Shell.swf") in application bundle using standard URLLoader or File and FileStream.
If your app will work in browser then you can get self-file-name and URL from loaderInfo and load it using URLLoader.
Anyway after your verification process complete you need unload it.
Related
It seems as though every actionscript file (not custom ones) is automatically included when coding in the timeline's actions, so I'm wondering if it's necessary to import the files through the code. Are there any advantages? Can I prevent flash from importing every file to reduce the size of my flash application (SWF)?.
For example, I don't need to import MovieClip to use the MovieClip class in timeline actions.
You can indeed load external assets, that is, anything of SWF, MP3, WAV, JPG or any byte sequence you have a decoder for, then parse it via code, then use in your Flash app. The advantages are flexibility, for example, if a user has all sounds turned off, you are free to not load large music for him thus saving him some traffic - this might be crucial for some people out there. There are also disadvantages, because the files (assets) in SWF are available from the start of your app, and because the connection can get lost at any moment, you might not receive your external files in time for the app to use, or not receive them at all.
Not importing in order to reduce the SWF size? I'd say reduce the size or quality of those assets instead. The actual mess with Loaders is something you should avoid unless you have dynamic downloadable content (some extra levels' metadata maybe) which you plan to generate on a timely basis in order to attract longer attention to your app.
In short, all static content is better embedded, all dynamic content should be loaded afterwards.
Compiling FLA file doesn't embed every AS file in the resulting SWF. My test directory structure.
Work Directory
file.fla
ClassA.as
ClassB.as
The code on my timeline.
var a:ClassA = new ClassA();
The resulting SWF only contain the ClassA.
For multiple SWF files with code, every SWF embed the class. It's your job to tell the compiler.
If you are using FLEXSDK, you can look to these parameters.
-link-report file.xml : Generate a file containing all AS file include at compilation.
-load-externs file.xml : Exclude all class containt in the file.
If you are using Adobe Flash exclude class article
I want to know how to load external class files(.as files) in actionscript but don't have to know the class file's name. Think of it like loading mods in minecraft with forge mod loader, it doesn't know the main class of the mod's file name, yet it successfully loads the mod. I want to know if something like this is possible in actionscript 3.0 because I feel like making a tower defense game that isn't like the others out there but have it so it can be modded and have mods loaded but of course I have to load the class file without knowing the class file's name.
Note: I don't got access to Adobe Air so I can't use anything that requires Adobe Air.
You want to load a particular .as file AFTER or BEFORE compilation? After the compilation it is hardly possible - the file would not be compiled and therefore it would be useless. Why don't you use a swf or some kind of XML/JSON with settings in that case? Before the compilation you would still need to identify it by it's package name/name.
Basically, you want a plugin management system.
In AS3, it is not possible to "load" a .as file on execution, because it is a (uncompiled) source file. But, it is possible to load another swf and to use the classes within it.
Your process should probably be something like this :
Get a list of the plugins/addons. If you were using AIR, it would have been possible by browsing the content of a folder. Since you're not, you'll probably need to use a listing file (basically, a file that say "Here's the list&path of the plugins you need to load".
Load each swf file
(possibly) call a initialization method for each plugin.
You may wish to look into the way OSMF manages plugins, for example : http://osmf.org/dev/osmf/OtherPDFs/osmf_plugin_dev_guide.pdf
Is there any method in as3 that flash can write file's last modified date.
Its stand alone flash application which had external swf loading. I want to check the last modified date of the swf during the loading.
please suggest any possible methods.
Thanks.
In AIR, there is File class with modificationDate property. But in plain AS3, there's no file concept at all. If you loading swf with Loader, you only get data, but not the attributes of file (and file might not exist at all if loading something by URL.)
I am coding an AIR application.
I've got directly a path of a swf file (because it was stored in a xml file).
Do yo know if it is possible to get the ByteArray from this file ?
I know that FileReference do that very well, but this class need a select event. But it isn't my case because I've allready got my path.
Thanks a lot for your answers !
In AIR, you can read/write files directly using flash.filesystem.File and flash.filesystem.FileStream.
See, for example, this article.
however you can load it with URLStream and get a ByteArray with URLStream.readBytes()
How read only part of local file? So that not to load the whole file into memory.
If you are using AIR you can use the readBytes() method of the FileStream API to specify an offset of the file where you want to start reading.
For a SWF that is running in the browser, the only method in the Flash Player 10 is the load() method of the FileReference class and that one doesn't allow you to specify an offset.