I don't know what Coldfusion can do or cannot do (I'm not familiar
with it), but HTTP _is_ capable for sending binary data without
any encodings. So if you cannot send binary data from Coldfusion then
it is a limitation in Coldfusion itself and not in HTTP.
However if you are using base64 here as an encryption for making
harder to obtain the downloaded image from browser's cache, then
that's OK :)
Attila
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From: Muzak <[EMAIL PROTECTED]>
To: Rkos Attila <[EMAIL PROTECTED]>
Date: Thursday, August 9, 2007, 3:05:01 PM
Subject: [Flashcoders] Prevent flash from caching the loaded assets
--====----====----====----====----====----====----====----====----====----===--
You can't send raw binary data over http, it has to be Base64 encoded.
This part is required in the Coldfusion page:
<cfset img64 = toBase64(imgBinary) />
<cfoutput>#img64#</cfoutput>
Coldfusion throws an error when using the following:
<cfsetting enablecfoutputonly="yes" showdebugoutput="no">
<cfset imgPath = ExpandPath ("leaves.jpg") />
<cffile action="readBinary" file="#imgPath#" variable="imgBinary">
<cfoutput>#imgBinary#</cfoutput>
<quote>
ByteArray objects cannot be converted to strings
</quote>
If you'd use remoting or a socket, then the Base64 encoding is not required.
regards,
Muzak
----- Original Message -----
From: "Rkos Attila" <[EMAIL PROTECTED]>
To: "Muzak" <[email protected]>
Sent: Thursday, August 09, 2007 2:03 PM
Subject: Re[2]: [Flashcoders] Prevent flash from caching the loaded assets
>
> Base64 is superfluous here, since you can load raw binary data - see
> URLLoader.dataFormat.
>
> Attila
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> From: Muzak <[EMAIL PROTECTED]>
> To: [email protected] <[email protected]>
> Date: Thursday, August 9, 2007, 4:37:02 AM
> Subject: [Flashcoders] Prevent flash from caching the loaded assets
> --====----====----====----====----====----====----====----====----====----===--
> With AS3 you can load the image as binary data (Base64 encoded).
>
>
> import flash.events.*;
> import flash.net.*;
> import flash.display.Loader;
> import flash.utils.ByteArray;
> import com.dynamicflash.util.Base64;
>
> var url:String =
> "http://www.muzakdeezign.com/flashcoders/binary_image/image.cfm";
> var imgLoader:Loader;
> var imgReq:URLRequest;
> var imgURLLoader:URLLoader;
>
> function imgLoaderCompleteHandler(evt:Event):void {
> trace("Application ::: imgLoaderCompleteHandler");
> var imgData:ByteArray = Base64.decodeToByteArray(evt.currentTarget.data);
> imgLoader = new Loader();
> imgLoader.loadBytes(imgData);
> addChild(imgLoader);
> }
>
> imgReq = new URLRequest(url);
>
> imgURLLoader = new URLLoader();
> imgURLLoader.addEventListener(Event.COMPLETE, imgLoaderCompleteHandler);
> imgURLLoader.load(imgReq);
>
>
>
> // see it in action
> http://www.muzakdeezign.com/flashcoders/binary_image/load_binary.html
>
>
> The Coldfusion file contains the following:
>
> <cfsetting enablecfoutputonly="yes" showdebugoutput="no">
> <cfcontent type="application/x-shockwave-flash" />
>
> <cfset imgPath = ExpandPath("leaves.jpg") />
> <cffile action="readBinary" file="#imgPath#" variable="imgBinary" />
> <cfset img64 = toBase64(imgBinary) />
>
> <cfoutput>#img64#</cfoutput>
>
>
> Note that I added a cfcontent tag that changes the content type to Flash, so
> when viewing the cfm page directly in your browser,
> it
> will *try* to display an swf (and fail) ;-)
> http://www.muzakdeezign.com/flashcoders/binary_image/image.cfm
>
> I used a Binary64 class to convert the loaded binary data to ByteArray.
> http://www.dynamicflash.com/goodies/base64
>
> regards,
> Muzak
>
>
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