as3+php上传图片的三种方式

这里的三种方式分别为：

1、二进制传输(BINARY)

2、字符串传输(String)

3、文件流上传(File)

开发IDE：FlashDevelop、Zend Studio。

1）设置FlashDevelop使用flash player10(debug版本，因为有一个demo使用了本地预览)

“工具”菜单 –》 “软件设置”（快捷键F10）—》 点击左侧的“AS3Context”，在Language中的“Default Flash Version”修改为10，选择Player Debug 的路径

2、因为在flashDevelop中使用到了fl组件，所以需要先下载fl.swc，可以在google code上下载的到，下载链接地址>>  (关于在flashdevelop中如何使用swc，可以gg一下)

3、使用到了Adobe的官方组件PNGEncoder，google code上的下载地址>>

4、使用到了as3的base64Encode，google code上的链接地址>>

一、使用二进制上传图片

完整的as3代码：

package 
{
    import com.adobe.images.JPGEncoder;
    import com.adobe.images.PNGEncoder;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Loader;
    import flash.display.MovieClip;
    import flash.display.Shape;
    import flash.display.Sprite;
    import flash.events.Event;
    import fl.controls.Button;
    import flash.events.MouseEvent;
    import flash.filters.GlowFilter;
    import flash.net.*;
    import flash.filters.BitmapFilterQuality;
    import flash.utils.ByteArray;
    
    /**
     * ...
     * @author ZhangYi
     */
    public class Main extends Sprite 
    {
        private var _base:Shape;
        private var _btn:Button;
        private var _loader:Loader;
        
        public function Main():void 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }
        
        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);
            // entry point
            
            inited();
        }
        
        private function inited():void {
            var mc:MovieClip = new MovieClip();
                mc.graphics.beginFill(0x000000, 0.2);
                mc.graphics.drawRect(0, 0, 320, 455);
                mc.x = 30;
                mc.y = 60;
            
            addChild(mc);
            
            _loader = new Loader();
            _loader.load(new URLRequest("../assets/1.png"));
            mc.addChild(_loader);
            
            _loader.addEventListener(MouseEvent.ROLL_OVER, addFilterHandler);
            _loader.addEventListener(MouseEvent.ROLL_OUT, removeFilterHandler);
            
            _btn = new Button();
            _btn.label = "截图";
            _btn.x = 30;
            _btn.y = 30;
            addChild(_btn);
            
            _btn.addEventListener(MouseEvent.CLICK, clickHandler);
        }
        
        private function clickHandler(evt:MouseEvent):void {
            var bitmapData:BitmapData = new BitmapData(_loader.width, _loader.height, true, 0);
                bitmapData.draw(_loader);
            
            //var encoder:JPGEncoder = new JPGEncoder(100);
            //var bytes:ByteArray = encoder.encode(bitmapData);
            var bytes:ByteArray = PNGEncoder.encode(bitmapData);
            
            var req:URLRequest = new URLRequest("http://meteoric.com/test/uploadFile/upload_1.php");
                req.data = bytes;
                req.method = URLRequestMethod.POST;
                req.contentType = "application/octet-stream";
            
            var loader:URLLoader = new URLLoader();
                loader.dataFormat = URLLoaderDataFormat.BINARY;
                loader.load(req);
                loader.addEventListener(Event.COMPLETE, completeHandler);
                
        }
        
        private function completeHandler(evt:Event):void {
            trace(evt.target.data);
        }
        
        private function addFilterHandler(evt:MouseEvent):void {
            var filtersArr:Array = new Array();
            filtersArr = _loader.filters;
            filtersArr.push(getBitmapFilter());
            _loader.filters = filtersArr;
        }
        
        private function removeFilterHandler(evt:MouseEvent):void {
            _loader.filters = null;
        }
        
        private function getBitmapFilter():GlowFilter {
            var color:Number = 0xFF0000;
            var alpha:Number = 1;
            var blurX:Number = 5;
            var blurY:Number = 5;
            var strength:Number = 4;
            var inner:Boolean = false;
            var knockout:Boolean = false;
            var quality:Number = BitmapFilterQuality.LOW;
            
            return new GlowFilter(color, alpha, blurX, blurY, strength, quality, inner, knockout);
        }
        
    }
    
}

后台php的代码：

<?php
    $filename="teststream.jpg";//要生成的图片名字
     
    $xmlstr =  $GLOBALS[HTTP_RAW_POST_DATA];
    if(empty($xmlstr)) {
        $xmlstr = file_get_contents('php://input');
    }
     
    $jpg = $xmlstr;//得到post过来的二进制原始数据
    $file = fopen("image/".$filename,"w");//打开文件准备写入
    fwrite($file,$jpg);//写入
    fclose($file);//关闭
    
    echo "ok~~~";
?>

运行后，可以在相应的目录中看到图片已经上传成功了，如下图所示：

以下说明转载至<as3传byteArray，php接二进制文件>

PHP默认只识别application/x-www.form-urlencoded标准的数据类型。

因此，对型如text/xml 或者 soap 或者 application/octet-stream 之类的内容无法解析，如果用$_POST数组来接收就会失败！
故保留原型，交给$GLOBALS['HTTP_RAW_POST_DATA'] 来接收。

另外还有一项 php://input 也可以实现此这个功能

php://input 允许读取 POST 的原始数据。和 $HTTP_RAW_POST_DATA 比起来，它给内存带来的压力较小，并且不需要任何特殊的 php.ini 设置。php://input和 $HTTP_RAW_POST_DATA 不能用于 enctype=”multipart/form-data”。’

而在前台则使用JPGEncoder或是PNGEncoder将BitmapData转成二进制，使用post传给php

二、使用字符串提交（采用Base64编码）

as3代码：

package  
{
    import com.adobe.images.JPGEncoder;
    import com.adobe.images.PNGEncoder;
    import com.hurlant.util.Base64;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Loader;
    import flash.display.MovieClip;
    import flash.display.Shape;
    import flash.display.Sprite;
    import flash.events.Event;
    import fl.controls.Button;
    import flash.events.MouseEvent;
    import flash.filters.GlowFilter;
    import flash.net.*;
    import flash.filters.BitmapFilterQuality;
    import flash.utils.ByteArray;
    
    /**
     * ...
     * @author ZhangYi
     */
    public class Base64Test extends Sprite
    {
        private var _base:Shape;
        private var _btn:Button;
        private var _loader:Loader;
        
        public function Base64Test() 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }
        
        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);
            // entry point
            
            inited();
        }
        
        private function inited():void {
            var mc:MovieClip = new MovieClip();
                mc.graphics.beginFill(0x000000, 0.2);
                mc.graphics.drawRect(0, 0, 320, 455);
                mc.x = 30;
                mc.y = 60;
            
            addChild(mc);
            
            _loader = new Loader();
            _loader.load(new URLRequest("../assets/1.png"));
            mc.addChild(_loader);
            
            _loader.addEventListener(MouseEvent.ROLL_OVER, addFilterHandler);
            _loader.addEventListener(MouseEvent.ROLL_OUT, removeFilterHandler);
            
            _btn = new Button();
            _btn.label = "截图";
            _btn.x = 30;
            _btn.y = 30;
            addChild(_btn);
            
            _btn.addEventListener(MouseEvent.CLICK, clickHandler);
        }
        
        private function clickHandler(evt:MouseEvent):void {
            addFilterHandler();
            
            var bitmapData:BitmapData = new BitmapData(_loader.width, _loader.height, true, 0);
                bitmapData.draw(_loader);
            
            var bytes:ByteArray = PNGEncoder.encode(bitmapData);
            var pngString:String = Base64.encodeByteArray(bytes);
            
            var variables:URLVariables = new URLVariables(); 
                variables.png = pngString;
                variables.name = "photo002";
                
            var req:URLRequest = new URLRequest("http://meteoric.com/test/uploadFile/upload_2.php");
                req.data = variables;
                req.method = URLRequestMethod.POST;
            
            var urlloader:URLLoader = new URLLoader();
                urlloader.dataFormat = URLLoaderDataFormat.VARIABLES;
                urlloader.addEventListener(Event.COMPLETE, completeHandler);
                urlloader.load(req);
                
            trace(pngString);
        }
        
        private function completeHandler(evt:Event):void {
            trace(evt.target.data);
        }
        
        private function addFilterHandler(evt:MouseEvent=null):void {
            var filtersArr:Array = new Array();
            filtersArr = _loader.filters;
            filtersArr.push(getBitmapFilter());
            _loader.filters = filtersArr;
        }
        
        private function removeFilterHandler(evt:MouseEvent):void {
            _loader.filters = null;
        }
        
        private function getBitmapFilter():GlowFilter {
            var color:Number = 0xFF0000;
            var alpha:Number = 1;
            var blurX:Number = 5;
            var blurY:Number = 5;
            var strength:Number = 4;
            var inner:Boolean = false;
            var knockout:Boolean = false;
            var quality:Number = BitmapFilterQuality.LOW;
            
            return new GlowFilter(color, alpha, blurX, blurY, strength, quality, inner, knockout);
        }
    }

}

后台php代码：

<?php
function base64_to_png($inputfile, $outputfile ) {
    $imageData = $inputfile;
    $file = fopen( $outputfile, "w" );
    fwrite( $file, base64_decode( $imageData ) );
    fclose($file);
}
base64_to_png("".$_POST['png'], "image/". $_POST["name"] . ".png");

print "info=ok!!";
?>

控制台上可以看到将bitmapdata转为字符串的结果：

后台保存得到的图片：

三、使用FileReference类进行上传

as3代码：

package  
{
    import fl.controls.Button;
    import flash.display.Loader;
    import flash.display.Sprite;
    import flash.events.DataEvent;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.filters.BevelFilter;
    import flash.net.FileFilter;
    import flash.net.FileReference;
    import flash.net.URLRequest;
    import flash.utils.ByteArray;
    
    /**
     * ...
     * @author ZhangYi
     */
    public class FileReferenceUpload extends Sprite
    {
        private var _btn:Button;
        private var _fileRef:FileReference;
        private var _loader:Loader;
        
        public function FileReferenceUpload() 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }
        
        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);
            // entry point
            
            inited();
        }
        
        private function inited():void {
            _btn = new Button();
            _btn.label = "选择图片";
            _btn.x = 100;
            _btn.y = 100;
            addChild(_btn);
            
            _btn.addEventListener(MouseEvent.CLICK, clickHandler);
            
            _loader = new Loader();
            _loader.x = 100;
            _loader.y = 150;
            addChild(_loader);
            
            _loader.contentLoaderInfo.addEventListener(Event.COMPLETE, resizeImage);
        }
        
        private function resizeImage(evt:Event):void {
            var size:uint = 300;
            
            var w:Number = _loader.width;
            var h:Number = _loader.height;
            
            var scale:Number = w / h;
            
            if (w > h) {
                _loader.width = size;
                _loader.height = size / scale;
            } else if (h > w) {
                _loader.height = size;
                _loader.width = size * scale;
            } else {
                _loader.height = _loader.width = size;
            }
            
            var req:URLRequest = new URLRequest("http://meteoric.com/test/uploadFile/upload_3.php");
            
            
            _fileRef.upload(req);
        }
        
        private function getImageFilter():FileFilter {
            return new FileFilter("支持的图片类型(*.jpg;*.jpeg;*.gif;*.png)", "*.jpg;*.jpeg;*.gif;*.png");
        }
        
        private function getFilterTypes():Array {
            return [
                getImageFilter(),
                new FileFilter("GIF 文件 (*.gif)", "*.gif"),
                new FileFilter("PNG 文件 (*.png)", "*.png"),
                new FileFilter("JPG 文件 (*.jpg)", "*.jpg;*.jpeg")
            ];
        }
        
        private function clickHandler(evt:MouseEvent):void {
            _fileRef = null;
            
            _fileRef = new FileReference();
            _fileRef.addEventListener(Event.SELECT, selectHandler, false, 0, true);
            _fileRef.addEventListener(Event.COMPLETE, onloadedHandler, false, 0, true);
            _fileRef.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA, uploadImageCompleteHandler, false, 0, true);
            
            _fileRef.browse(getFilterTypes());
        }
        
        private function selectHandler(evt:Event):void {
            _fileRef.removeEventListener(Event.SELECT, selectHandler);
            
            _fileRef.load();
        }
        
        private function onloadedHandler(evt:Event):void {
            _fileRef.removeEventListener(Event.COMPLETE, onloadedHandler);
            
            _loader.loadBytes(_fileRef.data);
        }
        
        private function uploadImageCompleteHandler(evt:DataEvent):void {
            trace(evt.data);
            
            _fileRef.removeEventListener(DataEvent.UPLOAD_COMPLETE_DATA, uploadImageCompleteHandler);
            
            _fileRef = null;
        }
    }

}

后台php代码：

<?php
if ($_FILES ["Filedata"] ["error"] > 0) {
    exit("Error: " . $_FILES ["Filedata"]["error"]);
}
 
$fileName = iconv("utf-8","gb2312", $_FILES ["Filedata"]["name"]);
$reallyName = "image/".$fileName;
 
if (file_exists ($reallyName)) {
    unlink($reallyName);
} 

     
     if (!is_dir("upload")) {
         mkdir("upload");
     }
  
   move_uploaded_file( $_FILES ["Filedata"]["tmp_name"],  $reallyName);
   echo "Stored in: " . "image/" . $fileName;
  
?>

 

程序运行后的效果(对预览图片进行了等比压缩处理，可以在列出的图中看出原图很大)：

以上三种方式，在不同的场景下面可能应用不太一样，比如第二种，使用编码后的字符串方式进行传输的，这样就可以通过socket通道传输数据了（虽然这很浪费而且耗费带宽，环境允许的话还是应该优先考虑使用web接口进行处理）。针对不同的上传方式，后台处理各不一样，可以看到上面的三个php写的都不一样。

在Flex中，可以使用内置的一些类、方法将bitmapdata转化为字符串，在线例子：converting-an-imagesnapshot-object-into-a-base-64-encoded-string-in-flex-3

用到的类也比较简单(ImageSnapshot中的encodeImageAsBase64、captureImage)：

private function getBase64StringFromBody():String 
{
            var _matrix:Matrix = new Matrix(1,0,0,1,0,0);
                _matrix.scale(1,1);
            
            var bitmapData:BitmapData = new BitmapData(320,455,true,0);
            bitmapData.draw(photoEditContainer, _matrix);
            
            var bt:Bitmap = new Bitmap(bitmapData,"auto",true);
            
            var tempCan:Canvas = new Canvas();
            tempCan.rawChildren.addChild(bt);
            
            _matrix = new Matrix(1,0,0,1,0,0);
            bitmapData = new BitmapData(320,455,true,0);
            bitmapData.draw(tempCan,_matrix);
            
            var codeStr:String = ImageSnapshot.encodeImageAsBase64( ImageSnapshot.captureImage( bitmapData ) );
            tempCan.rawChildren.removeChild(bt);
            bitmapData.dispose();
            bitmapData = null
            return codeStr;
}

提供本文中所有as3的源代码下载，后台可以用自己熟悉的任何一门语言写写就好：java、.net、python或是其它…