好的。这绝对似乎是 Mac OSX 的问题。出于某种原因,OSX 中 File.upload() 方法创建的 HTTP 标头会导致外部服务器崩溃,并出现 301 Move Permanently。这不会在 Windows 中发生。当然,就 AIR 编译器而言,除了 HTTP 2xx 响应之外的任何响应都会导致 I/O 错误。因此,为了解决文件上传问题,我们必须手动创建负责上传本身的 HTTP 标头。我建议在解决此问题之前不要使用File.upload()
(或FileReference.upload()
就此而言)。
为此,我们上传的文件必须转换为 ByteArray。因此我只会使用 File/FileReference 来捕获文件。对于实际上传,文件必须转换为ByteArray
.
在我上面的例子中,它非常简单:
import flash.net.*
import flash.utils.ByteArray;
var xml:XML = new XML(<items><item>one</item><item>two</item></items>);
var data:ByteArray = new ByteArray();
data.writeUTF(xml.toXMLString());
现在就创建手动 HTTP 标头而言,归功于 Jonathan Marston ( http://marstonstudio.com/2007/10/19/how-to-take-a-snapshot-of-a-flash-movie-and-automatically -upload-the-jpg-to-a-server-in-three-easy-steps/)和他漂亮的UploadPostHelper
课程:
package {
import flash.events.*;
import flash.net.*;
import flash.utils.ByteArray;
import flash.utils.Endian;
/**
* Take a fileName, byteArray, and parameters object as input and return ByteArray post data suitable for a UrlRequest as output
*
* @see http://marstonstudio.com/?p=36
* @see http://www.w3.org/TR/html4/interact/forms.html
* @see http://www.jooce.com/blog/?p=143
* @see http://www.jooce.com/blog/wp%2Dcontent/uploads/2007/06/uploadFile.txt
* @see http://blog.je2050.de/2006/05/01/save-bytearray-to-file-with-php/
*
* @author Jonathan Marston
* @version 2007.08.19
*
* This work is licensed under a Creative Commons Attribution NonCommercial ShareAlike 3.0 License.
* @see http://creativecommons.org/licenses/by-nc-sa/3.0/
*
*/
public class UploadPostHelper {
/**
* Boundary used to break up different parts of the http POST body
*/
private static var _boundary:String = "";
/**
* Get the boundary for the post.
* Must be passed as part of the contentType of the UrlRequest
*/
public static function getBoundary():String {
if(_boundary.length == 0) {
for (var i:int = 0; i < 0x20; i++ ) {
_boundary += String.fromCharCode( int( 97 + Math.random() * 25 ) );
}
}
return _boundary;
}
/**
* Create post data to send in a UrlRequest
*/
public static function getPostData(fileName:String, byteArray:ByteArray, parameters:Object = null):ByteArray {
var i: int;
var bytes:String;
var postData:ByteArray = new ByteArray();
postData.endian = Endian.BIG_ENDIAN;
//add Filename to parameters
if(parameters == null) {
parameters = new Object();
}
parameters.Filename = fileName;
//add parameters to postData
for(var name:String in parameters) {
postData = BOUNDARY(postData);
postData = LINEBREAK(postData);
bytes = 'Content-Disposition: form-data; name="' + name + '"';
for ( i = 0; i < bytes.length; i++ ) {
postData.writeByte( bytes.charCodeAt(i) );
}
postData = LINEBREAK(postData);
postData = LINEBREAK(postData);
postData.writeUTFBytes(parameters[name]);
postData = LINEBREAK(postData);
}
//add Filedata to postData
postData = BOUNDARY(postData);
postData = LINEBREAK(postData);
bytes = 'Content-Disposition: form-data; name="Filedata"; filename="';
for ( i = 0; i < bytes.length; i++ ) {
postData.writeByte( bytes.charCodeAt(i) );
}
postData.writeUTFBytes(fileName);
postData = QUOTATIONMARK(postData);
postData = LINEBREAK(postData);
bytes = 'Content-Type: application/octet-stream';
for ( i = 0; i < bytes.length; i++ ) {
postData.writeByte( bytes.charCodeAt(i) );
}
postData = LINEBREAK(postData);
postData = LINEBREAK(postData);
postData.writeBytes(byteArray, 0, byteArray.length);
postData = LINEBREAK(postData);
//add upload filed to postData
postData = LINEBREAK(postData);
postData = BOUNDARY(postData);
postData = LINEBREAK(postData);
bytes = 'Content-Disposition: form-data; name="Upload"';
for ( i = 0; i < bytes.length; i++ ) {
postData.writeByte( bytes.charCodeAt(i) );
}
postData = LINEBREAK(postData);
postData = LINEBREAK(postData);
bytes = 'Submit Query';
for ( i = 0; i < bytes.length; i++ ) {
postData.writeByte( bytes.charCodeAt(i) );
}
postData = LINEBREAK(postData);
//closing boundary
postData = BOUNDARY(postData);
postData = DOUBLEDASH(postData);
return postData;
}
/**
* Add a boundary to the PostData with leading doubledash
*/
private static function BOUNDARY(p:ByteArray):ByteArray {
var l:int = UploadPostHelper.getBoundary().length;
p = DOUBLEDASH(p);
for (var i:int = 0; i < l; i++ ) {
p.writeByte( _boundary.charCodeAt( i ) );
}
return p;
}
/**
* Add one linebreak
*/
private static function LINEBREAK(p:ByteArray):ByteArray {
p.writeShort(0x0d0a);
return p;
}
/**
* Add quotation mark
*/
private static function QUOTATIONMARK(p:ByteArray):ByteArray {
p.writeByte(0x22);
return p;
}
/**
* Add Double Dash
*/
private static function DOUBLEDASH(p:ByteArray):ByteArray {
p.writeShort(0x2d2d);
return p;
}
}
}
现在,我们利用类来创建我们的 HTTP 标头,使用 good old URLRequest
:
var req:URLRequest = new URLRequest();
req.url = //server-side url (.php)
req.contentType = "multipart/form-data; boundary=" + UploadPostHelper.getBoundary();
req.method = URLRequestMethod.POST;
//Be sure to place the actual file name with its extension as the file name. Set the second argument as the ByteArray created earlier. Any other parameters (name-value pairs) can be added via an optional third parameter (see class above)
req.data = UploadPostHelper.getPostData("test.xml", data);
req.requestHeaders.push(new URLRequestHeader("Cache-Control", "no-cache"));
现在不要使用File.upload()
来完成请求,只需使用URLLoader
:
var loader:URLLoader = new URLLoader();
//We have to load the data as binary as well
loader.dataFormat = URLLoaderDataFormat.BINARY;
loader.addEventListener(Event.COMPLETE, complete);
loader.addEventListener(IOErrorEvent.IO_ERROR, ioerror);
loader.addEventListener(SecurityErrorEvent.SECURITY_ERROR, secerror);
loader.load(req);
//Event handlers
function complete(e:Event):void {
var ba:ByteArray = e.target.data;
//Returns the XML data
trace(ba.readUTF());
}
function ioerror(e:IOErrorEvent):void {}
function secerror(e:SecurityErrorEvent):void {}
一切都应该很好地工作。就服务器端而言,文件名由上面的类定义为Filedata
. 用于捕获文件的简单 PHP 脚本如下所示:
<?php
echo file_get_contents($_FILES['Filedata']['tmp_name']);
var_dump($_FILES['Filedata']);
/*
array(1) {
["Filedata"]=>array(5) {
["name"]=>string(8) "test.xml"
["type"]=>string(24) "application/octet-stream"
["tmp_name"]=>string(38) "root/tmp/php2jk8yk"
["error"]=>int(0)
["size"]=>int(58)
}
}
*/
?>