SWFUpload的跨域请求处理
最近工作中遇到这样一个问题，有两组服务器，比如one.abc.com和two.abc.com，程序部署在one服务器上，需要实现的功能是：
通过访问程序上传图片到two服务器，之前没有做过类似的功能，上网查了下资料，发现SWFUpload组件，
经过查资料和自己查看源代码，实现了这个功能，以下是我这次的总结。
首先将程序分别部署到one和tow服务器上。
前台index.jsp代码（注意将upload_url和flash_url路径修改为你要上传图片的服务器地址 ）ps：form中的action路径没用着
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<link href="<%=basePath%>css/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="<%=basePath%>js/swfupload/swfupload.js"></script>
<script type="text/javascript" src="<%=basePath%>js/swfupload/swfupload.queue.js"></script>
<script type="text/javascript" src="<%=basePath%>js/swfupload/fileprogress.js"></script>
<script type="text/javascript" src="<%=basePath%>js/swfupload/handlers.js"></script>
<script type="text/javascript">
var upload1, upload2;
window.onload = function() {
upload1 = new SWFUpload({
//提交路径
upload_url: "http://two.abc.com/struts2-ibatis/upload.do",//上传图片的服务器
//向后台传递额外的参数
post_params: {"name" : "kaobian"},
//上传文件的名称
file_post_name: "file",
// 下面自己按照字面意思理解
file_size_limit : "102400", // 100MB
file_types : "*.*",
file_types_description : "All Files",
file_upload_limit : "10",
file_queue_limit : "0",
// 事件处理
file_dialog_start_handler : fileDialogStart,
file_queued_handler : fileQueued,
file_queue_error_handler : fileQueueError,
file_dialog_complete_handler : fileDialogComplete,
upload_start_handler : uploadStart,
upload_progress_handler : uploadProgress,
upload_error_handler : uploadError,
upload_success_handler : uploadSuccess,
upload_complete_handler : uploadComplete,
// 按钮的处理
button_image_url : "images/XPButtonUploadText_61x22.png",
button_placeholder_id : "spanButtonPlaceholder1",
button_width: 61,
button_height: 22,
// Flash Settings swf文件的路径，需要修改为two服务器的地址
flash_url : "http://two.abc.com/struts2-ibatis/js/swfupload/swfupload.swf",
custom_settings : {
progressTarget : "fsUploadProgress1",
cancelButtonId : "btnCancel1",
progressStrid : "strid"
},
// Debug Settings
debug: false
});
}
</script>
</head>
<body>
<div id="content">
<form action="http://fxb.abc.com:8080/struts2-ibatis/swfUoload.do" method="post" name="thisform" enctype="multipart/form-data">
<table>
<tr valign="top">
<td>
<input type="text" name="str" id="strid" value=""/>
<div>
<div class="fieldset flash" id="fsUploadProgress1">
<span class="legend">文件上传</span>
</div>
<div style="padding-left: 5px;">
<span id="spanButtonPlaceholder1"></span>
<input id="btnCancel1" type="button" value="Cancel Uploads" onclick="cancelQueue(upload1);" disabled="disabled" style="margin-left: 2px; height: 22px; font-size: 8pt;" />
<br />
</div>
</div>
</td>
</tr>
</table>
</form>
</div>
</body>
</html>
action处理代码如下（注意action中的File名字也就是file要跟前台jsp中的file_post_name一致 ）
package com.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import org.apache.struts2.ServletActionContext;
import org.json.JSONObject;
import com.opensymphony.xwork2.ActionSupport;
public class PictureAction extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1L;
private File file;
private String fileFileName;
private String fileContentType;
private String name;
public String execute() throws Exception {
// 实现上传
InputStream is = new FileInputStream(file);
String rootPath = this.getClass().getClassLoader().getResource("/")
.getPath();
rootPath = rootPath.substring(0, rootPath.indexOf("/WEB-INF/classes"));
File deskFile = new File(rootPath+"/upload/", this.getFileFileName());
OutputStream os = new FileOutputStream(deskFile);
byte[] bytefer = new byte[1024];
int length = 0;
while ((length = is.read(bytefer)) != -1) {
os.write(bytefer, 0, length);
}
name = "顾小白";
os.close();
is.close();
// 建立一个根对象
JSONObject root = new JSONObject();
root.put("id", "123");
root.put("title", "顾小白");
PrintWriter out = ServletActionContext.getResponse().getWriter();
out.print(root);
out.close();
return "success";
}
public File getFile() {
return file;
}
public void setFile(File file) {
this.file = file;
}
public String getFileFileName() {
return fileFileName;
}
public void setFileFileName(String fileFileName) {
this.fileFileName = fileFileName;
}
public String getFileContentType() {
return fileContentType;
}
public void setFileContentType(String fileContentType) {
this.fileContentType = fileContentType;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
配置文件如下（注意如果要返回json数据格式需要表明返回类型 ）
<action name="upload" class="com.action.PictureAction"> <result name="success" type="json"/> <result name="input">/index.jsp</result> </action>
最后是在handlers.js中的uploadSuccess方法接收你返回的数据（如我返回的是json格式）
function uploadSuccess(file, serverData) {
try {
var progress = new FileProgress(file, this.customSettings.progressTarget);
progress.setComplete();
document.getElementById(this.customSettings.progressStrid).value=serverData;
var data=eval("("+serverData+")");
alert(data["title"]);
progress.setStatus("Complete.");
progress.toggleCancel(false);
} catch (ex) {
this.debug(ex);
}
}
数据有了，要怎么处理就看你的需求了o(∩_∩)o
我是这样实现的，欢迎大家一起讨论。