处理程序.基于ExtJs的TinyMCE文件和图像管理器插件

我使用的是Rahul Singla开发的ExtJsFileManagerhttp://www.rahulsingla.com/blog/2011/05/extjsfilemanager-extjs-based-file-and-image-manager-plugin-for-tinymce

这里有Php和c#的例子，并有文件处理程序。我在我的项目中使用Java SpringSource，我是这些技术的新手。我已经尝试过将c#转换为Java，但我不完全理解c#返回给客户端的内容。

下面是c#代码

<%@ WebHandler Language="C#" Class="BrowserHandler" %>
using System;
using System.Web;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security;
using MyCompany;
public class BrowserHandler : IHttpHandler
{
#region Private Members
private HttpContext context;
#endregion
#region IHttpHandler Methods
public void ProcessRequest (HttpContext context)
{
    this.context = context;
    string op=context.Request["op"];
    string path=this.context.Request["path"];
    context.Response.ContentType = "text/javascript";
    //These are extra parameters you can pass to the server in each request by specifying extjsfilemanager_extraparams option in init.
    string param1=context.Request["param1"];
    string param2=context.Request["param2"];
    switch (op)
    {
        case "getFolders":
            this.getFolders(path);
            break;
        case "getFiles":
            this.getFiles(path);
            break;
        case "createFolder":
            this.createFolder(path);
            break;
        case "uploadFiles":
            this.uploadFiles(path);
            break;
    }
}
public bool IsReusable
{
    get
    {
        return false;
    }
}
#endregion
#region Private Methods
private void getFolders (string path)
{
    path = this.validatePath(path);
    List<object> l=new List<object>();
    foreach (string dir in Directory.GetDirectories(path))
    {
        l.Add(new
        {
            text = Path.GetFileName(dir),
            path = dir,
            leaf = false,
            singleClickExpand = true
        });
    }
    this.context.Response.Write(Globals.serializer.Serialize(l));
}
private void getFiles (string path)
{
    path = this.validatePath(path);
    List<object> l=new List<object>();
    foreach (string file in Directory.GetFiles(path))
    {
        l.Add(new
        {
            text = Path.GetFileName(file),
            virtualPath = Globals.resolveUrl(Globals.resolveVirtual(file))
        });
    }
    this.context.Response.Write(Globals.serializer.Serialize(l));
}
private void createFolder (string path)
{
    path = this.validatePath(path);
    string name=this.context.Request["name"];
    Directory.CreateDirectory(Path.Combine(path, name));
    this.context.Response.Write(Globals.serializer.Serialize(new object()));
}
private void uploadFiles (string path)
{
    context.Response.ContentType = "text/html";
    path = this.validatePath(path);
    string successFiles="";
    string errorFiles="";
    for (int i=0; i < this.context.Request.Files.Count; i++)
    {
        HttpPostedFile file=this.context.Request.Files[i];
        if (file.ContentLength > 0)
        {
            string fileName=file.FileName;
            string extension=Path.GetExtension(fileName);
            //Remove .
            if (extension.Length > 0) extension = extension.Substring(1);
            if (Config.allowedUploadExtensions.Contains(extension, StringComparer.InvariantCultureIgnoreCase))
            {
                file.SaveAs(Path.Combine(path, fileName));
            }
            else
            {
                errorFiles += string.Format("Extension for {0} is not allowed.<br />", fileName);
            }
        }
    }
    string s=Globals.serializer.Serialize(new
    {
        success = true,
        successFiles,
        errorFiles
    });
    byte[] b=this.context.Response.ContentEncoding.GetBytes(s);
    this.context.Response.AddHeader("Content-Length", b.Length.ToString());
    this.context.Response.BinaryWrite(b);
    try
    {
        this.context.Response.Flush();
        this.context.Response.End();
        this.context.Response.Close();
    }
    catch (Exception) { }
}
private string validatePath (string path)
{
    if (string.IsNullOrEmpty(path))
    {
        path = Config.baseUploadDirPhysical;
    }
    if (!path.StartsWith(Config.baseUploadDirPhysical, StringComparison.InvariantCultureIgnoreCase) || (path.IndexOf("..") != -1))
    {
        throw new SecurityException("Invalid path.");
    }
    return (path);
}
#endregion}

这是我的代码

@RequestMapping(value = "/filehandler", method = RequestMethod.POST)
public @ResponseBody byte[] filehandler(HttpServletRequest request, HttpServletResponse response) {
    String op = request.getParameter("op");
    String path = uploadDataFolder; // || request.getParameter("path");
    String jsondata = "{root:";
    String datastr = "";
    File folder = new File(path);
    if (op.equals( "getFolders")){
        // FOLDERS
        for (File fileEntry : folder.listFiles() ) {
            //File fileEntry;
            if (fileEntry.isDirectory()) {
                datastr += "{'"text'":'"" + fileEntry.getName() +
                            "'",'"path'":'"" + fileEntry.getPath() +
                            "'",'"leaf'":'"false'"" +
                            ",'"singleClickExpand'":'"true'"}";
            }
        }
    }
    else if (op == "getFiles"){
        // FILES
        for (File fileEntry : folder.listFiles()) {
            //File fileEntry;
            if (fileEntry.isFile()) {
                datastr += "{'"text'":'"" + fileEntry.getName() +
                            "'",'"virtualPath'":'"" + fileEntry.getPath() + "'"";
            } else {
                System.out.println(fileEntry.getName());
            }
        }
    }
    else if (op == "createFolder"){
        // create folder function is not supported in our project
    }
    else if (op == "uploadFiles"){
        // upload images
        request.getAttribute("Files");
    }
    datastr = datastr.equals("") ? "null" :  "[" + datastr + "]";
    jsondata += datastr + "}";
    return getBytes(jsondata);
}

对于getFolders操作，它返回JSON数据，如

{root:[{"text":"blog","path":"C:'workspace'.metadata'.plugins'org.eclipse.wst.server.core'tmp0'wtpwebapps'NetaCommerceFrameworkAdmin'META-INF'static'images'blog","leaf":"false","singleClickExpand":"true"}{"text":"photos","path":"C:'workspace'.metadata'.plugins'org.eclipse.wst.server.core'tmp0'wtpwebapps'NetaCommerceFrameworkAdmin'META-INF'static'images'photos","leaf":"false","singleClickExpand":"true"}]}

我不知道c#代码返回什么，所以我不能用Java写它。它不允许我的JSON返回操作"getFolders"