kindeditor修改图片上传路径-使用webapi上传图片到图片服务器

kindeditor是一个非常好用的富文本编辑器，它的简单使用我就不再介绍了。 在这里我着重介绍一些使用kindeditor修改图片上传路径并通过webapi上传图片到图片服务器的方案。

因为我使用的开发语言是C#&ASP.NET MVC。所以首先需要在项目中引用LitJSON.dll，如下图：

我们修改上传文件：upload_json.ashx

<%@ WebHandler Language="C#" Class="Upload" %>

/**
 * KindEditor ASP.NET
 *
 * 本ASP.NET程序是演示程序，建议不要直接在实际项目中使用。
 * 如果您确定直接使用本程序，使用之前请仔细确认相关安全设置。
 *
 */

using System;
using System.Collections;
using System.Web;
using System.IO;
using System.Globalization;
using LitJson;

public class Upload : IHttpHandler
{
    private HttpContext context;

    public void ProcessRequest(HttpContext context)
    {
        //定义允许上传的文件扩展名
        Hashtable extTable = new Hashtable();
        extTable.Add("image", "gif,jpg,jpeg,png,bmp");
        extTable.Add("flash", "swf,flv");
        extTable.Add("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
        extTable.Add("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");
        //最大文件大小
        ;
        this.context = context;

        HttpPostedFile imgFile = context.Request.Files["imgFile"];
        if (imgFile == null)
        {
            showError("请选择文件。");
        }
        //文件类型
        String dirName = context.Request.QueryString["dir"];
        if (String.IsNullOrEmpty(dirName))
        {
            dirName = "image";
        }
        if (!extTable.ContainsKey(dirName))
        {
            showError("目录名不正确。");
        }
        String fileName = imgFile.FileName;
        String fileExt = Path.GetExtension(fileName).ToLower();

        if (imgFile.InputStream == null || imgFile.InputStream.Length > maxSize)
        {
            showError("上传文件大小超过限制。");
        }

        ).ToLower()) == -)
        {
            showError("上传文件扩展名是不允许的扩展名。\n只允许" + ((String)extTable[dirName]) + "格式。");
        }
        var saveDir = context.Request["saveDir"];
        string saveDirStr = null;
        if (saveDir == null)
        {
            saveDirStr = "tmp";
        }
        else
        {
            saveDirStr = saveDir.ToString();
        }
        //是否分布式上传
        bool isDFS = false;
        var dfs = context.Request["dfs"];
        ")
        {
            isDFS = true;
        }
        Hashtable hash = new Hashtable();
        if (isDFS)
        {
            var imageUrl = Cloud.Utility.ConfigHelper.Images_SITE_URL;
            var client = new RestSharp.RestClient(imageUrl);//TODO api基路径
            var request = new RestSharp.RestRequest("file/upload", RestSharp.Method.POST);
            request.AlwaysMultipartFormData = true;
            request.AddHeader("dir", dirName + "/" + saveDirStr);
            request.AddHeader("imageUrl", imageUrl);
            request.AddFile("file", Cloud.Utility.StreamHelper.ConvertToBytes(imgFile.InputStream), context.Server.HtmlEncode(imgFile.FileName));

            var posttask = client.ExecutePostTaskAsync(request);
            if (posttask.Result.StatusCode == System.Net.HttpStatusCode.OK)
            {
                var url = posttask.Result.Content.Trim(new char[] { '[', ']', '"' });
                hash["url"] = url;
            }
            else
            {
                showError("分布式上传失败");
            }
        }
        else
        {
            //文件保存目录
            string savePath = "/upload/kindeditor/" + dirName + "/" + saveDirStr;
            String dirPath = context.Server.MapPath(savePath);
            if (!Directory.Exists(dirPath))
            {
                Directory.CreateDirectory(dirPath);
            }

            String newFileName = DateTime.Now.ToString("_yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
            String filePath = dirPath + "/" + newFileName;
            imgFile.SaveAs(filePath);
            hash["url"] = savePath + "/" + newFileName;
        }
        hash[;
        context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
        context.Response.Write(JsonMapper.ToJson(hash));
        context.Response.End();
    }

    private void showError(string message)
    {
        Hashtable hash = new Hashtable();
        hash[;
        hash["message"] = message;
        context.Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
        context.Response.Write(JsonMapper.ToJson(hash));
        context.Response.End();
    }

    public bool IsReusable
    {
        get
        {
            return true;
        }
    }
}

全部代码

客户端传过来一个文件保存目录的参数：saveDir

  var saveDir = context.Request["saveDir"];
        string saveDirStr = null;
        if (saveDir == null)
        {
            saveDirStr = "tmp";
        }
        else
        {
            saveDirStr = saveDir.ToString();
        }

客户端传过来一个是否上传文件到图片服务器的参数：dfs，如果dfs=1代表上传到图片服务器，否则上传到本地

    //是否分布式上传
        bool isDFS = false;
        var dfs = context.Request["dfs"];
        ")
        {
            isDFS = true;
        }

上传文件的核心代码：其中使用到了一个开源的上传组件RestSharp

 Hashtable hash = new Hashtable();
        if (isDFS)
        {
            var imageUrl = Cloud.Utility.ConfigHelper.Images_SITE_URL;
            var client = new RestSharp.RestClient(imageUrl);//TODO api基路径
            var request = new RestSharp.RestRequest("file/upload", RestSharp.Method.POST);
            request.AlwaysMultipartFormData = true;
            request.AddHeader("dir", dirName + "/" + saveDirStr);
            request.AddHeader("imageUrl", imageUrl);
            request.AddFile("file", Cloud.Utility.StreamHelper.ConvertToBytes(imgFile.InputStream), context.Server.HtmlEncode(imgFile.FileName));

            var posttask = client.ExecutePostTaskAsync(request);
            if (posttask.Result.StatusCode == System.Net.HttpStatusCode.OK)
            {
                var url = posttask.Result.Content.Trim(new char[] { '[', ']', '"' });
                hash["url"] = url;
            }
            else
            {
                showError("分布式上传失败");
            }
        }
        else
        {
            //文件保存目录
            string savePath = "/upload/kindeditor/" + dirName + "/" + saveDirStr;
            String dirPath = context.Server.MapPath(savePath);
            if (!Directory.Exists(dirPath))
            {
                Directory.CreateDirectory(dirPath);
            }

            String newFileName = DateTime.Now.ToString("_yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
            String filePath = dirPath + "/" + newFileName;
            imgFile.SaveAs(filePath);
            hash["url"] = savePath + "/" + newFileName;
        }

WebApi文件上传方法如下：

 [Route("file/upload")]
        [HttpPost]
        public async Task<HttpResponseMessage> PostFormData()
        {

            // Check if the request contains multipart/form-data.
            if (!Request.Content.IsMimeMultipartContent())
            {
                throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
            }
            var dir = Request.Headers.GetValues("dir").First();
            var imageUrl = Request.Headers.GetValues("imageUrl").First();

            string root = System.Web.HttpContext.Current.Server.MapPath(Path.Combine("~/images/", dir));

            if (System.IO.Directory.Exists(root) == false)
            {
                System.IO.Directory.CreateDirectory(root);
            }

            var provider = new MultipartFormDataStreamProvider(root);
            provider = new RenamingMultipartFormDataStreamProvider(root);//重命名写法

            await Request.Content.ReadAsMultipartAsync(provider);

            var urlList = new List<string>();
            var url = "";
            foreach (MultipartFileData file in provider.FileData)
            {
                string path = file.LocalFileName;
                var start = path.IndexOf("\\images");
                path = path.Substring(start);
                var mainURL = imageUrl;// ConfigurationManager.AppSettings["MainImageURL"];
                url = mainURL + path.Replace("\\", "/");
                urlList.Add(url);
                //return Request.CreateResponse(HttpStatusCode.OK, url);
            }

            return Request.CreateResponse(HttpStatusCode.OK, urlList);

        }

其中文件重命名方法为：

  /// <summary>
    /// 文件上传并重命名
    /// </summary>
    public class RenamingMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
    {
        public string Root { get; set; }

        public RenamingMultipartFormDataStreamProvider(string root)
            : base(root)
        {
            Root = root;
        }

        public override string GetLocalFileName(HttpContentHeaders headers)
        {
            string filePath = headers.ContentDisposition.FileName;

            // Multipart requests with the file name seem to always include quotes.
            if (filePath.StartsWith(@"""") && filePath.EndsWith(@""""))
                filePath = filePath.Substring(, filePath.Length - );
           return Path.GetFileNameWithoutExtension(filePath)+ DateTime.Now.ToString("_yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + Path.GetExtension(filePath).ToLower();
            return filePath;
        }

    }

mvc views文件kindeditor的配置如下：

 KindEditor.ready(function (K) {
        window.NewsContent = K.create("#Content", {
            cssPath: '/Content/kindeditor-4.1.10/plugins/code/prettify.css',
            uploadJson: '/Content/kindeditor-4.1.10/asp.net/upload_json.ashx?saveDir=news_content&dfs=0',
            fileManagerJson: '/Content/kindeditor-4.1.10/asp.net/file_manager_json.ashx',
            allowFileManager: true,
            afterCreate: function () {
                this.sync();
            },
            afterBlur: function () {
                this.sync();
            }
        });
        $(".ke-container").addClass("form-control");
    });

主要配置的是UploadJson参数：saveDir代表保存的目录，dfs代表是否上传到图片服务器。