图像被扭曲的某个时候在上传 [英] Image gets distorted sometime while uploading

问题描述

我使用的 MIME多作为上传图片到服务器。有时图像失真。如何解决这个问题？
注：扭曲的手段，一些像素已丢失。
我使用以下code上传：

I am using MIME multipart for uploading images to server. Sometime image get distorted. How to resolve this issue? Note: Distorted means, some pixels are lost. I am using following code for uploading:

File file = new File(filePath[0]);
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost("serverurl");

MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
entity.addPart("Content-Type",new StringBody("multipart/form-data;charset=utf-8"));
entity.addPart("Content-Length", new StringBody(String.valueOf(file.length())));
entity.addPart("UploadContentPostD", new FileBody(file));                   
entity.addPart("DocumentName", new StringBody(file.getName()));

httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost,localContext);
BufferedReader reader = new BufferedReader(new    InputStreamReader(response.getEntity().getContent(), "UTF-8"));

扭曲形象是：

Distorted image is:

推荐答案

我使用 Apache的百科全书上传这里是我上传的code这每一次的作品完美...

I use Apache Commons for upload and here is my upload code which works perfectly every time...

public Integer uploadByteArray(String remoteFilename, byte[] bitmapdata){       
        HttpClient client = new HttpClient();
        PostMethod filePost = new PostMethod( URL_PATH);

        Integer ret = null;

        try {           
            Part[] parts = new Part[2];
            parts[0] = new StringPart("file_name" ,remoteFilename);

            ByteArrayPartSource ps = new ByteArrayPartSource("file", bitmapdata);
            parts[1] = new FilePart("file", ps);

            filePost.setRequestEntity(new MultipartRequestEntity(parts,
                    filePost.getParams()));

        } catch (Exception e) {
            Log.d(TAG, e.toString());
        }

        try {
            ret = client.executeMethod(filePost);
            Log.d(TAG, "statusCode>>>" + ret);
            if(ret != 200){
                Log.d(TAG, "Error:" + ret + " from server. Please try again later.");
            }else{
                responseBody = filePost.getResponseBodyAsString();
                Log.d(TAG, filePost.getResponseBodyAsString());
            }
        } catch (Exception e) {
            Log.d(TAG, e.toString());
        }

        filePost.releaseConnection();

        return ret;
    }

如果您继续看到您的问题反复出现，我会在你的服务器上，并发送回值在响应，并将其与您已发送了文件的本地MD5文件使用MD5。如果他们不一样，你就知道出事了。

If you continue to see your problem recurring, I would use MD5 on the file you get on the server and send that value back in the response and compare it to a local MD5 of the file you've sent up. If they're not the same, you know something went wrong.

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