Android允许多个文件上传(最大150 MB)到PHP服务器

我必须允许用户上传多个文件(可以是图像/视频/音频)在一个单一的请求从我的android应用程序到PHP服务器。我正在使用REST web服务。

对于这个功能，我使用以下代码:

/* To upload the multiple documents */
public void uploadFile() {
    String charset = "UTF-8";
    File[] uploadFileArray = new File[mediaList.size()];
    for (int i = 0; i < mediaList.size(); i++) {
        uploadFileArray[i] = new File(mediaList.get(i).getMediaPath());
    }
    try {
        MultipartUtility multipart = new MultipartUtility(upLoadServerUri, charset);
        for (int i = 0; i < mediaList.size(); i++) {
            if (isImage)) {
                multipart.addFilePart("image_doc[]", uploadFileArray[i]);
            } 
            else if (isVideo) {
                multipart.addFilePart("video_doc[]", uploadFileArray[i]);
            } 
            else if (isAudio) {
                multipart.addFilePart("audio_doc[]", uploadFileArray[i]);
            }
        }
        List<String> responseUploadDocument = multipart.finish();
        System.out.println("SERVER REPLIED:");
        for (String line : responseUploadDocument) {
            System.out.println(line);
            responseUploadDocumentString = line;
        }
        if (responseUploadDocumentString != null) {
            JSONObject jsonObj = new JSONObject(responseUploadDocumentString);
            statusUploadDoc = jsonObj.getString("status");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

我的MultipartUtility类如下:

public class MultipartUtility {
    private final String boundary;
    private static final String LINE_FEED = "'r'n";
    private HttpURLConnection httpConn;
    private String charset;
    private OutputStream outputStream;
    private PrintWriter writer;
    public MultipartUtility(String requestURL, String charset)
            throws IOException {
        this.charset = charset;
        boundary = "===" + System.currentTimeMillis() + "===";
        URL url = new URL(requestURL);
        httpConn = (HttpURLConnection) url.openConnection();
        ***httpConn.setChunkedStreamingMode(0);***
        httpConn.setUseCaches(false);
        httpConn.setDoOutput(true); // indicates POST method
        httpConn.setDoInput(true);
        httpConn.setRequestProperty("Content-Type",
                "multipart/form-data; boundary=" + boundary);
        httpConn.setRequestProperty("User-Agent", "CodeJava Agent");
        httpConn.setRequestProperty("Test", "Bonjour");
        outputStream = httpConn.getOutputStream();
        writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
                true);
    }
    public void addFormField(String name, String value) {
        writer.append("--" + boundary).append(LINE_FEED);
        writer.append("Content-Disposition: form-data; name='"" + name + "'"")
                .append(LINE_FEED);
        writer.append("Content-Type: text/plain; charset=" + charset).append(
                LINE_FEED);
        writer.append(LINE_FEED);
        writer.append(value).append(LINE_FEED);
        writer.flush();
    }
    public void addFilePart(String fieldName, File uploadFile)
            throws IOException {
        String fileName = uploadFile.getName();
        writer.append("--" + boundary).append(LINE_FEED);
        writer.append(
                "Content-Disposition: form-data; name='"" + fieldName
                        + "'"; filename='"" + fileName + "'"")
                .append(LINE_FEED);
        writer.append(
                "Content-Type: "
                        + URLConnection.guessContentTypeFromName(fileName))
                .append(LINE_FEED);
        writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
        writer.append(LINE_FEED);
        writer.flush();
        FileInputStream inputStream = new FileInputStream(uploadFile);
        byte[] buffer = new byte[4096];
        int bytesRead = -1;
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }
        outputStream.flush();
        inputStream.close();
        writer.append(LINE_FEED);
        writer.flush();
    }
    public void addHeaderField(String name, String value) {
        writer.append(name + ": " + value).append(LINE_FEED);
        writer.flush();
    }
    public List<String> finish() throws IOException {
        List<String> response = new ArrayList<String>();
        writer.append(LINE_FEED).flush();
        writer.append("--" + boundary + "--").append(LINE_FEED);
        writer.close();
        // checks server's status code first
        int status = httpConn.getResponseCode();
        if (status == HttpURLConnection.HTTP_OK) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    httpConn.getInputStream()));
            String line = null;
            while ((line = reader.readLine()) != null) {
                response.add(line);
            }
            reader.close();
            httpConn.disconnect();
        } else {
            throw new IOException("Server returned non-OK status: " + status);
        }
        return response;
    }
}

但现在的问题是:

本地服务器:

• 允许上传到16MB[如果setChunkedStremmingMode(0)未设置]
• 允许上传到150MB[如果setChunkedStremmingMode(0)被设置]

在实时服务器上:

• 允许上传到16MB[如果setChunkedStremmingMode(0)未设置]
• 禁止上传单个KB文件[如果setChunkedStremmingMode(0)被设置]

我的本地和活动服务器具有相同的配置。我不明白为什么setChunkedStremmingMode(0)不适合实时服务器