Question

...堆垛我有一个带共享文件夹的网络服务器...它的地址是：

    "http://192.168.1.1:9999/folder/0"

我搜索了大量有关下载文件的信息，需要帮助......

下载成功...如何将文件上传到我的机器人？（已启用服务器上的权限）...

case R.id.download:
    try {
         java.net.URL u = new java.net.URL("http://192.168.1.1:9999/file/2/01.mp3");
            HttpURLConnection c = (HttpURLConnection) u.openConnection();

            c.setRequestMethod("GET");
            c.setDoOutput(true);
            c.connect();
            FileOutputStream f = new FileOutputStream(new File("/sdcard/in", "01.mp3"));


            InputStream in = c.getInputStream();

            byte[] buffer = new byte[1024];
            int len1 = 0;
            while ( (len1 = in.read(buffer)) > 0 ) 
            {
                 f.write(buffer,0, len1);
            }
            f.close();
    }
    catch (Exception e) {
        System.out.println("Nay, did not work");
        textView.setText(e.getMessage());
    }
    break;

网络连接经常失败，特别是对于移动客户端。例如，如果您从Wifi切换到3G，则现有网络连接将中断，您需要重试该请求。 Apache HttpClient注册了一个默认的DefaultHttpRequestRetryHandler对象，默认情况下会重试3次失败的连接。问题是从一个网络切换到另一个网络需要一段时间，DefaultHttpRequestRetryHandler将立即重试。如何实现MY Down / UpLoading ???

Answer 1

要上传文件，您可以使用Multipart请求： http://hc.apache.org/httpcomponents-client-ga/httpmime/apidocs/org/apache/http/entity/mime/MultipartEntity.html

        client = new DefaultHttpClient(...);
        HttpPost post = new HttpPost("some url");
        MultipartEntity multipart = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);  
        multipart.addPart("Description", new StringBody("Description"));
        multipart.addPart("File", new FileBody(fileObject));
        post.setEntity(multipart);

        client.execute(post, new ResponseHandler() {

         @Override
         public Object handleResponse(HttpResponse response)
            throws ClientProtocolException, IOException {
             //handle response
          }
        });

Answer 2

Please make sure you have the required Web Services for Posting.
Just pass the file and url of server and the following should run. 

   try{
                    int maxBufferSize=1024*1024;
                    File file = new File(YourPathToFile); 
                    String fileName = file.getName();

                        URL url = new URL(YourUrlServer);
                       connection = (HttpURLConnection) url.openConnection();
                   // Allow Inputs & Outputs
                    connection.setDoInput(true);
                    connection.setDoOutput(true);
                    connection.setUseCaches(false);
                    // Enable POST method
                    connection.setRequestMethod("GET");
                    connection.setRequestProperty("Connection", "Keep-Alive");
                    connection.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
                    connection.setChunkedStreamingMode(maxBufferSize);
                    outputStream = new DataOutputStream( connection.getOutputStream() );

                    fileInputStream = new FileInputStream(file);


                    outputStream.writeBytes(twoHyphens + boundary + lineEnd);
                    outputStream.writeBytes("Content-Disposition: form-data; name=\"strAuthKey\"" + lineEnd);
                    outputStream.writeBytes(lineEnd);
                    outputStream.writeBytes(SoapRequestProcessor.authKey());//authentication key
                    outputStream.writeBytes(lineEnd);

                    outputStream.writeBytes(twoHyphens + boundary + lineEnd);
                    outputStream.writeBytes("Content-Disposition: form-data; name=\"mediaName\"" + lineEnd);
                    outputStream.writeBytes(lineEnd);
                    outputStream.writeBytes(fileName); //file.lastModified()+"_"+
                    outputStream.writeBytes(lineEnd);


                    outputStream.writeBytes(twoHyphens + boundary + lineEnd);
                    outputStream.writeBytes("Content-Disposition: form-data; name=\"uploadedfile\";filename=\"IMAGEFILE\"" + lineEnd);
                    outputStream.writeBytes(lineEnd);
                    bytesAvailable = fileInputStream.available();
                    bufferSize = Math.min(bytesAvailable, maxBufferSize);
                    buffer = new byte[bufferSize];
                    bytesRead = fileInputStream.read(buffer, 0, bufferSize);
                    while (bytesRead > 0)
                    {
                    outputStream.write(buffer, 0, bufferSize);
                    bytesAvailable = fileInputStream.available();
                    bufferSize = Math.min(bytesAvailable, maxBufferSize);
                    buffer = new byte[bufferSize];
                    bytesRead = fileInputStream.read(buffer, 0, bufferSize);
                    }

                   outputStream.writeBytes(lineEnd);



                    outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
                    fileInputStream.close();
                        outputStream.close();
                    Log.d("RESPONSE","--"+connection.getResponseMessage());
    }
                   catch (Exception e) {
                    Log.i("Exception: ",e.toString());

                    // TODO: handle exception
                }

android http客户端下载广告上传文件

2 个答案: