Question

当我使用 conn.setChunkedStreamingMode（1024）时，程序会运行并上传文件，但上传的文件在上传文件夹中不可用（找不到）。

当我删除 setchunk .... 行时，文件上传成功并保存在服务器文件夹中。

使用 conn.setChunkedStreamingMode 的主要目的是让我的Android应用上传大文件大于16MB

有人请帮我解决这个OUTOFMEMORY错误要么建议从Android应用程序上传大文件的其他方法。

try {           
            // open a URL connection to the Servlet
            FileInputStream fileInputStream = new FileInputStream(sourceFile);
            URL url = new URL(upLoadServerUri);

            // Open a HTTP  connection to  the URL
            conn = (HttpURLConnection) url.openConnection(); 

            //conn.setChunkedStreamingMode(0);


            //conn.setFixedLengthStreamingMode((int)sourceFile.length());
            //conn.setFixedLengthStreamingMode(maxBufferSize+headerlength);
            conn.setDoInput(true); // Allow Inputs
            conn.setDoOutput(true); // Allow Outputs
            //conn.setRequestProperty("Content-Encoding","chunked");

            conn.setUseCaches(false); // Don't use a Cached Copy
            conn.setRequestProperty("Transfer-Encoding","chunked");
            conn.setChunkedStreamingMode(1024);
            conn.setRequestMethod("POST");                 


            //conn.setFixedLengthStreamingMode(sourceFile.length());
            //conn.setChunkedStreamingMode((int)sourceFileUri.length() /100);


            //conn.setRequestProperty("Upgrade","HTTP/1.1");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("ENCTYPE", "multipart/form-data");
            conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            conn.setRequestProperty("uploaded_file", fileName); 



            dos = new DataOutputStream(conn.getOutputStream());

            dos.writeBytes(twoHyphens + boundary + lineEnd); 
            dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""
                    + fileName + "\"" + lineEnd);

            dos.writeBytes(lineEnd);                               

            // create a buffer of  maximum size
            bytesAvailable = fileInputStream.available(); 

            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            //bufferSize=(int)sourceFile.length();
            buffer = new byte[bufferSize];

            // read file and write it into form...
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);  

            while (bytesRead > 0) {   

                dos.write(buffer, 0, bufferSize);
                dialog.incrementProgressBy(1);
                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);   

            }

            // send multipart form data necesssary after file data...
            dos.writeBytes(lineEnd);
            dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

            // Responses from the server (code and message)
            serverResponseCode = conn.getResponseCode();                
            String serverResponseMessage = conn.getResponseMessage();
            String a = conn.getContentEncoding();
            String b = conn.getContentType();
            int c = conn.getContentLength();

            Log.i("uploadFile", "HTTP Response is : " 
                    + serverResponseMessage + ": " + serverResponseCode +"a="+a+b+c);

            if(serverResponseCode == 200){

                runOnUiThread(new Runnable() {
                    public void run() {

                        String msg = "File Upload Completed.";

                        String sharemsg = "http://my url /files/";

                        String linkmsg = uploadFileName;


                        Toast.makeText(MainActivity.this, "File Upload Complete.", 
                                Toast.LENGTH_SHORT).show();

                        Intent i=new Intent(getApplicationContext(),ShareActivity.class);

                        i.putExtra("msg", msg);
                        i.putExtra("sharemsg", sharemsg);
                        i.putExtra("linkmsg", linkmsg);

                        startActivity(i);
                    }
                });                
            }    

            //close the streams //
            fileInputStream.close();
            dos.flush();
            dos.close();

        } catch (MalformedURLException ex) {

            dialog.dismiss();  
            ex.printStackTrace();

            runOnUiThread(new Runnable() {
                public void run() {
                    messageText.setText("MalformedURLException Exception : check script url.");
                    Toast.makeText(MainActivity.this, "MalformedURLException", Toast.LENGTH_SHORT).show();
                }
            });

            Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
        } catch (Exception e) {

            dialog.dismiss();  
            e.printStackTrace();

            runOnUiThread(new Runnable() {
                public void run() {
                    messageText.setText("Opps! no internet connectivity");
                    Toast.makeText(MainActivity.this, "Got Exception : see logcat ", 
                            Toast.LENGTH_SHORT).show();
                }
            });
            Log.e("Upload file to server Exception", "Exception : " 
                    + e.getMessage(), e);  
        }
        dialog.dismiss();       
        return serverResponseCode; 

    } // End else block

Answer 1

如果您使用自己的服务器端选项（如PHP），请确保已设置正确的选项，如max_execution_time和max_upload_size

post_max_size
upload_max_filesize
max_execution_time

当使用conn.setChunkedStreamingMode（1024）时，服务器端不会收到任何数据

1 个答案: