无法使用multipart / form数据上传文件

Question

我使用多部分表单数据上传文件时遇到问题。我用api和我现在的代码给出了ARC的截图。任何人的帮助将不胜感激。

var Ref = new Firebase('https://learning-a4158.firebaseio.com/contacts');
Ref.startAt('Priya')
    .endAt('Priya')
    .once('value', function(snap) {
       console.log('accounts matching name = Priya', snap.val())
    });

Answer 1

希望这能解决您的问题

  public String sendFileToServer(String filelocation, String targetUrl) {
        String response = "error";
        Log.e("Image filename", filelocation);
        Log.e("url", targetUrl);
        HttpURLConnection connection = null;
        DataOutputStream outputStream = null;
        // DataInputStream inputStream = null;

        String pathToOurFile = filelocation;
        String urlServer = targetUrl;
        String lineEnd = "\r\n";
        String twoHyphens = "--";
        String boundary = "*****";
        DateFormat df = new SimpleDateFormat("yyyy_MM_dd_HH:mm:ss");

        int bytesRead, bytesAvailable, bufferSize;
        byte[] buffer;
        int maxBufferSize = 1 * 1024;
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(
                    pathToOurFile));

            URL url = new URL(urlServer);
            connection = (HttpURLConnection) url.openConnection();

            // Allow Inputs & Outputs
            connection.setDoInput(true);
            connection.setDoOutput(true);
            connection.setUseCaches(false);
            connection.setChunkedStreamingMode(1024);
            // Enable POST method
            connection.setRequestMethod("POST");

            connection.setRequestProperty("Connection", "Keep-Alive");
            connection.setRequestProperty("Content-Type",
                    "multipart/form-data;boundary=" + boundary);

            outputStream = new DataOutputStream(connection.getOutputStream());
            outputStream.writeBytes(twoHyphens + boundary + lineEnd);

            String connstr = null;

            String exension_withname=filelocation.substring(filelocation.lastIndexOf("/")+1);

            Log.v("esty",exension_withname);

            connstr = "Content-Disposition: form-data;filename=\"" + exension_withname + "\"" + lineEnd;
            Log.i("Connstr", connstr);

            outputStream.writeBytes(connstr);
            outputStream.writeBytes(lineEnd);

            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            buffer = new byte[bufferSize];

            // Read file
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            Log.e("Image length", bytesAvailable + "");
            try {
                while (bytesRead > 0) {
                    try {
                        outputStream.write(buffer, 0, bufferSize);
                    } catch (OutOfMemoryError e) {
                        e.printStackTrace();
                        response = "outofmemoryerror";
                        return response;
                    }
                    bytesAvailable = fileInputStream.available();
                    bufferSize = Math.min(bytesAvailable, maxBufferSize);
                    bytesRead = fileInputStream.read(buffer, 0, bufferSize);
                }
            } catch (Exception e) {
                e.printStackTrace();
                response = "error";
                return response;
            }
            outputStream.writeBytes(lineEnd);
            outputStream.writeBytes(twoHyphens + boundary + twoHyphens
                    + lineEnd);

            // Responses from the server (code and message)
            int serverResponseCode = connection.getResponseCode();
            String serverResponseMessage = connection.getResponseMessage();
            Log.i("Server Response Code ", "" + serverResponseCode);
            Log.i("Server Response Message", serverResponseMessage);

            if (serverResponseCode == 200) {

                StringBuilder sb = new StringBuilder();
                BufferedReader rd = new BufferedReader(new InputStreamReader(  connection.getInputStream()));
                String line;
                while ((line = rd.readLine()) != null) {
                    sb.append(line);
                }
                Log.v("esty","output:"+sb.toString());
                response = "true";
            }

            String CDate = null;
            Date serverTime = new Date(connection.getDate());
            try {
                CDate = df.format(serverTime);
            } catch (Exception e) {
                e.printStackTrace();
                Log.e("Date Exception", e.getMessage() + " Parse Exception");
            }
            Log.i("Server Response Time", CDate + "");

            filelocation = CDate
                    + filelocation.substring(filelocation.lastIndexOf("."),
                    filelocation.length());
            Log.i("File Name in Server : ", filelocation);

            fileInputStream.close();
            outputStream.flush();
            outputStream.close();
            outputStream = null;
        } catch (Exception ex) {
            // Exception handling
            response = "error";
            Log.v("esty","Send file Exception"+ ex.getMessage() + "");
        ;
        }
        return response;
    }