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我的代码应该通过多部分请求将带有少量参数的图像发送到 Web 服务器。参数发送没有问题，但图像显示为空图像文件，错误数据带有响应：{“name”：“1372429494726.jpg”，“type”：“”，“tmp_name”：“”，“错误":"无法上传照片。","size":0,"max_file_size":8}

可能是什么问题？谢谢 

public boolean sendPicture(String photoUrl, String clientId, String rep){

        HttpURLConnection connection = null;
        DataOutputStream outputStream = null;
        PrintWriter writer = null;
        String urlServer = "http://myserver/v1/photos.json";
        String lineEnd = "\r\n";
        String twoHyphens = "--";
        String boundary = Long.toHexString(System.currentTimeMillis());
        ;
        String charset = "UTF-8";

        int bytesRead, bytesAvailable, bufferSize;
        int maxBufferSize = 1 * 1024 * 1024;
        try{
            File photoFile = new File(photoUrl);
            FileInputStream fileInputStream = new FileInputStream(photoFile);
            URL url = new URL(urlServer);
            connection = (HttpURLConnection)url.openConnection();
            connection.setDoInput(true);
            connection.setDoOutput(true);
            connection.setUseCaches(false);
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Connection", "Keep-Alive");
            connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
            outputStream = new DataOutputStream(connection.getOutputStream());

            // Send normal params.
            writer = new PrintWriter(new OutputStreamWriter(outputStream, charset), true);
            writer.append("--" + boundary).append(lineEnd);
            writer.append("Content-Disposition: form-data; name=\"rep\"").append(lineEnd);
            writer.append("Content-Type: text/plain; charset=" + charset).append(lineEnd);
            writer.append(lineEnd);
            writer.append(rep).append(lineEnd).flush();

            writer.append("--" + boundary).append(lineEnd);
            writer.append("Content-Disposition: form-data; name=\"clientId\"").append(lineEnd);
            writer.append("Content-Type: text/plain; charset=" + charset).append(lineEnd);
            writer.append(lineEnd);
            writer.append(clientId).append(lineEnd).flush();

            // send image
            writer.append("--" + boundary).append(lineEnd);
            writer.append("Content-Disposition: form-data; name=\"source\"; filename=\"" + photoFile.getName() + "\"").append(lineEnd);
            writer.append("Content-Type: " + URLConnection.guessContentTypeFromName(photoFile.getName())).append(lineEnd);
            writer.append("Content-Transfer-Encoding: binary").append(lineEnd);
            writer.append(lineEnd).flush();

            InputStream input = null;
            try{
                input = new FileInputStream(photoFile);
                bytesAvailable = input.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                byte[] buffer = new byte[bufferSize];
                for(int length = 0; (length = input.read(buffer)) > 0;){
                    outputStream.write(buffer, 0, length);
                }
                outputStream.flush();
            }finally{
                if(input != null) try{
                    input.close();
                }catch(IOException logOrIgnore){
                }
            }
            writer.append(lineEnd).flush();
            writer.append("--" + boundary + "--").append(lineEnd);

              //read response
            int serverResponseCode = connection.getResponseCode();
            InputStream errorInput = connection.getErrorStream();
            BufferedReader r = new BufferedReader(new InputStreamReader(errorInput));
            StringBuilder total = new StringBuilder();
            String line;
            while((line = r.readLine()) != null){
                total.append(line);
            }
            Log.v("error", total.toString());
            Log.v("serverResponseCode", "" + serverResponseCode);
            String serverResponseMessage = connection.getResponseMessage();
            Log.v("serverResponseMessage", "" + serverResponseMessage);

            fileInputStream.close();
            outputStream.flush();
            writer.close();
            Log.v("uploaded photo", "" + photoUrl);
        }catch(Exception ex){
            Log.d("UploadPhotoTask", ex.getMessage());
        }finally{
            if(writer != null) writer.close();
        }

        return true;
    }
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1 回答 1

0

设法解决它：

 public boolean sendPicture(String photoUrl, String clientId, String rep){

        HttpURLConnection connection = null;
        DataOutputStream outputStream = null;

        String pathToOurFile = photoUrl;
        String urlServer = "http://myserver/v1/photos.json";
        String lineEnd = "\r\n";
        String twoHyphens = "--";
        String boundary = "*****";

        int bytesRead, bytesAvailable, bufferSize;
        byte[] buffer;
        int maxBufferSize = 1 * 1024 * 1024;

        int serverResponseCode = 0;

        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);

            // 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);
            outputStream.writeBytes("Content-Disposition: form-data; name=\"source\";filename=\"" + pathToOurFile + "\"" + lineEnd);
            outputStream.writeBytes(lineEnd);

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

            // Read file
            bytesRead = fileInputStream.read(buffer, 0, bufferSize);

            while(bytesRead > 0){
                outputStream.write(buffer, 0, bufferSize);
                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            }

            outputStream.writeBytes(lineEnd);

            outputStream.writeBytes(twoHyphens + boundary + lineEnd);
            outputStream.writeBytes("Content-Disposition: form-data; name=\"clientId\"" + lineEnd);
            outputStream.writeBytes(lineEnd);
            outputStream.writeBytes(clientId + lineEnd);

            outputStream.writeBytes(twoHyphens + boundary + lineEnd);
            outputStream.writeBytes("Content-Disposition: form-data; name=\"rep\"" + lineEnd);
            outputStream.writeBytes(lineEnd);
            outputStream.writeBytes(rep + lineEnd);
            outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

            // Responses from the server (code and message)
            serverResponseCode = connection.getResponseCode();
            Log.v("serverResponseCode", "" + serverResponseCode);
            String serverResponseMessage = connection.getResponseMessage();
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while((line = in.readLine()) != null)
                Log.d("server", line);

            fileInputStream.close();
            outputStream.flush();
            outputStream.close();
        }catch(Exception ex){
            Log.d("UploadPhotoTask", ex.getMessage());
            return false;
            // Toast.makeText(this, "Error: " + ex.getMessage(),
            // Toast.LENGTH_LONG).show();
        }
        if(serverResponseCode == 200) return true;
        else return false;
    }
于 2013-07-01T04:40:14.540 回答