你能解释为什么android客户端将多重数据解析为非ascii聊天。使用邮递员文件上传工作正常 这是我的app.js代码
var multipart = require('connect-multiparty');
var apiRoutes = require('./routes/apiRoutes');
app.set('views', path.join(__dirname, 'views'));
app.use(logger('dev'));
app.use(bodyParser.json({limit: '50mb'}));
app.use(bodyParser.urlencoded([{extended: false},{ uploadDir:path.join(__dirname, 'uploads') }, {parameterLimit:100000}, {limit: '50mb'}]));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'uploads')));
app.use(multipart());
app.use(apiRoutes);
和apiRoutes指出我的上传功能包含简单的print req param.using postman it working good
console.log("mediaChat called", req.body, req.files);
响应
mediaChat called { apiKey: '123' } { media:
{ fieldName: 'media',
originalFilename: 'default.png',
path: '/tmp/KFnwsKGp-f4woTaBH6aPR-qa.png',
headers:
{ 'content-disposition': 'form-data; name="media"; filename="default.png"',
'content-type': 'image/png' },
size: 716,
name: 'default.png',
type: 'image/png' } }
这是我的android客户端代码（请注意此代码工作文件与php $ _FILE但不使用快递）
com.info.acruss.wave;
import android.os.AsyncTask;
import android.util.Log;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
/**
* Created by Naitik on 9/20/2016.
*/
public class UploadImage extends AsyncTask<Void, Void, String> {
String CallingURL;
URL url;
OnTaskCompleted myListener;
private static final String TAG = "UploadImage";
int timeoutMilli = 60000;
String sourceFileUri;
String ApiKey,Type;
public UploadImage(String sourceFileUri, String URL,String apiKey, String type,
OnTaskCompleted listener) {
Log.e("Uploading", "API:" + URL);
this.sourceFileUri = sourceFileUri;
this.CallingURL = URL;
this.myListener = listener;
this.ApiKey=apiKey;
this.Type=type;
try {
url = new URL(CallingURL);
Log.e(TAG, "Url : " + CallingURL);
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
@Override
protected String doInBackground(Void... params) {
String fileName = sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 10 * 1024 * 1024;
File sourceFile = new File(sourceFileUri);
if (!sourceFile.isFile()) {
Log.e("UploadImage", "Source File Does not exist";
return null;
}
String serverResponseMessage = "";
try {
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(CallingURL);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy
conn.setRequestMethod("POST";
conn.setReadTimeout(timeoutMilli);
conn.setConnectTimeout(timeoutMilli);
conn.setRequestProperty("Connection", "Keep-Alive";
conn.setRequestProperty("ENCTYPE", "multipart/form-data";
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("media", fileName);
conn.setRequestProperty("apiKey",ApiKey);
conn.setRequestProperty("media_type",Type);
conn.setRequestProperty("media", fileName);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name='media';filename='" + fileName + "'" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
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);
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)
int serverResponseCode = conn.getResponseCode();
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line = "";
StringBuilder responseOutput = new StringBuilder();
while ((line = br.readLine()) != null) {
responseOutput.append(line);
}
br.close();
serverResponseMessage = responseOutput.toString();//output.toString();
Log.e("uploadFile", "HTTP Response is : " + serverResponseMessage);
if (serverResponseCode == 200) {
//status code 200
//status ok
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
ex.printStackTrace();
Log.e("Upload file to server", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
Log.e("Upload file to server", "error: " + e.getMessage(), e);
e.printStackTrace();
}
return serverResponseMessage;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Log.e("Result", "" + result);
if (myListener != null)
if (result != null) {
myListener.onFileUploadComplete(result);
} else {
myListener.onFileUploadComplete("";
}
}
public interface OnTaskCompleted {
void onFileUploadComplete(String result);
}
}
使用android这个显示有线响应如下
mediaChat called { null: '����\u0000\u0010JFIF\u0000\u0001\u0001\u0000\u0000\u0001\u0000\u0001\u0000\u0000��\u0000C\u0000\u0010\u000b\f\u000e\f\n\u0010\u000e\r\u000e\u0012\u0011\u0010\u0013\u0018(\u001a\u0018\u0016\u0016\u00181#%\u001d(:3=Mqypdx\\egc��\u0000C\u0001\u0011\u0012\u0012\u0018\u0015\u0018/\u001a\u001a/cB8Bccccccccccc....
�\u001f.[���_�\u0014)M���XIjX��7�`=�/�8`��ïDʚ\u0018�D���#�V#q~m�q10L�' }
我也尝试过multer和其他多部分处理程序，但注意到工作。 请帮我从这个地狱出来
答案 0 :(得分：2)
服务器响应似乎编码为UTF-8。要正确解码和阅读，您可以尝试
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
指定InputStreamReader的编码部分将使用指定的编码方案解码和读取流，在本例中为UTF-8。查看javadocs了解详情。
答案 1 :(得分：0)
您需要根据bufferSize的新大小再次分配缓冲区，我修改了下面的代码：
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
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);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = null;
buffer = new byte[bufferSize];
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
答案 2 :(得分：0)
多部分表单提交消除了百分比编码所带来的许多歧义：服务器现在可以明确地要求某些编码，并且客户端可以在表单提交期间明确地告诉服务器字段所在的编码。
使用此功能有两种方法：保留未设置状态，让浏览器以与页面相同的编码发送，或者将其设置为UTF-8，然后再执行另一个转换服务器端。每种方法都有不足之处，特别是前者。
如果您告诉浏览器以与页面相同的编码发送表单，您仍然无法解决如何处理字符编码范围之外的字符。这种行为再次发生变化：Firefox 2.0将它们转换为字符实体引用，而Internet Explorer 7.0则将它们超出了可懂度。出于严肃的国际化目的，这不是一种选择。
另一种可能性是将Accept-Encoding设置为UTF-8，这就引出了一个问题：为什么你不使用UTF-8呢？这条路线更可口，但有一个值得注意的警告：您的数据将以UTF-8形式出现，因此您必须明确地将其转换为您喜欢的本地字符编码。
基于Unicode的编码（如UTF-8）可以支持多种语言，并且可以容纳这些语言混合的页面和表单。它的使用还消除了服务器端逻辑的需要，以单独确定每个服务页面或每个传入表单提交的字符编码。这大大降低了处理多语言网站或应用程序的复杂性。
Unicode编码还允许在单个页面上混合比其他任何编码选择更多的语言。