问题
I'm trying to upload a image from Android App to a server with a PHP Script. The HTTP Response returns STATUS OK: 200, but the $_FILES["upfile"]["name"] returns empty. I`ve checked my folders permissions and aready is 777.
My .java class
/********************UPLOAD DATA*************************************/
class UploadImg extends AsyncTask<Void, Void, Void>{
NetworkInfo net;
Messaging uActivity;
HttpURLConnection connection = null;
DataOutputStream outputStream = null;
DataInputStream inputStream = null;
String folderPath;
String arrayOfFiles[];
File root;
File allFiles;
String urlServer = "http://bmcpublicidade.com.br/chat/upload.php";
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 10*1024*1024;
URL url;
ProgressDialog pDialog = new ProgressDialog(Messaging.this);
@Override
protected void onPreExecute() {
Log.d(" UploadImg","onPreRequest");
pDialog.setMessage("Uploading GPS Data. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected Void doInBackground(Void... params) {
Log.d(" UploadData","doInBackground");
String fileName = ""+selectedPath;
HttpURLConnection conn = null;
DataOutputStream dos = null;
BufferedReader inStream = null;
String lineEnd = "rn";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 10*1024*1024;
String responseFromServer = "";
String urlString = "http://bmcpublicidade.com.br/chat/upload.php";
try
{
//------------------ CLIENT REQUEST
FileInputStream fileInputStream = new FileInputStream(new File(selectedPath) );
// open a URL connection to the Servlet
URL url = new URL(urlString);
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
// Allow Inputs
conn.setDoInput(true);
// Allow Outputs
conn.setDoOutput(true);
// Don't use a cached copy.
conn.setUseCaches(false);
// Use a post method.
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("enctype", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
conn.setRequestProperty("upfile", fileName);
dos = new DataOutputStream( conn.getOutputStream() );
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"upfile\"; filename='"+ selectedPath +"'" + 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)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage();
Log.i("upfile", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
if(serverResponseCode == 200){
runOnUiThread(new Runnable() {
public void run() {
String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
+" http://**********/media/uploads/";
messageText.setText(msg);
Toast.makeText(Messaging.this, "File Upload Complete.",
Toast.LENGTH_SHORT).show();
}
});
}
// close streams
Log.e("Debug","gravando arquivo: " + fileName);
fileInputStream.close();
dos.flush();
dos.close();
}
catch (MalformedURLException ex)
{
Log.e("Debug", "erro: " + ex.getMessage(), ex);
}
catch (IOException ioe)
{
Log.e("Debug", "erro: " + ioe.getMessage(), ioe);
}
//------------------ read the SERVER RESPONSE
try {
inStream = new BufferedReader ( new InputStreamReader(conn.getInputStream()) );
String str;
while (( str = inStream.readLine()) != null)
{
Log.e("Debug","Servidor diz: "+str);
}
inStream.close();
}
catch (IOException ioex){
Log.e("Debug", "erro: " + ioex.getMessage(), ioex);
}
return null;
}
@Override
protected void onPostExecute(Void result) {
Log.d(" UploadMSG","onPost");
pDialog.dismiss();
messageText.setText("Uploaded");
}
}
/********************END OF UPLOAD*************************************/
and here is my php file
// Where the file is going to be placed
$target_path = "uploads/";
/* Add the original filename to our target path.
Result is "/uploads/filename.extension" */
$target_path = $target_path . basename( $_FILES['upfile']['name']);
if( $_FILES['upfile'] )
{
if(move_uploaded_file($_FILES['upfile']['tmp_name'], $target_path)) {
// $qry = "UPDATE users set image=".$target_path." where username='$username'";
// $db->query($qry);
echo "O arquivo ". basename( $_FILES['upfile']['name']).
" está sendo enviado";
} else{
echo "Ocorreu um erro ao realizar envio de arquivo, por favor tente novamente!\n";
echo "Nome do arquivo: " . basename( $_FILES['upfile']['name'])."\n";
echo "target_path: " .$target_path;
}
}else
{
echo "Nenhum arquivo careregado!";
/*** ever enters here!!! ***/
}
Can you help me?
thanks !!!
回答1:
I've just encountered the same issue. POSTing a file succeeds with a 200 response, but _FILES is empty. I fixed the issue by specifying the Content-Length header. E.g.:
conn.setRequestProperty("Content-Length", Integer.toString(fileInputStream.available()));
Edit: So, when using this, the file appeared in _FILES but with an error code of 3. However, I also had a call to conn.setChunkedStreamingMode(1024);. Removing the Content-Length and the call to setChunkedStreamingMode worked for me, but I'm pretty sure that the empty _FILES is to do with the Content-Length field not being set correctly.
回答2:
Code looks fine but in your AsyncTask doInBackground Method, change String lineEnd = "rn"; To String lineEnd = "\r\n"; Should work. The backward slashes ensure r, n are not interpreted as letters but as special characters, r- return carriage, and n- new line.
回答3:
I have the same problem. I described it here. In my case problem is only when I'm trying to send file with content type "multipart/form-data". And I didn't solve it, maybe it deals with php or server, but question is still without answer.
As temporary solution I changed request type to default post type (application/x-www-form-urlencoded) and transfered image as base64 string. Maybe it help.
来源：https://stackoverflow.com/questions/25369277/android-file-upload-files-returns-empty