I have used this code snippet to write an AsyncTask class that sends an image to a server. Here is a part of code in doInBackground method that is responsible for sending the image and a few arguments:
String fileName = params[3];
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(fileName);
if (!sourceFile.isFile()) {
Log.e("debug", "Source File not exist: " + fileName);
} else {
try {
/////////////////////////////////////////////////////////////////////////////
// open a URL connection to the Servlet
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(params[0]);
// 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.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("pic", fileName);
dos = new DataOutputStream(conn.getOutputStream());
//here I add some additional data
addFormField(dos,"idapp", params[1]);
addFormField(dos,"idlesson", params[2]);
addFormField(dos,"ip", params[4]);
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"pic\";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);
String byteArray = "";
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
byteArray += buffer.toString();
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();
String serverResponseMessage = conn.getResponseMessage();
Log.i("debug", "HTTP Response is : "
+ serverResponseMessage + ": " + serverResponseCode);
BufferedInputStream in;
try {
in = new BufferedInputStream(conn.getInputStream());
} catch (IOException e) {
String err = (e.getMessage() == null) ? "IOException in creating BufferedInputStream" : e.getMessage();
Log.e("debug", err);
return err;
}
try {
resultToDisplay = IOUtils.toString(in, "UTF-8");
//to [convert][1] byte stream to a string
} catch (IOException e) {
Log.e("debug", e.getMessage());
}
Log.i("debug", "result: " + resultToDisplay);
//close the streams //
//////////////////////////////////////
fileInputStream.close();
dos.flush();
dos.close();
//////////////////////////////////////
} catch (MalformedURLException ex) {
Log.e("debug", "error: " + ex.getMessage(), ex);
} catch (Exception e) {
Log.e("debug", "error: " + e.getMessage(), e);
}
} // End else block
return resultToDisplay;
And here is how do I invoke it:
CallAPI c = new CallAPI();
c.execute(CallAPI.uploadURL, getResources().getString(R.string.appID), currentLessonID+"", pathToTempFile, CallAPI.IP);
The problem is that according to the response from the server, it recieves no image at all. This is a part of code that is responsible for the answer that I currently recieve:
if(!isset($_FILES['pic'])) ex_fail("pic not set");
if($_FILES['pic']['error'] != 0) ex_fail("pic upload error ");
I get "pic not set" error. Though according to the logs, I actually write the image into DataOutputStream, I compared the bytes count - it is the same.
What could cause the problem?
