I'm sending a files that is greater than 2mb. In able to send this file I need to divide this file into smaller pieces with the size of 2mb per pieces[chunks] and send it by chunk. I already divided the files into smaller chunks and send it to web server, but the problem is when I already getting the response the file size is getting bigger while sending the file chunk by chunk.But the file size of every chunk is 2mb so I'm wondering why this happening. The expected file length is the length of the specific chunk that I send and the chunk length is the addition size of all the chunk that is already send. Here I got so far:
File mFile = new File(samplefile);
int mychunkSize = 2048 * 1024;
final long size = mFile.length();
final long chunks = size < mychunkSize? 1: (mFile.length() / mychunkSize);
int chunkId = 0;
int ordername = 0;
int bytesRead = 0, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 2 * 1024 * 1024;
if (size > maxBufferSize){ //if file size is greater than 2mb
try {
splitFiles = ChunkFiles.splitFile(mFile);
String chunkedfiles="";
int i = 0;
for (i=0; i < splitFiles.size(); i++) {
chunkedfiles = splitFiles.get(i);
try {
File theChunkFiles = new File(chunkedfiles);
FileInputStream stream = new FileInputStream(theChunkFiles);
bytesAvailable = stream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
int bufferlength = buffer.length;
// read file and write it into form...
bytesRead = stream.read(buffer, 0, bufferSize);
ordername++;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "-------------------------acebdf13572468";// random data
String param3 = mFile.getName();
String param4 = samplefile;
String chunkFileName = theChunkFiles.getName();
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");
String encoded = Base64.encodeToString((_username+":"+_password).getBytes(),Base64.NO_WRAP);
conn.setRequestProperty("Authorization", "Basic "+encoded);
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary="+boundary);
conn.setChunkedStreamingMode(0);
dos = new DataOutputStream( conn.getOutputStream() );
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"fieldNameHere\";filename=\"" + chunkFileName + "\"" + lineEnd); // filename is the Name of the File to be uploaded
dos.writeBytes("Content-Type: application/octet-stream" + lineEnd);
dos.writeBytes(lineEnd);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = stream.read(buffer, 0, bufferSize);
}
var = bufferSize;
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// Send parameter #chunks
dos.writeBytes("Content-Disposition: form-data; name=\"chunk\"" + lineEnd);
dos.writeBytes(lineEnd);
dos.writeBytes(chunkId + lineEnd);
dos.writeBytes(twoHyphens + boundary + lineEnd);
// Send parameter #name
dos.writeBytes("Content-Disposition: form-data; name=\"name\"" + lineEnd);
dos.writeBytes(lineEnd);
dos.writeBytes("ForFiddlerTest19VIDEO_20130711_151315_-2073548175.mp4" + lineEnd);
// send multipart form data necesssary after file data...
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// close streams
chunkId++;
is = conn.getInputStream();
// retrieve the response from server
int ch;
StringBuffer b =new StringBuffer();
while( ( ch = is.read() ) != -1 ){ b.append( (char)ch ); }
String s=b.toString();
Log.i("Response",s);
//stream.close();
is.close();
dos.close();
} catch (MalformedURLException ex) {
System.out.println("From CLIENT REQUEST:" + ex);
}catch (IOException ioe) {
System.out.println("From CLIENT REQUEST:" + ioe);
}catch (Exception e) {
Log.e("From CLIENT REQUEST:", e.toString());
}
}
dos.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
Here is the sample Response I've got:
{"Filename":"ForFiddlerTest19VIDEO_20130711_151315_-2073548175.mp4","ChunkId":2,"ChunkLength":2097152,"FileLength":6291456}
The file length is incrementing instead of the chunk length
Chunk length is constant - 2 MB and file length returned by server is incrementing because probably server joins chunks into single file - appends each new chunk at the end of final file so with each request you get new, larger file length in response while chunk length is constant.