Develop Reference

Using HttpURLConnection increases the size of the uploaded image

Today I'm trying to upload and image to a server. I found that a lot of developers recommend the use of HttpURLConnection. The performance is very important for me, so I tried to optimize the code the most I know how to do it. The problem I faced is that the uploaded images are considerably larger than the original ones.
If anyone sees something that can be done better, it would be of great help
This is my class to upload a bitmap:
private class SubirImagen extends AsyncTask<Bitmap, Integer, APIResponse<String>> {
String token;
String boundary = "***" + System.currentTimeMillis() + "***";
String crlf = "\r\n";
String twoHyphens = "--";
public SubirImagen(String token) {
this.token = token;
}
#Override
protected void onPostExecute(APIResponse<String> stringAPIResponse) {
progressBar.setVisibility(View.INVISIBLE);
if (stringAPIResponse.getErrors().isEmpty()) {
new File(pathToFile.getPath()).delete();
imagenCambiada = false;
pathToFile = null;
controler.showToast(getContext(), stringAPIResponse.getData());
} else {
controler.showToast(getContext(), stringAPIResponse.getErrors().get(0).getErrorMsg());
}
super.onPostExecute(stringAPIResponse);
}
#Override
protected void onPreExecute() {
progressBar.setVisibility(View.VISIBLE);
progressBar.setProgress(0);
super.onPreExecute();
}
#Override
protected void onProgressUpdate(Integer... values) {
progressBar.setProgress(values[0]);
}
#Override
protected APIResponse<String> doInBackground(Bitmap... bitmaps) {
ByteArrayOutputStream bao1 = new ByteArrayOutputStream();
bitmaps[0].compress(Bitmap.CompressFormat.JPEG, 100, bao1);
byte[] ba1 = bao1.toByteArray();
int size = (twoHyphens.length() * 3) + (boundary.length() * 2) + (crlf.length() * 5) +
("Content-Disposition: form-data; name=\"imagen\";filename=\"imagen\"".length()) +
ba1.length;
HttpURLConnection urlConnection = null;
try {
URL url = new URL("http://192.168.137.1:8080/BochoGameAPI/usuario/uploadFotoPerfil");
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestProperty("Authorization", token);
urlConnection.setUseCaches(false);
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Connection", "Keep-Alive");
urlConnection.setRequestProperty("Cache-Control", "no-cache");
urlConnection.setRequestProperty("ENCTYPE", "multipart/form-data");
urlConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
urlConnection.setFixedLengthStreamingMode(size);
DataOutputStream request = new DataOutputStream(urlConnection.getOutputStream());
request.writeBytes(twoHyphens + boundary + crlf);
request.writeBytes("Content-Disposition: form-data; name=\"imagen\";filename=\"imagen\"" + crlf);
request.writeBytes(crlf);
request.flush();
int progress = 0;
int bytesRead;
byte buf[] = new byte[1024];
BufferedInputStream bufInput = new BufferedInputStream(new ByteArrayInputStream(ba1));
while ((bytesRead = bufInput.read(buf)) != -1) {
// write output
request.write(buf, 0, bytesRead);
request.flush();
progress += bytesRead;
// update progress bar
publishProgress((progress * 100) / size);
}
request.write(ba1);
request.writeBytes(crlf);
request.writeBytes(twoHyphens + boundary + twoHyphens + crlf);
request.flush();
request.close();
int code = urlConnection.getResponseCode();
if (code != 200) {
throw new IOException("Invalid response from server: " + code);
}
BufferedReader rd = new BufferedReader(new InputStreamReader(
urlConnection.getInputStream()));
String line;
Gson gson = new Gson();
Type typeToken = new TypeToken<APIResponse<String>>() {
}.getType();
APIResponse<String> apiResponse = null;
while ((line = rd.readLine()) != null) {
apiResponse = gson.fromJson(line, typeToken);
}
rd.close();
return apiResponse;
} catch (Exception e) {
e.printStackTrace();
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
}
return null;
}
}
Original image, 1.57 mb:
Uploaded image, 4.19 mb:

How to retrieve multipart/form-data from HttpServletRequest in Struts2

I am trying to retrieve the sent data on post request from the client android app, but unfortunately i am not getting multipart data from request, the code just returns null value.
Client side code: option 1:
private String uploadFile(String filePath) {
Log.d(TAG, "uploadFile: called");
HttpURLConnection connection;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1024 * 1024;
File uploadFile = new File(filePath);
if(!uploadFile.isFile()) {
mDownloadStatus = DownloadStatus.NOT_INITIALIZED;
Log.d(TAG, "uploadFile: file not found");
return null;
}
try {
FileInputStream fileInputStream = new FileInputStream(uploadFile);
mDownloadStatus = DownloadStatus.PROCESSING;
URL url = new URL(POSTUPLOADFILE_URL);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
connection.setReadTimeout(10000);
connection.setConnectTimeout(15000);
connection.setRequestProperty("ENCTYPE", "multipart/form-data");
connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
connection.setRequestProperty("uploaded_file", filePath);
connection.connect();
dos = new DataOutputStream(connection.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";filename=\""+ filePath + "\"" + lineEnd);
dos.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
Log.d(TAG, "uploadFile: bytesAvailable: " + bytesAvailable);
Log.d(TAG, "uploadFile: initial available: " + bytesAvailable);
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
Log.d(TAG, "uploadFile: initial: " + bytesRead);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
Log.d(TAG, "uploadFile: bytesRead: " + bytesRead);
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
int responseCode = connection.getResponseCode();
Log.d(TAG, "uploadFile: respnse code: " + responseCode);
fileInputStream.close();
dos.flush();
dos.close();
// receive upload link from server
int ch;
StringBuilder sb = new StringBuilder();
InputStream is = connection.getInputStream();
while ((ch = is.read()) != -1) {
sb.append((char)ch);
}
is.close();
mDownloadStatus = DownloadStatus.OK;
return sb.toString();
} catch (IOException e) {
Log.e(TAG, "uploadFile: IOException: " + e);
}
mDownloadStatus = DownloadStatus.FAILED_OR_EMPTY;
return null;
}
client side code: option 2:
private String uploadFile(String filePath) {
File uploadFile = new File(filePath);
if(!uploadFile.isFile()) {
mDownloadStatus = DownloadStatus.NOT_INITIALIZED;
Log.d(TAG, "uploadFile: file not found");
return null;
}
try {
mDownloadStatus = DownloadStatus.PROCESSING;
HttpClient httpClient = HttpClients.createDefault();
HttpPost post = new HttpPost(POSTUPLOADFILE_URL);
FileBody fileBody = new FileBody(new File(filePath));
StringBody title = new StringBody("Filename: " + filePath, ContentType.DEFAULT_TEXT);
StringBody description = new StringBody("This is a post file", ContentType.DEFAULT_TEXT);
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.addPart("file", fileBody);
builder.addPart("title", title);
builder.addPart("description", description);
HttpEntity entity = builder.build();
post.setEntity(entity);
Log.d(TAG, "uploadFile: executing request: ");
HttpResponse response = httpClient.execute(post);
Log.d(TAG, "uploadFile: response status: " + response.getCode());
Log.d(TAG, "uploadFile: " + response.toString());
} catch (IOException e) {
Log.e(TAG, "uploadFile: IOException" + e.getMessage(), e);
}
mDownloadStatus = DownloadStatus.FAILED_OR_EMPTY;
return null;
}
Server side code:
public String uploadFile() throws IOException, ServletException, FileUploadException {
System.out.println("upload file on postAction: called");
HttpServletRequest request = ServletActionContext.getRequest();
List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
System.out.println("items size: " + items.size());
for(FileItem item: items) {
if(item.isFormField()) {
// get file
} else {
}
}
return null;
}
PROBLEM: there is multipart data on the request,because request.contentLength is reasonable size, but list size just returns 0, so now I can't get uploaded file. How can I solve to get multipart data from the request?

I figured out the solution for the problem by using 'MultipartRequestWrapper'
public String uploadFile() throws IOException, ServletException, FileUploadException {
System.out.println("upload file on postAction: called");
HttpServletRequest request = ServletActionContext.getRequest();
MultiPartRequestWrapper multipartRequest = ((MultiPartRequestWrapper)ServletActionContext.getRequest());
Enumeration<String> fileParameterNames = multipartRequest.getFileParameterNames();
if(fileParameterNames.hasMoreElements()) {
String inputValue = fileParameterNames.nextElement();
System.out.println("inputValue: " + inputValue);
String[] localFileNames = multipartRequest.getFileNames(inputValue);
for (String fn : localFileNames) {
System.out.println("local filename = " + fn);
}
File[] files = multipartRequest.getFiles(inputValue);
for (File cf : files) {
File destFile = new File(POST_FILE_DESTINATION + localFileNames[0]);
FileUtils.copyFile(cf, destFile);
FileUtils.deleteQuietly(cf);
}
}
return null
}
the reference here

How can I send multiple files and texts simultaneously to server over http protocol in Android?

I wanna send a file and some variables to server, to insert in a table in a android app using AsyncTask. here is my java code:
try {
URL url = new URL(upLoadServerUri);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
httpURLConnection.setUseCaches(false);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8"));
String post_data= URLEncoder.encode("username" , "UTF-8")+"="+URLEncoder.encode(username,"UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
result="";
String line="";
while ((line=bufferedReader.readLine()) != null){
result += line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
}catch (MalformedURLException e){
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}
try {
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
// 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("bill", sourceFileUri);
dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"bill\";filename=\""
+ sourceFileUri + "\"" + 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();
// close the streams //
fileInputStream.close();
dos.flush();
dos.close();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
And PHP code:
if (is_uploaded_file($_FILES['bill']['tmp_name'])) {
$uploads_dir = './sensorLog/$user_name';
$tmp_name = $_FILES['bill']['tmp_name'];
$pic_name = $_FILES['bill']['name'];
move_uploaded_file($tmp_name, $uploads_dir.$pic_name);
if($conn->query($mysql_qry) === TRUE) {
echo "upload and update successful";
}else { echo "Error" . $mysql_qry . "<br>" . $conn->error;}
}else{ echo "File not uploaded successfully."; }
I use two httpconnection object and I think this is the problem. How can I send variables and file simultaneously? this code upload the file to server, but the table isn't updated. it just add an empty row:(.

Use this class to send multipart requests:
class MultipartUtility {
public HttpURLConnection httpConn;
public OutputStream request;//if you wanna send anything out of ordinary use this;
private final String boundary = "*****";//alter this as you wish
private final String crlf = "\r\n";
private final String twoHyphens = "--";
public MultipartUtility(String requestURL)
throws IOException {
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true);
httpConn.setDoInput(true);
httpConn.setRequestMethod("POST");
//alter this part if you wanna set any headers or something
httpConn.setRequestProperty("Connection", "Keep-Alive");
httpConn.setRequestProperty("Cache-Control", "no-cache");
httpConn.setRequestProperty(
"Content-Type", "multipart/form-data;boundary=" + this.boundary);
request = httpConn.getOutputStream();
}
//or add some other constructor to better fit your needs; like set cookies and stuff
public void addFormField(String name, String value)throws IOException {
request.write(( this.twoHyphens + this.boundary + this.crlf).getBytes());
request.write(("Content-Disposition: form-data; name=\"" + name + "\""+ this.crlf).getBytes());
request.write(this.crlf.getBytes());
request.write((value).getBytes());
request.write(this.crlf.getBytes());
request.flush();
}
public void addFilePart(String fieldName, File uploadFile)
throws IOException,Exception {
if(uploadFile.isDirectory())throw new Exception("for real? what do you expect to happen?");
request.write((this.twoHyphens + this.boundary + this.crlf).getBytes());
request.write(("Content-Disposition: form-data; name=\"" +
fieldName + "\";filename=\"" +
uploadFile.getName()+ "\"" + this.crlf).getBytes());
request.write(this.crlf.getBytes());
InputStream is=new FileInputStream(uploadFile);
byte[] bytes = new byte[1024];
int c=is.read(bytes);
while(c>0){
request.write(bytes,0,c);
c=is.read(bytes);
}
request.write(this.crlf.getBytes());
request.flush();
is.close();
}
public String finish() throws IOException {
String response ="";
request.write((this.twoHyphens + this.boundary +
this.twoHyphens + this.crlf).getBytes());
request.flush();
request.close();
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
InputStream responseStream = httpConn.getInputStream();
byte[] b=new byte[1024];
int c=responseStream.read(b);
while(c>0){
response=response+new String(b,0,c);
c=responseStream.read(b);
}
responseStream.close();
} else {
httpConn.disconnect();
throw new IOException("Server returned non-OK status: " + status);
}
httpConn.disconnect();
return response;
}
public InputStream finish_with_inputstream()throws Exception{
request.write((this.twoHyphens + this.boundary +
this.twoHyphens + this.crlf).getBytes());
request.flush();
request.close();
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
return httpConn.getInputStream();
} else {
throw new IOException("Server returned non-OK status: " + status);
}
}
}
example:
try{
MultipartUtility m=new MultipartUtility("https://mydomain");//now add you different data parts;
m.addFilePart("file_part",new File("some_file_location"));
m.addFormField("value_name","value");
//call either of the below methods based on what you need; do not call both!
String result=m.finish();//call this if the response is a small text
InputStream is=m.finish_with_inputstream(); //call this if the response is huge and not fitting in memory; don't forget to disconnect the connection afterwards;
} catch (IOException e) {
e.printStackTrace();
}
now you can handle all these data in one request on the php side:
$value=$_POST["value_name"];
$file_data=file_get_contents($_FILES["file_part"]["tmp_name"])
so for you situation it would be like below:
try{
MultipartUtility m=new MultipartUtility("https://mydomain");
m.addFilePart("bill",new File(sourceFile));
m.addFormField(URLEncoder.encode("username" , "UTF-8"),URLEncoder.encode(username,"UTF-8"));
String result=m.finish();
} catch (Exception e) {
e.printStackTrace();
}

Android - Send XML file to PHP API server using HttpURLConnection

So currently, I'm trying to import some data in the form of an XML file to a server. I have successfully logged in and am doing everything through the API of the server. The website/server responds in XML, not sure if that is relevant.
When I use the import data action of the API, the request method is actually a GET and not a POST and the response content-type is text/xml. I want to strictly stick to using HttpURLConnection and I understand that sending this XML file will require some multipart content-type thing but I'm not really sure how to proceed from here.
I've looked at these two examples but it does not work for my application (at least not directly). In addition, I don't really understand where they got some of the request headers from.
Send .txt file, document file to the server in android
http://alt236.blogspot.ca/2012/03/java-multipart-upload-code-android.html
A message from one of the developers have said "To upload the data use the action=importData&gwID=nnnn and with the usual
Multipart content encoding and place the files in the request body as usual."
How would I send my XML file to my server through its API?

This is how you do it:
public void postToUrl(String payload, String address, String subAddress) throws Exception
{
try
{
URL url = new URL(address);
URLConnection uc = url.openConnection();
HttpURLConnection conn = (HttpURLConnection) uc;
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-type", "text/xml");
PrintWriter pw = new PrintWriter(conn.getOutputStream());
pw.write(payload);
pw.close();
BufferedInputStream bis = new BufferedInputStream(conn.getInputStream());
bis.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}

This is my implementation of a Multipart form data upload using HttpURLConnection.
public class WebConnector {
String boundary = "-------------" + System.currentTimeMillis();
private static final String LINE_FEED = "\r\n";
private static final String TWO_HYPHENS = "--";
private StringBuilder url;
private String protocol;
private HashMap<String, String> params;
private JSONObject postData;
private List<String> fileList;
private int count = 0;
private DataOutputStream dos;
public WebConnector(StringBuilder url, String protocol,
HashMap<String, String> params, JSONObject postData) {
super();
this.url = url;
this.protocol = protocol;
this.params = params;
this.postData = postData;
createServiceUrl();
}
public WebConnector(StringBuilder url, String protocol,
HashMap<String, String> params, JSONObject postData, List<String> fileList) {
super();
this.url = url;
this.protocol = protocol;
this.params = params;
this.postData = postData;
this.fileList = fileList;
createServiceUrl();
}
public String connectToMULTIPART_POST_service(String postName) {
System.out.println(">>>>>>>>>url : " + url);
StringBuilder stringBuilder = new StringBuilder();
String strResponse = "";
InputStream inputStream = null;
HttpURLConnection urlConnection = null;
try {
urlConnection = (HttpURLConnection) new URL(url.toString()).openConnection();
urlConnection.setRequestProperty("Accept", "application/json");
urlConnection.setRequestProperty("Connection", "close");
urlConnection.setRequestProperty("User-Agent", "Mozilla/5.0 ( compatible ) ");
urlConnection.setRequestProperty("Authorization", "Bearer " + Config.getConfigInstance().getAccessToken());
urlConnection.setRequestProperty("Content-type", "multipart/form-data; boundary=" + boundary);
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.setUseCaches(false);
urlConnection.setChunkedStreamingMode(1024);
urlConnection.setRequestMethod("POST");
dos = new DataOutputStream(urlConnection.getOutputStream());
Iterator<String> keys = postData.keys();
while (keys.hasNext()) {
try {
String id = String.valueOf(keys.next());
addFormField(id, "" + postData.get(id));
System.out.println(id + " : " + postData.get(id));
} catch (JSONException e) {
e.printStackTrace();
}
}
try {
dos.writeBytes(LINE_FEED);
dos.flush();
dos.close();
} catch (IOException e) {
e.printStackTrace();
}
if (fileList != null && fileList.size() > 0 && !fileList.isEmpty()) {
for (int i = 0; i < fileList.size(); i++) {
File file = new File(fileList.get(i));
if (file != null) ;
addFilePart("photos[" + i + "][image]", file);
}
}
// forming th java.net.URL object
build();
urlConnection.connect();
int statusCode = 0;
try {
urlConnection.connect();
statusCode = urlConnection.getResponseCode();
} catch (EOFException e1) {
if (count < 5) {
urlConnection.disconnect();
count++;
String temp = connectToMULTIPART_POST_service(postName);
if (temp != null && !temp.equals("")) {
return temp;
}
}
} catch (IOException e) {
e.printStackTrace();
}
// 200 represents HTTP OK
if (statusCode == HttpURLConnection.HTTP_OK) {
inputStream = new BufferedInputStream(urlConnection.getInputStream());
strResponse = readStream(inputStream);
} else {
System.out.println(urlConnection.getResponseMessage());
inputStream = new BufferedInputStream(urlConnection.getInputStream());
strResponse = readStream(inputStream);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (null != inputStream)
inputStream.close();
} catch (IOException e) {
}
}
return strResponse;
}
public void addFormField(String fieldName, String value) {
try {
dos.writeBytes(TWO_HYPHENS + boundary + LINE_FEED);
dos.writeBytes("Content-Disposition: form-data; name=\"" + fieldName + "\"" + LINE_FEED + LINE_FEED/*+ value + LINE_FEED*/);
/*dos.writeBytes("Content-Type: text/plain; charset=UTF-8" + LINE_FEED);*/
dos.writeBytes(value + LINE_FEED);
} catch (IOException e) {
e.printStackTrace();
}
}
public void addFilePart(String fieldName, File uploadFile) {
try {
dos.writeBytes(TWO_HYPHENS + boundary + LINE_FEED);
dos.writeBytes("Content-Disposition: form-data; name=\"" + fieldName + "\";filename=\"" + uploadFile.getName() + "\"" + LINE_FEED);
dos.writeBytes(LINE_FEED);
FileInputStream fStream = new FileInputStream(uploadFile);
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
while ((length = fStream.read(buffer)) != -1) {
dos.write(buffer, 0, length);
}
dos.writeBytes(LINE_FEED);
dos.writeBytes(TWO_HYPHENS + boundary + TWO_HYPHENS + LINE_FEED);
/* close streams */
fStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public void addHeaderField(String name, String value) {
try {
dos.writeBytes(name + ": " + value + LINE_FEED);
} catch (IOException e) {
e.printStackTrace();
}
}
public void build() {
try {
dos.writeBytes(LINE_FEED);
dos.flush();
dos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
private static String readStream(InputStream in) {
StringBuilder sb = new StringBuilder();
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String nextLine = "";
while ((nextLine = reader.readLine()) != null) {
sb.append(nextLine);
}
/* Close Stream */
if (null != in) {
in.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return sb.toString();
}
private void createServiceUrl() {
if (null == params) {
return;
}
final Iterator<Map.Entry<String, String>> it = params.entrySet().iterator();
boolean isParam = false;
while (it.hasNext()) {
final Map.Entry<String, String> mapEnt = (Map.Entry<String, String>) it.next();
url.append(mapEnt.getKey());
url.append("=");
try {
url.append(URLEncoder.encode(mapEnt.getValue(), "UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (NullPointerException e) {
e.printStackTrace();
}
url.append(WSConstants.AMPERSAND);
isParam = true;
}
if (isParam) {
url.deleteCharAt(url.length() - 1);
}
}
}

Sending MultipartEntity using HttpURLConnection

using the below code, i am able to send a large file to the server, but i cant seem to find out how send a text with the file.(send the file plus extra data(username, password..) for example). and also receive it at the server side.
FileInputStream fileInputStream = new FileInputStream(new File(
pathToOurFile));
URL url = new URL(urlServer);
connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
connection.setChunkedStreamingMode(1024);
// 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);
String connstr = null;
connstr = "Content-Disposition: form-data; name=\"uploadedVideos\";filename=\""
+ pathToOurFile + "\"" + lineEnd;
outputStream.writeBytes(connstr);
outputStream.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// Read file
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
try {
while (bytesRead > 0) {
try {
outputStream.write(buffer, 0, bufferSize);
} catch (OutOfMemoryError e) {
e.printStackTrace();
response = "outofmemoryerror";
return response;
}
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
} catch (Exception e) {
e.printStackTrace();
response = "error";
return response;
}
outputStream.writeBytes(lineEnd);
outputStream.writeBytes(twoHyphens + boundary + twoHyphens
+ lineEnd);
fileInputStream.close();
outputStream.flush();
outputStream.close();
the server part:
HttpPostedFile file = HttpContext.Current.Request.Files[0];
string fname = Path.GetFileName(file.FileName);
file.SaveAs(Server.MapPath(Path.Combine("~/UploadedVideos/" + Date + "/", fname)));
please any help will be appreciated.
i know i can do this using HttpClient, but its not working for me in case of large files so i want to use this way.

Use this,
private static String multipost(String urlString, MultipartEntity reqEntity) {
try {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setUseCaches(false);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestProperty("Connection", "Keep-Alive");
conn.addRequestProperty("Content-length", reqEntity.getContentLength()+"");
conn.addRequestProperty(reqEntity.getContentType().getName(), reqEntity.getContentType().getValue());
OutputStream os = conn.getOutputStream();
reqEntity.writeTo(conn.getOutputStream());
os.close();
conn.connect();
if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
return readStream(conn.getInputStream());
}
} catch (Exception e) {
Log.e("MainActivity", "multipart post error " + e + "(" + urlString + ")");
}
return null;
}
private static String readStream(InputStream in) {
BufferedReader reader = null;
StringBuilder builder = new StringBuilder();
try {
reader = new BufferedReader(new InputStreamReader(in));
String line = "";
while ((line = reader.readLine()) != null) {
builder.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return builder.toString();
}
and here you can set File, username and password as like below using MultipartEntiry.
private void uploadMultipartData() throws UnsupportedEncodingException {
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart("fileToUpload", new FileBody(uploadFile));
reqEntity.addPart("uname", new StringBody("MyUserName"));
reqEntity.addPart("pwd", new StringBody("MyPassword"));
String response = multipost(server_url, reqEntity);
Log.d("MainActivity", "Response :"+response);
}
Note: You need to add httpmime jar in your libs folder.

this is my working code, i recalled copying this from somewhere, cant recall it...
package my.com.myapp.utils;
import android.util.Log;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
/**
* This utility class provides an abstraction layer for sending multipart HTTP
* POST requests to a web server.
* #author www.codejava.net
*
*/
public class MultipartUtil {
private final String boundary;
private static final String LINE_FEED = "\r\n";
private HttpURLConnection httpConn;
protected String charset;
protected OutputStream outputStream;
protected PrintWriter writer;
public boolean cancel = false;
protected boolean last_item_is_file = false;
public static String LOG_TAG = "MultipartUtil";
/**
* This constructor initializes a new HTTP POST request with content type
* is set to multipart/form-data
* #param requestURL
* #param charset
* #throws IOException
*/
public MultipartUtil(String requestURL, String charset, Boolean send_auth)
throws IOException {
this.charset = charset;
// creates a unique boundary based on time stamp
boundary = "===" + System.currentTimeMillis() + "===";
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
httpConn.setRequestProperty("User-Agent", "Android submit");
//addHeaderField("lang", AppConfig.getInstance().language);
//addHeaderField("country", AppConfig.getInstance().country);
//User user = AppConfig.getInstance().get_user();
/*
if (send_auth && user != null && user.authentication_token != null && !user.authentication_token.equalsIgnoreCase("")) {
Log.i(LOG_TAG, "user token: "+user.authentication_token);
addHeaderField("X-User-Email", user.email);
addHeaderField("X-User-Token", user.authentication_token);
} else {
Log.i(LOG_TAG, "not auth / not logged in");
}
*/
// httpConn.setRequestProperty("Test", "Bonjour");
}
public PrintWriter setup_writer() throws IOException {
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
return writer;
}
/**
* Adds a form field to the request
* #param name field name
* #param value field value
*/
public void addFormField(String name, String value) {
writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name=\"" + name + "\"")
.append(LINE_FEED);
writer.append("Content-Type: text/plain; charset=" + charset).append(
LINE_FEED);
writer.append(LINE_FEED);
writer.append(value).append(LINE_FEED);
writer.flush();
last_item_is_file = false;
}
/**
* Adds a upload file section to the request
* #param fieldName name attribute in <input type="file" name="..." />
* #param uploadFile a File to be uploaded
* #throws IOException
*/
public void addFilePart(String fieldName, File uploadFile)
throws IOException {
String fileName = uploadFile.getName();
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
FileInputStream inputStream = new FileInputStream(uploadFile);
byte[] buffer = new byte[4096];
int bytesRead = -1;
while (!cancel && (bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.flush();
inputStream.close();
if (cancel) {
writer.close();
return;
}
writer.append(LINE_FEED);
writer.flush();
last_item_is_file = true;
}
public void addFileStreamPart(String fieldName, String fileName, InputStream inputStream)
throws IOException {
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
byte[] buffer = new byte[4096];
int bytesRead = -1;
while (!cancel && (bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.flush();
inputStream.close();
if (cancel) {
writer.close();
return;
}
writer.append(LINE_FEED);
writer.flush();
last_item_is_file = true;
}
/**
* Adds a header field to the request.
* #param name - name of the header field
* #param value - value of the header field
*/
public void addHeaderField(String name, String value) {
httpConn.setRequestProperty(name, value);
//writer.append(name + ": " + value).append(LINE_FEED).flush();
//addFormField("headers["+name+"]", value);
//writer.append(name + ": " + value).append(LINE_FEED).flush();
}
public HttpURLConnection finish() throws IOException {
if (last_item_is_file)
writer.append(LINE_FEED).flush();
writer.append("--" + boundary + "--").append(LINE_FEED);
writer.close();
return httpConn;
}
}