I use XWalkView by Crosswalk for displaying web page in my Android application. I tried to use sessions on my webpage but sessions simply don't work, I cannot save any session.
this is how I initialize XWalkView:
xWalkWebView = (XWalkView)findViewById(R.id.page);
xWalkWebView.setResourceClient(new MyResourceClient(xWalkWebView));
xWalkWebView.load(API.BASE_URL, null);
if(me.beesafe.beesafe.app.AppInfo.isDebug) {
// turn on debugging
XWalkPreferences.setValue(XWalkPreferences.REMOTE_DEBUGGING, true);
}
and this is MyResouceClient:
class MyResourceClient extends XWalkResourceClient {
MyResourceClient(XWalkView view) {
super(view);
}
private InputStream inputStream;
private String builtDataString() throws IOException {
return "key=test";
}
private void writeDataToBuffer(ByteArrayOutputStream stream) throws IOException {
stream.write(this.builtDataString().getBytes());
stream.flush();
stream.close();
}
private void writeOutputStream(OutputStream output, ByteArrayOutputStream buffer) throws IOException {
byte[] bufferArray = buffer.toByteArray();
for(int i = 0; i < bufferArray.length; i++) {
output.write(bufferArray[i]);
}
output.flush();
output.close();
}
public String getContentType() {
return "application/x-www-form-urlencoded";
}
public String createBoundary() {
return "--------------------"
+ Long.toString(System.currentTimeMillis(), 16);
}
#Override
public WebResourceResponse shouldInterceptLoadRequest(XWalkView view, String urlStr) {
HttpURLConnection connection = null;
inputStream = null;
try {
if(urlStr.equalsIgnoreCase(API.BASE_URL)) {
URL url = new URL(urlStr);
connection = (HttpURLConnection) url.openConnection();
connection.setFixedLengthStreamingMode(this.builtDataString().getBytes().length);
connection.setUseCaches(false);
connection.setDoInput(true);
connection.setConnectTimeout(20 * 1000);
connection.setReadTimeout(30 * 1000);
connection.setDoOutput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", getContentType());
connection.setRequestProperty("Content-Language", "en-US");
connection.setRequestProperty("Connection", "keep-alive");
DataOutputStream outputStream = new DataOutputStream(
connection.getOutputStream());
ByteArrayOutputStream outputBuffer = new ByteArrayOutputStream();
writeDataToBuffer(outputBuffer);
writeOutputStream(outputStream, outputBuffer);
inputStream = connection.getInputStream();
}
} catch (MalformedURLException e) {
e.printStackTrace();
inputStream = null;
} catch (IOException e) {
e.printStackTrace();
inputStream = null;
} finally {
/*if (connection != null) {
connection.disconnect();
}*/
}
if(/*inputStream != null*/urlStr.equalsIgnoreCase(API.BASE_URL)) {
return new WebResourceResponse(null, "utf-8", inputStream);
} else {
return super.shouldInterceptLoadRequest(view, urlStr);
}
}
}
and help please ? How to turn on sessions ?
If I simply use this PHP code on my website, it does not work:
<?php
session_start();
$_SESSION['test'] = 'test';
?>
THere is nothing in $_SESSION['test']
php session works in xwalkview, You have to put session_start(); at the begin of every php file what useing session.
Related
So, I can't get rid of this problem:
I need to upload a XML file and a .jpg file from my android app(API 8) to a HTTP server (win 2008 server with IIS 7.5). I've already enabled PUT verbs and uninstalled WebDav & webdav methods as suggested from previous searches.
Plus, i'm not sure i'm doing it right server side because i can't get any response back.
here's my code
URL fileurl = new URL("Server Upload Path");
HttpURLConnection urlConnection = (HttpURLConnection) fileurl
.openConnection();
urlConnection.setRequestMethod("PUT");
urlConnection.setDoOutput(true);
urlConnection.connect();
OutputStream os = urlConnection.getOutputStream();
File upFile = new File("My Local File");
//I'm sure the file exists
FileInputStream fis = new FileInputStream(upFile);
BufferedInputStream bfis = new BufferedInputStream(fis);
byte[] buffer = new byte[1024];
int bufferLength = 0;
// now, read through the input buffer and write the contents to the
// file
while ((bufferLength = bfis.read(buffer)) > 0) {
os.write(buffer, 0, bufferLength);
}
Sorry if I forget some info you may need to help. I'm new to android and IIS too.
Why not try a standard multi-part file upload request (based on POST and not PUT):
final static String MULTIPART_BOUNDARY = "------------------563i2ndDfv2rTHiSsdfsdbouNdArYfORhxcvxcvefj3q2f";
public static void sendFileToServer(String url, File logFiles) {
HttpURLConnection connection = null;
OutputStream os = null;
DataInputStream is = null;
try {
StringBuilder fullUrl = new StringBuilder(url);
connection = (HttpURLConnection) new URL(url).openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + MULTIPART_BOUNDARY);
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestProperty("Connection", "Keep-Alive");
connection.connect();
os = new BufferedOutputStream(connection.getOutputStream());
if(os != null) {
os.write(("--" + MULTIPART_BOUNDARY + EOL).getBytes());
os.write(String.format("Content-Disposition:form-data;name=\"UploadedFile\";filename=\"%s\"\r\nContent-Type: application/x-zip-compressed\r\n\r\n", UPLOADED_FILE_NAME).getBytes());
// Upload file(s) data here and send
os.write((EOL + "--" + MULTIPART_BOUNDARY + "--" + EOL + EOL).getBytes());
os.flush();
os.close();
os = null;
}
if(connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
// Process server response
}
} catch (MalformedURLException e) {
} catch (IOException e) {
} catch (Exception e1) {
} finally {
try {
if(os != null) {
os.close();
}
} catch (IOException e) {
Log.e(TAG, "sendFileToServer exception: close OutputStream", e);
}
try {
if(is != null) {
is.close();
}
} catch (IOException e) {
Log.e(TAG, "sendFileToServer exception: close InputStream", e);
}
if(connection != null) {
connection.disconnect();
}
}
}
I need sometimes read XML file from remote server, and replace data in XML on my Android device.
I read data through XmlPullParser:
XmlPullParser users;
try {
URL xmlUrl = new URL("http://xx.xx.xx.xx/1.xml");
users = XmlPullParserFactory.newInstance().newPullParser();
users.setInput(xmlUrl.openStream(), null);
}
How can I replace it on Android?
Simply use this code, it's overwrites the file with the new file you download from the internet.
public static boolean downloadFile(String fileToDownload, File newPath,
String newFileName) {
try {
URL url = new URL(fileToDownload);
HttpURLConnection urlConnection = (HttpURLConnection) url
.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
if (!newPath.isDirectory()) {
CreateLog.createFolder(newPath.toString());
}
File file = new File(newPath.toString() + "/" + newFileName);
if (!file.isFile()) {
CreateLog.writeLogToFile(newPath.toString() + newFileName,
"%TEMP%");
}
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ((bufferLength = inputStream.read(buffer)) > 0) {
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
return true;
} catch (MalformedURLException e) {
CreateLog.addToLog(e.toString());
return false;
} catch (IOException e) {
CreateLog.addToLog(e.toString());
return false;
}
}
public static void createFolder(String filePath) {
File createFolder = new File(filePath);
createFolder.mkdirs();
}
A cleaner method is to use a Asynctask, the code runs in a new thread. But it's a bit harder to code.
private class GetProblems extends AsyncTask<String, Integer, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(String... params) {
for (String myUrl : params) {
try {
URL url = new URL(myUrl);
URLConnection ucon = url.openConnection();
ucon.setRequestProperty("Accept", "application/xml");
InputStream is = ucon.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayBuffer baf = new ByteArrayBuffer(50);
int current = 0;
while ((current = bis.read()) != -1) {
baf.append((byte) current);
}
String str = new String(baf.toByteArray(), "UTF8");
return str;
} catch (MalformedURLException e) {
CreateLog.addToLog("[GetProblems] " + e.toString());
} catch (IOException e) {
CreateLog.addToLog("[GetProblems] " + e.toString());
}
}
return "error";
}
#Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
// updateProgressBar(values[0]);
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
...write result to a file
}
}
Run the AsyncTask code:
new GetProblems().execute("http://myurl.com/xmlfile.xml");
following is my code:
private byte[] downloadImage(String image_url) {
byte[] image_blob = null;
URL _image_url = null;
HttpURLConnection conn = null;
InputStream inputStream = null;
try {
_image_url = new URL(image_url);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
conn = (HttpURLConnection) _image_url.openConnection();
} catch (IOException e) {
e.printStackTrace();
}
conn.setDoInput(true);
try {
conn.connect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
conn.setUseCaches(false);
try {
inputStream = conn.getInputStream();
inputStream.read(image_blob);
} catch (IOException ex) {
ex.printStackTrace();
} finally {
try {
inputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
conn.disconnect();
}
return image_blob;
}
What I am trying to do is to get the byte array of an Image. Use it in a parcel to transfer it to another activity.
Using this code a NullPointerException is reported. Can any one say what is wrong?
You might want to try it like this:
DefaultHttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(imageUrl);
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
int imageLength = (int)(entity.getContentLength());
InputStream is = entity.getContent();
byte[] imageBlob = new byte[imageLength];
int bytesRead = 0;
while (bytesRead < imageLength) {
int n = is.read(imageBlob, bytesRead, imageLength - bytesRead);
if (n <= 0)
; // do some error handling
bytesRead += n;
}
And by the way: The NullPointerException is caused because image_blob is null. You need to allocate the array first before you can read data into it.
Rather then sending image, you can send path of image which is download in cache. You can just use this methods to proive image path and download image into local path.
private String createLocal(String surl) {
URL url;
try {
url = new URL(surl);
String tempname=String.valueOf(surl.hashCode());
File root=getCacheDir();
File localfile=new File(root.getAbsolutePath()+"/"+tempname);
localfile.deleteOnExit();
if(!localfile.exists()){
InputStream is=url.openStream();
OutputStream os = new FileOutputStream(localfile);
CopyStream(is, os);
os.close();
}
return localfile.getAbsolutePath();
} catch (Exception e){
return null;
}
}
public static void CopyStream(InputStream is, OutputStream os) {
final int buffer_size=1024;
try {
byte[] bytes = new byte[buffer_size];
for(;;) {
int count=is.read(bytes, 0, buffer_size);
if(count == -1)
break;
os.write(bytes, 0, count);
}
}
catch(Exception ex){}
}
Your byte[] image_blob is null,you must new enough space like that before you use it:
image_blob = new byte[enough];
inputStream.read(image_blob);
public static byte[] getByteArray(String url) throws IOException {
InputStream inputStream = (InputStream) new URL(url).getContent();
return IOUtils.toByteArray(inputStream);
}
I am using Dropbox in my project to get tiny url from dropbox which is like http://www.db.tt/xyzabc.
When I try to download the file in HTC My touch my code works fine, but if I try in Motorola Atrix it throws exception unknown host db.tt.
Actually first I have url like http://www.db.tt/xyzabc which is HTTP url I open it than I get exception and in exception I get actual url to file which contain file and is HTTPS url in exception. I start downloading file here is my code which work for me:
public static void fileUrl(String fAddress, String localFileName,
String destinationDir) {
OutputStream outStream = null;
URLConnection uCon = null;
InputStream is = null;
try {
URL url;
byte[] buf;
int ByteRead, ByteWritten = 0;
url = new URL(fAddress);
outStream = new BufferedOutputStream(new FileOutputStream(
destinationDir + localFileName));
try {
// Here i have "http://www.db.tt/xyzabc"
// after i hit url i get exception and in exception that
// FileNotFoundException at https://www.dropbox.com/abcxyz
// i get actual actual url i parse that exception and
//retrive https://www.dropbox.com/xyzabc(actual url)
// but in motorolla atrix instead of that url i get
// unknownhost exception "db.tt"
uCon = url.openConnection();
// uCon.connect();
is = uCon.getInputStream();
} catch (Exception e) {
url = new URL(e.getMessage().substring(
e.getMessage().indexOf("https"),
e.getMessage().length()));
outStream = new BufferedOutputStream(new FileOutputStream(
destinationDir + localFileName));
uCon = url.openConnection();
is = uCon.getInputStream();
}
buf = new byte[size];
while ((ByteRead = is.read(buf)) != -1) {
outStream.write(buf, 0, ByteRead);
ByteWritten += ByteRead;
}
System.out.println("Downloaded Successfully.");
System.out.println("File name:\"" + localFileName
+ "\"\nNo ofbytes :" + ByteWritten);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
is.close();
outStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
ok after few attempt i made it solve my self and here is the solution will be helpfull if someone got same problem it requires some error handling and modification according to need
After seeing class heirarchy of Connection i found that HttpsURLConnection is child of HttpURLConnection and HttpURLConnection is child of UrlConnection so i i used HTTPConnection instead of UrlConnection and as HttpsUrlConnection is concrete for HttpsUrlConnection it solved my problem
i continue iterating till i get Https url after redirect
public static void fileUrl(String fAddress, String localFileName,
String destinationDir) {
OutputStream outStream = null;
URLConnection uCon = null;
HttpURLConnection mHttpCon;
InputStream is = null;
try {
URL url;
byte[] buf;
int ByteRead, ByteWritten = 0;
url = new URL(fAddress);
outStream = new BufferedOutputStream(new FileOutputStream(
destinationDir + localFileName));
try {
mHttpCon = (HttpURLConnection) url.openConnection();
while (!url.toString().startsWith("https")) {
mHttpCon.getResponseCode();
url = mHttpCon.getURL();
mHttpCon = (HttpURLConnection) url.openConnection();
}
is = mHttpCon.getInputStream();
} catch (Exception e) {
e.printStackTrace();
// url = new URL(e.getMessage().substring(
// e.getMessage().indexOf("https"),
// e.getMessage().length()));
// outStream = new BufferedOutputStream(new FileOutputStream(
// destinationDir + localFileName));
//
// uCon = url.openConnection();
// is = uCon.getInputStream();
}
buf = new byte[size];
while ((ByteRead = is.read(buf)) != -1) {
outStream.write(buf, 0, ByteRead);
ByteWritten += ByteRead;
}
System.out.println("Downloaded Successfully.");
System.out.println("File name:\"" + localFileName
+ "\"\nNo ofbytes :" + ByteWritten);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
is.close();
outStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
public static void fileDownload(String fAddress, String destinationDir) {
int slashIndex = fAddress.lastIndexOf('/');
int periodIndex = fAddress.lastIndexOf('.');
String fileName = fAddress.substring(slashIndex + 1);
if (periodIndex >= 1 && slashIndex >= 0
&& slashIndex < fAddress.length() - 1) {
fileUrl(fAddress, fileName, destinationDir);
} else {
System.err.println("path or file name.");
}
}
This answer works - to an extent. I have a similar solution here
There is still a problem with Dropbox short hyperlinks on Atrix. They redirect from http to https but NOT to the required file, instead I get a whole lot of html from inside Dropbox.
I want to Download An image from a remote server. But each time I get A nullpointer exception.
Method For Conencting to Server
private InputStream OpenHttpConnection(String urlString)
throws IOException
{
InputStream in = null;
int response = -1;
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
if (!(conn instanceof HttpURLConnection))
throw new IOException("Not an HTTP connection");
try{
HttpURLConnection httpConn = (HttpURLConnection) conn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
response = httpConn.getResponseCode();
if (response == HttpURLConnection.HTTP_OK) {
in = httpConn.getInputStream();
Log.i("Download ", "Response: OK");
}
else
Log.i("Download ", "Response: NOK");
}
catch (Exception ex)
{
throw new IOException("Error connecting");
}
return in;
}
Method For Creating Bitmap
private Bitmap DownloadImage(String URL)
{
Bitmap bitmap = null;
InputStream in = null;
try {
in = OpenHttpConnection(URL);
Log.i("Download ", "InputStream Available: " +in.available());
bitmap = BitmapFactory.decodeStream(in);
Log.i("Download ", "Bitmap: " +bitmap.describeContents());
in.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return bitmap;
}
The null pointerException is thrown when I decodeStream, but when I use a different URL it works.
I run Apache on port 90. could this also have an effect if any.
try this I hope is working.
to connect with ftp use this code
public FTPClient mFTPClient = null;
public boolean ftpConnect(String host, String username,
String password, int port)
{
try {
mFTPClient = new FTPClient();
// connecting to the host
mFTPClient.connect(host, port);
// now check the reply code, if positive mean connection success
if (FTPReply.isPositiveCompletion(mFTPClient.getReplyCode())) {
// login using username & password
boolean status = mFTPClient.login(username, password);
return status;
}
} catch(Exception e) {
Log.d(TAG, "Error: could not connect to host " + host );
}
return false;
}
to download file use this code
public boolean ftpDownload(String srcFilePath, String desFilePath)
{
boolean status = false;
try {
FileOutputStream desFileStream = new FileOutputStream(desFilePath);;
status = mFTPClient.retrieveFile(srcFilePath, desFileStream);
desFileStream.close();
return status;
} catch (Exception e) {
Log.d(TAG, "download failed");
}
return status;
}