after extensive searching I was unable to find a solution to solve a file download problem.
The following script is designed to download a csv file from a remote (Hotmail) server via a WebViewClient.
The login process is done through the their standard website but I would like to capture the downloaded csv file using the following download class and store in a custom location.
It works fine with URLs that directly link to a file for eg, site.com/file.pdf but will not work on processed URLs such as site.com/downloadFile.php?n=xxxx where it just hangs until the connection is reset by the remote server
private class DownloadFile extends AsyncTask<String, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
mProgressDialog.show();
}
@Override
protected void onProgressUpdate(Integer... progress) {
super.onProgressUpdate(progress);
mProgressDialog.setProgress(progress[0]);
}
@Override
protected void onPostExecute (String result){
super.onPostExecute(result);
mProgressDialog.dismiss();
mProgressDialog = null;
}
@Override
protected String doInBackground(String... sUrl) {
try {
Log.i("File download", "Started from :"+sUrl[0]);
URL url = new URL(sUrl[0]);
//URLConnection connection = url.openConnection();
File myDir = new File(Environment.getExternalStorageDirectory() + "/myDir");
// create the directory if it doesnt exist
if (!myDir.exists()) myDir.mkdirs();
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
//Follow redirects so as some sites redirect to the file location
connection.setInstanceFollowRedirects(true);
connection.setDoOutput(true);
connection.connect();
File outputFile = new File(myDir, "hotmail_contacts.csv");
// this will be useful so that you can show a typical 0-100%
// progress bar
int fileLength = connection.getContentLength();
// download the file
InputStream input = new BufferedInputStream(url.openStream());
OutputStream output = new FileOutputStream(outputFile);
byte data[] = new byte[1024];
long total = 0;
int count;
while ((count = input.read(data)) != -1) {
total += count;
// publishing the progress....
publishProgress((int) (total * 100 / fileLength));
output.write(data, 0, count);
}
connection.disconnect();
output.flush();
output.close();
input.close();
Log.i("File download", "complete");
} catch (Exception e) {
Log.e("File download", "error: " + e.getMessage());
}
return null;
}
}
The above AsyncTask is invoked in the onDownloadStart(....) method as follows:
public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimeType, long length) {
Log.i("File download", "URL:" + url
+ " UserAgent:" + userAgent
+ "ContentDisposition:" + contentDisposition
+ "Mime:"+ mimeType + "Length:" + Long.toString(length));
// instantiate it within the onCreate method
mProgressDialog = new ProgressDialog(Email_import.this);
mProgressDialog.setMessage("File download");
mProgressDialog.setIndeterminate(false);
mProgressDialog.setMax(100);
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
// start a new download
DownloadFile downloadFile = new DownloadFile();
downloadFile.execute(url);
}// end onCreate
All the relevant permissions are in the manifest such as write external storage, internet and read network state.
Am I missing something here? Any help would be much appreciated
After looking at another post listed [here][1]
[1]: Download a file from webview to a custom folder I've made some adjustment to my code to call the URL as a HttpPost request using a HttpClient object as shown below and it seems to be working beautifully:
// Create client and set our specific user-agent string
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost(sUrl[0]);
request.setHeader("User-Agent", sUrl[1]);
HttpResponse response = client.execute(request);
Log.i("File download", "Started from :" + sUrl[0]);
File myDir = new File(Environment.getExternalStorageDirectory() + "/myDir");
// create the directory if it doesnt exist
if (!myDir.exists()) myDir.mkdirs();
File outputFile = new File(myDir, "hotmail_contacts.csv");
InputStream input = response.getEntity().getContent();