Develop Reference

Calling Async class from Async class in Android not working?

So my goal is to load a random wikipedia page, get the title from it, and then use the wikipedia api to get the correct title to return for display (titles with special characters need "translated" to be able to display them correctly.) My problem comes when I use my JSONRequest class (Async) to try to execute the api url and create a JSON object. When it tries to execute, it freezes and doesn't go any further (but does not crash.) It isn't a problem with the URL, it is valid and works on desktop and mobile. This method was also used in another non-async class so I know it works there. My guess is that it is an async issue. This may be a stupid question with a simple answer, but any help is greatly appreciated!
public class getRandom extends AsyncTask<String, Void, String> {
private static final String REQUEST_METHOD = "GET";
private static final int READ_TIMEOUT = 15000;
private static final int CONNECTION_TIMEOUT = 15000;
String result, rawTitle;
// Gets random wiki page and returns text to be loaded into search bar
#Override
protected String doInBackground(String... params){
String randomUrl = "https://en.wikipedia.org/wiki/Special:Random";
String titleApiUrl = "https://en.wikipedia.org/w/api.php?action=query&format=json&titles=";
// Get random title
try {
URL url = new URL(randomUrl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
//Set method and timeouts
con.setRequestMethod(REQUEST_METHOD);
con.setReadTimeout(READ_TIMEOUT);
con.setConnectTimeout(CONNECTION_TIMEOUT);
// Get status
int status = con.getResponseCode();
// Check for move or redirect and update url
if (status == HttpURLConnection.HTTP_MOVED_TEMP
|| status == HttpURLConnection.HTTP_MOVED_PERM) {
String location = con.getHeaderField("Location");
URL newUrl = new URL(location);
con = (HttpURLConnection) newUrl.openConnection();
}
// Get name of page
rawTitle = con.toString();
int temp = rawTitle.indexOf("wiki/") + 5;
rawTitle = rawTitle.substring(temp);
con.disconnect();
}
catch(IOException e){
e.printStackTrace();
rawTitle = "Sailboats"; // Very random, totally not hard coded result.
}
// Ensure correct title format (use wiki api)
try{
// Get json from api
JSONRequest wikiRequest = new JSONRequest();
String wikiApiJsonString = wikiRequest.execute(titleApiUrl + rawTitle).get();
// Create json object with returned string
JSONObject jsonObj = new JSONObject(wikiApiJsonString);
// Get correct title from json
result = jsonObj.getString("title");
}
catch(ExecutionException | InterruptedException | JSONException e){
e.printStackTrace();
result = "Sailboats"; // Very random, totally not hard coded result.
}
return result;
}
protected void onPostExecute(String result){
super.onPostExecute(result);
}
}

By default, async tasks all run on the same thread. So it won't actually start a second task until yours finishes. Your options are:
1)Call executeOnExecutor instead of execute and tell it to use a new thread.
2)Architect your code such that you can make the request on this thread directly. You're already on a thread, no reason to launch a new one.
3)Write your code such as you don't need to call .get().

Issue with azure cognitive translation services

After getting the following code to work reliably for a month or so, it stopped working reliably a couple of days ago. About half the time it returns a properly translated string and the other half of the time it returns one of the following two messages:
java.io.FileNotFoundException:
https://api.cognitive.microsoft.com/sts/v1.0/issueToken
java.net.UnknownHostException: Unable to resolve host
"api.microsofttranslator.com": No address associated with hostname
The timing of this problem's beginning coincided with the expiration of my free azure cognitive services account however I migrated to a pay-as-you-go account yesterday and the problem continues.
Why is this happening?
static class translateMessageX extends AsyncTask<String, Void, String>
{
//input string array of 3 items
//[0]is the message to be translated
//[1]is the from language i.e. "english"
//[2]is the to language i.e. "spanish"
//[3]"echo" or "received"
String retString;
String inString = null;
String messageType = null;
String URLHolder = ""; //hold the URL here while we are translating the text
#Override
protected String doInBackground(String... params)
{
inString = params[0];
String from = params[1];
String to = params[2];
messageType = params[3];
int urlStart = inString.indexOf("http");
if (!(urlStart == -1))
{
URLHolder = inString.substring(urlStart);
inString = inString.substring(0, urlStart -1);
}
else
{
URLHolder = "";
}
Integer mesChars = params[0].length();
Integer tCharsLeft = GlobalStuff.getTranslationsFromSP();
if (tCharsLeft > 0)
{
if (tCharsLeft < mesChars) //we charge for both 'echo' and 'received' translations
{
GlobalStuff.updateTranslationInventory(tCharsLeft * -1);
}
else
{
GlobalStuff.updateTranslationInventory(mesChars * -1);
}
GlobalStuff.notifyListeners(this, "#uui", "notused", "notused" );
try
{
Language fromLang = GlobalStuff.getLang(from);
Language toLang = GlobalStuff.getLang(to);
//retString = Translate.execute(inString, fromLang, toLang);
//String debugstr = "look at retStr";
String authenticationUrl = "https://api.cognitive.microsoft.com/sts/v1.0/issueToken";
HttpsURLConnection authConn = (HttpsURLConnection) new URL(authenticationUrl).openConnection();
authConn.setRequestMethod("POST");
authConn.setDoOutput(true);
authConn.setRequestProperty("Ocp-Apim-Subscription-Key", GlobalStuff.translateKey);
IOUtils.write("", authConn.getOutputStream(), "UTF-8");
String token = IOUtils.toString(authConn.getInputStream(), "UTF-8");
System.out.println(token);
// Using the access token to build the appid for the request url
String appId = URLEncoder.encode("Bearer "+token, "UTF-8");
String text = URLEncoder.encode(inString, "UTF-8");
String translatorTextApiUrl = String.format("https://api.microsofttranslator.com/v2/http.svc/Translate?appid=%s&text=%s&from=%s&to=%s", appId, text, fromLang, toLang);
HttpsURLConnection translateConn = (HttpsURLConnection) new URL(translatorTextApiUrl).openConnection();
translateConn.setRequestMethod("GET");
translateConn.setRequestProperty("Accept", "application/xml");
retString = IOUtils.toString(translateConn.getInputStream(), "UTF-8");
String debug = "look at retString";
}
catch (Exception e)
{
retString = e.toString();
}
}
else
{
retString = "OUT OF TRANSLATION CREDITS - " + inString;
}
return retString;
}
#Override
protected void onPostExecute(String result)
{
//rest of logic should be here??
String debug = "look at result";
String answer = extractTranslation(result);
.. . . .

Host not found looks like a simple connectivity error. These hosts do exist.
You can void the call to the token service by passing the key in the call to api.microsofttranslator.com directly:
https://cognitive.uservoice.com/knowledgebase/articles/1815385-api-translator-text-speech-using-the-api-key
That fixes one of the host not found problems, but not the other.
I would recommend though to not embed the key in the client application. It is safer to call the translator service from your own proxy service, where the proxy is able to safely identify your client as your client.

asp.NET login using HTTP post method with jsoup

I am recently trying to develop a android app for my school friends so they do not have to use a web browser but an simple app to check their updated grades and exam schedule but since the school wont give permission to use their DB the only method is to do HTML parsing.
so I found this library Jsoup and an example and started writing my own code but it always brings me the page source of login in page (It doesnt log in at all)
public Document getHTMLsoure() {
Document doc=null;
try {
doc = Jsoup.connect("http://karinca.meliksah.edu.tr")
.data("ctl00$ContentPlaceHolder1$txtKullaniciAdi","usernm")
.data("ctl00$ContentPlaceHolder1$txtSifre", "passwd")
.data("ctl00$ContentPlaceHolder1$btnLogin", "Giriş")
.userAgent("Mozilla")
.post();
} catch (IOException e1) {
e1.printStackTrace();
}
return doc;
}

Please check it.
Result Kullanıcı adı yada şifre hatası !
Response res = Jsoup
.connect("https://karinca.meliksah.edu.tr/View/Login")
.userAgent("Mozilla")
.execute();
Document doc = res.parse();
String eventArgument = doc.select("input[name=__EVENTARGUMENT]").val();
String viewState = doc.select("input[name=__VIEWSTATE]").val();
String viewStateGenerator = doc.select("input[name=__VIEWSTATEGENERATOR]").val();
String eventValidation = doc.select("input[name=__EVENTVALIDATION]").val();
String asyncPost = "true";
String ct = "";
String body = doc.body().html();
int indexOf = body.indexOf("Sys.WebForms.PageRequestManager._initialize(");;
if(indexOf > -1){
int indexEnd = body.substring(indexOf).indexOf("');");
if(indexEnd > -1){
String temp = body.substring(indexOf, indexOf+indexEnd);
int indexStart = temp.lastIndexOf("'");
ct = temp.substring(indexStart+1,temp.length());
}
}
Document doc1 = Jsoup.connect("https://karinca.meliksah.edu.tr/View/Login.aspx")
.referrer("https://karinca.meliksah.edu.tr/View/Login")
.cookies(res.cookies())
.data(ct+"$ContentPlaceHolder1$ScriptManager2",ct+"$ContentPlaceHolder1$UpdatePanel1|"+ct+"$ContentPlaceHolder1$btnLogin")
.data(ct+"$ContentPlaceHolder1$txtKullaniciAdi","usernm")
.data(ct+"$ContentPlaceHolder1$txtSifre", "passwd")
.data("__EVENTTARGET",ct+"$ContentPlaceHolder1$btnLogin")
.data("__EVENTARGUMENT",eventArgument)
.data("__VIEWSTATE",viewState)
.data("__VIEWSTATEGENERATOR",viewStateGenerator)
.data("__EVENTVALIDATION",eventValidation)
.data("__ASYNCPOST",asyncPost)
.userAgent("Mozilla")
.post();
System.out.println(doc1.html());

JSON parsing not encoding string with underscore in Android using Volley

I am trying to encode a string which contains a URL, I have a strange issue where the complete string is not being returned, I have noticed that it may be related to the underscore, I have tried a few solution where I replace the underscore, but haven't had much luck with that solution. Below is the JSON.
[{"id":"1","source":"BBC WORLD NEWS",
"time_date":"Sat, 25 Oct 2014 10:49:13",
"title":"Iran hangs woman despite campaign","description":"Iran defies an international campaign and hangs a woman who killed a man she said was trying to sexually abuse her.",
"link":"http:\/\/www.bbc.co.uk\/news\/world-middle-east-29769468#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa",
"image":"http:\/\/news.bbcimg.co.uk\/media\/images\/78529000\/jpg\/_78529517_78528720.jpg"},
I am trying to retrieve the image element from the json. The following is what I receive from my parsing.
http://news.bbcimg.co.uk/media/images/78526000/jpg
I am using this code at the moment:
String imageurl = feed.getImage();
try {
imageurl = URLDecoder.decode(imageurl, "UTF-8");
System.out.println("---------------------------"+imageurl);
imageurl.replace("_", "%5f");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
getimage method:
private String image;
public String getImage() {
return image;
}
private void requestNewsData(String uri) {
RestAdapter api = new RestAdapter.Builder().setEndpoint(ENDPOINT).build();
NewsAPI restapi = api.create(NewsAPI.class);
restapi.news(new Callback<List<RssObject>>() {
public void success(final List<RssObject> newsFeed, Response response) {
Log.v("nas", "the webservice success " + response.getReason());
for (int i = 0; i < newsFeed.size(); i++) {
System.out.println(newsFeed.get(i).description);
newsList.add(newsFeed.get(i).description);
FeederModel feed = new FeederModel();
feed.setSource(newsFeed.get(i).source);
feed.setImage(newsFeed.get(i).image); // adding setimage
}
}
The retrieved string is missing the final part of the url.
Any suggestion would be gratefully appreciated. Thanks.

Android: Am I doing client-side or server-side Geocoding?

So in my app I am making use of google map apis and I'm using Geocoding to determine the Address based on the user's current location. I was using the Geocoder Android Class but I've found that it truly works terribly. It's just not reliable. So I used a post I saw here at SO to create my own Geocoder. Problem is, I now don't know if I'm using server side or client side geocoding. This is kind of important because one has a limit and the other really doesn't. All of my code is in Android though.
Here's some code, this is within my "MyGeocoder" Class:
public List<Address> getFromLocation(double latitude, double longitude,
int maxResults) throws IOException, LimitExceededException {
if (latitude < -90.0 || latitude > 90.0) {
throw new IllegalArgumentException("latitude == " + latitude);
}
if (longitude < -180.0 || longitude > 180.0) {
throw new IllegalArgumentException("longitude == " + longitude);
}
if (isLimitExceeded(context)) {
throw new LimitExceededException();
}
final List<Address> results = new ArrayList<Address>();
final StringBuilder url = new StringBuilder(
"http://maps.googleapis.com/maps/api/geocode/json?sensor=true&latlng=");
url.append(latitude);
url.append(',');
url.append(longitude);
url.append("&language=");
url.append(Locale.getDefault().getLanguage());
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url.toString());
try {
HttpResponse response = httpclient.execute(httppost);
String jsonResult = inputStreamToString(
response.getEntity().getContent()).toString();
Gson gson = new Gson();
MyGeocodeResponse geocodeResponse = gson.fromJson(jsonResult, MyGeocodeResponse.class);
final Address current = new Address(Locale.getDefault());
if(geocodeResponse.getStatus().equals(STATUS_OK)) {
MyGeocode locGeocode= geocodeResponse.getResults().get(0);
String streetAddress = "";
for(MyAddressComponent component : locGeocode.getAddress_components()) {
for(String type : component.getTypes()) {
if(type.equals("locality")) {
current.setLocality(component.getLong_name());
}
if(type.equals("administrative_area_level_1")) {
current.setAdminArea(component.getLong_name());
}
if(type.equals("street_number")) {
if(streetAddress.length() != 0) {
current.setAddressLine(0, component.getLong_name() + " " + streetAddress);
} else {
streetAddress = component.getLong_name();
}
}
if(type.equals("route")) {
if(streetAddress.length() != 0) {
current.setAddressLine(0, streetAddress + " " + component.getShort_name());
} else {
streetAddress = component.getShort_name();
}
}
}
}
current.setLatitude(latitude);
current.setLongitude(longitude);
results.add(current);
}
Log.i("TEST", "Got it");
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return results;
}
Edit:
And I guess a further questions is, if this is server-side Geocoding, then can this code only be run 2,500 times per day period, or can it be run 2,500 times daily per user of the app? If it's the first option I'm still ok, but if it's the 2nd option I don't see how any app that wants to have a half-way big user base can use server-side geocoding without hitting that limit.

I now don't know if I'm using server side or client side geocoding
after looking to your code you wrote http://maps.googleapis.com/maps/api/geocode/json?sensor=true&latlng=,so it is server side reverse geocoding as you are calling geocoding api by making an extra External http call.
if this is server-side Geocoding, then can this code only be run 2,500 times per day period, or can it be run 2,500 times daily per user of the app?
2,500 request limit is per IP address(basically it is mentioning 2500 request per day),yah this code only be run 2,500 times per day for all of your user.One thing you should keep in mind you are making http call to geocoder api so it doesn't matter from where you are making this call from server or from client.
you should have a look on this google link where they have mention "When to Use Client-Side Geocoding" and "When to Use Server-Side Geocoding".