Develop Reference

"HttpDeleteWithBody" isn't deleted from Database

I'm trying to call to my API sending a JSON to delete a product from my DB; however, it doesn't delete anything.
The response of the JSON is "true," and it doesn't give to me any error; even so, when I make a query on my DB, the product is still there.
I've created a class called HttpDeleteWithBody that looks like:
class HttpDeleteWithBody extends HttpEntityEnclosingRequestBase {
public static final String METHOD_NAME = "DELETE";
public String getMethod() { return METHOD_NAME; }
public HttpDeleteWithBody(final String uri) {
super();
setURI(URI.create(uri));
}
public HttpDeleteWithBody(final URI uri) {
super();
setURI(uri);
}
public HttpDeleteWithBody() { super(); }
}
And then on my doInBackGround of my Fragment, I do this:
boolean resul = true;
try {
JSONObject usuari = new JSONObject();
try {
usuari.put("idProducte", params[0]);
usuari.put("idusuari", params[1]);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
HttpEntity entity = new StringEntity(usuari.toString());
HttpClient httpClient = new DefaultHttpClient();
HttpDeleteWithBody httpDeleteWithBody = new HttpDeleteWithBody(getResources().getString(R.string.IPAPI) + "produsuaris/produsuari");
httpDeleteWithBody.setEntity(entity);
HttpResponse response = httpClient.execute(httpDeleteWithBody);
Log.d("Response ---------->", response.getStatusLine().toString());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} catch (Exception ex) {
Log.e("ServicioRest", "Error!", ex);
}
return resul;
Furthermore, I've tried to do this:
HttpDeleteWithBody delete = new HttpDeleteWithBody(getResources().getString(R.string.IPAPI) + "produsuaris/produsuari");
StringEntity se = new StringEntity(usuari.toString(), HTTP.UTF_8);
se.setContentType("application/json");
delete.setEntity(se);
however, it doesn't work... the log says:
D/Response ---------->﹕ HTTP/1.1 200 OK
This is how I call the method:
JSONObject deleteproduct = new JSONObject();
try {
deleteproduct.put("idProducte", String.valueOf(IDPROD));
deleteproduct.put("idusuari", String.valueOf(IDUSU));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.i("Json test per afegir prod --> ", deleteproduct.toString());
TareaWSInsertar tarea = new TareaWSInsertar();
tarea.execute(String.valueOf(IDPROD), String.valueOf(IDUSU));
I've added on my Google Chrome a plug-in called "PostMan" and when I try to do this by this way, it's deleting correctly...
What I'm doing wrong?
EDIT
I tried to use cURL, and this is the result:
It is returning me false, when I put the same JSON as PostMan; nevertheless, if I put the same JSON on PostMan, it works fine.
EDIT 2
I implemented ion library and I did it like :
JSONObject usuari = new JSONObject();
try {
usuari.put("idProducte", params[0]);
usuari.put("idusuari", params[1]);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
String url = getResources().getString(R.string.IPAPI) + "produsuaris/produsuari";
Log.d("CURL", "curl -X DELETE -d '" + usuari.toString() + "' " + url);
Builders.Any.F builder = Ion.with(getActivity().getApplicationContext())
.load(HttpDelete.METHOD_NAME, url)
.setTimeout(15000).setStringBody(usuari.toString());
String response = builder.toString();
Log.d("TEST", "Req response -->" + response);
}
catch (Exception ex){
resul = false;
}
And it still returning that it's OK, and don't delete anything.

This appears to be a server side issue, to be sure of this, do the following:
1) Add Ion as an dependency in your grandle.
compile 'com.koushikdutta.ion:ion:+'
2) Use the following snippen to perform your request:
JSONObject jsonObject = new JSONObject();
try{
for(BasicNameValuePair aNameValue : getParameters()){
jsonObject.put(aNameValue.getName(), aNameValue.getValue());
Log.d("TEST","parameter "+aNameValue.getName()+": "+aNameValue.getValue());
}
jsonObject.put("time_zone", Util.timeZone());
Log.d("TEST","parameter time_zone:"+Util.timeZone());
}catch(Exception e){
//
}
Log.d("CURL", "curl -X DELETE -d '"+jsonObject.toString()+"' "+getUrl());
Builders.Any.F builder = Ion.with(getContext())
.load(HttpDelete.METHOD_NAME, getUrl())
.setTimeout(BuildConfig.HttpClientMaxTimeout).setStringBody(jsonObject.toString());
String response = builder.asString().get();
Util.checkThreadUiException();
Log.d("TEST","-->"+ response);
There's no much rocket science, this is the code that I used in an app, in that method I received the parameters to send as a json, as a BasicNameValuePair collection. You can change that and directly set your json. I'm 100% porcent sure that this request will fail, because this is a server side issue.
UPDATE
JSONObject usuari = new JSONObject();
try {
usuari.put("idProducte", params[0]);
usuari.put("idusuari", params[1]);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String url = getResources().getString(R.string.IPAPI) + "produsuaris/produsuari";
Log.d("CURL", "curl -X DELETE -d '"+usuari.toString()+"' "+url);
Builders.Any.F builder = Ion.with(getContext())
.load(HttpDelete.METHOD_NAME, url)
.setTimeout(BuildConfig.HttpClientMaxTimeout).setStringBody(usuari.toString());
String response = builder.asString().get();
Log.d("TEST","Req response -->"+ response)
UPDATE
Try this, perform this request through curl and let me know the result:
curl --http1.0 -X DELETE -d '{"idusuari":121,"idProducte":15}' 192.168.1.46/ServicioWebRest/api/produsuaris/produsuari
Doing this you're telling to curl to send the request through http 1.0, chunked responses are only supported by http 1.1, if there's an error in the chunk encoding, this should tell you.
Also take a look to this issue that I submitted to Ion long ago. I think that the problem that I was having that time, and your current problem are alike, maybe some of the tips there will help. Specially the part about the addHeader("Connection", "close").
Would look like this:
Builders.Any.F builder = Ion.with(getContext())
.addHeader("Connection", "close")
.load(HttpDelete.METHOD_NAME, getUrl())
.setTimeout(BuildConfig.HttpClientMaxTimeout).setStringBody(jsonObject.toString());

Finally I solved the problem, what I've done is change the HttpDelete method on my API, and instead of send a JSON, I send parameters (like a HttpGet) and now my code is like :
boolean resul = true;
HttpClient httpClient = new DefaultHttpClient();
String id____USER = params[0];
String id____PROD = params[1];
HttpDelete del =
new HttpDelete(getResources().getString(R.string.IPAPI) + "produsuaris/produsuari?idProd=" + Integer.parseInt(id____PROD)+"&idUs="+Integer.parseInt(id____USER));
del.setHeader("content-type", "application/json");
try
{
HttpResponse resp = httpClient.execute(del);
String respStr = EntityUtils.toString(resp.getEntity());
if(!respStr.equals("true"))
resul = false;
}
catch(Exception ex)
{
Log.e("ServicioRest","Error!", ex);
resul = false;
}
return resul;
This is how I call this AsyncMethod
TareaWSInsertar tarea = new TareaWSInsertar();
tarea.execute(String.valueOf(IDUSU),String.valueOf(IDPROD));
This work to me, I know it's not the best solution, but I've no much time, also I tried three solutions and noone didn't work.
Feel free to post a correct answer if you know what I was doing wrong.

most of the time get connection reset by peer exception in my android app

When I run the following code, I get a "connection reset by peer" exception in most instances.
String rest = System.setProperty("http.keepAlive", "false");
String uri = WEB_LOG_IN + "?user_username=" + user_email
+ "&user_password=" + user_pass + "&user_mac=" + user_mac;
HttpClient client = new DefaultHttpClient();
HttpPost httppost = new HttpPost(uri);
HttpResponse response;
String s;
try {
response = client.execute(httppost);
s = new String(EntityUtils.toByteArray(response.getEntity()),
"UTF-8");
// read json
if (s.length() > 2)
return readlogin_info(s);
else
return false;
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return false;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return false;
}
String rest = System.setProperty("http.keepAlive", "false");
returns null which means no "http.keepAlive" property.
I tried using httpurlconnection, but that also didn't work.
I am so confused because I think the code works without issue for some ISPs.

Based on my investigation the exception caused by Mikrotik Router latency! (Maybe! Please correct me if I am wrong!)
so I put the execute section in a while until it can get the answer from server, after multiple execution I see after 2 times of trying to connect it successfully get the answer.
int count = 0;
while (s == null) {
count++;
try {
response = client.execute(httpGet);
s = new String(
EntityUtils.toByteArray(response.getEntity()),
"UTF-8");
// read json
if (s.length() > 2)
{
return readlogin_info(s);
}
else
{
return false;
}
} catch (Exception e) {
e.printStackTrace();
}

How to get a working HttpsUrlConnection with Steam Web API?

im currently trying to implement the Steam Web API using the given code in the following repository -> https://github.com/Overv/SteamWebAPI/blob/master/SteamAPISession.cs into my Android app and im getting different exceptions dependend on using the given wep api ip ( 63.228.223.110 ) or the adress ( https://api.steampowered.com/ ) itself.
my code actually looks like this in the given method when building up a connection to the web api:
private String steamRequest( String get, String post ) {
final int MAX_RETRIES = 3;
int numberOfTries = 0;
HttpsURLConnection request = null;
while(numberOfTries < MAX_RETRIES) {
if (numberOfTries != 0) {
Log.d(TAG, "Retry -> " + numberOfTries);
}
try {
request = (HttpsURLConnection) new URL("https://api.steampowered.com/" + get).openConnection(); //or 63.228.223.110/ ???
SSLSocketFactory socketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
String host = "api.steampowered.com";
int port = 443;
int header = 0;
socketFactory.createSocket(new Socket(host, port), host, port, false);
request.setHostnameVerifier(new HostnameVerifier() {
#Override
public boolean verify(String s, SSLSession sslSession) {
return true;
}
});
request.setSSLSocketFactory(socketFactory);
request.setDoOutput(false);
// request.setRequestProperty("Host", "api.steampowered.com:443");
// request.setRequestProperty("Protocol-Version", "httpVersion");
request.setRequestProperty("Accept", "*/*");
request.setRequestProperty("Accept-Encoding", "gzip, deflate");
request.setRequestProperty("Accept-Language", "en-us");
request.setRequestProperty("User-Agent", "Steam 1291812 / iPhone");
request.setRequestProperty("Connection", "close");
if (post != null) {
byte[] postBytes;
try {
request.setRequestMethod("POST");
postBytes = post.getBytes("US-ASCII");
// request.setRequestProperty("Content-Length", Integer.toString(postBytes.length));
request.setFixedLengthStreamingMode(postBytes.length);
request.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
PrintWriter out = new PrintWriter(request.getOutputStream());
out.print(post);
out.close();
// DataOutputStream requestStream = new DataOutputStream(request.getOutputStream());
//// OutputStreamWriter stream = new OutputStreamWriter(request.getOutputStream());
//// stream.write(postBytes, 0, postBytes.length);
// requestStream.write(postBytes, 0, postBytes.length);
// requestStream.close();
message++;
} catch (ProtocolException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
int statusCode = request.getResponseCode();
InputStream is;
Log.d(TAG, "The response code of the status code is" + statusCode);
if (statusCode != 200) {
is = request.getErrorStream();
Log.d(TAG, String.valueOf(is));
}
// String src = null;
// OutputStreamWriter out = new OutputStreamWriter(request.getOutputStream());
// out.write(src);
// out.close();
Scanner inStream = new Scanner(request.getInputStream());
String response = "";
while (inStream.hasNextLine()) {
response += (inStream.nextLine());
}
// String src;
// BufferedReader in = new BufferedReader(new InputStreamReader(request.getInputStream()));
// StringBuilder builder = new StringBuilder();
// while ((src = in.readLine()) != null) {
// builder.append(src);
// }
// String jsonData = builder.toString();
Log.d(TAG, response); //jsonData
// in.close();
return response; //jsonData
} catch (MalformedURLException ex) {
Toast.makeText(getActivity(), ex.toString(), Toast.LENGTH_LONG).show();
ex.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (request != null) {
request.disconnect();
}
}
numberOfTries++;
}
Log.d(TAG, "Max retries reached. Giving up on connecting to Steam Web API...");
return null;
}
following exception occurs when using https://api.steampowered.com/ as url:
W/System.err﹕ java.io.FileNotFoundException: https://api.steampowered.com/ISteamOAuth2/GetTokenWithCredentials/v0001
D/OptionsFragment﹕ Failed to log in!
i've really tried and researched on those issues, but i just can't get a solution. If someone got a good hint on helping to solve these exceptions please let me know!
EDIT:
I've researched some more!
Looking up on https://partner.steamgames.com/documentation/webapi#creating the direct ip adress shouldn't be used and therefore only the DNS name itself (for further clarification look on the given link). Hence, looking up on the API interface list itself -> http://api.steampowered.com/ISteamWebAPIUtil/GetSupportedAPIList/v0001/?format=json there doesn't seem to be a given Interface with a method called ISteamOAuth2/GetTokenWithCredentials.(Or not anymore!) Only ISteamUserAuth and ISteamUserOAuth which seem to handle Authentication stuff.
I will update this post again if i should get a working connection and handling with the steam web api.
Cheers!

How does Postman Rest Client create Oauth Signature ? Unable to resolve Oauth_Signature in android

I am trying to hit the Oauth webservice which is of 1.0 Version.
I can get this done succesfully over postman client but just can't get this done in
android app.
Library used :-
signpost-commonshttp4-1.2.1.2.jar
Parameters needed for the API :-
oauth_consumer_key
oauth_nonce
oauth_version
oauth_signature
oauth_signature_method
oauth_timestamp
Code :-
HttpClient httpclient = new DefaultHttpClient();
// generate the oauth_signature
String urlParamsForSignature = "oauth_consumer_key="+consumerKey +
"&oauth_nonce=" + "pT6c0H"+
"&oauth_signature_method=HMAC-SHA1" +
"&oauth_timestamp=" + timestamp +
"&oauth_version=1.0";
String baseString = "https://oauth.withings.com/account/request_token?" + urlParamsForSignature;
String signature = computeHmac(URLEncoder.encode(baseString), consumerSecret);
// add it to params list
qparams.add(new BasicNameValuePair("oauth_signature", signature));
// generate URI which lead to access_token and token_secret.
String urlParams = "oauth_consumer_key="+consumerKey +
"&oauth_nonce=" + "pT6c0H"+
"&oauth_signature=" + signature +
"&oauth_signature_method=HMAC-SHA1" +
"&oauth_timestamp=" + timestamp +
"&oauth_version=1.0";
String url = "https://oauth.withings.com/account/request_token?" + urlParams;
HttpGet httpget = new HttpGet(url);
// output the response content.
System.out.println("oken and Token Secrect:");
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
int len;
byte[] tmp = new byte[2048];
while ((len = instream.read(tmp)) != -1) {
System.out.println(new String(tmp, 0, len, ENC));
}
}
public String computeHmac(String baseString, String key)
{
try {
Mac mac = Mac.getInstance("HmacSHA1");
SecretKeySpec secret = new SecretKeySpec(key.getBytes(), mac.getAlgorithm());
mac.init(secret);
byte[] digest = mac.doFinal(baseString.getBytes());
return new String(Base64.encodeBase64(digest));
} catch (InvalidKeyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}

As per the code you have posted.. you are not using the signpost library for generating signature. You are using your custom code for it.
You can use signpost library as follow:
//create an oAuth consumer and provide CONSUMER_KEY & CONSUMER SECRET.
DefaultOAuthConsumer defaultOAuthConsumer = new DefaultOAuthConsumer("CONSUMER_KEY","CONSUMER_SECRET");
//REQUEST URL
String url = "https://oauth.withings.com/account/request_token";
try {
// sign the url with consumer. (This will add all oAuth parameters to the query automatically and return the signed request url with all parameter).
url = defaultOAuthConsumer.sign(url);
} catch (OAuthMessageSignerException e) {
e.printStackTrace();
} catch (OAuthExpectationFailedException e) {
e.printStackTrace();
} catch (OAuthCommunicationException e) {
e.printStackTrace();
}
// use the url to make your request.

In background check the Play Store to determine if an app is available to download on the device

I know I can link to the Play Store with the URL:
market://details?id=com.example.appname
What I would love to do is 'ping' this URL in the background, and determine if the app is actually available, then, I can modify my UI as appropriate.

Let's assume that, if app is unavailable, the page under http://play.google.com/store/apps/details?id=<package_name> contains, for example, word error-section. If app is available, it does not contain this word.
Make HTTP GET to that URL and search for error-section.
No error-section - your app is available.
Otherwise, it's unavailable.
Like this:
final HttpClient client = new DefaultHttpClient();
final String getURL = "http://play.google.com/store/apps/details?id=<package_name>";
final HttpGet get = new HttpGet(getURL);
final HttpResponse responseGet = client.execute(get);
final HttpEntity resEntityGet = responseGet.getEntity();
if (resEntityGet != null)
{
final String response = EntityUtils.toString(resEntityGet);
if (response.indexOf("error-section") == -1)
{
// available
}
else
{
// unavailable
}
}

private class URLTest extends AsyncTask<Void, Void, Void> {
#Override
protected Void doInBackground(Void... params) {
try {
try {
HttpClient httpclient = new DefaultHttpClient();
String strurl = "https://play.google.com/store/apps/details?id=com.rovio.angrybirdsstarwars.ads.iap";
// String strurl =
// "https://play.google.com/store/apps/details?id=com.rovio.angrybirdsstarwars.ads.iaptest";
// //fake packagename append with "test"
HttpGet httpget = new HttpGet(strurl);
HttpResponse httpresp = httpclient.execute(httpget);
if (httpresp.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
Log.e("Found", "YES");
} else if (httpresp.getStatusLine().getStatusCode() == HttpStatus.SC_NOT_FOUND) {
Log.e("Found", "NO");
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (Exception e) {
Log.e("", "");
}
return null;
}
}
i tried with correct & fake packages and its giving bad request responze if the app not available & positive(success 200 code) if app is there..so plz check it once it might help u.
android 2.2 & app min req 2.3