I develop an android code for transmit and received between android apps and PHP. The received part which is based on JSON, is properly working. I have tested by set variable manually in PHP code. However, when I have posted the variable from android to php, it cannot receive it. Anyone can tell me the problem ?
#Override
protected String doInBackground(Void... params) {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("username", <Your username here>));
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(<Your URL to php file>);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
HttpResponse response = httpclient.execute(httppost); // Execute Post to URL
String st = EntityUtils.toString(response.getEntity()); // This is the result from php web
Log.d(TK_Configuration.TAG, "In the try Loop" + st); // Still executing
finalResult = st; // You should register a variable for finalResult;
} catch (Exception e) {
Log.d(TK_Configuration.TAG, "Connection error : " + e.toString());
}
return "OK";
}
protected void onPostExecute(String result) {
super.onPostExecute(result);
// After that, you will have final result and process to do with it here
// Below is my simple code, please change it
if(finalResult.equals("1")){
Toast.makeText(context, context.getResources().getString(R.string.upload_bike_success), Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(context, context.getResources().getString(R.string.upload_bike_fail), Toast.LENGTH_SHORT).show();
}
// End
}
Please try this, and one more point, you should use Gson library to decode JSON quickly to Java Object after you got JSON string from server.
Note: Replace TK_Configuration.TAG << by your TAG.
you have commented this line it means you are not passing values from Android
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
remove comment from this line.
One more thing, you are passing username but from php you are trying to fetch value as $user = $_POST['name'];, both name must be same.
I've recently been working on an Android app using Android Studio which is using a Django backend. The web application is already in place I just want to make the app in Android for it.
The problem I am running in to, which is mostly because I'm new to app development, is the login authentication. I've researched on this topic here and I understand theoretically how I should go about doing this, but I have not been successful in logging in from my app.
The problem I have is this:
I get a csrf token authentication failure. It states that the cookie is not set. I understand that a post request will return this.
I am always getting a success transition in my doPost method.
I currently am lost in how to check if I have actually logged in or not. And the only solution I thought of for the cookie not being set is to do a Get request, parse the cookie as a string and pass that in to the post request. But I'm not sold on it being the best strategy. The bigger problem is not being able to tell if I have actually logged in or not. How can I check that? I have read posts on kind of explaining how to do this but as a beginner it is hard to translate that to code. How do I check if the user was actually authenticated? Any and all help is appreciated.
public class UserLoginTask extends AsyncTask<Void, Void, Boolean> {
private final String mEmail;
private final String mPassword;
UserLoginTask(String email, String password) {
mEmail = email;
mPassword = password;
}
#Override
protected Boolean doInBackground(Void... params) {
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("username", mEmail));
postParameters.add(new BasicNameValuePair("password", mPassword));
String response = null;
String get_response = null;
try
{
response = SimpleHttpClient.executeHttpPost(localLoginUrl, postParameters);
Log.d("Login Activity","Post Response is: " + response);
}
catch (Exception e)
{
Log.d("Login Activity","Error is: " + e.toString());
e.printStackTrace();
return false;
}
return true;
}
public static String executeHttpPost(String url,
ArrayList<NameValuePair> postParameters) throws Exception {
BufferedReader in = null;
try {
HttpClient client = getHttpClient();
HttpPost request = new HttpPost(url);
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);
request.setEntity(formEntity);
HttpResponse response = client.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
String result = sb.toString();
return result;
}
finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
The Django view:
def login_view(request): # Login page view
form = login_form()
if request.method == 'POST':
form = login_form(request.POST)
if form.is_valid(): # check if form is valid
user = authenticate(
username=form.cleaned_data['username'],
password=form.cleaned_data['password']) # authenthicate the username and password
login(request, user) # login the user
# Once logged in redirect to home page
response = HttpResponseRedirect("/"+some_user_url+"/home")
print "USER KEY IS: %s" % some_user_key
response.set_cookie('some_user_key', value=some_user_value, max_age=some_max_age, secure=SESSION_COOKIE_SECURE, httponly=False)
return response
else:
form = login_form() # Display empty form
return render(request, "login.html", { # loads the template and sends values for the template tags
'form': form,
})
I know the questions was asked quite a long time ago but, since there's no answer, and I'm working quite intensively with Django recently, I thought to share my very basic knowledge, hoping it will be of help for others.
The way you are dealing with the CSRF token is the correct one: first you perform a get of the login page which will give you the CSRF token in the cookie. You store the cookie and the CSRF token and you embed them in the following POST request, together with authentication data. If you get a 200 OK from the server it already means you correctly used the CSRF token, and this is an awesome start :)
In order to troubleshoot whether the user has actually logged in or not, that is whether it's credentials were accepted, you can print out the payload of the HTTP response you obtained from the server.
I use a function which prints me the response of the server in case I get an error code greater than 400. The code is the following:
public static boolean printHTTPErrorMsg(HttpURLConnection c) {
boolean error = false;
StringBuilder builder = new StringBuilder();
try {
builder.append(c.getResponseCode());
builder.append("\n");
builder.append(c.getResponseMessage());
System.out.println("RESPONSE CODE FROM SERVER");
System.out.println(builder);
InputStream _is;
if(c.getResponseCode()>=400){
error = true;
_is = c.getErrorStream();
final BufferedReader reader = new BufferedReader(
new InputStreamReader(_is));
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
reader.close();
}
} catch (Exception e) {
e.printStackTrace();
}
return error;
}
You need to tweak it because when you get a 200 OK from the server, there's no ErrorStream but simply an InputStream. So if you change your if condition to =200 and replace the getErrorStream() with getInputStream() you'll see in the log what is actually the content of the response of the server. Typically, if the login failed, the response will contain most likely the HTML code of the login page with the error message saying you provided wrong credentials.
Hope this helps
Is there a way to send android local HTML forms via ajax to remote php server? (local means the files are in my device) My scenario is this: In my app, I have an html files in my android device and is loaded in a webview, i also have the javascript file in my device. What i want to do is to send the html forms data to a remote server. In my current situation, its not sending any data, I've check the javascript and php and the code is fine, and it's working on iOS version of the app. I've tried other workarounds and what I've observed is that, when i load html file in webview using local files (e.g. webview.loadUrl("file://"+ Environment.getExternalStorageDirectory()+"/android_asset/list.html"), the android is looking for all other related files (e.g. formsprocessor.php) locally, though in javascript/ajax all necessary arguments in it's functions are supplied properly. The errors i've encountered are: FileNotFound: content://packagename.com/formsprocessor.php & Unknown chronium error: -6.
Is there a way or what is the best way to do this?
Thanks, Clint.
This solve my problem:
Used a javascripthandler, and in my javascript i call the function from the handler. So basically, the android handled the upload of data to server using httppost. Here's the codes;
the handler:
final class IJavascriptHandler{
IJavascriptHandler(){}
public void sendJSONToAndroid(String text){
if(!Config.canConnect((ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE), home) && dialogNoConnFlag == false) {
dialogNoConnFlag = true;
Config.notificationMsg(Config.ERRORNOCONN,home, Config.TITLE1 + " " + Config.TITLE6);
return;
}
try {
Log.v("SendToServer","Send JSON to Server");
String url = "";
JSONObject json_data = new JSONObject(text);
JSONArray names= json_data.names();
JSONArray values = json_data.toJSONArray(names);
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
for(int i = 0 ; i < values.length(); i++){
Log.v("Good",names.getString(i).toString());
if(names.getString(i).equals("url")) {
url = json_data.getString(names.getString(i)).toString();
}
nameValuePairs.add(new BasicNameValuePair( names.getString(i).toString(), json_data.getString(names.getString(i)).toString()));
}
Config.uploadToServer(nameValuePairs, url);
}
catch (JSONException e)
{
Config.notificationMsg(Config.ERRORMSG + e.getMessage(), (Activity) home, Config.TITLE1 + " " + Config.TITLE6);
}
}
}
the httppost:
public static String uploadToServer(List<NameValuePair> nameValuePairs, String url){
if(Session.isordinaryHost)
{
httpclient = new DefaultHttpClient();
}
else
{
httpclient = new MyHttpClient().getNewHttpClient();
((AbstractHttpClient) httpclient).getCredentialsProvider().setCredentials(
new AuthScope(Session.siteIp, 443),
new UsernamePasswordCredentials(Session.siteUsername, Session.sitePassword));
}
httppost = new HttpPost(url);
try
{
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
EntityUtils.toString(entity);
}
catch (ClientProtocolException e)
{
return e.getMessage();
}
catch (IOException e)
{
return e.getMessage();
}
return null;
}
the javascript:
function CheckCompleteRecords() {
DB.transaction(function(tx) {
tx.executeSql(SelectCompleteForUploadStatement, [], function(tx, result) {
Dataset = result.rows;
for (var i = 0, item = null; i < Dataset.length; i++) {
item = Dataset.item(i);
var a = createJSON(item['FormName'],item['UserID'],item['Image1'],item['Image2'],item['Image3'],item['Image4'],item['Image5'],item['Field1'],item['Field2'],item['Field3'],item['Field4'],item['Field5'],item['Field6'],item['Field7'],item['Field8'],item['Field9'],item['Field10'],item['Field11'],item['Field12'],item['Field13'],item['Field14'],item['Field15'],item['Field16'],item['Field17'],item['Field18'],item['Field19'],item['Field20'],item['Field21'],item['Field22'],item['Field23'],item['Field24'],item['Field25'],item['Field26'],item['Field27'],item['Field28'],item['Field29'],item['Field30'],item['Field31'],item['Field32'],item['Field33'],item['Field34'],item['Field35'],item['Field36'],item['Field37'],item['Field38'],item['Field39'],item['Field40'],item['Field41'],item['Field42'],item['Field43'],item['Field44'],item['Field45'],item['Field46'],item['Field47'],item['Field48'],item['Field49'],item['Field50'],item['Field51'],item['Field52'],item['Field53'],item['Field54'],item['Field55'],item['Field56'],item['Field57'],item['Field58'],item['Field59'],item['Field60'],item['Field61'],item['Field62'],item['Field63'],item['Field64'],item['Field65'],item['Field66'],item['Field67'],item['Field68'],item['Field69'],item['Field70'],item['Field71'],item['Field72'],item['Field73'],item['Field74'],item['Field75'],item['Field76'],item['Field77'],item['Field78'],item['Field79'],item['Field80'],item['Field81'],item['Field82'],item['Field83'],item['Field84'],item['Field85'],item['Field86'],item['Field87'],item['Field88'],item['Field89'],item['Field90'],item['Field91'],item['Field92'],item['Field93'],item['Field94'],item['Field95'],item['Field96'],item['Field97'],item['Field98'],item['Field99'],item['Field100'],item['CurrentDateTime'],item['Geolocation'],item['BarCode']);
window.cpjs.sendJSONToAndroid(a);
showStuff('SendServerBtn');
window.location = "senttoserver://app_action";
}
});
});
}
I am working on an application where I want to send an HTTP post to my Tomcat sever. In this post,I want to send the user-id as well as password and after successful authentication from TomCat it will respose to my app, I
I want next-page to display in my emulator?
Any procedure or framework on this aspect ...that I have to use.
I am posting the code to post the request and get response.
public class Register extends Activity
{
public static final String PREFS_NAME = "LoginPrefs";
public static final String USER_NAME = "USER";
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
TextView txt = (TextView) findViewById(R.id.textView1);
txt.setText(getPage());
}
private String getPage()
{
String str = "***";
try
{
HttpClient hc = new DefaultHttpClient();
HttpPost post = new HttpPost("http://www.yahoo.com");
HttpResponse rp = hc.execute(post);
if(rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK)
{
str = EntityUtils.toString(rp.getEntity());
}
}catch(IOException e){
e.printStackTrace();
}
return str;
}
}
Now u help me with how to send data with request and server will check the incoming data if data is present in database that will ensure that user is a valid user and send some response depending on that response i will navigate to next page.
How will do this? Please help since i am new to java and android.
take a look at this first response from a google search here
I am trying to develop an application where its taking username, first name , last name password from my app send to the server(website).
if that user is not present then it signed up that user, if present then signed in to that user.
All these are working perfectly. Problem is i want to give signout, for that cookie is required to set.
How to set the cookie that i am not getting. or sharedpreference is good?
My code bellow,
private boolean sendJsonToServer(String jsonStr) {
Log.d("sendJsonToServer", "called");
boolean isDataSend = false;
try {
HttpClient client = new DefaultHttpClient();
HttpPost request = new HttpPost(url);
List<NameValuePair> value = new ArrayList<NameValuePair>();
value.add(new BasicNameValuePair("Name", jsonStr));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(value);
request.setEntity(entity);
HttpResponse res = client.execute(request);
HttpEntity httpEntity = res.getEntity();
String entityStr = convertStreamToString(httpEntity.getContent());
JSONObject resObject = new JSONObject(entityStr);
resObject.getString("result");
resObject.getString("token");
Log.e("entity", "" + entityStr + " " + resObject.getString("result")
+ " " + resObject.getString("token"));
Editor edit = prefUserDetails.edit();
edit.clear();
edit.putString(TOKEN, resObject.getString("token"));
edit.commit();
String token = prefUserDetails.getString("token", "");
Log.e("token from sharedPreference", token);
String[] status_String = res.getStatusLine().toString().trim()
.split(" ");
if (status_String[1].equals("200")) {
isDataSend = true;
Log.e("isSend", "ture");
}
} catch (Exception e) {
System.out.println("Exp=" + e);
}
return isDataSend;
}
I am sending jsonObject(jsonStr) which consists of username,gender all details to my server for signup.After signup it signed in and server gives response, one is result and another is token. I want to store that token into cookie.
Then if i press sign out button the token should be remove from cookie.
I am used here shared preference in the above function, but i want cookies to use.
Plz give me a way.
thank you
SharedPreference is good option when we aretalking about cookie. As i think you will be storing session related date in cookie and this feature is well supported by shared preference.