We are building a web app and a mobile app, we are building the web app using the mysql database. I don't want to use a separate sqlite database for the mobile app, i want to use the same mysql database. Could anyone provide insights of this feasibility and sample snippet if available on how to connect to mysql database online and extract data
You need to expose your DB via a service layer with proper security.
Say your web app is example.com and you need to use login. So you would need a service for validating login which will accept username and password in POST data.
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.example.com/validateuser");
// Add your data
List < NameValuePair > nameValuePairs = new ArrayList < NameValuePair > (2);
nameValuePairs.add(new BasicNameValuePair("user", "foo"));
nameValuePairs.add(new BasicNameValuePair("pass", "md5_string_of_input"));
try {
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
try {
HttpResponse response = httpclient.execute(httppost);
String responseBody = EntityUtils.toString(response.getEntity());
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Something like to post and get response from your web app. Note that this is not a complete answer what you are asking for cannot be answered here
Related
I want to send the some varibeles from my android application to my ASP.NET website, so I can use it there and I don't know how to do that.
If your ASP.NET application has some type of public API that would allow it to interact with external applications, you should be able to make a Web Request to it and post the appropriate values that you needed.
I'm not terribly familiar with Android syntax, but an example like this one on making HTTP GET/POST requests from Android should point you in the right direction :
// Build your client
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("your-asp-mvc-application/Home/AcceptData");
// Build a collection of data that you want to send
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
nameValuePair.add(new BasicNameValuePair("username", "test_user"));
nameValuePair.add(new BasicNameValuePair("password", "123456789"));
// Encoding POST data
try
{
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
}
catch (UnsupportedEncodingException e) {
// log exception
e.printStackTrace();
}
// Make the request
try
{
HttpResponse response = httpClient.execute(httpPost);
// write response to log
Log.d("Http Post Response:", response.toString());
}
catch (ClientProtocolException e)
{
// Log exception
e.printStackTrace();
}
catch (IOException e)
{
// Log exception
e.printStackTrace();
}
Basically, once you make make requests, you should be able to target your application and create a Controller Action that can actually accept what you are sending it :
public ActionResult AcceptData(string username, string password)
{
// Do something here
}
First, what form of ASP.NET are you using - Forms or MVC? Also, what do you mean by "send?" Where exactly do you want the data to end up and what exactly do you want your ASP.NET application to do once it receives the data? If you simply mean that you're creating data in your phone and you want your ASP.NET web site to be able to access it too, you can just insert the data into a database that your ASP.NET web site also has access to (e.g. through a web service call or something like that).
For a project I would like to stream the sensor data of an Accelerometer (from an android phone) to a website.
Basically I have written the application that reads the data and stores it on the phone and converts it to a string. I just want to plot the x, y and z Values as line graph dynamically on a website. So If I shake my phone, the line on the website should be moving.
I had several ideas like using Node.js or Java webserver but I couldn't found any appropriate tutorials.
So maybe someone got a good idea where to find tutorials, where I can learn how to stream data to a website from my phone. It should be easy to do or not that hard but I am not very good in making webservers or so.
Keep sending your data to the server ideally making post request.
Your webserver can just read the data from the obtained requests and update the graph.
How to write a server ? go through the below link
http://tutorials.jenkov.com/java-multithreaded-servers/singlethreaded-server.html
how to post data from android ? use an async task doing the below things
public void postData() {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.server.com/");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("graphvalue", "12345"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
}
So i'm a web developer by trade but am making an app at the moment.
I've got a program on my PC which sends data from my PC to a database on my webhost.
What I'm after now, is to create an app that is able to download that data with a series of queries.
Are there any good resources around that would help me to develop some Java code, to connect to a server through my tablet when I'm out and about and download the information from my webhost when on a different wifi network?
Thanks chaps, any help is appreciated.
The way I handle it is that I just create a web page based on what I want to do. For example if I want to verify a login on an app I create a page that takes in a username and password.
On the device I just post the username and password values by using a HTTP post transaction.
Example:
public boolean LoginUser()
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("your URL comes here...");
try
{
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
DataCrypt crypt = new DataCrypt();
try
{
this.Cryptemail = crypt.bytesToHex(crypt.encrypt(this.Email));;
this.Cryptpass = crypt.bytesToHex(crypt.encrypt(this.Password));
}
catch (Exception e)
{
DebugLog.log(e.getMessage());
}
nameValuePairs.add(new BasicNameValuePair("Password", this.Cryptpass));
nameValuePairs.add(new BasicNameValuePair("Mail", this.Cryptemail));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
BasicHttpResponse response = (BasicHttpResponse) httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
String response = EntityUtils.toString(entity);
return true;
}
catch (Exception e)
{
DebugLog.log(e.getMessage());
return false;
}
return false;
}
EDIT: So you can just make a page that takes in some parameters that you want to base your query on and return the result in some way (for example by XML).
Hope this helps you out! :)
I am new to the client-server side programming so my question might be basic.
Basically, I am trying to send data in JSON format from android to a Django server. The code for sending the data is the following:
try {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://localhost:8000/androidweb/edit/");
JSONObject j = new JSONObject();
try {
j.put("name", "cdfe");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
nameValuePairs.add(new BasicNameValuePair("year", j.toString()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
}catch(Exception e) {
//catch the exception and print it
}
So my intention is to basically call the url mentioned in code. I added the url to Django urls.py so I can use the views.py class to store the JSON data I entered above in a sqlite database table, which contains only one field called "name". However, I don't know if my approach is right. Most code samples I have seen pass the data to a php file, so I was wondering if it is possible to do it through a python class, views.py?
If it is possible, can you please give me a code sample to be implemented in "views.py" of how to capture JSON data sent from the above code and store it in a table with a "name" field?
Thanks!
Data sent via POST is available via request.POST. Try examining request.POST['year'].
I am trying to send data from android to Django app. I want to store the data in a table in sqlite database called "mytable". Here is the android code:
try {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://localhost:8000/androidweb/edit/");
JSONObject j = new JSONObject();
try {
j.put("name", "david");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
nameValuePairs.add(new BasicNameValuePair("year", j.toString()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// myTextView.setText(j.toString());
HttpResponse response = httpclient.execute(httppost);
myTextView.setText(response.getStatusLine().toString());
// myTextView.setText(response.toString());
}catch(Exception e) {
myTextView.setText("Error in http connection "+e.toString());
}
The issue is resolved now. I only needed to have a return value
Sounds like Django's Cross-Site Request Forgery framework, which by default prevents third-party POST requests. Read Django's CSRF docs for details.