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PORemote Databasing
 

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  1. PORemote Databasing
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    <p>I'm trying to use a web service to store/retrieve info from a remote SQL database. For some reason empty strings are being inserted into the DB rather than the strings I want stored.</p> <p>What I need is to store the strings deviceID &amp; dateStamp if no entry in DB exists with deviceID.</p> <p>DB table name is trials, and the columns are: _id | device_id | install_date</p> <p>Note: Connects and interacts with database, just stores "" and "" instead of the strings.</p> <p>Can someone please tell me why this is? This is my first time I've tried this kind of thing so having a lot of trouble and trying to modify snippets I found to my needs.</p> <p>Here is my java code:</p> <pre><code>import java.io.InputStream; import java.util.ArrayList; import java.util.Date; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.provider.Settings.Secure; import android.widget.Toast; public class LicenseCheck extends Activity { String deviceID="",dateStamp=""; byte[] data; HttpPost httppost; StringBuffer buffer; HttpResponse response; HttpClient httpclient; InputStream inputStream; List&lt;NameValuePair&gt; nameValuePairs; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); final String android_id = Secure.getString(getApplicationContext().getContentResolver(),Secure.ANDROID_ID); deviceID = android_id; Date now = new Date(); dateStamp = String.valueOf(now); try { httpclient = new DefaultHttpClient(); httppost = new HttpPost("http://99.57.234.12/Main.php"); // Add your data nameValuePairs = new ArrayList&lt;NameValuePair&gt;(2); nameValuePairs.add(new BasicNameValuePair("device_id", deviceID)); nameValuePairs.add(new BasicNameValuePair("install_date", dateStamp)); httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs)); // Execute HTTP Post Request response = httpclient.execute(httppost); inputStream = response.getEntity().getContent(); data = new byte[256]; buffer = new StringBuffer(); int len = 0; while (-1 != (len = inputStream.read(data)) ) { buffer.append(new String(data, 0, len)); } inputStream.close(); } catch (Exception e) { Toast.makeText(LicenseCheck.this, "error"+e.toString(), Toast.LENGTH_LONG).show(); } if(buffer.charAt(0)=='Y') { Toast.makeText(LicenseCheck.this, "working: " + buffer.toString() + ".", Toast.LENGTH_LONG).show(); Move_to_next(); LicenseCheck.this.finish(); } else { Toast.makeText(LicenseCheck.this, "Trial Started", Toast.LENGTH_LONG).show(); Move_to_next(); LicenseCheck.this.finish(); } } public void Move_to_next() { startActivity(new Intent(this, MainMenu.class)); } } </code></pre> <p>Here is the PHP:</p> <pre><code>&lt;?php require_once('Connections.php'); mysql_select_db($database_localhost,$localhost); $device = $_POST['device_id']; $date = $_POST['install_date']; $query_search = "select * from trials where device_id = '".$device."'"; $query_exec = mysql_query($query_search) or die(mysql_error()); $rows = mysql_num_rows($query_exec); if($rows --&gt; 0) { echo "Y"; $result = mysql_query("SELECT device_id,install_date FROM trials WHERE device_id = '".$device."'"); if (!$result) { echo 'Could not run query: ' . mysql_error(); exit; } $row = mysql_fetch_row($result); echo $row[0]; // device_id echo $row[1]; // install_date } else { echo "N"; mysql_query("INSERT INTO trials (device_id, install_date) VALUES ( '".$device."', '".$date."')") or die (mysql_error()); } ?&gt; </code></pre>
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    1. USDEF Software Solutions
    1. USDEF Software Solutions
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    1. COIt looks like you have your answer already, but on the PHP side of things, you really should be using `mysqli_*` functions or `PDO` for making your database calls as `mysql_*` functions are being deprecated. Also you need to sanitize your data before querying the database. You are extremely vulnerable to SQL injection right now.
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      1. USMike Brant
    2. COis it as simple as changing all the mysql_* to mysqli_*?
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    3. COThe is generally a pretty direct correlation between the mysql_* and mysqli_* functions in terms of the function signatures. You should check the PHP site for full information.
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      1. PORemote Databasing
      1. USMike Brant
 

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