[英]adding data to online DB using php script and httppost from android
[英]Android HTTPPOST executing PHP script twice
我正在开发一个基本的Android APK,它将成为我运行的网站的基本移动版本。 APK的一部分使人们可以注册用户帐户(基本注册)。 我正在使用HTTPPOST将用户表单信息发送到PHP脚本。 我所有的错误检查都能正常工作(密码匹配,长度等),但是从有效提交中得到的响应中,我可以告诉它尝试两次运行PHP。 APK会收到一条错误消息,并告诉用户已使用了用户名和密码,但这是因为php获得了运行用户名和密码,然后插入了数据,然后由于某种原因再次运行了,并且报告了错误捕获,而不仅仅是在首次运行时报告成功。 如果取出错误捕获以查找重复的用户名和电子邮件,则可以在数据库中看到两个插入。 为什么PHP页面两次运行?
脚步:
结果
APK收到显示错误消息,提示已使用用户名和密码。 SQL数据库显示已插入表单中的信息。
档案
我将登录记录在APK中,似乎只调用一次HTTPPOST。 以下是JAVA文件和PHP页面。 任何煽动将不胜感激。
JAVA文件
Register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("Registration: ", "Button Pressed");
dialog = ProgressDialog.show(Register.this, "",
"Creating account...", true);
new Thread(new Runnable() {
public void run() {
new RegisterUser().execute("");
}
}).start();
}
});
}
private class RegisterUser extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... arg0) {
try {
httpclient = new DefaultHttpClient();
// This is the page that will get all the information to create the account
HTTPPOST = new HttpPost("http://www.linetomyphppage.php");
NAMEVALUEPAIRS = new ArrayList<NameValuePair>();
NAMEVALUEPAIRS.add(new BasicNameValuePair("username",username.getText().toString().trim())); // $Edittext_value = $_POST['Edittext_value'];
NAMEVALUEPAIRS.add(new BasicNameValuePair("userEmail",emailaddress.getText().toString().trim()));
NAMEVALUEPAIRS.add(new BasicNameValuePair("password1",password1.getText().toString().trim()));
NAMEVALUEPAIRS.add(new BasicNameValuePair("password2",password2.getText().toString().trim()));
NAMEVALUEPAIRS.add(new BasicNameValuePair("newsletter",subscribe));
HTTPPOST.setEntity(new UrlEncodedFormEntity(NAMEVALUEPAIRS));
HTTPRESPONSE = httpclient.execute(HTTPPOST);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(HTTPPOST, responseHandler);
Log.d("Registration: ", "Executing Post");
errorcode = response;
// Redirect the user depending on the response
if (response.equalsIgnoreCase("success")) {
// Toast.makeText(Register.this, "Registration successful", Toast.LENGTH_SHORT).show();
Log.d("Registration: ", "Registration successful");
valid = "Successful";
} else {
Log.d("Registration: ", "Registration failed");
valid = "Invalid";
// Toast.makeText(Register.this, "Registration failed: " + response, Toast.LENGTH_SHORT).show();
}
} catch (Exception e) {
System.out.println("Exception here : " + e);
}
dialog.dismiss();
return "Executed";
}
@Override
protected void onPostExecute(String result){
if(valid.equalsIgnoreCase("Invalid")){
Log.d("Registration: ", "Error generated");
String code = errorcode.replace("Invalid","");
Toast.makeText(Register.this, "Registration failed: " + code, Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(Register.this, "Registration successful", Toast.LENGTH_SHORT).show();
startActivity(new Intent(Register.this, HomeScreen.class));
finish();
}
}
}
PHP方面
<?php
// Connecting to database
$connect = $_SERVER['DOCUMENT_ROOT'];
$connect .= "pathtoconnect.php";
include_once($connect);
// Get all the variables being passed from the APK
$username = mysql_real_escape_string($_POST['username']);
$password1 = mysql_real_escape_string($_POST['password1']);
$password2 = mysql_real_escape_string($_POST['password2']);
$email = mysql_real_escape_string($_POST['userEmail']);
$newsletter = mysql_real_escape_string($_POST['newsletter']);
$pass = 1;
$error = false;
// Check if the username is valid.
if (preg_match('/[^0-9a-z-_]/i', $username) == 1) {
$error = 'You can not use spaces or strange characters in a usermame.';
$pass = 0;
}
if(strlen($username) < 5) { // Ensure the length is at least 5
$error = 'Username must be at least 5 characters.';
$pass= 0 ;
}
if(strlen($password1) < 5) { // Ensure the length is at least 5
$error = 'Passwords have to be at least slightly challenging (5+ characters).';
$pass= 0 ;
}
if($password1 != $password2) { // Check for passwords to match
$error = "Your passwords did not match. Please try again.";
$pass= 0 ;
}
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { // Check to make sure email address is valid
$error = "The email address you entered is not valid. Double check it.";
$pass= 0 ;
}
// check if username or email is already in use
$checking = mysql_query("SELECT COUNT(user_id) AS total FROM users WHERE username='$username' OR email='$email'");
$checking = mysql_fetch_array($checking);
if($checking['total'] > 0) {
$error = 'The username or email you are trying to use is already in use. Please go to the website if you forgot your password to reset it.';
$pass= 0 ;
}
if(!$error) {
echo 'success';
$time = time();
mysql_query("INSERT INTO users (username, password, email, date_created, subscription) VALUES ('$username', md5('$password1'), '$email', '$time', '$subscribe')");
}
else {
echo 'Invalid'.$error;
}
?>
该设备正在报告重复错误,并且正如我提到的那样,数据已插入,因此不会像“成功”那样被回显。 以下是JAVA文件中的日志,显示了该日志仅得到失败的响应。
02-04 22:31:37.442 26159-26159/com.demo D/Registration:﹕ Button Pressed
02-04 22:31:37.862 26159-26559/com.demo D/Registration:﹕ Executing Post
02-04 22:31:37.862 26159-26559/com.demo D/Registration:﹕ Registration failed
02-04 22:31:37.872 26159-26159/com.demo D/Registration:﹕ Error generated
我建立了一个基本的html表单来传递数据,该方法效果很好,一次执行了php,所以我很茫然。 Android / JAVA对我来说是新手,所以这是实现此目的的错误途径吗?
谢谢
您两次调用“ httpclient.execute(..)”:
HTTPRESPONSE = httpclient.execute(HTTPPOST);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(HTTPPOST, responseHandler);
删除其中之一应该可以解决您的问题:)
您不需要将AsynTask子类(RegisterUser)调用到线程中,因为它是一个线程itelt,它耗尽了主要的IU线程。 只需调用execute方法。
而不是做:
new Thread(new Runnable() {
public void run() {
new RegisterUser().execute("");
}
}).start();
做:
new RegisterUser().execute("");
可能可以解决问题。
此外,您将从DefaultHttpClient对象的第一行和第三行调用两次execute方法:
HTTPRESPONSE = httpclient.execute(HTTPPOST);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
final String response = httpclient.execute(HTTPPOST, responseHandler);
它不是一个真正的答案,但是我将代码转换为使用JSON请求而不是httppost方法,并且效果更好。
Log.d("JSON", "Running the JSON script");
JSONObject json = jsonParser.makeHttpRequest(url_register, "POST", params);
//Getting specific Response
try {
RESPONSE_STATUS = json.getInt("success");
RESPONSE_MESSAGE = json.getString("message");
} catch (JSONException e) {
RESPONSE_MESSAGE = "An error has occured during the registration";
e.printStackTrace();
}
Log.d("JSON", json.toString());
Log.d("Registration: ", "Response Status: " + RESPONSE_STATUS);
Log.d("Registration: ", "Response: " + RESPONSE_MESSAGE);
// Redirect the user depending on the response
if (RESPONSE_STATUS == 1) {
Log.d("Registration: ", "Registration successful");
valid = "Successful";
} else {
Log.d("Registration: ", "Registration failed");
valid = "Invalid";
}
确实需要完全重写php才能将响应代码更改为数组。
同样,这不能解决我的原始问题,但是是一种可行的替代方法。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.