我已经设置了服务器以接受电子邮件&密码凭据,我希望我的应用程序使用HttpURLconnection登录。连接部分似乎没问题,因为响应总是200,但我实际上在发送数据时遇到了麻烦。我将json对转换为字符串并通过DataOutputStream发送它。我通过InputStream读取了响应。
我的主要问题是我用InputStream读取的响应总是相同的(登录页面的html),即使电子邮件和密码错误,这让我觉得我没有正确发送数据。
您可以查看我的代码:
import android.content.Context;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.JsonWriter;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.app.ProgressDialog;
import java.io.DataOutputStream;
import java.net.MalformedURLException;
import android.net.Uri;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import android.content.Intent;
import org.json.JSONObject;
import org.json.JSONStringer;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
public class MainActivity extends AppCompatActivity {
private EditText user;
private EditText pswrd;
private Button login;
private String email;
private String password;
private String HOST;
private String DEFAULT_IPADDRESS;
private String PREFERENCES_IPADDRESSSERVER;
private String PREFERENCES_TOKEN;
private Context ctx;
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 15000;
private String sRequest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
user = (EditText) findViewById(R.id.Email);
pswrd = (EditText) findViewById(R.id.Password);
login = (Button) findViewById(R.id.button);
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
email = user.getText().toString();
password = pswrd.getText().toString();
try {
//HttpURLConnection example = serverLogin(email, password);
new AsyncLogin().execute(email, password);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
private class AsyncLogin extends AsyncTask<String, String, String> {
ProgressDialog pdLoading = new ProgressDialog(MainActivity.this);
HttpURLConnection conn;
URL url = null;
@Override
protected void onPreExecute() {
super.onPreExecute();
//this method will be running on UI thread
pdLoading.setMessage("\tLoading...");
pdLoading.setCancelable(false);
pdLoading.show();
}
@Override
protected String doInBackground(String... params) {
try {
// Enter URL address
url = new URL("http://81.169.151.83/users/sign_in");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
}
try {
// Setup HttpURLConnection class to send and receive data
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
conn.setRequestMethod("POST");
// setDoInput and setDoOutput method depict handling of both send and receive
conn.setDoInput(true);
conn.setDoOutput(true);
JSONObject request = new JSONObject();
try {
request.put("email", params[0]);
request.put("password", params[1]);
} catch (org.json.JSONException e) {
e.printStackTrace();
}
sRequest = request.toString();
// Open connection for sending data
conn.connect();
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(sRequest);
wr.flush();
wr.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return "exception";
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
// Pass data to onPostExecute method
return (result.toString());
} else {
return ("unsuccessful");
}
} catch (IOException e) {
e.printStackTrace();
return "exception";
} finally {
conn.disconnect();
}
}
@Override
protected void onPostExecute(String result) {
//this method will be running on UI thread
pdLoading.dismiss();
if (result.equalsIgnoreCase("true")) {
/* Here launching another activity when login successful. If you persist login state
use sharedPreferences of Android. and logout button to clear sharedPreferences.
*/
Toast.makeText(MainActivity.this, "GREAT SUCCESS", Toast.LENGTH_LONG).show();
/* Intent intent = new Intent(MainActivity.this,SuccessActivity.class);
startActivity(intent);
MainActivity.this.finish();*/
} else if (result.equalsIgnoreCase("false")) {
// If username and password does not match display a error message
Toast.makeText(MainActivity.this, "Invalid email or password", Toast.LENGTH_LONG).show();
} else if (result.equalsIgnoreCase("exception") || result.equalsIgnoreCase("unsuccessful")) {
Toast.makeText(MainActivity.this, "OOPs! Something went wrong. Connection Problem.", Toast.LENGTH_LONG).show();
}
}
}
由于
答案 0 :(得分:0)
我建议您尝试OKHTTP,查看他们的recipes,在Android中执行GET / POST请求要简单得多。
另外,我已经在http://81.169.151.83/users/sign_in检查了您的网站,登录表单中使用的参数是用户[email]和用户[密码]。不是您在上面添加的电子邮件和密码。还有其他几个表单字段,例如authenticity_token,这可能是原因。