再次提交失败请求的最佳实践

Question

我的<?php $variable = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; class ContactIntegration { public $default_payload = array(); function __construct($formOrigem) { $this->default_payload['form_origem'] = $formOrigem; } } $contactIntegration = new ContactIntegration($variable); 类如下。

ApiHttpClient.java

AsyncHttpClient

在我的活动中

MainActivity.java

package virtualsystems.com.br.financial.client;

import android.content.Context;
import android.util.Log;

import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.RequestParams;

import cz.msebera.android.httpclient.Header;
import cz.msebera.android.httpclient.HttpRequestInterceptor;
import cz.msebera.android.httpclient.HttpResponseInterceptor;
import cz.msebera.android.httpclient.impl.client.DefaultHttpClient;

public class ApiHttpClient {
    private static final String BASE_URL = "http://MY_IP_LOCAL_NETWORK/";
    private static final Integer RETRY_COUNT = 2;
    private static final Integer RETRY_DELAY = 500;
    private static final Boolean URL_ENCODING = true;

    private static AsyncHttpClient client = new AsyncHttpClient();

    public ApiHttpClient() {
        client.addHeader("Content-Type", "application/json");
        client.addHeader("Accept", "application/json");
        client.setUserAgent("Apache-HttpClient-AsyncHttpClient (Linux; Android 6.0) UNAVAILABLE (Java/0) Mobile");
        client.setURLEncodingEnabled(URL_ENCODING);
        client.setMaxRetriesAndTimeout(RETRY_COUNT, RETRY_DELAY);
    }

    private static String getAbsoluteUrl(String relativeUrl) {
        return BASE_URL + relativeUrl;
    }

    public static void get(Context context, String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
        client.get(context, getAbsoluteUrl(url), params, responseHandler);
    }

    public static void post(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
        client.post(getAbsoluteUrl(url), params, responseHandler);
    }

    public static void delete(Context context, String url, Header[] headers, RequestParams params, AsyncHttpResponseHandler responseHandler) {
        client.delete(context, getAbsoluteUrl(url), headers, params, responseHandler);
    }

    public static void put(Context context, String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {
        client.put(context, getAbsoluteUrl(url), params, responseHandler);
    }

    public static void addResponseInterceptor(HttpResponseInterceptor interceptor) {
        Log.d("ApiHttpClient", client.getHttpClient().getClass().getName());
        Log.d("ApiHttpClient", "is DefaultHttpClient: " + (client.getHttpClient() instanceof DefaultHttpClient));
        DefaultHttpClient defaultHttpClient = (DefaultHttpClient) client.getHttpClient();
        defaultHttpClient.addResponseInterceptor(interceptor);
    }

    public static void addRequestInterceptor(HttpRequestInterceptor interceptor) {
        Log.d("ApiHttpClient", client.getHttpClient().getClass().getName());
        Log.d("ApiHttpClient", "is DefaultHttpClient: " + (client.getHttpClient() instanceof DefaultHttpClient));
        DefaultHttpClient defaultHttpClient = (DefaultHttpClient) client.getHttpClient();
        defaultHttpClient.addRequestInterceptor(interceptor);
    }
}

当令牌过期时，API返回包含package virtualsystems.com.br.financial; import android.annotation.SuppressLint; import android.content.Intent; import android.os.Bundle; import android.os.StrictMode; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.support.design.widget.NavigationView; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.bumptech.glide.Glide; import com.bumptech.glide.request.RequestOptions; import com.loopj.android.http.AsyncHttpResponseHandler; import java.io.IOException; import cz.msebera.android.httpclient.Header; import cz.msebera.android.httpclient.HttpException; import cz.msebera.android.httpclient.HttpRequest; import cz.msebera.android.httpclient.HttpRequestInterceptor; import cz.msebera.android.httpclient.client.HttpClient; import cz.msebera.android.httpclient.impl.client.HttpClientBuilder; import cz.msebera.android.httpclient.protocol.HttpContext; import virtualsystems.com.br.financial.client.ApiHttpClient; public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { ApiHttpClient apiHttpClient = new ApiHttpClient(); UserSession userSession = UserSession.getInstance(MainActivity.this); @SuppressLint("CheckResult") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);UserSession userSession = UserSession.getInstance(getApplicationContext()); setSupportActionBar(toolbar); DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); ActionBarDrawerToggle toggle = new ActionBarDrawerToggle( this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); drawer.addDrawerListener(toggle); toggle.syncState(); NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); navigationView.setNavigationItemSelectedListener(this); View headerView = navigationView.getHeaderView(0); TextView navUsername = (TextView) headerView.findViewById(R.id.nav_header_username); TextView navEmail = (TextView) headerView.findViewById(R.id.nav_header_email); ImageView navAvatar = (ImageView) headerView.findViewById(R.id.nav_header_avatar); navUsername.setText(userSession.getUserName()); navEmail.setText(userSession.getUserEmail()); String imgURL = (String) userSession.getUserAvatar(); RequestOptions requestOptions = new RequestOptions(); requestOptions.placeholder(R.mipmap.ic_launcher_round); requestOptions.error(R.mipmap.ic_launcher_round); Glide.with(this) .load(imgURL) .apply(requestOptions) .into(navAvatar); displayFragment(R.id.nav_home); } @Override public void onBackPressed() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawer(GravityCompat.START); } else { super.onBackPressed(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { Toast.makeText(this, "Settings Clicked", Toast.LENGTH_SHORT).show(); return true; } return super.onOptionsItemSelected(item); } @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { // Handle navigation view item clicks here. int id = item.getItemId(); displayFragment(id); return true; } private void displayFragment(int itemId){ Fragment fragment = null; switch (itemId){ case R.id.nav_categories: fragment = new Categories(); break; case R.id.nav_home: fragment = new BillsTotal(); break; case R.id.nav_bills: fragment = new Bills(); break; case R.id.nav_logout: logoutUser(); break; } if (fragment != null){ FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); ft.replace(R.id.content_frame, fragment); ft.commit(); } DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); drawer.closeDrawer(GravityCompat.START); } private void logoutUser() { apiHttpClient.addRequestInterceptor(new HttpRequestInterceptor() { @Override public void process(HttpRequest request, HttpContext context) throws HttpException, IOException { request.addHeader("Authorization", "Bearer " + userSession.getUserToken()); } }); apiHttpClient.post("api/logout", null, new AsyncHttpResponseHandler(){ String responseMessage = ""; @Override public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) { responseMessage = "Disconected"; } @Override public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) { switch (statusCode){ case 400: responseMessage = "Bad Request - Invalid Token"; break; case 401: responseMessage = "Unauthorized - Invalid Token"; break; case 500: responseMessage = "Could not Invalidate Token"; break; default: String errorCode = ((Integer) statusCode).toString(); String errorMsg = responseBody.toString(); responseMessage = "Error: " + errorCode + "\n" + errorMsg; break; } } @Override public void onFinish() { super.onFinish(); userSession.clearSession(); Toast.makeText(getApplicationContext(), responseMessage, Toast.LENGTH_SHORT).show(); startActivity(new Intent(getApplicationContext(), LoginActivity.class)); } }); } } 和错误 401 的 JSONObject 。

在 logoutUser（）方法中，我使用switch处理错误。如果由于令牌过期而导致请求失败（ onFailure ），并且返回了错误 401 ，那么发送 POST 的最佳方法是什么例如，请求更新令牌，然后重新发送注销请求。