Question

I’m write a Android App which based LAMP.
There is a login function in the app.
All of operation functions are perfect. But,

Why Linux makes session files everytimes
only when I connect on phone which utilizing httpURLConnection ???

When I connect web page without login by WebBrowser(Chrome),
The Linux makes Session file it’s empty <—(A)

And then, I connect web page with login by WebBrowser(Chrome) too,
The Linux makes Session file which appended in the (A) session file.

so. result. If I use webbrowser, linux makes session file, only 1.

But!
When I connect on the phone(app),
Linux makes session file everytimes If I login,

It means

App login -> (Linux makes session)
backpress -> App Login -> (Linux makes session)
backpress -> App Login -> (Linux makes session)

** I checked PHPSESSID in Logcat, and Cache SQL, utilizing cookie sync manager

Android HttpURLConnection Header Part Source

    URL urlLogin = new URL(url);
    HttpURLConnection httpConn = (HttpURLConnection) urlLogin.openConnection();
    httpConn.setDefaultUseCaches(true);
    httpConn.setDoInput(true);
    httpConn.setDoOutput(true);
    httpConn.setUseCaches(true);
    httpConn.setInstanceFollowRedirects(false);
    httpConn.setRequestMethod("POST");
    httpConn.setRequestProperty("content-type", "application/x-www-form-urlencoded;charset=utf-8");
    httpConn.setRequestProperty("Connection", "keep-alive");

PHP Login server part

<?php
session_start();
require_once "dbconn.php";
require_once "check.php";
require_once "process.php";

$email = $_POST['email'];
$pw = $_POST['pw'];

$process = new Process($_POST);

if ($process->checkLogin()) { //Check Login matches
    $_SESSION['email'] = $email;
    $_SESSION['pw'] = $pw;
    $_SESSION['logged'] = true;

    $errcode = 100;
}

Answer 1

Assuming “session file” == “session cookie”, perhaps you have not enabled cookie management for HttpUrlConnection. As is described in the documentation, you need to use CookieHandler and CookieManager for this:

CookieManager cookieManager = new CookieManager();
CookieHandler.setDefault(cookieManager);