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Javascript 我无法在会话中正确保存用户详细信息_Javascript_Ajax_Codeigniter_Session - Fatal编程技术网

Javascript 我无法在会话中正确保存用户详细信息

Javascript 我无法在会话中正确保存用户详细信息,javascript,ajax,codeigniter,session,Javascript,Ajax,Codeigniter,Session,我正在尝试创建聊天框,在登录并保存到数据库后,我无法在会话中正确保存用户id 这是登录功能 public function login() { $this->form_validation->set_rules('email', 'Username', 'trim|required|xss_clean'); $this->form_validation->set_rules('password', 'Password', 'trim|required|x

我正在尝试创建聊天框,在登录并保存到数据库后,我无法在会话中正确保存用户id

这是登录功能

public function login() {

    $this->form_validation->set_rules('email', 'Username', 'trim|required|xss_clean');
    $this->form_validation->set_rules('password', 'Password', 'trim|required|xss_clean');

    if ($this->form_validation->run() == FALSE) {

        // return main page if submitted form is invalid.

        $this->load->view('abt_login');
    } else {

        $this->load->model('abt_db');
        $q = $this->abt_db->check_login(
                $this->input->post('email'), $this->input->post('password')
        );
        if ($q) {

            redirect('index.php/abovetheblues/abt_abovetheblues');
            $this->abt->set_session();
        } else {
            $this->show_login(true);
        }
    }
}
这是我的Javascript代码

$(document).ready(function(){

    $("a#submit").click(function(){

        var chat_message_content = $("input#chat").val();

        if(chat_message_content == ""){

            return false;
        }

        $.post(base_url + "index.php/abovetheblues/add_chat_messages", {
            chat_message_content : chat_message_content, 
            user_id : user_id
        }, 
        function(data){

            alert(data);
        },"json");


        return false;
    });
    return false;

});
这是我的控制器

function add_chat_messages() {
        // Grab the $chat_message_content, $user_id
        $user_id = $this->input->post($this->session->userdata("user_id"));
        $chat_message_content = $this->input->post('chat_message_content');

        $this->abt_db->add_chat_message($user_id, $chat_message_content);
    }
这是我的模型

function check_login($email, $password) {
    $this->load->database();
    // Query to retrieve the user's details
    // based on the received username and password

    $this->db->from('user');
    $this->db->where('email', $email);
    $this->db->where('password', $password);
    $q = $this->db->get()->result();

    // The results of the query are stored in $q.
    // If a value exists, then the user account exists and is validated

    if (is_array($q) && count($q) == 1) {
        // Set the users details into the $details property of this class
        $this->details = $q[0];
        // Call set_session to set the user's session 
        $this->set_session();
        return true;
    }
    return false;
}


   function set_session() {
        // session->set_userdata is a CodeIgniter function that
        // stores data in a cookie in the user's browser.  Some of the values are built in
        // to CodeIgniter, others are added (like the user_id).  
        $this->session->set_userdata(array(
            'user_id' => $this->details->user_id,
            'email' => $this->details->email,
            'username' => $this->details->username,
            'isLoggedIn' => true
                )
        );
    }


function add_chat_message($user_id, $chat_message_content) {

    $query_str = "INSERT INTO chat_message(user_id, chat_message_content) VALUES (?,?,?)";
    $this->db->query($query_str, array($user_id, $chat_message_content));
}
和我的查看页面

<script type="text/javascript">

    var user_id = "<?php echo $this->session->userdata("user_id"); ?>";
var base_url = "<?php echo base_url();?>";



</script>

<!--loads the header-->
<?php $this->load->view('abt-header'); ?>
<!--this is the login page-->

<div data-role="page" id="Abt-chat" data-add-back-btn="true">
    <div data-role="header" data-position="fixed">
        <h1>Peer Chat</h1>

    </div>
    <div data-role="content">

        <div data-role="fieldcontain">
            <div id="chat_viewport"></div>

            <p>
                <label>Input Chat: </label>
                <input name="chat" id="chat" type="text" value=""/>

            </p>

            <p>
                <?php echo anchor('#', 'Send Chat', array('title' => 'Send Chat', 'id' => 'submit')); ?>
            </p>  

        </div> 
        <?php echo form_close(); ?>

    </div>

</div>

var user_id=“”;
var base_url=“”;
同侪聊天

输入聊天:


如果会话中已经定义了用户id,则无需每次通过javascript发送该id,或在页面中将其定义为javascript变量

在控制器中,您必须给出通过javascript传递的变量名,但您调用的是会话数据,它将为您提供id而不是变量名

$user_id = $this->input->post($this->session->userdata("user_id")); // wrong

$user_id = $this->input->post("user_id"); // right

$user_id = $this->session->userdata("user_id"); // this way without pass through javascript

代码中有几个错误:

我从您的型号开始:

if ($q) {
    $this->abt_db->set_session($q);
    redirect('index.php/abovetheblues/abt_abovetheblues');
} else {
    $this->show_login(true);
}
这里最重要的问题是:你不应该在数据库中存储用户的密码,这是一个非常糟糕的做法,使用PHP函数和BLOWFISH散列类型来加密密码,然后将加密版本保存在你的数据库中。有两种类似的方法可能需要考虑。

仔细检查内部评论:

function check_login($email, $password)
{
    $this->load->database();

    $this->db->from('user')
             ->where('email', $email)
             ->where('password', $password); // <-- Check the encryped password

    $q = $this->db->get();

    if ($q->num_rows() == 1) {
        // Set the users details into the $details property of this class
        $this->details = $q->first_row();
         // Call set_session to set the user's session 
        $this->set_session();
        return TRUE;
    }
    return FALSE;
}

function set_session()
{
    $this->session->set_userdata(array(
        'user_id'    => $this->details->user_id,
        'email'      => $this->details->email,
        'username'   => $this->details->username/*,
        // You don't need to store this in session
        // If user is logged-in, his/her user_id would be in session
        // you can easily check whether user is logged-in or not
        // by looking for user_id in session.
        'isLoggedIn' => true*/
    ));
}

function add_chat_message($user_id, $chat_message_content)
{
    // You are binding two parameter to SQL query,
    // But the following query has three question mark.
    // $query_str = "INSERT INTO chat_message(user_id, chat_message_content) VALUES (?,?,?)";
    $query_str = "INSERT INTO chat_message(user_id, chat_message_content) VALUES (?,?)";
    $this->db->query($query_str, array($user_id, $chat_message_content));
}
在您的
Controller/add\u chat\u messages
方法中,使用
$this->input->post($this->session->userdata(“user\u id”)
是错误的

如果用户必须登录网站,则无需通过POST请求传递用户的
id
。只需从会话中阅读即可:

function add_chat_messages()
{
    // The following statement is wrong!
    //$user_id = $this->input->post($this->session->userdata("user_id"));

    $user_id = $this->session->userdata("user_id");
    $chat_message_content = $this->input->post('chat_message_content');

    $this->abt_db->add_chat_message($user_id, $chat_message_content);
}
最后,在客户端,JavaScript部分:

您不需要向服务器发送用户id,因为这些用户可以访问已登录的聊天页面:

$.post(base_url + "index.php/abovetheblues/add_chat_messages", {
    chat_message_content : chat_message_content/*, 
    user_id : user_id*/ // <-- This is not necessary
}, function(data) {
    alert(data);
},"json");
更新#2:

检查登录
设置型号中的会话
功能更改为:

function check_login($email, $password)
{
    $this->load->database();

    $this->db->from('user')
             ->where('email', $email)
             ->where('password', $password);

    $q = $this->db->get();

    if ($q->num_rows() == 1) {
        // Return the users details
        return $q->first_row('array');
    }

    return FALSE;
}

function set_session($details)
{
    $this->session->set_userdata(array(
        'user_id'    => $details['user_id'],
        'email'      => $details['email'],
        'username'   => $details['username']
    ));
}
在您的控制器中

if ($q) {
    $this->abt_db->set_session($q);
    redirect('index.php/abovetheblues/abt_abovetheblues');
} else {
    $this->show_login(true);
}
最后,在JS文件中,从
$.post
方法中删除
json
数据类型

还有一件事,
在blues/add\u chat\u messages
方法上方不向输出发送任何内容(不回显任何内容),因此返回的
数据
为空:

$.post(base\u url+“index.php/overseblues/add\u chat\u messages”{
聊天室信息内容:聊天室信息内容/*,
用户id:用户id*/
},函数(数据){
//数据将是空的
警报(数据);
});

如果您还发布了一个测试URL,那么我们可以查看该站点。如果我必须通过javascriptwith javascript传递它,我该如何编写它?只需添加$user\u id=$this->input->post(“user\u id”);我已经做了这些更正,但它仍然没有在会话中保存用户Id,如果必须通过JavascriptI,我如何发布用户Id?我之前已经这样做了,但仍然不起作用,当我在firebug中查看响应时,它似乎没有在会话中保存用户Id,可能是firebug阻止了它吗?@Omade I高度记录M要存储会话并将
$config['sess\u encrypt\u cookie']
设置为
TRUE
。另外,在
set\u session()
函数中,确保
$this->details->user\u id
存在且不为空(使用
var\u dump
)。对
add\u chat\u message()执行相同的测试
Controller/method for
$user\u id
。这就是我的问题,当我做测试时,user\u id是空的。我怀疑的另一件事是我用Javascript写的ajax帖子,但老实说,我库存充足,不知道该怎么办
if ($q) {
    $this->abt_db->set_session($q);
    redirect('index.php/abovetheblues/abt_abovetheblues');
} else {
    $this->show_login(true);
}