Codeigniter CSRF仅在一次Ajax请求中有效 [英] Codeigniter CSRF valid for only one time ajax request

问题描述

我想在发生jQuery更改事件时在服务器上上传图像，但是使用codeigniter csrf我只能上传图像一次.如何使用Ajax上传图像以进行多个请求.设置此设置时请记住

I want to upload image on the server on change event of jQuery but using codeigniter csrf I am able to upload image only one time. How can I upload images using ajax for multiple requests.Please keep in mind when I set this

config['csrf_protection'] = FALSE;

然后我可以发送多个请求jQuery onchange事件，但是当csrf_protection将为false时，我认为csrf没有任何优势.所以问题是启用csrf_protection时如何使用ajax发送多个请求.我的jquery代码如下

then I am able to send multiple request jQuery onchange event but when csrf_protection is going to be false then I think there is no advantage of csrf. so the question is how can I send multiple requests using ajax while csrf_protection is enable. My jquery code is following

$("#avatar").change(function(){
    var link = $("#avatar").val();     
    $.ajax({
        url : "<?php echo base_url('main/test'); ?>",
        type: 'post',
        data: {'<?php echo $this->security->get_csrf_token_name(); ?>':'<?php echo $this->security->get_csrf_hash(); ?>',"id":"hello","link":link},            
        success : function(data)
        {   
            alert(data);
        }  
    });
});

推荐答案

我认为您应该尝试重新创建每个请求的csrf令牌

In my opinion you should try to recreate your csrf token each request

尝试下面的代码示例...

Try this code example...

对于js函数

var csrfName = '<?php echo $this->security->get_csrf_token_name(); ?>',
    csrfHash = '<?php echo $this->security->get_csrf_hash(); ?>';
("#avatar").change(function(){
    var link = $("#avatar").val();

    var dataJson = { [csrfName]: csrfHash, id: "hello", link: link };

    $.ajax({
        url : "<?php echo base_url('main/test'); ?>",
        type: 'post',
        data: dataJson,            
        success : function(data)
        {   
            csrfName = data.csrfName;
            csrfHash = data.csrfHash;
            alert(data.message);
        }  
    });
});

和控制器

public function test() { 
    $config['upload_path'] = './uploads/'; 
    $config['allowed_types'] = 'gif|jpg|png'; 
    $config['max_size'] = 500; 
    $config['max_width'] = 260; 
    $config['max_height'] = 260; 

    $reponse = array(
                'csrfName' => $this->security->get_csrf_token_name(),
                'csrfHash' => $this->security->get_csrf_hash()
                )

    $this->load->library('upload', $config); 
    if (!$this->upload->do_upload('link')) { 
        $reponse['message'] = "error"; 
    } 
    else { 
        $data = array('upload_data' => $this->upload->data()); 
        $image_name = $data['upload_data']['file_name']; 
        $reponse['message'] = $image_name; 
    } 

    echo json_encode($reponse);
}

让我知道，祝你好运

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