Solve the problem of 400 error after enabling CSRF
How to solve the 400 error after enabling CSRF? This article mainly introduces the relevant information about the 400 error that occurs when POSTing data after enabling Csrf. I hope to be helpful.
I've been having this kind of error recently, and I've been looking for the cause. I accidentally saw an article that solved it, and I'd like to share it with everyone.
The first solution is to turn off Csrf
public function init(){
$this->enableCsrfValidation = false;
}The second solution is to add a hidden field to the form
The third solution is to add the _csrf field in AJAX
var csrfToken = $('meta[name="csrf-token"]').attr("content");
$.ajax({
type: 'POST',
url: url,
data: {_csrf:csrfToken},
success: success,
dataType: dataType
});The matching process of Yii and Yii::$app-> ;request->csrfToken Description of the storage location of this value:
Storage location
protected function createCsrfCookie($token)
{
$options = $this->csrfCookie;
$options['name'] = $this->csrfParam;
$options['value'] = $token;
return new Cookie($options);
}Verification method
public function validateCsrfToken($token = null)
{
$method = $this->getMethod();
// only validate CSRF token on non-"safe" methods http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.1.1
if (!$this->enableCsrfValidation || in_array($method, ['GET', 'HEAD', 'OPTIONS'], true)) {
return true;
}
$trueToken = $this->loadCsrfToken();
if ($token !== null) {
return $this->validateCsrfTokenInternal($token, $trueToken);
} else {
return $this->validateCsrfTokenInternal($this->getBodyParam($this->csrfParam), $trueToken)
|| $this->validateCsrfTokenInternal($this->getCsrfTokenFromHeader(), $trueToken);
}
}Related recommendations:
Explanation of knowledge points about the same-origin policy and csrf security policy
Detailed introduction to XSS and CSRF
Yii2.0 defense against csrf attack method
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