Node js can not read the data from curl request via php

I have a problem to read the data I sent via curl request in nodejs. With Postman everything is working properly, but when I try to send request via curl, the api return 500 internal server error and I don’t know where is the mistake.

so here is my php code

private function curl($url, $post = false, $header = false)
{
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    if ($post) {
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($post));
    }
    curl_setopt($ch, CURLOPT_HEADER, [
        'Content-Type: application/json',
        'Accept: application/json',
        'Content-Length: ' . mb_strlen(json_encode($post))
    ]);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $response = curl_exec ($ch);
    curl_close($ch);
    return $response;
}

so now I will share with you the part of nodejs

console.log(req.body)
    let content = req.body.content
    if (!content.length) {
        return res.status(401).send({message: 'content is required'})
    }

and here is the log info

{ '{"content":"content information"}': '' }

2020-08-18T07:27:38.191100+00:00 app[web.1]: TypeError: Cannot read property ‘length’ of undefined. I don’t know where is my mistake, and why I can not read json data on node js, any help will be appriciate.

Answer

It would appear that you are not properly adding the body to your request in php/curl. As a result, req.body.content is undefined. Accessing a property on undefined throws your error, so you need to check for that possibility in your JS code, but the real issue in your system is that you aren’t sending a body in php. Hopefully that helps you get to the root of the problem and you can figure out how to attach the body data to your request from there.