ROA Request invalid signature : resolveBody never add Content-MD5 if isset $this->options['body']

• PHP Version:
• 8.1
• Platform:
• Magento 2.4.6
• Product:
• CloudAPI
• Product Version:
• 2016-07-14
• API:
• ROA request

original code: got error invalid signature because Content-MD5 never add to headers in resolveParameter.

$req = AlibabaCloud::roa()
              ->product('CloudAPI')
              ->version('2016-07-14')
              ->host($this->config('host'))
              ->pathPattern($this->config('path'))
              ->scheme('https')
              ->options(['headers' =>['Content-Type'=>'application/json']])
              ->method('POST')
              ->body($body)
              ->debug(1);
  $req->resolveParameter();
  $res = $req->request();

fixed by below: add Content-MD5 myself

$req = AlibabaCloud::roa()
              ->product('CloudAPI')
              ->version('2016-07-14')
              ->host($this->config('host'))
              ->pathPattern($this->config('path'))
              ->scheme('https')
              ->options(['headers' => 
                   ['Content-Type'=>'application/json','Content-MD5' => base64_encode(hex2bin(md5($body)))]])
              ->method('POST')
              ->body($body)
              ->debug(1);
  $req->resolveParameter();
  $res = $req->request();

what I found:

/vendor/alibabacloud/client/src/Request/RoaRequest.php

private function resolveBody()
{
        // If the body has already been specified, it will not be resolved.
        if (isset($this->options['body'])) {
            return;
        }
        ......
}

should be :

private function resolveBody()
{
        // If the body has already been specified, it will not be resolved.
        if (isset($this->options['body'] )
            && Stringy::contains($this->options['headers']['Content-Type'], 'application/json')
        ) {
            $this->options['headers']['Content-MD5'] = base64_encode(hex2bin(md5($this->options['body'], true)));
            return;
        }
        ......
}

BTW:
you are using : ===> not try yet

base64_encode(md5($this->options['body'], true));

I am using: ===> it works

base64_encode(hex2bin(md5($body)))

Line 101:

if (Stringy::contains($this->options['headers']['Content-Type'], 'application/json', false)) {

should be:

if (Stringy::contains($this->options['headers']['Content-Type'], 'application/json')) { 

Start in vendor/alibabacloud/client/src/Request/RoaRequest.php, focusing on resolveBody() and the Content-Type check around line 101. Reproduce the POST ROA request with a body, then verify that Content-MD5 is added and the signature is accepted without manually supplying the header.