Symfony HttpFoundation转PSR7后PATCH请求体为空问题排查

我发送PATCH请求并转换为PSR7格式后，使用OpenAPI PSR-7消息（HTTP请求/响应）验证器验证时失败，错误提示：
Schema(or data) validation failed: All of the required rules must pass for {}

我怀疑问题出在请求本身或Symfony PSR桥接的使用方式上。

curl请求示例 #

curl -X PATCH "http://local.domain/api/v1/path/a60360dc-a32e-49a1-bf03-20bf8c2bbbdf" -H "Content-Type: application/json" -H "Accept: application/json" -d '{"property":"value"}'

HttpFoundation转PSR7的代码 #

$psr17Factory = new \GuzzleHttp\Psr7\HttpFactory();
$psrHttpFactory = new \Symfony\Bridge\PsrHttpMessage\Factory\PsrHttpFactory($psr17Factory, $psr17Factory, $psr17Factory, $psr17Factory);
/** @var \Symfony\Component\HttpFoundation\Request $request */
$psrRequest = $psrHttpFactory->createRequest($request);

调试发现的异常情况 #

调试时观察到，PsrHttpFactory::createRequest()方法中的请求$body（对应v2.2.0版本代码第70行）内容显示正常，但转换完成后：

• $psrRequest->getParsedBody()返回空数组
• $psrRequest->getBody()->getContents()返回空字符串

内容的提问来源于stack exchange，提问作者Jason