cURL error 28: Operation timed out after 5000 milliseconds with 0 bytes received

cURL error 28: Operation timed out after 5000 milliseconds with 0 bytes received 

在cUrl传输资源时出现此错误，检查是否是资源过大导致超时 （资源太大，服务器带宽低导致上传超时）

建议使用排除法，换成更小的图片等等资源，测试是否能上传成功

https://curl.se/libcurl/c/libcurl-errors.html