错误代码：
Qiniu\Http\Errorresponse:
body: null
duration: 0.005
error: "Could not resolve host: up.qiniu.com"
headers: []
statusCode: -1
Qiniu\Http\Errorurl: "http://up.qiniu.com"

ping up.qiniu.com 能够ping通
ping up.qiniu.com
PING bc-gate-io.qiniu.com (106.38.227.29) 56(84) bytes of data.
64 bytes from 106.38.227.29: icmp_seq=1 ttl=50 time=161 ms
64 bytes from 106.38.227.29: icmp_seq=2 ttl=50 time=180 ms
64 bytes from 106.38.227.29: icmp_seq=3 ttl=50 time=180 ms
64 bytes from 106.38.227.29: icmp_seq=4 ttl=50 time=164 ms
64 bytes from 106.38.227.29: icmp_seq=5 ttl=50 time=167 ms
64 bytes from 106.38.227.29: icmp_seq=7 ttl=50 time=164 ms

这是为何呀？