Object operation

HeadObject

Returns the object's metadata headers with no body.

HEAD200 on successluzon

Request

Request line

HEAD https://<bucket>-<appid>.cos.luzon.convergecloudcos.com/<key>

Addressed at the bucket host, <bucket>-<appid>.cos.luzon.convergecloudcos.com, where <appid> is the account AppId.

Use it to test existence and read size, ETag and last-modified without transferring the object.

curl

curl -X HEAD \
  -H "Authorization: q-sign-algorithm=sha1&q-ak=…&q-signature=…" \
  "https://<bucket>-<appid>.cos.luzon.convergecloudcos.com/<key>"

Returns 200 with no response body.