HEAD Object
returns object metadata. To view the SDK API that contains the full functionality of HEAD Object
, please see Querying Object Metadata.func (s *ObjectService) IsExist(ctx context.Context, key string, id ...string) (isExist bool, err error)
package mainimport ("context""fmt""github.com/tencentyun/cos-go-sdk-v5""net/http""net/url""os")func main(){// Bucket name in the format of `BucketName-APPID` (`APPID` is required), which can be viewed in the COS console at https://console.tencentcloud.com/cos5/bucket.// Replace it with your region, which can be viewed in the COS console at https://console.tencentcloud.com/. For more information about regions, visit https://www.tencentcloud.com/document/product/436/6224.u, _ := url.Parse("https://examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com")b := &cos.BaseURL{BucketURL: u}client := cos.NewClient(b, &http.Client{Transport: &cos.AuthorizationTransport{// Get the key from environment variables// Environment variable `SECRETID` refers to the user's `SecretId`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.SecretID: os.Getenv("SECRETID"), // User `SecretId`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.// Environment variable `SECRETKEY` refers to the user's `SecretKey`, which can be viewed in the CAM console at https://console.tencentcloud.com/cam/capi.SecretKey: os.Getenv("SECRETKEY"), // User `SecretKey`. We recommend you use a sub-account key and follow the principle of least privilege to reduce risks. For information about how to obtain a sub-account key, visit https://www.tencentcloud.com/document/product/598/37140?from_cn_redirect=1.},})key := "exampleobject"ok, err := client.Object.IsExist(context.Background(), key)if err == nil && ok {fmt.Printf("object exists\\n")} else if err != nil {fmt.Printf("head object failed: %v\\n", err)} else {fmt.Printf("object does not exist\\n")}}
Parameter | Description | Type | Required |
key | Object key, the unique identifier of an object in a bucket. For example, if the object endpoint is examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com/doc/pic.jpg , its object key is doc/pic.jpg | string | Yes |
id | VersionId of the object | String | No |
Parameter | Description | Type |
isExist | Whether the object exists | Bool |
err | Whether the request is successful | Struct |
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