Feature Overview
This document provides an overview of the API and sample code for quickly checking whether an object exists in a bucket. The sample code actually calls the HEAD Object COS API and is a simplified version of the API.
In addition to checking whether an object exists, the primary function of HEAD Object is to return object metadata. To view the SDK interface with the complete functionality of HEAD Object, please refer to Query Object Metadata.
API | Operation | Description |
Querying object metadata | Queries the metadata of an object |
SDK API References
Querying object metadata
Note
This API is used to check whether an object exists in a bucket.
Sample code
Objective-C
// Bucket name in the format of BucketName-APPIDNSString *bucket = @"examplebucket-1250000000";// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "video/xxx/movie.mp4"NSString *object = @"exampleobject";[[QCloudCOSXMLService defaultCOSXML] doesObjectExistWithBucket:bucket object:object];
Note
Swift
// Bucket name in the format of BucketName-APPIDlet bucket = "examplebucket-1250000000";// Object key, i.e., the full path of a COS object. If the object is in a directory, the path should be "video/xxx/movie.mp4"let object = "exampleobject";QCloudCOSXMLService.defaultCOSXML().doesObjectExist(withBucket: bucket, object: object);
Note