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Querying Object Metadata
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Last updated: 2024-06-25 10:53:13
Querying Object Metadata
Last updated: 2024-06-25 10:53:13
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Overview

This document provides an overview of APIs and SDK code samples related to querying object metadata.
API
Operation
Description
Querying object metadata
Queries the metadata of an object.

SDK API References

For the parameters and method descriptions of all the APIs in the SDK, see SDK API Reference.

Querying Object Metadata

Description

This API is used to query the metadata of an object.

Sample code

String bucket = "examplebucket-1250000000"; // Bucket, formatted as BucketName-APPID
String cosPath = "exampleobject"; // The location identifier of the object in the bucket, i.e., the object key
HeadObjectRequest headObjectRequest = new HeadObjectRequest(bucket, cosPath);
cosXmlService.headObjectAsync(headObjectRequest, new CosXmlResultListener() {
    @Override
    public void onSuccess(CosXmlRequest request, CosXmlResult result) {
        HeadObjectResult headObjectResult = (HeadObjectResult) result;
    }

    // If you use the Kotlin language to call this, please note that the exception in the callback method is nullable; otherwise, the onFail method will not be called back, that is:
    // clientException is of type CosXmlClientException? and serviceException is of type CosXmlServiceException?
    @Override
    public void onFail(CosXmlRequest cosXmlRequest,
                       @Nullable CosXmlClientException clientException,
                       @Nullable CosXmlServiceException serviceException) {
        if (clientException != null) {
            clientException.printStackTrace();
        } else {
            serviceException.printStackTrace();
        }
    }
});
Note:
For more samples, please visit GitHub.
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