Method copyObjectPartDo

api-compose-object.go:342–390

(ctx context.Context, srcBucket, srcObject, destBucket, destObject, uploadID string,
	partID int, startOffset, length int64, metadata map[string]string,
)

}

func (c *Client) copyObjectPartDo(ctx context.Context, srcBucket, srcObject, destBucket, destObject, uploadID string,
	partID int, startOffset, length int64, metadata map[string]string,
) (p CompletePart, err error) {
	headers := make(http.Header)

	// Set source
	headers.Set("x-amz-copy-source", s3utils.EncodePath(srcBucket+"/"+srcObject))

	if startOffset < 0 {
		return p, errInvalidArgument("startOffset must be non-negative")
	}

	if length >= 0 {
		headers.Set("x-amz-copy-source-range", fmt.Sprintf("bytes=%d-%d", startOffset, startOffset+length-1))
	}

	for k, v := range metadata {
		headers.Set(k, v)
	}

	queryValues := make(url.Values)
	queryValues.Set("partNumber", strconv.Itoa(partID))
	queryValues.Set("uploadId", uploadID)

	resp, err := c.executeMethod(ctx, http.MethodPut, requestMetadata{
		bucketName:   destBucket,
		objectName:   destObject,
		customHeader: headers,
		queryValues:  queryValues,
	})
	defer closeResponse(resp)
	if err != nil {
		return p, err
	}

	// Check if we got an error response.
	if resp.StatusCode != http.StatusOK {
		return p, httpRespToErrorResponse(resp, destBucket, destObject)
	}

	// Decode copy-part response on success.
	cpObjRes := copyObjectResult{}
	err = xmlDecoder(resp.Body, &cpObjRes)
	if err != nil {
		return p, err
	}
	p.PartNumber, p.ETag = partID, cpObjRes.ETag
	return p, nil
}

// uploadPartCopy - helper function to create a part in a multipart
// upload via an upload-part-copy request