Method uploadPartCopy

api-compose-object.go:395–428

uploadPartCopy - helper function to create a part in a multipart upload via an upload-part-copy request https://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPartCopy.html

(ctx context.Context, bucket, object, uploadID string, partNumber int,
	headers http.Header,
)

// upload via an upload-part-copy request
// https://docs.aws.amazon.com/AmazonS3/latest/API/mpUploadUploadPartCopy.html
func (c *Client) uploadPartCopy(ctx context.Context, bucket, object, uploadID string, partNumber int,
	headers http.Header,
) (p CompletePart, err error) {
	// Build query parameters
	urlValues := make(url.Values)
	urlValues.Set("partNumber", strconv.Itoa(partNumber))
	urlValues.Set("uploadId", uploadID)

	// Send upload-part-copy request
	resp, err := c.executeMethod(ctx, http.MethodPut, requestMetadata{
		bucketName:   bucket,
		objectName:   object,
		customHeader: headers,
		queryValues:  urlValues,
	})
	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, bucket, object)
	}

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

// ComposeObject - creates an object using server-side copying
// of existing objects. It takes a list of source objects (with optional offsets)