var addr, scheme string

	if hostAddr == "" {
		return "", "", errors.New("unable to process empty address")
	}

	// Simplify the work of url.Parse() and always send a url with
	if !strings.HasPrefix(hostAddr, "http://") && !strings.HasPrefix(hostAddr, "https://") {
		hostAddr = "//" + hostAddr
	}

	// Parse address to extract host and scheme field
	u, err := url.Parse(hostAddr)

errors.cannot_delete_doc_because_of_running=Crawler is running. The document cannot be deleted.
errors.failed_to_delete_doc_in_admin=Failed to delete document.
errors.failed_to_send_testmail=Failed to send the test mail.
errors.could_not_find_backup_index=Could not find index for backup.
errors.no_user_for_changing_password=The current password is incorrect.
errors.failed_to_change_password=Failed to change your password.

		}

		var prevResIps []*cniv1.IPConfig
		if conf.PrevResult != nil {
			prevResult := conf.PrevResult.(*cniv1.Result)
			prevResIps = prevResult.IPs
		}

		// Only send event if this pod "would be" an ambient-watched pod - otherwise skip
		if podIsAmbient {
			cniEventAddr := filepath.Join(conf.CNIAgentRunDir, constants.CNIEventSocketName)

		defer cancel()

		if prefix == "" {
			// if all objects are not deleted yet this call may fail.
			return clnt.RemoveBucket(cctx, bucket)
		}

		objectsCh := make(chan minio.ObjectInfo)

		// Send object names that are needed to be removed to objectsCh
		go func() {
			defer xioutil.SafeClose(objectsCh)
			opts := minio.ListObjectsOptions{
				Prefix:    prefix,
				Recursive: true,
			}

			batchLogIf(ctx, result.Err)
			continue
		}

		// Apply filter to find the matching rule to apply expiry
		// actions accordingly.
		// nolint:gocritic
		if result.Item.IsLatest {
			// send down filtered entries to be deleted using
			// DeleteObjects method
			if len(toDel) > 10 { // batch up to 10 objects/versions to be expired simultaneously.
				xfer := make([]expireObjInfo, len(toDel))
				copy(xfer, toDel)

    opt Tasks
        operation -->> tasks: Send background tasks
    end
    opt Raise other exception
        tasks -->> tasks: Handle exceptions in the background task code
    end
```

/// info | 说明

只会向客户端发送 **一次响应** ，可能是一个错误响应，也可能是来自 *路由函数* 的响应。

在发送了其中一个响应之后，就无法再发送其他响应了。

///

/// tip | 提示

         * response will not read a batched command and therefore
         * the 'received' member of the response object will not
         * be set to true indicating the send and sendTransaction
         * methods that the next part should be sent. This is a
         * very indirect and simple batching control mechanism.
         */

     *            initiated by the client (MSIE post requests after successful NTLM SSP
     *            authentication). If false and the user has not been authenticated yet
     *            the client will be forced to send an authentication (server sends
     *            HttpServletResponse.SC_UNAUTHORIZED).
     * @return True if the negotiation is complete, otherwise false
     * @throws ServletException
     */

// into src - if src is a Reader - to avoid computing the same
// checksums multiple times.
// NewReader enforces S3 compatibility strictly by ensuring caller
// does not send more content than specified size.
func NewReader(ctx context.Context, src io.Reader, size int64, md5Hex, sha256Hex string, actualSize int64) (*Reader, error) {
	return newReader(ctx, src, size, md5Hex, sha256Hex, actualSize, false, nil)

    opt Tasks
        operation -->> tasks: Send background tasks
    end
    opt Raise other exception
        tasks -->> dep: Raise other exception
    end
    Note over dep: After yield
    opt Handle other exception
        dep -->> dep: Handle exception, can't change response. E.g. close DB session.
    end
```

/// info | "Дополнительная информация"