# fetch

{% embed url="<https://learn.javascript.ru/fetch>" %}

```python
# ------------------------------------------------------------------------------
def send_response(code, **data):
	"""
	"""
	response = {}  # словник-відповідь в JS
	response['code'] = code
	response['data'] = data

	log.debug(f'Send Response = {response}')
	print(json.dumps(response))
	sys.exit(code)
#def

max_num = _db.query('list', 'SELECT MAX(act) FROM receipt')
if _db.error:
	send_response( 301, **{
		'mess'  : tr('ERR_DB'),
		'debug' : _db.errmsg if int(_conf.get('debug')) else ''
	})
else:
	max_num = max_num[0][0]  # query('list',...) повертає [(N,)]
	log.debug(max_num)
	if max_num is None:
		# коли ще нема записів - NULL
		next_num = 1;
	else:
		next_num = int(max_num) + 1
		# next_num = int(max_num) + 1  # query з 'list' повертає [(N,)]

	log.debug(f'SQL-запит 401 ОК')
	send_response( 0, **{
		'mess' : 'ok',
		'num'  : next_num,
	})


```

```javascript
const ERR_RUNTIME          = '{{ ERR_RUNTIME }}';
const SRV_REFUSED_REQUEST  = '{{ SRV_REFUSED_REQUEST }}'
const SRV_UNKNOWN_RESPONSE = '{{ SRV_UNKNOWN_RESPONSE }}';

/* --------------------------------------------------------------------- */
function get_next_number() {

    function _success(responce) {
        if (responce && 'code' in responce && 'data' in responce)
        {
            if (responce.code == 0)
            {
                if ('num' in responce.data)
                    nNumb.value = responce.data.num;
            }
            else
            {
                alert('danger', responce.data.mess);
                if (responce.data.debug)
                    console.log(responce.data.debug);
            }
        }
        else
            alert('danger', SRV_UNKNOWN_RESPONSE);

        buttons_disabled(true);
    }

    fetch("/equip/receiptgetnum/", { method: "POST"})
    .then(resp => {
        if (resp.status != 200) {
            alert('danger', SRV_REFUSED_REQUEST +` Status: ${resp.status}`);
        }
        return resp.json();
    })
    .then(resp => _success(resp))
    .catch(err => {
            console.dir(err)
            alert('danger', ERR_RUNTIME)
        });
}

```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://olexsyn.gitbook.io/enote/progr/javascript/fetch.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.