> ## Documentation Index
> Fetch the complete documentation index at: https://www.integrate.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ETL: CCurlPoll

> Continuously poll an authenticated REST API endpoint until a regex pattern matches the response or a timeout is reached. For async API workflows.

## Description

Use this function to make a REST API request continuously until a regular expression is matched or timeout is reached. You'll find it useful with asynchronous API calls that require polling for a status / response URL. Requests are authenticated using an Integrate.io ETL connection.

## Syntax

`CCurlPoll(regex_string,interval, timeout, url, [method, [headers, [request_body, [connection_id]]]])`

## Arguments

*regex\_string* - regular expression string to match the response. If the regular expression is matched, the response is returned by the function.

*interval* - Interval in milliseconds to wait between requests.

*timeout* - Function will timeout after specified timeout (in milliseconds), stop making the requests and return the last response.

*url* (string) - HTTP or HTTPS url for the request.

*method* (string) - HTTP method, such as GET, POST, PUT, DELETE.

*headers* (optional string) - A json string that identifies the request headers key and value in the following manner: `'{"header1" : "value1" , "header2" : "value2"}'`.

*request\_body* (optional string) - The string body of the request (most relevant in the case of POST)

*connection\_id* (optional string) - The unique identifier of the connection to use to execute the query. You can find it in the connection's page.

## Examples

`CCurlPoll('status="(completed|failed)',1000,60000, 'http://api.myapp.com/report/1234/status','GET','{"Accept":"text/json"}','','myapp_83' ) `

## Notes

This function only executes in job runtime. When validating a package with variables that use the function or in X-console, the function returns null.

## Return value datatype

The returned value is a map object that contains the following keys:

* status - response code (integer)
* body - the body of the response (string)
* headers - map object of response headers

## Impact of null value

The regex\_string, interval, timeout, url and method arguments are required. The rest are optional and default to null.