---
name: "CURLOPT_KEEP_SENDING_ON_ERROR"
section: "3"
platform: "macos"
package: "curl"
version: "166.0.0.0.1"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_KEEP_SENDING_ON_ERROR"
---

# CURLOPT\_KEEP\_SENDING\_ON\_ERROR(3)

keep sending on early HTTP response \>= 300

## NAME

CURLOPT\_KEEP\_SENDING\_ON\_ERROR - keep sending on early HTTP response \>= 300

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_KEEP_SENDING_ON_ERROR,
                          long keep_sending);
```

## DESCRIPTION

A long parameter set to 1 tells the library to keep sending the request body if the HTTP code returned is equal to or larger than 300. The default action would be to stop sending and close the stream or connection.

This option is suitable for manual NTLM authentication, i.e. if an application does not use *[CURLOPT\_HTTPAUTH(3)](/CURLOPT_HTTPAUTH/3.md)*, but instead sets "Authorization: NTLM ..." headers manually using *[CURLOPT\_HTTPHEADER(3)](/CURLOPT_HTTPHEADER/3.md)*.

Most applications do not need this option.

## DEFAULT

0, stop sending on error

## PROTOCOLS

HTTP

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "sending data");
    curl_easy_setopt(curl, CURLOPT_KEEP_SENDING_ON_ERROR, 1L);
    ret = curl_easy_perform(curl);
  }
}
```

## AVAILABILITY

Along with HTTP. Added in 7.51.0.

## RETURN VALUE

Returns CURLE\_OK if HTTP is enabled, and CURLE\_UNKNOWN\_OPTION if not.

## SEE ALSO

[**CURLINFO\_RESPONSE\_CODE**(3)](/CURLINFO_RESPONSE_CODE/3.md), [**CURLOPT\_FAILONERROR**(3)](/CURLOPT_FAILONERROR/3.md), [**CURLOPT\_HTTPHEADER**(3)](/CURLOPT_HTTPHEADER/3.md)