CURLOPT_KEEP_SENDING_ON_ERROR(3) Library Functions Manual NAME CURLOPT_KEEP_SENDING_ON_ERROR - keep sending on early HTTP response >= 300 SYNOPSIS #include 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), but instead sets "Authorization: NTLM ..." headers manually using CURLOPT_HTTPHEADER(3). 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), CURLOPT_FAILONERROR(3), CURLOPT_HTTPHEADER(3) libcurl April 26 2024 CURLOPT_KEEP_SENDING_ON_ERROR(3)