Provided by: libcurl4-doc_7.55.1-1ubuntu2_all bug

NAME

       CURLOPT_FAILONERROR - request failure on HTTP response >= 400

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FAILONERROR, long fail);

DESCRIPTION

       A  long parameter set to 1 tells the library to fail the request if the HTTP code returned
       is equal to or larger than 400. The default action would be to return the  page  normally,
       ignoring that code.

       This  method  is not fail-safe and there are occasions where non-successful response codes
       will slip through, especially when authentication is  involved  (response  codes  401  and
       407).

       You  might get some amounts of headers transferred before this situation is detected, like
       when a "100-continue" is received as a response to a POST/PUT and a 401 or 407 is received
       immediately afterwards.

       When  this  option  is  used and an error is detected, it will cause the connection to get
       closed and CURLE_HTTP_RETURNED_ERROR is returned.

DEFAULT

       0, do not fail on error

PROTOCOLS

       HTTP

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         CURLcode ret;
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
         ret = curl_easy_perform(curl);
         if(ret == CURLE_HTTP_RETURNED_ERROR) {
           /* a HTTP response error problem */
         }
       }

AVAILABILITY

       Along with HTTP.

RETURN VALUE

       Returns CURLE_OK if HTTP is enabled, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_HTTP200ALIASES(3), CURLOPT_KEEP_SENDING_ON_ERROR(3),