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75 lines
1.7 KiB
Markdown
75 lines
1.7 KiB
Markdown
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---
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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_FAILONERROR
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_RESPONSE_CODE (3)
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- CURLOPT_HTTP200ALIASES (3)
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- CURLOPT_KEEP_SENDING_ON_ERROR (3)
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---
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# NAME
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CURLOPT_FAILONERROR - request failure on HTTP response >= 400
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FAILONERROR, long fail);
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~~~
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# DESCRIPTION
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A long parameter set to 1 tells the library to fail the request if the HTTP
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code returned is equal to or larger than 400. The default action would be to
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return the page normally, ignoring that code.
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This method is not fail-safe and there are occasions where non-successful
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response codes slip through, especially when authentication is involved
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(response codes 401 and 407).
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You might get some amounts of headers transferred before this situation is
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detected, like when a "100-continue" is received as a response to a POST/PUT
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and a 401 or 407 is received immediately afterwards.
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When this option is used and an error is detected, it causes the connection to
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get closed and *CURLE_HTTP_RETURNED_ERROR* is returned.
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# DEFAULT
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0, do not fail on error
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# PROTOCOLS
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HTTP
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode ret;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
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ret = curl_easy_perform(curl);
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if(ret == CURLE_HTTP_RETURNED_ERROR) {
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/* an HTTP response error problem */
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}
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}
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}
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~~~
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# AVAILABILITY
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Along with HTTP.
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# RETURN VALUE
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Returns CURLE_OK if HTTP is enabled, and CURLE_UNKNOWN_OPTION if not.
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