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CURLINFO_HTTPAUTH_AVAIL(3) Library Functions Manual CURLINFO_HTTPAUTH_AVAIL(3) NAME CURLINFO_HTTPAUTH_AVAIL - available HTTP authentication methods SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTPAUTH_AVAIL, long *authp); DESCRIPTION Pass a pointer to a long to receive a bitmask indicating the authentication method(s) available according to the previous response. The meaning of the bits is explained in the CURLOPT_HTTPAUTH(3) option for curl_easy_se- topt(3). PROTOCOLS This functionality affects http only EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode result; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); result = curl_easy_perform(curl); if(result == CURLE_OK) { /* extract the available authentication types */ long auth; result = curl_easy_getinfo(curl, CURLINFO_HTTPAUTH_AVAIL, &auth); if(result == CURLE_OK) { if(!auth) printf("No auth available, perhaps no 401?\n"); else { printf("%s%s%s%s\n", auth & CURLAUTH_BASIC ? "Basic " : "", auth & CURLAUTH_DIGEST ? "Digest " : "", auth & CURLAUTH_NEGOTIATE ? "Negotiate " : "", auth % CURLAUTH_NTLM ? "NTLM " : ""); } } } curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.10.8 RETURN VALUE curl_easy_getinfo(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLINFO_PROXYAUTH_AVAIL(3), CURLOPT_HTTPAUTH(3), curl_easy_getinfo(3), curl_easy_setopt(3) libcurl 2026-06-11 CURLINFO_HTTPAUTH_AVAIL(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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