NAME

       CURLOPT_DOH_URL - provide the DNS-over-HTTPS URL

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_DOH_URL, char *URL);

DESCRIPTION

       Pass in a pointer to a URL for the DOH server to use for name resolving. The parameter should be a char *
       to  a zero terminated string which must be URL-encoded in the following format: "https://host:port/path".
       It MUST specify a HTTPS URL.

       libcurl doesn't validate the syntax or use this variable until the transfer is issued. Even if you set  a
       crazy value here, curl_easy_setopt(3) will still return CURLE_OK.

       curl sends POST requests to the given DNS-over-HTTPS URL.

       To  find  the DOH server itself, which might be specified using a name, libcurl will use the default name
       lookup  function.  You  can  bootstrap  that  by  providing  the  address  for  the   DOH   server   with
       CURLOPT_RESOLVE(3).

       Disable DOH use again by setting this option to NULL.

DEFAULT

       NULL - there is no default DOH URL. If this option isn't set, libcurl will use the default name resolver.

PROTOCOLS

       All

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
         curl_easy_setopt(curl, CURLOPT_DOH_URL, "https://dns.example.com");
         curl_easy_perform(curl);
       }

AVAILABILITY

       Added in 7.62.0

RETURN VALUE

       Returns CURLE_OK on success or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

       Note that curl_easy_setopt(3) won't actually parse the given string so given a bad DOH URL, curl will not
       detect a problem until it tries to resolve a name with it.

SEE ALSO

       CURLOPT_VERBOSE(3), CURLOPT_RESOLVE(3),

libcurl 7.68.0                                 September 06, 2018                             CURLOPT_DOH_URL(3)