The API allows the application to set individual parts of a URL held in the
CURLU handle, either after having parsed a full URL or instead of parsing
such.
rc = curl_url_set(urlp, CURLUPART_HOST, "www.example.com", 0);
rc = curl_url_set(urlp, CURLUPART_SCHEME, "https", 0);
rc = curl_url_set(urlp, CURLUPART_USER, "john", 0);
rc = curl_url_set(urlp, CURLUPART_PASSWORD, "doe", 0);
rc = curl_url_set(urlp, CURLUPART_PORT, "443", 0);
rc = curl_url_set(urlp, CURLUPART_PATH, "/index.html", 0);
rc = curl_url_set(urlp, CURLUPART_QUERY, "name=john", 0);
rc = curl_url_set(urlp, CURLUPART_FRAGMENT, "anchor", 0);
rc = curl_url_set(urlp, CURLUPART_ZONEID, "25", 0);
The API always expects a null-terminated char * string in the third
argument, or NULL to clear the field. Note that the port number is also
provided as a string this way.
Set parts are not URL encoded unless the user asks for it with the
CURLU_URLENCODE flag in the forth argument.
By setting an individual part, you can for example first set a full URL, then update a single component of that URL and then extract the updated version of that URL.
For example, let's say we have this URL
const char *url="http://joe:7Hbz@example.com:8080/images?id=5445#footer";
and we want change the host in that URL to instead become example.net, it
could be done like this:
CURLU *h = curl_url();
rc = curl_url_set(h, CURLUPART_URL, url, 0);
Then change the hostname part:
rc = curl_url_set(h, CURLUPART_HOST, "example.net", 0);
and this then now holds this URL:
http://joe:7Hbz@example.net:8080/images?id=5445#footer
If you then continue and change the path part to /foo like this:
rc = curl_url_set(h, CURLUPART_PATH, "/foo", 0);
and the URL handle now holds this URL:
http://joe:7Hbz@example.net:8080/foo?id=5445#footer
etc...