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NE_SET_SERVER_AUTH(3)			neon API reference		    NE_SET_SERVER_AUTH(3)

       ne_set_server_auth, ne_set_proxy_auth, ne_forget_auth - register authentication callbacks

       #include <ne_auth.h>

       typedef int (*ne_request_auth) (void *userdata, const char *realm, int attempt,
					char *username, char *password);

       void ne_set_server_auth (ne_session *session, ne_request_auth callback, void *userdata);

       void ne_set_proxy_auth (ne_session *session, ne_request_auth callback, void *userdata);

       void ne_forget_auth (ne_session *session);

       The ne_request_auth function type defines a callback which is invoked  when  a  server  or
       proxy  server  requires	user authentication for a particular request. The realm string is
       supplied by the server.	The attempt is a counter giving the number of times  the  request
       has been retried with different authentication credentials. The first time the callback is
       invoked for a particular request, attempt will be zero.

       To retry the request using new authentication credentials, the callback should return  ze-
       ro,  and  the  username	and  password  buffers	must  contain NUL-terminated strings. The
       NE_ABUFSIZ constant gives the size of these buffers.


	      If you only wish to allow the user one attempt to enter credentials, use the  value
	      of the attempt parameter as the return value of the callback.

       To  abort the request, the callback should return a non-zero value; in which case the con-
       tents of the username and password buffers are ignored.

       The ne_forget_auth function can be used to discard the cached authentication credentials.

       /* Function which prompts for a line of user input: */
       extern char *prompt_for(const char *prompt);

       static int
       my_auth(void *userdata, const char *realm, int attempts,
	       char *username, char *password)
	  strncpy(username, prompt_for("Username: "), NE_ABUFSIZ);
	  strncpy(password, prompt_for("Password: "), NE_ABUFSIZ);
	  return attempts;

       int main(...)
	  ne_session *sess = ne_session_create(...);

	  ne_set_server_auth(sess, my_auth, NULL);

	  /* ... */

       Joe Orton <neon@webdav.org>.

neon 0.23.5				  8 October 2002		    NE_SET_SERVER_AUTH(3)
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