Add in some useful convenience functions for handling HTTP.

lisp/url/ChangeLog

@@ -1,3 +1,9 @@
+2010-06-22  Mark A. Hershberger  <mah@everybody.org>
+
+	* url-parse.el (url-user-for-url, url-password-for-url):
+	Convenience functions that get usernames and passwords for urls
+	from auth-source functions.
+
 2010-06-12  Štěpán Němec  <stepnem@gmail.com>  (tiny change)
 
 	* url-vars.el (url-privacy-level): Fix doc typo.  (Bug#6406)

lisp/url/url-parse.el

@@ -25,6 +25,7 @@
 ;;; Code:
 
 (require 'url-vars)
+(require 'auth-source)
 (eval-when-compile (require 'cl))
 
 (autoload 'url-scheme-get-property "url-methods")
@@ -174,6 +175,25 @@ TYPE USER PASSWORD HOST PORTSPEC FILENAME TARGET ATTRIBUTES FULLNESS."
           (url-parse-make-urlobj
            prot user pass host port file refs attr full)))))))
 
+(defmacro url-bit-for-url (method lookfor url)
+  `(let* ((urlobj (url-generic-parse-url url))
+          (bit (funcall ,method urlobj))
+          (methods (list 'url-recreate-url
+                         'url-host)))
+     (while (and (not bit) (> (length methods) 0))
+       (setq bit
+             (auth-source-user-or-password
+              ,lookfor (funcall (pop methods) urlobj) (url-type urlobj))))
+     bit))
+
+(defun url-user-for-url (url)
+  "Attempt to use .authinfo to find a user for this URL."
+  (url-bit-for-url 'url-user "login" url))
+
+(defun url-password-for-url (url)
+  "Attempt to use .authinfo to find a password for this URL."
+  (url-bit-for-url 'url-password "password" url))
+
 (provide 'url-parse)
 
 ;; arch-tag: f338325f-71ab-4bee-93cc-78fb9a03d403