(require 'url-methods)
(require 'url-util)
(require 'url-parse)
(defun url-expander-remove-relative-links (name)
(let ((new (if (not (string-match "^/" name))
(concat "/" name)
name)))
(if (string-match "/\\.+$" new)
(setq new (concat new "/")))
(while (string-match "/\\(\\./\\)" new)
(setq new (concat (substring new 0 (match-beginning 1))
(substring new (match-end 1)))))
(while (string-match "/\\([^/]*/\\.\\./\\)" new)
(setq new (concat (substring new 0 (match-beginning 1))
(substring new (match-end 1)))))
(while (string-match "^/\\.\\.\\(/\\)" new)
(setq new (substring new (match-beginning 1) nil)))
new))
(defun url-expand-file-name (url &optional default)
"Convert URL to a fully specified URL, and canonicalize it.
Second arg DEFAULT is a URL to start with if URL is relative.
If DEFAULT is nil or missing, the current buffer's URL is used.
Path components that are `.' are removed, and
path components followed by `..' are removed, along with the `..' itself."
(if (and url (not (string-match "^#" url)))
(setq url (mapconcat (function (lambda (x)
(if (memq x '(? ?\n ?\r))
""
(char-to-string x))))
url "")))
(setq default (cond
((vectorp default)
default)
(default
(url-generic-parse-url default))
(url-current-object
url-current-object)
((string-match url-nonrelative-link url)
nil)
(t
(error "url-expand-file-name confused - no default?"))))
(cond
((= (length url) 0) (url-recreate-url default))
((string-match "^#" url) url)
((string-match url-nonrelative-link url) url)
(t
(let* ((urlobj (url-generic-parse-url url))
(inhibit-file-name-handlers t)
(expander (url-scheme-get-property (url-type default) 'expand-file-name)))
(if (string-match "^//" url)
(setq urlobj (url-generic-parse-url (concat (url-type default) ":"
url))))
(funcall expander urlobj default)
(url-recreate-url urlobj)))))
(defun url-identity-expander (urlobj defobj)
(url-set-type urlobj (or (url-type urlobj) (url-type defobj))))
(defun url-default-expander (urlobj defobj)
(if (url-type urlobj)
nil
(url-set-type urlobj (or (url-type urlobj) (url-type defobj)))
(url-set-port urlobj (or (url-port urlobj)
(and (string= (url-type urlobj)
(url-type defobj))
(url-port defobj))))
(if (not (string= "file" (url-type urlobj)))
(url-set-host urlobj (or (url-host urlobj) (url-host defobj))))
(if (string= "ftp" (url-type urlobj))
(url-set-user urlobj (or (url-user urlobj) (url-user defobj))))
(if (string= (url-filename urlobj) "")
(url-set-filename urlobj "/"))
(if (string-match "^/" (url-filename urlobj))
nil
(let ((query nil)
(file nil)
(sepchar nil))
(if (string-match "[?#]" (url-filename urlobj))
(setq query (substring (url-filename urlobj) (match-end 0))
file (substring (url-filename urlobj) 0 (match-beginning 0))
sepchar (substring (url-filename urlobj) (match-beginning 0) (match-end 0)))
(setq file (url-filename urlobj)))
(setq file (url-expander-remove-relative-links
(concat (url-basepath (url-filename defobj)) file)))
(url-set-filename urlobj (if query (concat file sepchar query) file))))))
(provide 'url-expand)