code.delx.au - gnu-emacs/blob - lisp/url/url-proxy.el

   1 ;;; url-proxy.el --- Proxy server support
   2 ;; Keywords: comm, data, processes, hypermedia
   3
   4 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   5 ;;; Copyright (c) 1999 Free Software Foundation, Inc.
   6 ;;;
   7 ;;; This file is part of GNU Emacs.
   8 ;;;
   9 ;;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;;; it under the terms of the GNU General Public License as published by
  11 ;;; the Free Software Foundation; either version 2, or (at your option)
  12 ;;; any later version.
  13 ;;;
  14 ;;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;;; GNU General Public License for more details.
  18 ;;;
  19 ;;; You should have received a copy of the GNU General Public License
  20 ;;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;;; Boston, MA 02111-1307, USA.
  23 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  24
  25 (require 'url-parse)
  26 (autoload 'url-warn "url")
  27
  28 (defun url-default-find-proxy-for-url (urlobj host)
  29   (cond
  30    ((or (and (assoc "no_proxy" url-proxy-services)
  31              (string-match
  32               (cdr
  33                (assoc "no_proxy" url-proxy-services))
  34               host))
  35         (equal "www" (url-type urlobj)))
  36     "DIRECT")
  37    ((cdr (assoc (url-type urlobj) url-proxy-services))
  38     (concat "PROXY " (cdr (assoc (url-type urlobj) url-proxy-services))))
  39    ;;
  40    ;; Should check for socks
  41    ;;
  42    (t
  43     "DIRECT")))
  44
  45 (defvar url-proxy-locator 'url-default-find-proxy-for-url)
  46
  47 (defun url-find-proxy-for-url (url host)
  48   (let ((proxies (split-string (funcall url-proxy-locator url host) " *; *"))
  49         (proxy nil)
  50         (case-fold-search t))
  51     ;; Not sure how I should handle gracefully degrading from one proxy to
  52     ;; another, so for now just deal with the first one
  53     ;; (while proxies
  54     (if (listp proxies)
  55         (setq proxy (car proxies))
  56       (setq proxy proxies))
  57     (cond
  58      ((string-match "^direct" proxy) nil)
  59      ((string-match "^proxy +" proxy)
  60       (concat "http://" (substring proxy (match-end 0)) "/"))
  61      ((string-match "^socks +" proxy)
  62       (concat "socks://" (substring proxy (match-end 0))))
  63      (t
  64       (url-warn 'url (format "Unknown proxy directive: %s" proxy) 'critical)
  65       nil))))
  66
  67 (defun url-proxy (url callback &optional cbargs)
  68   ;; Retrieve URL from a proxy.
  69   ;; Expects `url-using-proxy' to be bound to the specific proxy to use."
  70   (setq url-using-proxy (url-generic-parse-url url-using-proxy))
  71   (let ((proxy-object (copy-sequence url)))
  72     (url-set-target proxy-object nil)
  73     (url-http url-using-proxy callback cbargs)))
  74
  75 (provide 'url-proxy)
  76
  77 ;;; arch-tag: 4ff8882e-e498-42b7-abc5-acb449cdbc62