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[ELPA] New package: shorten-url

From: Bad Blue Bull
Subject: [ELPA] New package: shorten-url
Date: Tue, 26 Feb 2019 00:15:13 +0300

shorten-url allows you to insert a shortened alternative for a given URL.  Can be useful for chatting.
;;; shorten-url.el --- URL shortener         -*- lexical-binding: t; -*-

;; Copyright (C) 2019 Bad Blue Bull

;; Author: Bad Blue Bull <address@hidden>
;; Keywords: irc, icq

;; Version: 1.0

;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or (at
;; your option) any later version.

;; This program is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see
;; <https://www.gnu.org/licenses/>.

;;; Commentary:

;; shorten-url allows you to insert a shortened alternative for a given
;; URL.  Can be useful for chatting.
;; A request for a URL produced by concatenation of shorten-url-base
;; with a URL passed as an argument is fulfilled and data from HTTP
;; response gets inserted into current buffer.
;; At the moment of this release TIMEOUT optional variable of
;; url-retrieve-synchronously may break execution of this function
;; (bug  #34607), so it's unused.
;; Also url-retrieve-synchronously takes long time to retrieve a URL
;; that hasn't been retrieved before in some interval of time in same
;; Emacs session (bug #34652).

;; Configuration:

;; You can customize shorten-url-base to use diffirent URL shortener web
;; service.

;; Usage:

;; Call shorten-url from Lisp or execute it as command with URL you want
;; to shorten passed as an argument.
;; Example:
;; M-x shorten-url https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34607
;; result inserted: https://qps.ru/MjrtW
;; For convenient usage bind a key sequence so that it will insert
;; shortened version of URL stored in kill ring.
;; Here is example how you can bind C-c C-y key sequence so that when it
;; is used in ERC it inserts a shortened URL corresponding to element of
;; kill ring that the yank command would insert:
;; (add-hook 'erc-mode-hook (lambda ()
;;                (local-set-key (kbd "C-c C-y")
;;                       (lambda (&optional arg)
;;                         (interactive "*P")
;;                         (shorten-url (current-kill
;;                               (cond
;;                                ((listp arg)
;;                                 0)
;;                                ((eq arg '-)
;;                                 -2)
;;                                (t
;;                                 (1- arg)))
;;                               ))))))

;;; Code:

(provide 'shorten-url)

(defcustom shorten-url-base "https://qps.ru/api?url=""base for URL shortener.
short-url will concatenate it with URL passed as argument"
  :type '(choice (const :tag "https://qps.ru/api?url=""https://qps.ru/api?url=""https://clck.ru/--?url=""https://clck.ru/--?url=""custom" "")))

(defun shorten-url (url)
  "Insert shortened URL (passed as argument).
Contact a URL produced by concatenation shorten-url-base and the
argument and insert data from response from the server into current
       (interactive "sURL to shorten: ")
       (insert (with-current-buffer
            (concat shorten-url-base url) nil 't)
         (goto-char (point-min))
         (search-forward "\n\n" nil 't)
             (buffer-substring (point) (point-max))
           (kill-buffer (current-buffer)))))
       (message "inserted shortened URL for %s" url))

;;; shorten-url.el ends here


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