用Emacs Lisp下载文件
用Emacs Lisp下载文件
提问于 2010-12-15 16:33:16
elisp有没有一个功能，可以获取一个url和一个目的地，并从互联网上下载该url？
我发现了url-retrieve和url-retrieve-synchronously，但url-retrieve接受回调，url-retrieve-synchronously将所有内容放入缓冲区。有没有更简单的方法？
回答 3
Stack Overflow用户
发布于 2010-12-16 01:02:23
显然，url-copy-file是最好的选择，但对于更有冒险精神的Emacs黑客，我建议这样做：
(require 'url)
(defun download-file (&optional url download-dir download-name)
(interactive)
(let ((url (or url
(read-string "Enter download URL: "))))
(let ((download-buffer (url-retrieve-synchronously url)))
(save-excursion
(set-buffer download-buffer)
;; we may have to trim the http response
(goto-char (point-min))
(re-search-forward "^$" nil 'move)
(forward-char)
(delete-region (point-min) (point))
(write-file (concat (or download-dir
"~/downloads/")
(or download-name
(car (last (split-string url "/" t))))))))))Stack Overflow用户
发布于 2010-12-15 17:06:05
(w3m-download "http://www.gnu.org/index.html")Stack Overflow用户
发布于 2014-04-24 01:22:57
http://steloflute.tistory.com/entry/Emacs-Lisp-urlretrieve
; synchronously
(defun get-url (url)
(with-current-buffer (url-retrieve-synchronously url) (buffer-string)))
(print (get-url "http://www.gnu.org"))
; asynchronously
(defun print-url (url)
(url-retrieve url (lambda (a) (print a))))
(print-url "http://www.gnu.org")检索URL| http://www.gnu.org/software/emacs/manual/html_node/url/Retrieving-URLs.html
当前缓冲区| http://www.gnu.org/software/emacs/manual/html_node/elisp/Current-Buffer.html
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原文链接：
https://stackoverflow.com/questions/4448055
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