如何從emacs中的url解析xml？

Question

我正在使用url-retrieve-synchronously函數，它返回一個包含響應的緩衝區。我想知道是否有一個非hacky的方式來獲得響應的主體，並能夠將它傳遞給xml-parse-region。

是否存在一個xml-parse-from-url函數？我如何解析url-retrieve的響應？

Answer 1

在identica-mode.el（在GNU GPL 2版本授權），還有將要使用的URL，檢索並把它傳遞給XML解析器的功能，並返回解析響應：

(defun identica-get-response-body (&optional buffer) 
    "Extract HTTP response body from HTTP response, parse it as XML, and return a XML tree as list. 
`buffer' may be a buffer or the name of an existing buffer. 
If `buffer' is omitted, current-buffer is parsed. 

Removed the call to `identica-clean-response-body'." 
    (or buffer 
     (setq buffer (current-buffer))) 
    (set-buffer buffer) 
    (set-buffer-multibyte t) 
    (let ((start (save-excursion 
     (goto-char (point-min)) 
     (and (re-search-forward "<\?xml" (point-max) t) 
       (match-beginning 0))))) 
    ;;(identica-clean-response-body) ; necessary for identica, cleaned up some weird characters 
    (and start 
     (xml-parse-region start (point-max))))) 

Answer 2

您可以看看Emacs發佈的一些軟件包如何實現它。例如，lisp/net/newst-backend.el和lisp/net/soap-client.el。