Re: Howto: Retrieve only URL metadata

[T.V Raman]

Nice, this is even nicer!



Adam Porter writes:
 > > Is there a light-weight means of just retrieving URL metadata given a
 > > URL using the url package in Emacs?
 > > 
 > > Note: I know how to do that using Curl and parsing the output from a
 > > HEAD method call; am looking for a pure elisp solution
 > 
 > FYI, if you'll forgive the transgression, since plz.el is in ELPA and 
 > "part of Emacs", here's a simple way to do it:
 > 
 >    (plz-response-headers
 >     (plz 'head 
 > "https://lists.gnu.org/archive/html/emacs-devel/2024-03/msg00670.html";
 >       :as 'response))
 > 
 >    ;; ((date . "Wed, 27 Mar 2024 04:11:27 GMT")
 >    ;;  (server . "Apache/2.4.29 (Trisquel_GNU/Linux)")
 >    ;;  (strict-transport-security . "max-age=63072000; 
 > includeSubDomains; preload")
 >    ;;  (x-frame-options . "sameorigin")
 >    ;;  (x-content-type-options . "nosniff")
 >    ;;  (last-modified . "Wed, 27 Mar 2024 03:44:54 GMT")
 >    ;;  (etag . "\"1472-6149c3ac97980-gzip\"")
 >    ;;  (accept-ranges . "bytes")
 >    ;;  (vary . "Accept-Encoding")
 >    ;;  (content-encoding . "gzip")
 >    ;;  (content-length . "2022")
 >    ;;  (content-type . "text/html"))
 > 
 > A future version will probably simplify that, returning the alist of 
 > headers directly for calling:
 > 
 >    (plz 'head URL)

--