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url-retrieve - how to access status
From: |
Martin |
Subject: |
url-retrieve - how to access status |
Date: |
Mon, 17 Mar 2014 07:56:49 +0100 |
User-agent: |
mu4e 0.9.9.5; emacs 24.3.1 |
Hi there.
This time I come with a minimal example.
The info page says:
| STATUS is a plist representing what happened during the request,
| with most recent events first, or an empty list if no events have
| occurred. Each pair is one of:
|
| (:redirect REDIRECTED-TO) - the request was redirected to this URL
| (:error (ERROR-SYMBOL . DATA)) - an error occurred. The error can be
| signaled with (signal ERROR-SYMBOL DATA).
But I'm not able to handle that, about 2 hours didn't help me to find
the solution:
Doing:
(require 'url)
(defun my-callback (status)
"docstring"
;; what has to be here if I want to know why my buffer is empty.
;; specialy I want to handle the status for its :error - but I don't
;; know why.
(prin1 status)
(switch-to-buffer (current-buffer)))
(url-retrieve "http://0.0.0.0:3000" 'my-callback)
where 0.0.0.0:3000 works if my ruby on rails server is started, but if
not i get on the prin1 line:
(:error (error connection-failed "failed with code 111
" :host "0.0.0.0" :service 3000))
but how can I make a good message to the minibuffer so the user knows
the server is not reachable or something, and second, how do I have to
set up conditional parameters, not to switch to the buffer or something.
That would be easy for you, but I didn't figure it out and want to learn
from you.
Thanks for your help,
Martin
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