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Re: more url-utils?

From: joakim
Subject: Re: more url-utils?
Date: Mon, 16 May 2011 19:04:25 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

Tom Tromey <address@hidden> writes:

>>>>>> "Stefan" == Stefan Monnier <address@hidden> writes:
> Stefan> While Emacs uses them a lot, dynamically-scoped variables used as
> Stefan> implicit extra parameters are bad.  In many cases, it's difficult to
> Stefan> avoid using them, but in this case, calling a function after the
> Stefan> url-retrieve call works just as well, so there's no excuse.
> IIRC, in package.el I had to special-case some URL types, because
> headers are inconsistently used.  E.g., I think the 'ftp' method won't
> leave headers in the buffer.  It would be nice if this bit were handled
> by the url package rather than all the callers.

  (url-retrieve-synchronously URL)
  (url-retrieve-synchronously URL &optional remove-headers)

ought to sattisfy all participants in this thread?

and it could be done somewhat like this:

(defun url-retrieve-synchronously (url &optional remove-headers)
  (let ((buffer (url-retrieve-synchronously-old-implementation url))
    (if remove-headers 
    (url-remove-headers buffer

(defun url-remove-headers (buffer)
      (with-current-buffer buffer
        (goto-char (point-min))
        (search-forward "\n\n")
        (delete-region (point-min) (point))
but we would also need to look out for the special cases Tom mentioned.
Good enough? 

url-remove-headers is separate so it can be re-used in a url-retrieve
callback for instance.

> Tom

Joakim Verona

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