Re: image from URL?

> On 2014-09-15, Alan G Isaac wrote:
>> The URL
>> ``http://research.stlouisfed.org/fred2/graph/fredgraph.png?g=KlW``
>> serves an image in PNG format, but I cannot simple provide it to the
>> ``image`` directive. Is there a good way to proceed within docutils?


Guenter Milde <[email protected]> wrote:
> The image directive expects an URL as argument.
> What is the problem?
> What do you want to achieve, what is your output format?
> What is the result you get?


Hi Günter,

Thank you for your patient reply to my appallingly
incomplete inquiry.  (Excuse: I was hurriedly revising
some slides using rst2beamer.)

Here's the issue: if I provide that URL, then the LaTeX
generated is an \includegraphics command referring to:

     P:/research.stlouisfed.org/fred2/graph/fredgraph.png?g=KlW

(The ``P:/`` presumably derives from the ``http://``.) So
this has two problems:

1. it refers to the wrong location, and
2. LaTeX cannot handle URLs for graphics inclusion

In principle the second problem could be addressed by using
the \externalfigure command with ConTeXt, but I am not
a ConTeXt user, and in any case that would still leave the
first problem.

So I think (?) this report has become both a bug report
(problem 1) and a possible enhancement request (problem 2).
I am not sure about the enhancement request, because it is
not clear to me whose responsibility this should be:
docutils, or LaTeX.  Given the current limitations of
LaTeX, I am inclined to think that the right solution is
for the LaTeX writer to write a hyperlink.  However one
could imagine allowing docutils users to specify an
imagecache directory for storing images referred to by URL.

fwiw,
Alan





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