[racket] web server: leading forward slash required in paths?

Hi Matthew,

Here's an example without using templates, but the same sort of behavior
applies when using templates too.

#lang racket

(require web-server/servlet
         web-server/servlet-env)

(define SOMEPATH
  (build-path "D:\\Tobias\\server-root"))

(define (start request)
  (response/xexpr
   `(html (head (title "Hello world"))
          (body (h1 "Hello world")
                (img ([src "/puppy.jpg"] [alt "cute puppy"]))))))
; puppy.jpg is located at D:/Tobias/server-root/htdocs/puppy.jpg
; Image only displays if I use the leading forward slash like this

(serve/servlet
 start
 #:server-root-path SOMEPATH
 )

I noticed that the leading forward slash is used in the web applications
tutorial of the racket documentation, e.g. when referencing a css file
(search page for "test-static.css"):
http://docs.racket-lang.org/continue/

Tobias




On 28 January 2014 19:27, Matthew Butterick <mb at mbtype.com> wrote:

> I've not experienced this issue with the Racket web server. When you
> append a leading forward slash to a URL, you're obviously telling the
> browser something completely different about where to find the file. I
> would suspect it has something to do with either file organization, Racket
> web server configuration, or both.
>
> Where are myimage.jpg and mytemplate.html in relation to one another? In
> the same directory?
>
>
> On Tue, Jan 28, 2014 at 7:04 AM, Janos Tobias Locsei <jtlocsei at cantab.net>wrote:
>
>> I noticed that when using the racket web server one needs to include a
>> leading forward slash when referencing static files e.g. a style.css or an
>> image.jpg. Is there a rationale for this? It's different than the usual
>> html convention, and it means that when using html template files it's not
>> possible to preview the template in the web browser without running the web
>> server.
>>
>> For example, I have a file mytemplate.html that includes the line
>>
>> <img src="/myimage.jpg" />
>>
>> The leading "/" is required for the image to be found by the racket web
>> server but it means that I can't preview mytemplate.html in my web browser
>> without first firing up the racket web server.
>>
>> It's not a big deal but I'm just wondering if there's a way around this.
>>
>> Tobias
>>
>>
>>
>>
>>
>> ____________________
>>   Racket Users list:
>>   http://lists.racket-lang.org/users
>>
>>
>
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