On Tue, Jan 28, 2014 at 3:45 PM, Matthew Butterick <m...@mbtype.com> wrote: > The behavior is correct. It's just not the behavior you want. > > When you start up the web server, the default URL for the page is: > > http://localhost:8000/servlets/standalone.rkt > > So "/puppy.jpg" really means this: > > http://localhost:8000/puppy.jpg > > Which works, because puppy.jpg is in server-root-path. Whereas the relative > URL "puppy.jpg" means this: > > http://localhost:8000/servlets/puppy.jpg > > And indeed, you get no puppy, because the server is looking in the > subdirectory "servlets", which doesn't exist in your server-root-path. > > Thus you have two choices: > > 1) Add the #:servlet-path parameter, which lets you attach the servlet to a > URL at the top level, like so: > > (serve/servlet > start > #:server-root-path SOMEPATH > #:servlet-path "/standalone.rkt" > ) > > Now when you start the web server, the URL for the page will be: > > http://localhost:8000/standalone.rkt > > And when you link to "puppy.jpg" (no forward slash), it will mean: > > http://localhost:8000/puppy.jpg > > And you will get a puppy. (Of course, "/puppy.jpg" will still work.) > > 2) Keep your existing server configuration and instead put a "servlets" > subdirectory within D:/Tobias/server-root/htdocs/, and puppy.jpg within it. > Then you can use "puppy.jpg" as a relative URL. > > The docs for serve/servlet cover servlet-path [1], though your question is > fair because this consequence is a little unexpected. I don't know the > policy reason for having the default servlet-path be > "/servlets/standalone.rkt" rather than something at the top level, like > "/standalone.rkt".
There's no deep reason. It's just for backwards compatibility. Jay > [1] http://docs.racket-lang.org/web-server/run.html?q=serve/servlet > > > > On Tue, Jan 28, 2014 at 1:38 PM, Janos Tobias Locsei <jtloc...@cantab.net> > wrote: >> >> 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 <m...@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 >>> <jtloc...@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 >>>> >>> >> > > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users > -- Jay McCarthy <j...@cs.byu.edu> Assistant Professor / Brigham Young University http://faculty.cs.byu.edu/~jay "The glory of God is Intelligence" - D&C 93 ____________________ Racket Users list: http://lists.racket-lang.org/users
