[plt-scheme] Module servlets and non-sexpr responses

Sun Nov 19 13:24:33 EST 2006

I'm not sure what's wrong with your code, but in my program, I use unit servlets, and 
the following codes work fine:

(make-response/full 200 "OK" (current-seconds) #"text/plain" () (list s)))

(make-response/full 200 "OK"
                                                       (current-seconds)
                                                       #"image/gif"
                                                       ()
                                                       (list (string->bytes/latin-1 s)))

where s is a string (the content of a file). Hope this can help you.

Chongkai

----- Original Message ----- 
From: "Jens Axel Søgaard" <jensaxel at soegaard.net>
To: "PLT-list" <plt-scheme at list.cs.brown.edu>
Sent: Sunday, November 19, 2006 10:22 AM
Subject: [plt-scheme] Module servlets and non-sexpr responses

> According to
> 
> <http://pre.plt-scheme.org/docs/html/web-server/web-server-Z-H-12.html#node_sec_10.1.3>
> 
> a legal response from a servlets is
> 
>   (listof (union string bytes))
>       The first string is the MIME type (often "text/html", but see RFC
>    2822 for other options). The rest of the strings provide the
>    document's content.
> 
> but nevertheless, I can't get this simple example to run:
> 
> (module static mzscheme
>   (require (lib "servlet.ss" "web-server"))
>   (provide interface-version timeout start)
>   (define interface-version 'v1)
>   (define timeout +inf.0)
>   (define (start initial-request)
>      (report-errors-to-browser send/finish)
>       (list
>        "text/html"
>        "<html><head></head><body>Foo</body><html>")))
> 
> I get the following error in the browser:
> 
> <html>
>   <head><title>Erroneous Xexpr</title></head>
>   <body><h1>Erroneous Xexpr</h1>
>   <p>An Xexpr in the servlet is malformed. The exact error
> is</p>
> 
> <pre>Expected a symbol as the element name, given
> text/html</pre>
> 
> <h2>The Full Xexpr Is</h2>
> 
> <pre><font color="red">
>   ("text/html" "<html><head></head><body>Foo</body></html>")
> </font></pre>
> 
> Am I misinterpreting the documentation?
> 
> -- 
> Jens Axel Søgaard
> 
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