<div class="gmail_quote">On Wed, Sep 30, 2009 at 9:57 PM, Eli Barzilay <<a href="mailto:eli@barzilay.org" target="_blank">eli@barzilay.org</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> On Sep 30, Synx wrote: > (url->string (string->url "?")) => "" > > I can't seem to make a url structure where url->string produces the > valid URL "?" (meaning the same spot, with no query arguments). "" > by itself means the same spot with the same query arguments. > > I would recommend adding something in the url structure contract > that allows the query portion of make-url be either (listof (cons/c > symbol? (or/c false/c string?))) or 'clear to produce a ? without > any name/value pairs. Allowing #f (which is a different contract) seems like the right thing (given that the fragment part is done this way), but I'm not sure if there's code that relies on it. Is there anyone who uses this and relies on the query part to always be a list of bindings? </blockquote><div> This change will mean mapping the query would take one extra test - or we will have to have a separate function to help filter it out. (define (url-query* url) (if (not (url-query url)) '() (url-query url))) Which probably should be supplied within net/url so people who depends on the binding do not have to write their own. </div> Cheers, yc </div>