March 2011 - dancer-users - lists.preshweb.co.uk

Need Web Development?
by Al Newkirk & Associates 01 Mar '11

01 Mar '11

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alternate routes based on where the query is coming from
by Puneet Kishor 01 Mar '11

01 Mar '11

now that I have the following working (thanks Matt Vickers) % curl 'http://dm.local/dm.json?var=prcp&from=1980-1-1&to=1980-2-2' I get back {"prcp": [0, 1, 2, 1, 0 ... lots of elements .. ]} Except, these values need to be post-processed before display/use. Because I get back so many values, I do the transfer as above, and then post process them in the user's browser using JavaScript. $.ajax({ url : "/dm.json?var=" + v + "&from=" + from + "&to=" + to, type : "GET", data : "", dataType: "json", error : function() { alert("Error loading html document"); }, success : function(d) { var dt = d[v]; var data = []; for (var i = 0; i < dt.length; i++) { data.push( post_process(dt[i] ); } .. display( data ); } }); Of course, I don't have recourse to JavaScript with curl, so I need to "post process" the data *before* it gets to the user, that is, I need to do it on the server side. Of course, I could do this with two different routes, one for via the browser, and the other via curl. But, surely, Dancer has some way more elegant pas de deux that can do this, no? Come to think of it, pas de deux would be a nice name for a Dancer plugin. -- Puneet Kishor http://punkish.org Carbon Model http://carbonmodel.org Charter Member, Open Source Geospatial Foundation http://osgeo.org Science Fellow http://creativecommons.org Nelson Institute, UW-Madison http://nelson.wisc.edu ------------------------------------------------------------------ Assertions are politics; Backing up assertions with evidence is science ==================================================================

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Cookies handling is broken
by Alexis Sukrieh 01 Mar '11

01 Mar '11

Hi again, A co-worker of mine started using Dancer to built an URL-shortener with unique-click stats. http://susbck.com/ To do so he uses multiple cookies to flag each visitors, and he came to realize that Dancer's cookie handling is ... well, completely broken :/ The most important thing we do wrong is to use one single Set-Cookie header (this is a recent change). Indeed, even if the HTTP specs tells us to do so, most browsers fail at parsing one Set-Cookie header with multiple values. Apparently it's way better to use multiple Set-Cookie headers (like Dancer used to do). Moreover, in the current version, Dancer splits the Set-Cookie header in a rather stupid way (split /[,;]/) which leads to have a mess of values when cookies are set with options (like "expires", or "path"). I'm saying that to the list just to warn you that we should change the way Dancer handles cookies. Actually, I think we should rewrite it completely, maybe by looking at how CGI::Cookie works. There already two issue reports written by my co-worker that explains what he came accross: https://github.com/sukria/Dancer/issues#issue/356 https://github.com/sukria/Dancer/issues#issue/357 Any help is welcome ;) I think this is our top-priority for the next release. Regards, -- Alexis Sukrieh

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