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diff --git a/_build/static/archives/extend/2012-November/000016.html b/_build/static/archives/extend/2012-November/000016.html new file mode 100644 index 00000000..d87a2074 --- /dev/null +++ b/_build/static/archives/extend/2012-November/000016.html @@ -0,0 +1,129 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<HTML> + <HEAD> + <TITLE> [99s-extend] Proposal for Cowboy Routing + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Proposal%20for%20Cowboy%20Routing&In-Reply-To=%3C20121113161004.GF17626%40members.linode.com%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <style type="text/css"> + pre { + white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ + } + </style> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="000013.html"> + <LINK REL="Next" HREF="000014.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[99s-extend] Proposal for Cowboy Routing</H1> + <B>Thomas Allen</B> + <A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Proposal%20for%20Cowboy%20Routing&In-Reply-To=%3C20121113161004.GF17626%40members.linode.com%3E" + TITLE="[99s-extend] Proposal for Cowboy Routing">thomas at oinksoft.com + </A><BR> + <I>Tue Nov 13 17:10:04 CET 2012</I> + <P><UL> + <LI>Previous message: <A HREF="000013.html">[99s-extend] Proposal for Cowboy Routing +</A></li> + <LI>Next message: <A HREF="000014.html">[99s-extend] Proposal for Cowboy Routing +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#16">[ date ]</a> + <a href="thread.html#16">[ thread ]</a> + <a href="subject.html#16">[ subject ]</a> + <a href="author.html#16">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>On Tue, Nov 13, 2012 at 04:22:48PM +0100, Loïc Hoguin wrote: +><i> No, just check that cowboy_req:path/1 ends with $/, and if it +</I>><i> doesn't then redirect. +</I> +OK, so what I'm going for is to actually check for a valid URL with the +slash. I got it to work in current cowboy, but shield your eyes ... + +I do this "middleware" thing often ... this might be a misnomer as I +think some definitions of middleware specify that it be able to wrap the +request *and* the response. I digress ... + + %%% foo_app.erl: + + {ok, _} = cowboy:start_http(http, ?ACCEPTORS, + [{port, ?PORT}], + [{dispatch, Dispatch}, + {onrequest, fun(Req) -> + foo_middleware:all(Dispatch, Req) + end}] + ), + + + %% foo_middleware.erl: + + -define(MIDDLEWARE, [ + fun foo_middleware:slash/2, + fun foo_middleware:session/2, + fun foo_middleware:user/2 + ]). + + all(Dispatch, Req) -> + lists:foldl(fun(F, CurReq) -> F(Dispatch, CurReq) end, Req, + ?MIDDLEWARE). + + %% ... + + slash(Dispatch, Req) -> + {Path, _} = cowboy_req:path(Req), + case binary:last(Path) of + $/ -> Req; + _ -> + SlashPath = <<Path/bitstring, "/">>, + {Host, _} = cowboy_req:host(Req), + Match = cowboy_dispatcher:match(Dispatch, Host, + SlashPath), + case element(1, Match) of + ok -> + cowboy_req:reply(301, + [{<<"Location">>, SlashPath}], <<>>, Req); + error -> Req + end + end. + +So, I assume that any path not ending in "/" won't match. Another +version of this could toss that assumption, but then you're performing +an extra match on every request ... much better to use a '_' rule in +that case. + +One thing that is icky about using a fallback '_' handler, and the +reason I've elected to use onrequest for this example, is that I do not +see a way to access cowboy_protocol's state.dispatch to access these +rules. So, I enclose them in my `onrequest` fun. Would it be possible to +expose Dispatch? This has many applications, particularly for URL +reversing. + +Perhaps I am missing several things ;^) + +Thomas + +</PRE> + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="000013.html">[99s-extend] Proposal for Cowboy Routing +</A></li> + <LI>Next message: <A HREF="000014.html">[99s-extend] Proposal for Cowboy Routing +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#16">[ date ]</a> + <a href="thread.html#16">[ thread ]</a> + <a href="subject.html#16">[ subject ]</a> + <a href="author.html#16">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://lists.ninenines.eu/listinfo/extend">More information about the Extend +mailing list</a><br> +</body></html> |