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   <TITLE> [99s-extend] Cowboy CORS
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   <H1>[99s-extend] Cowboy CORS</H1>
    <B>Lee Sylvester</B> 
    <A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Cowboy%20CORS&In-Reply-To=%3C0103B45C-A73C-498E-908D-AA1639D3DEE1%40gmail.com%3E"
       TITLE="[99s-extend] Cowboy CORS">lee.sylvester at gmail.com
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    <I>Fri Apr 19 16:47:09 CEST 2013</I>
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<PRE>Hi guys,

So, I thought I had this resolved, as I managed to get it working locally, but across different local domains (test.localhost.com and cowboy.localhost.com).  However, now I've deployed my app to a VM, I simply can't get CORS working in Cowboy.  Here's the OPTIONS response from Chrome's console:


Request URL:<A HREF="http://www.example.com/">http://www.example.com/</A>
Request Method:OPTIONS
Status Code:200 OK
Request Headersview source
Accept:*/*
Accept-Charset:ISO-8859-1,utf-8;q=0.7,*;q=0.3
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Access-Control-Request-Headers:origin, method, content-type
Access-Control-Request-Method:POST
Connection:keep-alive
Host:www.example.com
Origin:<A HREF="http://test.localhost.com:8889">http://test.localhost.com:8889</A>
Referer:<A HREF="http://test.localhost.com:8889/">http://test.localhost.com:8889/</A>
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.65 Safari/537.31
Response Headersview source
Access-Control-Allow-Headers:Content-Type, X-Requested-With, Origin, Method
Access-Control-Allow-Methods:GET, POST, OPTIONS
Access-Control-Allow-Origin:*
connection:keep-alive
content-length:0
date:Fri, 19 Apr 2013 14:40:00 GMT
server:Cowboy

And then this is the POST response:

Request URL:<A HREF="http://www.example.com/">http://www.example.com/</A>
Request Headersview parsed
POST <A HREF="http://www.example.com/">http://www.example.com/</A> HTTP/1.1
Origin: <A HREF="http://test.localhost.com:8889">http://test.localhost.com:8889</A>
Referer: <A HREF="http://test.localhost.com:8889/">http://test.localhost.com:8889/</A>
method: POST <A HREF="http://www.example.com/">http://www.example.com/</A> HTTP/1.1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.65 Safari/537.31
content-type: application/x-www-form-urlencoded
Form Dataview parsed
data={&quot;Type&quot;:&quot;auth_request&quot;,&quot;Authentication&quot;:&quot;public&quot;,&quot;Authorization&quot;:null,&quot;Domain&quot;:&quot;www.example.com&quot;,&quot;Application&quot;:&quot;test_app&quot;,&quot;Ident&quot;:&quot;lee&quot;}

I am setting {&lt;&lt;&quot;Access-Control-Allow-Origin&quot;&gt;&gt;, &lt;&lt;&quot;*&quot;&gt;&gt;} in the headers param of cowboy_req:reply and the cowboy_req:set_resp_header, but neither seems to be working.  Can anyone spot what I might be doing wrong?

The cowboy_req:set_resp_header is happening in the handle&#8230; So

handle(Req, State) -&gt;
	Reply = case cowboy_req:method(Req) of
		{&lt;&lt;&quot;POST&quot;&gt;&gt;, Req2} -&gt;
			Req3 = cowboy_req:set_resp_header(&lt;&lt;&quot;Access-Control-Allow-Origin&quot;&gt;&gt;, &lt;&lt;&quot;*&quot;&gt;&gt;, Req2),
[snip]


Thanks,
Lee

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