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POAllow CORS REST request to an express/node.js app
 

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    <p>I am new to node.js/express. I saw this post ( <a href="https://stackoverflow.com/questions/11001817/allow-cors-rest-request-to-a-express-node-js-application-on-heroku">Allow CORS REST request to a Express/Node.js application on Heroku</a>), but the proposed solution did not work.</p> <p>I am just making a call to mapquest api to get some data to play around with.</p> <p>Here is part of my server.js:</p> <pre><code>var allowCrossDomain = function(req, res, next) { res.header('Access-Control-Allow-Origin', '*'); res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS'); res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With'); // intercept OPTIONS method if ('OPTIONS' == req.method) { console.log('hit options'); res.send(200); } else { next(); } }; app.configure(function(){ console.log('configuring app'); app.use(allowCrossDomain); app.use(express.bodyParser()); app.use(express.methodOverride()); app.use(app.router); app.use(express.static(__dirname + '/public')); //app.use(express.static(path.join(application_root, "public"))); app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); }); /** * Main route */ app.get('/', function (req, res, next) { console.log("getting /"); Project.findAll() .success(function (projects) { res.render('index', { projects: projects }); }) .error(next); }); </code></pre> <p>And here is part of my client-side main.js:</p> <pre><code> $('#spec').click(function(ev){ var form = $(this); $.ajax({ url: "http://www.mapquestapi.com/geocoding/v1/address?key=&lt;mykey&gt;" , type: 'POST' , datatype: 'json' , contentType: 'json' , data: { location : { "postalCode":"99999" } , options : { thumbMaps : false} } , success: function(resp){ $('#mapdata').html(resp); } , error : function(resp){ $('#mapdata').html(resp); } }); }); </code></pre> <p>Here are my request headers in chrome dev window:</p> <pre><code>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:accept, origin, content-type Access-Control-Request-Method:POST Connection:keep-alive Host:www.mapquestapi.com Origin:http://localhost:3000 Referer:http://localhost:3000/ User-Agent:Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.43 Safari/537.31 </code></pre> <p>And here are response headers:</p> <blockquote> <p>Allow:TRACE, OPTIONS Content-Length:0 Date:Sun, 07 Apr 2013 03:18:48 GMT Server:Apache-Coyote/1.1</p> </blockquote> <p>And here is the error message:</p> <pre><code>Origin http://localhost:3000 is not allowed by Access-Control-Allow-Origin. </code></pre>
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    1. COWhat's with the `Server: Apache-Coyote/1.1`? That's not a normal Node thing. Is your application running behind a proxy? If so, it might be stripping those headers.
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    2. CONot running behind an apache proxy...that is indeed odd
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