Post request to golang server using polymer core-ajax? - ajax

Question

I am trying to make a POST request using polymer core-ajax to server runnung golang. After a lot of search (because i am new to this stuff) i ended up with the following code. Also, GET request is working perfect. POST parameters i dont understand how to pass using core-ajax.
<polymer-element name="register-user" attributes="url">
<template>
<core-ajax id="ajaxSubmit" url="{{url}}" contentType="application/json" handleAs="json" method="post" on-core-response="{{response}}"></core-ajax>
<style type="text/css">
</style>
</template>
<script>
Polymer({
buttonListener: function() {
var data = '{"Name":"'+ this.name +'", "Email":"'+ this.email +'"}';
this.$.ajaxSubmit.data = data;
this.$.ajaxSubmit.go();
console.log(data);
},
response: function(oldValue){
console.log(this.response);
}
});
</script>
</polymer-element>
above code returns 500 (Internal Server Error) however when i make a POST request using curl i.e
curl -i -H 'Content-Type: application/json' -d '{"Name":"Batman",
"Email":"batman#gmail.com"}' http://so.me.ip.ad:8080/register
it works as it should and returns
HTTP/1.1 200 OK
Content-Type: application/json
X-Powered-By: go-json-rest
Date: Wed, 29 Apr 2015 05:40:15 GMT
Content-Length: 117
{
"id": 3,
"name": "Batman",
"email": "batman#gmail.com",
"createdAt": "2015-04-29T05:40:15.073491143Z"
}
also, i have a CORS middleware set up on server i.e
api.Use(&rest.CorsMiddleware{
RejectNonCorsRequests: false,
OriginValidator: func(origin string, request *rest.Request) bool {
return origin == "http://0.0.0.0:8000"
},
AllowedMethods: []string{"GET", "POST", "PUT"},
AllowedHeaders: []string{
"Accept", "Content-Type", "X-Custom-Header", "Origin"},
AccessControlAllowCredentials: true,
AccessControlMaxAge: 3600,
})
What am i doing wrong? Any feedback will be of great help! Thanks ^.^
Edit : here is a little more info if it can help..

Answer 1

I think CORS is a red herring. The problem may be that you are sending the data form-encoded and not as json. I found a bug from a user with a similar problem.
HTTP/1.1 500 Internal Server Error
Content-Type: application/json
X-Powered-By: go-json-rest
Date: Fri, 12 Dec 2014 04:29:59 GMT
Content-Length: 71
{
"Error": "invalid character '\\'' looking for beginning of value"
}
Perhaps you should use .body instead of .data? See this answer.
From the polymer documentation:
body: Optional raw body content to send when method === "POST".
Example:
<core-ajax method="POST" auto url="http://somesite.com"
body='{"foo":1, "bar":2}'>
</core-ajax>