[polymer-dev] No 'Access-Control-Allow-Origin' header is present on the requested resource

[Abhilash Sathe]

XMLHttpRequest cannot load http://serverthati'mrequesting.com?id=1. No
'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'http://localhost:8080' is therefore not allowed access. I used CORS
add on in chrome and then it works. But otherwise it doesn't. How can I fix
this? I'm using node js server. polymer-cli tools.


<*iron-ajax*

*id=**"requestRepos"*

*headers=**'{"Accept": "*/*"}'*


*url=**"*http://serverthati'mrequesting.com*"*

*params=**"{{requestParams}}"*

*handle-as=**"json"*

*on-response=**"handleResponse" *></*iron-ajax*>

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[Daniel Llewellyn]

Post by Abhilash Sathe
XMLHttpRequest cannot load http://serverthati'mrequesting.com?id=1. No
'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'http://localhost:8080' is therefore not allowed access. I used
CORS add on in chrome and then it works. But otherwise it doesn't. How can
I fix this? I'm using node js server. polymer-cli tools.

The server that is hosting your javascript and html imports (serverthati'
mrequesting.com per your example) needs to add the HTTP header (the
domain-name in your example should be "localhost"):

Access-Control-Allow-Origin: <domain-name of your site>

OR to allow everyone to use those assets:

Access-Control-Allow-Origin: *

The actual configuration of your server is probably beyond the scope of
this list. If "serverthati'mrequesting.com" is running Apache then you can
find documentation here:
https://httpd.apache.org/docs/current/mod/mod_headers.html#header Which
suggests to add into your server config a line similar to (for your
example):

Header add Allow-Access-Control-Origin localhost

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[Daniel Llewellyn]

Post by Daniel Llewellyn
Header add Allow-Access-Control-Origin localhost

I mistyped the header name here. It should be
"Access-Control-Allow-Origin". Sorry :-)

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[Abhilash Sathe]

Yes, it's an Apache Tomcat server. So, I guess, I'll need to add the the
Allow CORS tag snippet in that.

Post by Daniel Llewellyn

Post by Abhilash Sathe
XMLHttpRequest cannot load http://serverthati'mrequesting.com?id=1. No
'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'http://localhost:8080' is therefore not allowed access. I used
CORS add on in chrome and then it works. But otherwise it doesn't. How can
I fix this? I'm using node js server. polymer-cli tools.

The server that is hosting your javascript and html imports (serverthati'
mrequesting.com per your example) needs to add the HTTP header (the
Access-Control-Allow-Origin: <domain-name of your site>
Access-Control-Allow-Origin: *
The actual configuration of your server is probably beyond the scope of
this list. If "serverthati'mrequesting.com" is running Apache then you
https://httpd.apache.org/docs/current/mod/mod_headers.html#header Which
suggests to add into your server config a line similar to (for your
Header add Allow-Access-Control-Origin localhost

Follow Polymer on Google+: plus.google.com/107187849809354688692
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