On Tue, 12 Feb 2019 17:45:01 +0900,
Nirav Patel wrote:
>
> [1 <multipart/related (7bit)>]
> [1.1 <multipart/alternative (7bit)>]
> [1.1.1 <text/plain; UTF-8 (7bit)>]
> Hello
> I am trying to send a GET request to RYU api
> Server running RYU controller
> http://192.168.52.142:8080/stats/switches
> When i send this request from a web browser or through POSTMAN application
> i get the response.
>
> But when i try to use a javaScript i get CORS error.
> *Access to XMLHttpRequest at 'http://192.168.52.142:8080/stats/switches
> <http://192.168.52.142:8080/stats/switches>' from origin 'null' has been
> blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present
> on the requested resource.*
>
> I am new to javascripting and I am unable to resolve this issue. I am
> posting my Java script along with the headers that i receive in response.
> Can someone help me resolve this issue/
I'm not quite familiar to javascript but AFAIK the CORS thing is to
limit cross-site attacks. Maybe you put your javascript somewhere else
than 192.168.52.142 or as a local file?
>
> function switchCount(){
> var xhttp = new XMLHttpRequest();
> xhttp.open("GET", "http://192.168.52.142:8080/stats/switches";, true);
> xhttp.send();
> //when xhttp state changes
> xhttp.onreadystatechange = function() {
> if (this.readyState == 4 && this.status == 200) {
> // Typical action to be performed when the document is ready:
> console.log('Request Successful');
> http_request.withCredentials = true;
> document.getElementById("flowrule").innerHTML = xhttp.responseText;
> }
> };
> }
--
IWAMOTO Toshihiro
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