I am getting error No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost' is therefore not allowed access.

Question

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I am using vs2010 in windows 7 OS.
I installed Tomcat-7.0.27 then i copied geoserver war file into it.

here Tomcat and geoserver is running fine(1.Tomcat: http://localhost:8085
2.Geoserver: http://localhost:8085/geoserver/index.html)

Then i created one wms layer in geoserver. its working fine.

I am calling the this wms layer in my web application.

ASP.NET

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm5.aspx.cs" Inherits="Maps_Google.WebForm5" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml"> 
  <head> 
    <link rel="stylesheet" href="http://openlayers.org/api/theme/default/style.css" type="text/css" /> 
    <link rel="stylesheet" href="http://openlayers.org/dev/examples/style.css" type="text/css" /> 
    <script type="text/javascript" src="http://openlayers.org/dev/OpenLayers.js"></script> 
        <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script> 
    <script type="text/javascript">

        var map;

        function init() {

            var options = {
                maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34, 20037508.34, 20037508.34),
                maxResolution: "auto",
                projection: new OpenLayers.Projection("EPSG:900913"),
                controls: [],
                units: 'm'
            };

            map = new OpenLayers.Map('map', options);

            map.addControl(new OpenLayers.Control.LayerSwitcher());

            var gsat = new OpenLayers.Layer.Google(
        "Google Physical",
        { type: google.maps.MapTypeId.TERRAIN, numZoomLevels: 22 }
    );

            var NE_image = new OpenLayers.Layer.WMS(
                    "cite:vietnam_IZ_V4 - Untiled", "http://10.81.5.31:8085/geoserver/cite/wms?", { LAYERS: 'cite:vietnam_IZ_V4', transparent: true }, { isBaseLayer: false }
                );

                      
            map.addLayers([gsat, NE_image]);

            // Google.v3 uses EPSG:900913 as projection, so we have to 
            // transform our coordinates 
//            map.setCenter(new OpenLayers.LonLat(0,0).transform(
//        new OpenLayers.Projection("EPSG:4326"),
//        map.getProjectionObject()
            //    ), 0);
            map.setCenter(new OpenLayers.LonLat(0, 0), 0);
            //map.zoomToMaxExtent();

            var bounds = new OpenLayers.Bounds(
                    103.98606273474692, 8.775560097336232,
                    109.40715417511227, 22.48734509850342
                );
            // build up all controls
            map.addControl(new OpenLayers.Control.PanZoomBar({
                position: new OpenLayers.Pixel(2, 15)
            }));
            map.addControl(new OpenLayers.Control.Navigation());
            map.addControl(new OpenLayers.Control.Scale($('scale')));
            map.addControl(new OpenLayers.Control.MousePosition({ element: $('location') }));
            format = 'image/png';

            //map.zoomToExtent(bounds);
            // support GetFeatureInfo
            map.events.register('click', map, function (e) {
                document.getElementById('nodelist').innerHTML = "Loading... please wait...";
                var params = {
                    REQUEST: "GetFeatureInfo",
                    EXCEPTIONS: "application/vnd.ogc.se_xml",
                    BBOX: map.getExtent().toBBOX(),
                    SERVICE: "WMS",
                    INFO_FORMAT: 'text/html',
                    QUERY_LAYERS: map.layers[1].params.LAYERS,
                    FEATURE_COUNT: 50,
                    "Layers": 'cite:vietnam_IZ_V4',
                    WIDTH: map.size.w,
                    HEIGHT: map.size.h,
                    format: format,
                    styles: map.layers[1].params.STYLES,
                    srs: map.layers[1].params.SRS
                };

                // handle the wms 1.3 vs wms 1.1 madness
                if (map.layers[1].params.VERSION == "1.3.0") {
                    params.version = "1.3.0";
                    params.j = parseInt(e.xy.x);
                    params.i = parseInt(e.xy.y);
                } else {
                    params.version = "1.1.1";
                    params.x = parseInt(e.xy.x);
                    params.y = parseInt(e.xy.y);
                }

                // merge filters
                if (map.layers[1].params.CQL_FILTER != null) {
                    params.cql_filter = map.layers[1].params.CQL_FILTER;
                }
                if (map.layers[1].params.FILTER != null) {
                    params.filter = map.layers[1].params.FILTER;
                }
                if (map.layers[1].params.FEATUREID) {
                    params.featureid = map.layers[1].params.FEATUREID;
                }
                //OpenLayers.ProxyHost = "C:\\Users\\kdonipar1\\Downloads\\proxy.cgi?url=";
                OpenLayers.loadURL("http://10.81.5.31:8085/geoserver/cite/wms", params, this, setHTML, setHTML);
                OpenLayers.Event.stop(e);
            });
        }
        function setHTML(response) {
            document.getElementById('nodelist').innerHTML = response.responseText;
        };
    </script> 
  </head> 

  <body onload="init()"> 
    <h1 id="title">OpenLayers: Google Layer Example</h1> 
    <div id="map" class="smallmap" style="width: 100%; height: 500px;"></div> 
    <div id="nodelist">
            Click on the map to get feature info
        </div>
  </body> 

</html>

When i click on the map marker points in chrome I am getting the below Error

Error:
"XMLHttpRequest cannot load http://10.81.5.31:8085/geoserver/cite/wms?REQUEST=GetFeatureInfo&EXCEPTIONS…00&format=image%2Fpng&styles=&srs=EPSG%3A900913&version=1.1.1&x=1226&y=116. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost' is therefore not allowed access."

This error coming only in the chrome.
Its works fine in IE, and Its displaying the map marker information when I click on the marker.

Later searching in google I fixed it but adding in the shortcut of google chrome : --disable-web-security.
But this is not a feasible solution.

I tried adding web.config file

XML

<system.webServer>
     <modules runAllManagedModulesForAllRequests="true" />
    <httpProtocol>
      <customHeaders>
        <!-- Enable Cross Domain AJAX calls -->
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept" />
        <add name="Access-Control-Allow-Methods" value="GET,PUT,POST,DELETE,OPTIONS" />
      </customHeaders>
    </httpProtocol>

This is also not successful.
Please give me your suggestions how do I can overcome this problem.

Posted 28-Aug-14 19:06pm

D-Kishore

Updated 1-Sep-14 19:58pm

v11

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Comments

Kornfeld Eliyahu Peter 1-Sep-14 1:43am

If I understand it right localhost and 10.81.5.31 are the same web server - try to use only one of them in your test...

D-Kishore 1-Sep-14 2:31am

Yes you are right both IIS and geoserver are in the same system, how can i use only one of them. Please guide me.
I am calling geoserver wms layer in my web application. it works fine in IE.

2 solutions

Solution 1

you might need to allow cross domain requests

[try this]

there is some perticular xml file that when included in your website folder allows that, couldn't find that.

Posted 1-Sep-14 21:24pm

saxenaabhi6

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D-Kishore · Accepted Answer · 2014-09-01T21:55:00

Yes I did it,

Created one generic handler for my project named as xDomainProxy.ashx

and add the below code

C#

using System;
using System.Web;
 
public class xDomainProxy : IHttpHandler {
     
    public void ProcessRequest (HttpContext context) {
 
        //OpenLayers.ProxyHost = 'xdomainProxy.aspx?url=' so the requested url is passed in a url param
        string requestUrl = HttpUtility.UrlDecode(context.Request.QueryString["url"]);
 
        //test if the request string was passed and of so request data from the destination server
        if (requestUrl != null)
        {
            //create a new HttpWebRequest
            System.Net.HttpWebRequest webRequest;
            webRequest = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(requestUrl);
            webRequest.Method = "GET";
 
            System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)webRequest.GetResponse();
 
            //check if the data was successfully retrieved
            if (response.StatusCode.ToString().ToLower() == "ok")
            {
                //set the appropriate response content type
                context.Response.ContentType = response.ContentType;
 
                //Read the stream associated with the response.
                System.IO.StreamReader reader = new System.IO.StreamReader(response.GetResponseStream());
 
                //and write it to response
                context.Response.Write(reader.ReadToEnd());
            }
        }
    }
  
    public bool IsReusable {
        get {
            return false;
        }
    }
}

then called in my javascript code
setting up a proxyHost in OpenLayers:

JavaScript

//proxy host
OpenLayers.ProxyHost = 'xDomainProxy.ashx?url=';