VOLCANO BOX PROXY SERVER INSTALL

It then relays the response returned by the remote server directly back to your application. Instead of sending the request for the remote resource directly to the web server that hosts it, your application sends the request to the proxy page on your server first, and the proxy then forwards the request to the remote server.

VOLCANO BOX PROXY SERVER INSTALL

If you cannot rely on CORS, then you need to install and configure a proxy page on your web server. ArcGIS Server 10.1 and above supports CORS out of the box, but there are still many servers out there (including some of EsriвЂ™s own servers) that donвЂ™t.ДЄssuming both these things are in place, then you are good to go.

The server that hosts the resource that you want must also support CORS.

Many modern browsers do, but you can check yours at

In order for your web application to use CORS, two things have to happen: It is an extension to the standard HTTP protocol that allows servers to use new headers in their requests (Origin, and Access-Control-Allow-Origin) which explicitly allow access to resources on other servers that would otherwise have been forbidden by the same origin policy. CORS stands for Cross Origin Resource Sharing. There have been a number of different workarounds for this, but the ones that interest us most as ArcGIS Server API for JavaScript developers are CORS and the proxy page. Which is all well and good as a general principle, but really gets in the way of things when weвЂ™re building web mapping applications which routinely pull in all sorts of different services residing on different hosts. This вЂњsame origin policyвЂќ is there to prevent a malicious script on one page from obtaining access to sensitive data on another web page.

Why? Because it is considered a security risk. In web development, if you build an application on your web server at В and then try and request a resource residing on another server (such as a map service running on ArcGIS Online) then the default behavior is to disallow the request. Before we get into the actual mechanics of working with the proxy page and CORS, letвЂ™s briefly outline what problem they are trying to solve.

Volcano box proxy server