SharePoint Pals
 | Sign In
How to solve cross domain issue ( CORS ) in Asp.Net web application using IIS URL rewrite module
by Sriram Varadarajan 18 Feb 2015
Enterprise Architect
Today  :   10     Total  :    16011

In this article, let us see, How to solve Cross-origin resource sharing (CORS) issue using IIS Re-write module for any .Net Web Application that uses client call to perform advanced requests (POST, PUT, DELETE and other types of HTTP requests, along with specifying custom HTTP headers) .

To know what is CORS please refer to the below link:

Requirement:  Our requirement was to get data from SAP and bind to our web application using Angular JS.

Since we’re accessing 2 different domain here ( and SAP.COM) to avoid CORS issue we’re using IIS Re-write to route the request from MVC Application to SAP and bind the data back to MVC, the example and code mentioned below is used to achieve this requirement

Pre-Requisite to configure IIS Re-write:

1. Install Application Request Routing module to your IIS, you can find the install setup under

2. Download and Install Url Rewrite module – Head over to this link:

To enable IIS Re-write do the following:

  1. Open IIS manager. Double click on Application Request Routing Cache menu in centre pane. If you don’t see it, you’ve not installed it properly. Repeat the above steps or reboot the system, sometimes it helps.
  2. You’ll find Server Proxy Settings on right pane. Open it and check Enable Proxy option.

3. You’ll find URL Rewrite option in root level (computer name) as well as in added website. If you want to configure reverse proxy for all the requests coming to IIS, follow next procedure on root level URL rewrite otherwise do it on per website level(procedure remains same for both). Open URL Rewrite by double clicking on it

4. Create Server Variable HTTP_ACCEPT_ENCODING, it can be created inside URL REWRITE under VIEW SERVER VARIABLE





Set the default value to TRUE

5. Let’s add inbound rule and outbound rule by copying the below configuration to our web.config

Please place this in your .net application web.config  file

             <rule name="Inbound SAP" stopProcessing="true">
                 <match url="sap/(.*)" />
                     <add input="{CACHE_URL}" pattern="^(https?)://" />
                 <action type="Rewrite" url="{R:0}" />
                     <set name="HTTP_ACCEPT_ENCODING" value="True" />
             <rule name="OutBoutd SAP" preCondition="ResponseJSON">
                 <match filterByTags="A, Area, Base, Form, Frame, Head, IFrame, Img, Input, Link" pattern="http(s)?://*)" />
                 <action type="Rewrite" value="http(s)?://″ />
                 <preCondition name="ResponseJSON">
                     <add input="{RESPONSE_CONTENT_TYPE}" pattern="^application/json" />
     <directoryBrowse enabled="true" />


1. This will automatically create the URL redirection in your IIS website.

Above mentioned steps are to fix the CORS issue permanently but for some reason If you’re required to solve the CORS issue temporarily, please do the following.



Enable all the three highlighted options



1. Create a shortcut of your google CHROME EXE from the installed path

2. Right click go to properties

3. In the target type –disable-web-security


Click OK

Invoke this EXE and this will solve CORS issue temporally

Tags :  

blog comments powered by Disqus

SharePoint Pals

SharePoint Pals, a community portal for SharePoint developers, Administrators and End Users. Let's join hands and share the point together.
Read this on mobile


Angular Js Training In Chennai
Advanced Angular Js training with real world developer scenarios
Angular Js, Web Api and Ionic for .Net Developers
All in one client side application development for .Net developers
Angular Js For SharePoint Developers
Get ready for the future. Its no more just C#

Get Connected

SharePoint Resources

SharePoint 2013 and 2010 Web Parts
Free Web Parts with Source Code for SharePoint Community

SharePoint 2013 Books and Tutorials
Collection of free SharePoint 2013 books and tutorials (eBooks, pdfs)

Supported By

Contribute your article and be eligible for a one month Free Subscription for Plural Sight. The Author of the most popular New Article (published in the previous month) will be awarded with a Free One month Plural Sight Subscription. Article can be sent to in a word document.

Related Resources

Recent Tweets

Twitter January 15, 00:25
How To Enable Target Value And Actual Value In #D3 Gauge Chart

Twitter January 15, 00:24
How To Open #SharePoint List Hyperlink Column In Modal #Popup Window

Twitter January 15, 00:24
Quick Introduction To #Asp.NetCore And It’s Features

Twitter January 15, 00:22
How To Configure #PerformancePoint Services To Use Secure Store In #SharePoint 2013

Twitter January 15, 00:21
How To Block Or Disable #Office365 Services

Follow us @SharePointPals
Note: For Customization and Configuration, CheckOutRecent Tweets Documentation