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I am trying to perform a cross domain request from SharePoint hosted add-in to a wcf service in provider hosted add-in.

I have a hybrid setup as below:

  • SharePoint Office 365 site online, Azure subscription & other required elements in Azure AD
  • A SharePoint hosted Add-in with a custom action and custom page, deployed successfully.
  • A provider hosted Add-in which has a wcf RESTfulservice, deployed and published successfully. I see the correct response when requested through browser.

Scenario: On a button click from a SharePoint hosted Add-in page, I would like to perform a cross domain request to WCF service which is hosted in Provider hosted Add-in. So ideally I am trying to get information from host web & perform some updates. But to start off , there is only one operation contract returning a string.

Please find the sample JavaScript:


try {

   context = new SP.ClientContext(appWebUrl);

   var executor = new SP.RequestExecutor(appWebUrl);

   var localHostUrl = "http://amigosito365.azurewebsites.net/MyHybridService.svc/GetResponse";

   //var localHostUrl = appWebUrl + "/_api/SP.AppContextSite(@target)/web/title?@target='" +

   // hostWebUrl + "'";

   executor.executeAsync(

   {

      url: encodeURIComponent(localHostUrl),

      //url: localHostUrl,

      method: "GET",

      headers: { "Accept": "application/json; odata=verbose" },

      success: onQuerySucceeded,

      error: onQueryFailed,

      DataType: "jsonp"

   });

}

Using the above code, If I try to get the web title using the URL: //var localHostUrl = appWebUrl + "/_api/SP.AppContextSite(@target)/web/title?@target='" +

// hostWebUrl + "'";

I get the response json as expected however when I try to communicate with the RESTful service the response is not as excepted. I do not get any specific error and I am able to get in to the success call back function. But the body of data object has a big chunk of html and does not indicate any error.

On the other hand when I access the RESTful service in a web browser, I am seeing the response as expected.

Any help in solving the above issue would be really appreciated.

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Using SP.WebRequestInfo() to set the webservice url & execute the request through web proxy fixed the issues.

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