SharePoint 2013 Use the cross-domain library in a tenant-scoped app (REST)

SharePoint 2013 Use the cross-domain library in a tenant-scoped app (REST)

Step1: vs2012 -> file -> new -> project.

Step2: templates -> visual c# -> office/sharepoint -> app -> app for sharepoint -> name (CrossDomainTenantScopeREST)

 Step3: CrossDomainTenantScopeREST -> Scripts -> right click -> add -> new item -> Visual C# items -> web -> javascript file -> Name (CrossDomainExec.js)

Open CrossDomainExec.js file and add below script

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var hostweburl;

var appweburl; 

$(document).ready(function () {

    hostweburl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));

    appweburl = decodeURIComponent(getQueryStringParameter("SPAppWebUrl"));

    var scriptbase = hostweburl + "/_layouts/15/";

    $.getScript("/_layouts/15/SP.RequestExecutor.js");

}); 

function execCrossDomainRequest() {

    var executor;

    executor = new SP.RequestExecutor(appweburl);

    executor.executeAsync(

        {

            url: appweburl + "/_api/SP.AppContextSite(@target)/web?@target='" + document.getElementById("sitecoll1").value + "'",

            method: "GET",

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

            success: successHandler,

            error: errorHandler

        }

    );

} 

function successHandler(data) {

    document.getElementById("WebTitles").innerHTML = "";

    var jsonObject = JSON.parse(data.body);

    var oli = document.createElement("li");

    oli.innerText = jsonObject.d.Title + " (" + jsonObject.d.Url + ")";

    document.getElementById("WebTitles").appendChild(oli);

}

function errorHandler(data, errorCode, errorMessage) { 

    var oli = document.createElement("li");

    oli.innerText = "Could not complete cross-domain call: " + errorMessage;

    document.getElementById("WebTitles").appendChild(oli);

} 

function getQueryStringParameter(paramToRetrieve) {

    var params = document.URL.split("?")[1].split("&");

    var strParams = "";

    for (var i = 0; i < params.length; i = i + 1) {

        var singleParam = params[i].split("=");

        if (singleParam[0] == paramToRetrieve)

            return singleParam[1];

    }

}

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Step4:

CrossDomainTenantScopeREST -> pages -> default.aspx

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<%@ Page Inherits="Microsoft.SharePoint.WebPartPages.WebPartPage, Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" MasterPageFile="~masterurl/default.master" Language="C#" %> 

<%@ Register TagPrefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<%@ Register TagPrefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<%@ Register TagPrefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> 

<asp:Content ContentPlaceHolderID="PlaceHolderAdditionalPageHead" runat="server">

    <script type="text/javascript" src="../Scripts/jquery-1.9.1.min.js"></script>

    <script type="text/javascript" src="/_layouts/15/sp.runtime.js"></script>

    <script type="text/javascript" src="/_layouts/15/sp.js"></script>

    <meta name="WebPartPageExpansion" content="full" />

    <link rel="Stylesheet" type="text/css" href="../Content/App.css" />

    <script type="text/javascript" src="../Scripts/App.js"></script>

    <script type="text/javascript" src="../Scripts/CrossDomainExec.js"></script>

</asp:Content>

<asp:Content ContentPlaceHolderID="PlaceHolderPageTitleInTitleArea" runat="server">

    Page Title

</asp:Content>

<asp:Content ContentPlaceHolderID="PlaceHolderMain" runat="server">

    <div>

        <p id="message">

            initializing...

        </p>

    </div>

    <br />

    <p>

        Site collection 1:&nbsp;<input id="sitecoll1" type="text" style="width: 400px;" />

        <br />

        <input value="Go" type="button" onclick="execCrossDomainRequest();" />

    </p>

    Web titles:<br />

    <ul id="WebTitles"></ul>

</asp:Content>

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Step5: deploy (F5)

App gives below error message. because app don't have permission to read site collection data.

Step6: To privide permission to app, go to CrossDomainTenantScopeREST -> AppManifest.xml (double click) -> permissions ->

Scope: Tenant

Permission: Read

and deploy (F5) now again.

 
Thank You.