SharePoint 2013 App Office 365 copy list item

Question

I try to build an SharePoint hosted app, have started with a custom menu action. When I choose it I want to copy the selected item and automatically change some metadata for it.

Problem is I can't get the data from the selected item.

I have tested this example but don't get it to work: Copy List items using REST/JSON

function copyListItem(webUrl, sourceListName, targetListName, listItemId) {
    getListItem(webUrl, sourceListName, listItemId,
    function (sourceItem) {
        //prepare item
        var copyItem = {};
        var targetItemType = GetItemTypeForListName(targetListName);
        copyItem['__metadata'] = { 'type': targetItemType };  //mandatory, do not remove metadata attribute!

        //specify explicitly what fields to copy here..
        //...
        copyItem['Title'] = sourceItem['Title']; //e.g. copy title

        createListItem(webUrl, targetListName, copyItem, function (targetItem) {
            complete(sourceItem, targetItem);
        }, failure);
    },
    failure);
    }
    function getListItem(webUrl, listName, listItemId) {
    $.ajax({
        url: webUrl + "/_api/web/lists/getbytitle('" + listName + "')/items(" + listItemId + ")",
        method: "GET",
        headers: { "Accept": "application/json; odata=verbose" },
        success: function (data) {
            complete(data.d);
        },
        error: function (data) {
            failure(data);
        }
    });
}

I'm trying with or without complete and failure but then I got

Uncaught ReferenceError: complete/failure is not defined ??

and when I use complete and failure in calls I get :

XMLHttpRequest cannot load http://dev1.sp2013.local/_api/web/lists/getbytitle('skistardoks')/items(33). No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://app-33cc412e378e5f.app.dev1.sp2013.local' is therefore not allowed access. The response had HTTP status code 401.

--

using this call is ok?

$.getScript(scriptbase + 'SP.RequestExecutor.js', getListItem(hostweburl, "skistardoks", "33", "complete", "failure")); 

new code:

function getListItem(webUrl, listName, listItemId, complete, failure) {
    var executor = new SP.RequestExecutor(appweburl);
    executor.executeAsync({
        url: webUrl + "/_api/SP.AppContextSite(@target)/web/lists/getbytitle('" + listName + "')/items(" + listItemId + ")?@target='" + encodeURIComponent(webUrl) + "'",
        method: "GET",
        headers: { 'Accept': 'application/json; odata=verbose' }, // consider using the other odata options that have a lower payload
        success: function (data) {
            complete(data.d);
        },
        error: function (data) {
            failure(data);
        }
    });

error in

Uncaught Error: Invalid field or parameter requestInfo.url. SP.RequestExecutor.js:2

Answer 1

In order to modify data on the host site you need to use the Cross-Domain Library. For SharePoint-Hosted apps, this is the Sp.RequestExecutor.js library. To get your code to work, simply replace the $.ajax() with the cross-domain equivalent:

var executor = new SP.RequestExecutor(appweburl);
executor.executeAsync({
    url: appweburl + "/_api/SP.AppContextSite(@target)/web/lists/getbytitle('" + listname + "')/items(" + listItemId + ")?@target='" + encodeURIComponent(webUrl) + "'",
    method: "GET",
    headers: { 'Accept' : 'application/json; odata=verbose' }, // consider using the other odata options that have a lower payload
    success: function(data) {
        complete(data.d);
    },
    error: function(data) {
        failure(data);
    }
});

Note that the executor uses method in place of type, and body in place of data.

In order to access the library, either utilize $.getScript(), or add the following script tag:

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

Here is a working example from Microsoft.