Sharepoint 2013 via REST API: Error 403 Forbidden when trying to create item

Question

I\'m trying to create a simple list item with the rest api on Sharepoint 2013. My code:

$.ajax({
    url: siteUrl + \"/_api/web/lists/getByTitle(\'internal_L         


        

Answer 1

Most likely this error occurs since form digest has been expired on the page.

In that case you could acquire a new form digest value by making a POST request to /_api/contextinfo endpoint.

Example

function getFormDigest(webUrl) {
    return $.ajax({
        url: webUrl + "/_api/contextinfo",
        method: "POST",
        headers: { "Accept": "application/json; odata=verbose" }
    });
}


function createListItem(webUrl, listName, itemProperties) {
    return getFormDigest(webUrl).then(function (data) {

        return $.ajax({
            url: webUrl + "/_api/web/lists/getbytitle('" + listName + "')/items",
            type: "POST",
            processData: false,
            contentType: "application/json;odata=verbose",
            data: JSON.stringify(itemProperties),
            headers: {
                "Accept": "application/json;odata=verbose",
                "X-RequestDigest": data.d.GetContextWebInformation.FormDigestValue
            }
        });
    });
}

Usage

//Create a Task item
var taskProperties = {
    '__metadata': { 'type': 'SP.Data.WorkflowTasksItem' },
    'Title': 'Order approval'
};

createListItem(_spPageContextInfo.webAbsoluteUrl, 'Workflow Tasks', taskProperties)
.done(function (data) {
    console.log('Task has been created successfully');
})
.fail(function (error) {
    console.log(JSON.stringify(error));
});