REST calls across site collections?

Question

Having trouble finding a clear answer on this but can I do REST calls to a library across Site Collections within the same domain?

So if I have mysite.com/r/Site1 and mysite.com/r/Site2

Given permissions on Site 1 are set to everyone in the AD can read. Will I be able from Site 2 to return documents from a list in Site 1 using the REST API?

I know I can use the Search API but I'm curious about REST

Answer 1

If the both Site Collections are under the same hostname (for example https://my.site.com for both of them), and if the user has the correct permissions, then yes you can use REST.

Answer 2

Call below function in site1.

siteUrl is url of your second site listName is name of list from which you want to get detail.

function getListItem(siteUrl, listName) {
    $.ajax({
        url: siteUrl + "/_api/web/lists/getbytitle('" + listName + "')/items",
        type: "GET",
        contentType: "application/json;odata=verbose",            
        headers: {
            "Accept": "application/json;odata=verbose",
            "X-RequestDigest": $("#__REQUESTDIGEST").val()
        },
        success: function (data) {
            console.log(data.d);
        },
        error: function (data) {

        }
    });
}