I have a web page hosted on a server, say at http://SVR1/path/index.html, and I would like to access some list items in a on-premises SharePoint site hosted on another server, say at http://SVR2/sites/mySite/.
The current installation of SharePoint I am using (not under my control) does not allow deployment of neither SharePoint-hosted nor Provider-hosted apps, so I am trying to use the SharePoint Cross-Domain library to access the desired list items from a purely external HTML5/JS/CSS3 page. I, as a user, have full access rights to the list in my SharePoint site, so I guess it should be no problem reading its items.
Following an example found here, my page is as follows:
<!doctype html>
<html>
<head>
<!-- Title -->
<title>Application Template</title>
<script language="javascript" type="text/javascript" src="js/jquery.js"></script>
<script language="javascript" type="text/javascript">
var hostweburl = "http://SVR2/sites/mySite";
var appweburl = "http://SVR1/path";
// Load the required SharePoint libraries
$(document).ready(function () {
$("#renderList").html("Requesting Lists...");
// resources are in URLs in the form:
// web_url/_layouts/15/resource
var scriptbase = hostweburl + "/_layouts/15";
// Load the js files and continue to the successHandler
$.getScript(scriptbase + "/SP.RequestExecutor.js", execCrossDomainRequest);
});
///////////////////////////////////////////////////////
// Function to prepare and issue the request to get
// SharePoint data
function execCrossDomainRequest() {
// executor: The RequestExecutor object
// Initialize the RequestExecutor with the app web URL.
var executor = new SP.RequestExecutor(appweburl);
// Issue the call against the host web.
// To get the title using REST we can hit the endpoint:
// hostweburl/_api/web/lists/getbytitle('listname')/items
// The response formats the data in the JSON format.
// The functions successHandler and errorHandler attend the
// sucess and error events respectively.
executor.executeAsync(
{
url: hostweburl + "/_api/web/lists",
method: "GET",
headers: { "Accept": "application/json; odata=verbose" },
success: successHandler,
error: errorHandler
}
);
}
///////////////////////////////////////////////////////
// Function to handle the success event.
// Prints the data to the page.
function successHandler(data) {
var jsonObject = JSON.parse(data.body);
var listsHTML = "";
var results = jsonObject.d.results;
for (var i = 0; i < results.length; i++) {
listsHTML = listsHTML +
"<p><h1>" + results[i].Title +
"</h1>" + results[i].Body +
"</p><hr>";
}
document.getElementById("renderList").innerHTML =
listsHTML;
}
///////////////////////////////////////////////////////
// Function to handle the error event.
// Prints the error message to the page.
function errorHandler(data, errorCode, errorMessage) {
document.getElementById("renderList").innerText =
"Could not complete cross-domain call: " + errorMessage;
}
</script>
</head>
<body>
<h1 id="Root Page" style="text-align:center;">This is the home page</h1>
<div id="renderList">Placeholder</div>
</body>
</html>
When I load the page in a browser, in the javascript console I get an error: "Uncaught Error: Invalid field or parameter requestInfo.url.".
I am under the impression that the problem is in the content of variable appweburl that, in all the examples I have found, is provided by SharePoint as part of the query part in the URL. But this implies that a provider-hosted app has been deployed in SharePoint - something I cannot do - and that this app is calling its remotely hosted counterpart.
So the question is: Is it possible to use SharePoint cross-domain library in a page totally external to SharePoint, and if yes, how should I set hostweburl, appweburl and maybe other things to have access to SharePoint lists?
Thanks in advance.
