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I am creating a provider hosted app for SharePoint online and trying to get a list using rest API in a view but I am getting
403 error access denied error.
I have already set permissions in app Manifest file (Web- Full control). Do I need to do something else?
Try to use cross domain library for this. Sample code:
<html>
<head>
<title>Cross-domain sample</title>
</head>
<body>
<!-- This is the placeholder for the announcements -->
<div id="renderAnnouncements"></div>
<script
type="text/javascript"
src="//ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js">
</script>
<script type="text/javascript">
var hostweburl;
var appweburl;
// Load the required SharePoint libraries
$(document).ready(function () {
//Get the URI decoded URLs.
hostweburl =
decodeURIComponent(
getQueryStringParameter("SPHostUrl")
);
appweburl =
decodeURIComponent(
getQueryStringParameter("SPAppWebUrl")
);
// 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 add-in web URL.
var executor = new SP.RequestExecutor(appweburl);
// Issue the call against the add-in web.
// To get the title using REST we can hit the endpoint:
// appweburl/_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:
appweburl +
"/_api/web/lists/getbytitle('Announcements')/items",
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 announcementsHTML = "";
var results = jsonObject.d.results;
for (var i = 0; i < results.length; i++) {
announcementsHTML = announcementsHTML +
"<p><h1>" + results[i].Title +
"</h1>" + results[i].Body +
"</p><hr>";
}
document.getElementById("renderAnnouncements").innerHTML =
announcementsHTML;
}
// Function to handle the error event.
// Prints the error message to the page.
function errorHandler(data, errorCode, errorMessage) {
document.getElementById("renderAnnouncements").innerText =
"Could not complete cross-domain call: " + errorMessage;
}
// Function to retrieve a query string value.
// For production purposes you may want to use
// a library to handle the query string.
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];
}
}
</script>
</body>
Some links for your reference. https://dev.office.com/sharepoint/docs/sp-add-ins/access-sharepoint-data-from-add-ins-using-the-cross-domain-library
