Update item in list using rest api - failed when browsing in juniper session

Question

this issue is about browsing to an on premises sharepoint 2013 inside a LAN using Juniper session
the user can see everything and can create new list items with rest api but
cannot update existing items using the function below.
we've got this function which we use to update list items in rest
it works like a charm when browsing inside the LAN
function updateListItem(itemIdentityField, itemIdentity, listName, siteUrl, item, success, failure) {
getListItemWithId(itemIdentityField, itemIdentity, listName, siteUrl, function (data) {
$.ajax({
url: data.__metadata.uri,
type: "POST",
contentType: "application/json;odata=verbose",
data: JSON.stringify(item),
headers: {
"Accept": "application/json;odata=verbose",
"X-RequestDigest": $("#__REQUESTDIGEST").val(),
"X-HTTP-Method": "MERGE",
"If-Match": data.__metadata.etag
success: function (data) { success(data, callBackIndex, null) },
error: function (data) {
getError(data);
}, function (data) {
failure(data);
the error i get in ULS log is:
Original error: Microsoft.SharePoint.Client.InvalidClientQueryException: The parameter __metadata does not exist in method GetItemByStringId.
at Microsoft.SharePoint.Client.MethodInformation.GetParameter(String parameterName)
at Microsoft.SharePoint.Client.ClientCallableEdmModelBuilder.CreateFunctionImportForMethodBodyParser(MethodInformation clientMethod, List`1 parameterNames, ProxyContext proxyContext)
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.ParseParametersFromBody(MethodInformation methodInfo, Boolean allowPostBodyAccess, Boolean isLeafSegment, ClientValueCollection args)
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.ParseParametersFromBodyOrQueryString(MethodInformation methodInfo, Boolean allowPostBodyAccess, Boolean isLeafSegment, ClientValueCollection args)
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.CreateMethodArgumentsUsingNamedParameters(MethodInformation methodInfo, IList`1 parameterList, Boolean isLeafSegment, Boolean allowPostBodyAccess)
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.InvokeMethod(Boolean mainRequestPath, Object value, ServerStub serverProxy, EdmParserNode node, Boolean resourceEndpoint, MethodInformation methodInfo, Boolean isExtensionMethod, Boolean isIndexerMethod)
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.GetObjectFromPathMember(Boolean mainRequestPath, String path, Object value, EdmParserNode node, Boolean resourceEndpoint, MethodInformation& methodInfo)
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.GetObjectFromPath(Boolean mainRequestPath, String path, String pathForErrorMessage)
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.Process()
at Microsoft.SharePoint.Client.Rest.RestRequestProcessor.ProcessRequest()
at Microsoft.SharePoint.Client.Rest.RestService.ProcessQuery(Stream inputStream, IList`1 pendingDisposableContainer)
Any help?
Somebody?
Thanks

Answer 1

Hi patrik
Really appreciate your replying.
Could you try and refer to the issues below:
 this error occurs even with site collection administrator (i tested it with three different
users)
there isnt any difference between items in list - all have same permissions
it occurs in several lists in site (all lists have same permissions)
if browsing inside the LAN everything works just fine
updating from the UI works fine in all means
It really seems like a Rest related problem(is there anyone from the Microsoft REST team who can take look at this error?)
Thanks
Hushay