c# - Get Current User within WCF Web service using CSOM on Sharepoint 2010 -

the key part here application running within wcf web service application, , being called url. setup wcf service identical tutorial - https://jobrocol.wordpress.com/2012/06/03/custom-rest-wcf-service-in-sharepoint-2010/comment-page-1/

i created small test, console application. code works intended:

using sp = microsoft.sharepoint.client;  public static void addnewitemtosplist() {     string siteurl = "http://my.domain.com/";     string subsite = "temp/subsite";     string splist = "generictestlist";      bool returnval = false;     try {         using (clientcontext clientctx = new clientcontext(siteurl + subsite)) {             // default credentials             clientctx.credentials = credentialcache.defaultnetworkcredentials;              if (doesuserhavepermissions(clientctx, splist, permissionkind.addlistitems)) {                  sp.list olist = clientctx.web.lists.getbytitle(splist);                  listitemcreationinformation itemcreateinfo = new listitemcreationinformation();                 listitem olistitem = olist.additem(itemcreateinfo);                 olistitem["title"] = "test";                  olistitem.update();                  // add new list item                 clientctx.executequery();             }         }     } catch (exception e) {         console.writeline(e.tostring());     } }  public static bool doesuserhavepermissions(clientcontext ctx, string listname, permissionkind permmask) {     try {         sp.list targetlist = ctx.web.lists.getbytitle(listname);         ctx.load(targetlist, t => t.effectivebasepermissions);         ctx.executequery();         return targetlist.effectivebasepermissions.has(permmask);     } catch {         return false;     } }  static void main(string[] args) {     addnewitemtosplist(); } 

however, when try similar within wcf application, errors. pretty 401 access denied errors.

i pretty sure issue how i'm getting clientctx.credentials, i've tried of ways logged in user creds sp site none seem working.

any advice? can include of wcf code pretty identical stand-alone console app proof-of-concept code above.