Setting “User-Agent” HTTP header in ClientWebSocket

Question

I need to set the \"User-Agent\" HTTP header in a ClientWebSocket object, but it is not possible. Although there is a ClientWebSocket.SetRequestHeader(hea

Answer 1

    //use reflection to remove IsRequestRestricted from headerInfo hash table
    Assembly a = typeof(HttpWebRequest).Assembly;
    foreach (FieldInfo f in a.GetType("System.Net.HeaderInfoTable").GetFields(BindingFlags.NonPublic | BindingFlags.Static))
    {
        if (f.Name == "HeaderHashTable")
        {
            Hashtable hashTable = f.GetValue(null) as Hashtable;
            foreach (string sKey in hashTable.Keys)
            {

                object headerInfo = hashTable[sKey];
                //Console.WriteLine(String.Format("{0}: {1}", sKey, hashTable[sKey]));
                foreach (FieldInfo g in a.GetType("System.Net.HeaderInfo").GetFields(BindingFlags.NonPublic | BindingFlags.Instance))
                {

                    if (g.Name == "IsRequestRestricted")
                    {
                        bool b = (bool)g.GetValue(headerInfo);
                        if (b)
                        {
                            g.SetValue(headerInfo, false);
                            Console.WriteLine(sKey + "." + g.Name + " changed to false");
                        }

                    }
                }

            }
        }
    } 

More info here: Cannot set some HTTP headers when using System.Net.WebRequest