change the user agent

Question

User1024191908 posted

I have made a class that inherits from IHttpModule and set an event like below:

        public void Init(HttpApplication app)
        {
            app.BeginRequest += new EventHandler(BeginReq);
        }
        public void BeginReq(object sender,EventArgs e)
        {

            NameValueCollection headers = HttpContext.Current.Request.Headers;
            headers.Remove("User-Agent");
            headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko");
        }

but when I check the user agent in my  default.aspx page:

            string agent = Request.UserAgent;

It is still not what I have manually set.

what did I do wrong?

thanks in advance.

Answer 1

User-369506445 posted

hi

you can define that in your Global file , please below code in your Global.asax

public class Global : HttpApplication
    { 
        protected void Application_BeginRequest(object sender, EventArgs e)
        {
            NameValueCollection headers = HttpContext.Current.Request.Headers;
            headers.Remove("User-Agent");
            headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.3; Trident/7.0; rv:11.0) like Gecko");
        }
    }

and for each request first that method and you can put a break-point and try it.

Answer 2

User1024191908 posted

I works.

now when I check the Request.Headers i see it is set.

but when I check the Request.UserAgent it is the same old value.

why?

Answer 3

User-369506445 posted

 I didn't  get your mean . if your mean is that user agent never change . you can debug it . I try that and it change . if your mean is another ,Please explain more details about your problem

you con try the below  code :

protected void Page_Load(object sender, EventArgs e)
        {
            NameValueCollection headers = HttpContext.Current.Request.Headers;
            var agent = headers["User-Agent"];
            Response.Write(agent);
        }

Answer 4

User475983607 posted
The user agent comes from the client. Can you explain the problem you are trying to solve as it does not make sense to change the HTTP request.

Answer 5

User1024191908 posted

I wanted to programatically do something like Emulation of Edge so the user agent sent to the server is what I want not the real one.

Answer 6

User753101303 posted

It tells how you are trying to solve some kind of problem rather than really which problem you are trying to solve. If you have some kind of HTML rendering issue with web forms using https://msdn.microsoft.com/en-us/library/ms228122(v=vs.100).aspx would be likely best rather than to pretend that each and every browser that hits your web site is Microsoft Edge.

Answer 7

User475983607 posted

anooshiravan

I wanted to programatically do something like Emulation of Edge so the user agent sent to the server is what I want not the real one.

The approach does NOT emulate Edge.  It masks the user agent.  Emulating Edge by either simply using Edge, an emulator, or create a craft code to send the user agent.  Try using  Dev Tools.