Request.Cookies and Response.Cookies

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1.00/5 (1 vote)

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I am trying to do this tutorial:
Cookies in ASP.NET[^]

I have 2 problems there: Request.Cookies and Response.Cookies
The Request and Response classes are not visible in my code. WHY?
What should i do?

I read : "that is all about the ASP.NET cookies."
I am using WindowsFormsApplication. I should use something else?
It is not Possible to create this things in WindowsFormsApplication?
Whaaaayyyyy?
Thanks.

what i want with this app:
I want to make a easy to find software for my artists that I watch(and I have 3 pages with users,approx 200) on deviantart.com. I load every name in a list, and from that list I select each artist, and his paintings images are shown + some information about the guy.

Posted 20-Mar-15 1:04am

_Q12_

Updated 20-Mar-15 18:18pm

v4

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Joan Magnet 20-Mar-15 7:10am

Cookies are used by your web browser to store temporary or permanent data. Is your winform app acting as a web browser?

_Q12_ 20-Mar-15 7:16am

my app, is gathering data from a website, - images and some text info.
It is not a web browser. I want to be able to login to the website, to check the "mature option" -its about art stuff- deviantart.com is the website.

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F-ES Sitecore · Answer 1 · 2015-03-20T01:10:00

Solution 1

Cookies are part of the http protocol for websites, they are not available from your windows forms app as the Request\Response objects are provided by the asp.net framework which allows your code to run inside the context of a web request. Your form is just an EXE running on the desktop.

Here is an example of how you can persists cookies yourself using WebClient. This code will allow the target site to know we are a return vististor, and any cookie-based authentication or session ids will persist between requests as well.

First off a sample page to call. This sets a cookie containing the current time if no such cookie has been set. It also shows the value of the cookie in the output. View this page in the browser and it'll have the current time. Keep refreshing and the time doesn't change.

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CookieTest.aspx.cs" Inherits="WebApplication1.CookieTest" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <%= Request.Cookies["TestCookie"] == null ? "" : Request.Cookies["TestCookie"].Value %>
    </div>
    </form>
</body>
</html>

C#

public partial class CookieTest : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // This page sets a cookie that has the current time if no such cookie previously exists
        // the effect of this is that the time will reflect the first time you view the page
        // all subsequent requests will show the same time as that time is being read from the
        // stored cookie

        if (Request.Cookies["TestCookie"] == null)
        {
            Response.Cookies.Add(new HttpCookie("TestCookie", DateTime.Now.ToString()));
        }
    }
}

I'm going to do the sample client as a console app, but the code will work for your winforms app too.

public class CookieAwareWebClient : WebClient
{
    public readonly CookieContainer m_container = new CookieContainer();

    protected override WebRequest GetWebRequest(Uri address)
    {
        WebRequest request = base.GetWebRequest(address);
        HttpWebRequest webRequest = request as HttpWebRequest;
        if (webRequest != null)
        {
            webRequest.CookieContainer = m_container;
        }
        return request;
    }
}

class Program
{

    static void Main(string[] args)
    {
        //
        // First we make two requests using the standard WebClient
        // This doesn't support cookies so every request is new
        // the page we're requesting doesn't know we have requested it previously
        // so the time will change with every request
        //

        WebClient clientA = new WebClient();

        StreamReader r = new StreamReader(clientA.OpenRead("http://localhost:59466/CookieTest.aspx"));
        string html = r.ReadToEnd();

        Console.WriteLine("**** REQUEST 1 USING WEBCLIENT ****");
        // the html will contain the current time
        Console.WriteLine(html);

        System.Threading.Thread.Sleep(2000);

        r = new StreamReader(clientA.OpenRead("http://localhost:59466/CookieTest.aspx"));
        html = r.ReadToEnd();

        Console.WriteLine("**** REQUEST 2 USING WEBCLIENT ****");
        // the html will contain the current time
        Console.WriteLine(html);

        System.Threading.Thread.Sleep(2000);

        //
        // Now we make two requests using the custom WebClient
        // This does support cookies so every request re-sends any cookies previously returned
        // the page we're requesting now knows we have requested it previously
        // so subsequent requests will all show the same time as the first request
        //

        CookieAwareWebClient clientB = new CookieAwareWebClient();
        r = new StreamReader(clientB.OpenRead("http://localhost:59466/CookieTest.aspx"));
        html = r.ReadToEnd();

        Console.WriteLine("**** REQUEST 1 USING CUSTOMWEBCLIENT ****");
        // the html will contain the current time
        Console.WriteLine(html);

        System.Threading.Thread.Sleep(2000);

        r = new StreamReader(clientB.OpenRead("http://localhost:59466/CookieTest.aspx"));
        html = r.ReadToEnd();

        Console.WriteLine("**** REQUEST 2 USING CUSTOMWEBCLIENT ****");
        // the html will contain the same time as in the previous example
        Console.WriteLine(html);

        Console.ReadKey();

    }
}

Posted 20-Mar-15 1:10am

F-ES Sitecore

Updated 20-Mar-15 2:26am

v2

Comments

_Q12_ 20-Mar-15 7:17am

my app, is gathering data from a website, - images and some text info.
It is not a web browser. I want to be able to login to the website, to check the "mature option" -its about art stuff- deviantart.com is the website.

F-ES Sitecore 20-Mar-15 7:24am

If your app is acting like a browser then it will need to keep the cookies sent in the response from the website, and re-send those cookies every time you make subsequent requests. How you do this depends on what you're using to make the requests, but if you look into CookieContainer objects it might help

https://msdn.microsoft.com/en-gb/library/dd920298(v=vs.95).aspx

http://stackoverflow.com/questions/1777221/using-cookiecontainer-with-webclient-class

Or you can just do it basic....read the cookies from the header, store as text, and just include those cookies via the header when you next make a request. Classes like WebClient, WebRequest etc let you supply your own headers.

_Q12_ 20-Mar-15 7:45am

really this is new for me- can you give me an inspiration, about how to do it basic? I like it more like that.
thanks

[no name] 20-Mar-15 8:07am

Hey, there you are again :)
Take a look here: https://msdn.microsoft.com/en-us/library/dd920298%28v=vs.95%29.aspx
Recall you already have the required cookie (if you found it in your browsers cookie cache) so you only have to take care about sending it, not receiving any.

_Q12_ 21-Mar-15 4:42am

what language are you using?
c# winforms? c# asp.net? what?
I am using c# winforms !!!!!! -that is the reason that i can not run it properly. Cookies are not for winapp... this is the sad truth.

F-ES Sitecore 20-Mar-15 8:26am

I've added an example to my solution

_Q12_ 20-Mar-15 8:50am

manchanx> in tutorial send by you:
the first line of code is my problem!
<pre>request.CookieContainer = new CookieContainer();</pre>
The Request and Response classes are not visible in my code !!!

_Q12_ 20-Mar-15 8:57am

F-ES Sitecore>
I read your updated response. Your code is very complicated. I understand what you wrote, but still i dont get what it does... I will apply it in my code, but is very out of the context... or I dont get it because everything is so new to me.
Can you make something more simpler and more direct,please?
Also, can you explain, where on my hdd is that cookie located? The root of it? like c:\etc..?

F-ES Sitecore 20-Mar-15 9:07am

It's lacking context because you didn't supply any :) it's hard to code for your situation when we don't know what the situation is. All you really need from my code is the class I defined (CookieAwareWebClient) and the first code section that uses it, the rest was just a demo of the custom class vs the standard class.

As for cookies on your drive, "it depends". Different browsers store them in different places, and in different ways. If you are automating this process via code then you have to handle cookies yourself, there is no browser to do it so where browsers store cookies is irrelevant...this solution doesn't store them anywhere, they are simply held in memory which is fine. If you're actually trying to automate a browser then none of this code applies. As I said you haven't given us enough details about what you're doing and how you plan on doing it to give a specific solution.

_Q12_ 20-Mar-15 9:31am

thanks F-ES Sitecore> for adding more detail. Now I understand better what your code is. I totally missed your "custom cookie reader".
I transformed your code into my winapp code:
<pre>
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
label2.Text = "";
CookieAwareWebClient clientB = new CookieAwareWebClient();
StreamReader r = new StreamReader(clientB.OpenRead("http://localhost:59466/CookieTest.aspx"));
string html = r.ReadToEnd();

label2.Text += "**** REQUEST 1 USING CUSTOMWEBCLIENT ****";
// the html will contain the current time
label2.Text += html;

System.Threading.Thread.Sleep(2000);//why Sleep for 2s?

r = new StreamReader(clientB.OpenRead("http://localhost:59466/CookieTest.aspx"));
html = r.ReadToEnd();

label2.Text += "**** REQUEST 2 USING CUSTOMWEBCLIENT ****";
// the html will contain the same time as in the previous example
label2.Text += html;
}
</pre>
I get the error on executing the program, at ("http://localhost:59466/CookieTest.aspx") - what should i put here? I know is stupid what i ask, but this is how they build the pyramids.

F-ES Sitecore 20-Mar-15 9:42am

You put the url of the page you're trying to read, so "http://www.google.com" or whatever. That was the address of my test program that exists on my machine but not yours.

_Q12_ 20-Mar-15 9:45am

The remote server returned an error: (403) Forbidden.
for:
StreamReader r = new StreamReader(clientB.OpenRead("http://www.deviantart.com"));

F-ES Sitecore 20-Mar-15 9:59am

You're going to have to fool it into thinking you're a proper browser and not someone just looking to scrape their content ;)

CookieAwareWebClient client = new CookieAwareWebClient();
client.Headers.Add(HttpRequestHeader.Accept, "text/html, */*");
client.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko");

StreamReader r = new StreamReader(client.OpenRead("http://www.deviantart.com"));
string html = r.ReadToEnd();

_Q12_ 20-Mar-15 10:27am

still, "The remote server returned an error: (403) Forbidden."

F-ES Sitecore 20-Mar-15 10:35am

Not sure what to suggest, it works ok for me. Use a tool like Fiddler to examine how the request from code differs from the request from the browser and add any headers that are missing.

_Q12_ 20-Mar-15 10:37am

i have give you 5stars because you stick with me, but i will accept it when i see something running.

F-ES Sitecore 20-Mar-15 10:41am

See my reply to your post where you posted your code, now I see the code I know what the problem is, try my revised copy.

_Q12_ 21-Mar-15 4:39am

what language are you using?
c# winforms? c# asp.net? what?
I am using c# winforms !!!!!! -that is the reason that i can not run it properly.

_Q12_ 20-Mar-15 9:35am

+ the actual class that i didn't mess with, just paste it somewhere in the code:
public class CookieAwareWebClient : WebClient { ...etc,the good stuff }

_Q12_ 20-Mar-15 9:54am

I updated my original post(the top one) and I put there what i want with this app.

_Q12_ 20-Mar-15 10:33am

until now all i have is this: pretty basic stuff:
one button and one label for text.

protected override WebRequest GetWebRequest(Uri address)
{
WebRequest request = base.GetWebRequest(address);
HttpWebRequest webRequest = request as HttpWebRequest;
if (webRequest != null)
{
webRequest.CookieContainer = m_container;
}
return request;
}
}

private void button3_Click(object sender, EventArgs e)
{
CookieAwareWebClient client = new CookieAwareWebClient();
client.Headers.Add(HttpRequestHeader.Accept, "text/html, */*");
client.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko");

label2.Text = "";
CookieAwareWebClient clientB = new CookieAwareWebClient();
StreamReader r = new StreamReader(clientB.OpenRead("http://www.deviantart.com"));
string html = r.ReadToEnd();

label2.Text += "**** REQUEST 1 USING CUSTOMWEBCLIENT ****";
// the html will contain the current time
label2.Text += html;

System.Threading.Thread.Sleep(2000);//why Sleep for 2s?

r = new StreamReader(clientB.OpenRead("http://www.deviantart.com"));
html = r.ReadToEnd();

label2.Text += "**** REQUEST 2 USING CUSTOMWEBCLIENT ****";
// the html will contain the same time as in the previous example
label2.Text += html;
}

F-ES Sitecore 20-Mar-15 10:37am

You're setting the headers on one client but making the request with another

This is all your click event needs

private void button3_Click(object sender, EventArgs e)
{
CookieAwareWebClient client = new CookieAwareWebClient();
client.Headers.Add(HttpRequestHeader.Accept, "text/html, */*");
client.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko");

label2.Text = "";

StreamReader r = new StreamReader(client.OpenRead("http://www.deviantart.com"));
string html = r.ReadToEnd();

label2.Text += html;

}

_Q12_ 20-Mar-15 12:37pm

ok - this is working now.
Now what? Where is the actual cookie? Where is the information that i must to manipulate?
But reducing everything to it's core, that is very good. I am still looking and wondering, but I am in good hands. :)

this is how my code is looking now:
--------------------------------
string html = "";
CookieAwareWebClient client;
StreamReader r;
private void button3_Click(object sender, EventArgs e)
{
client = new CookieAwareWebClient();
client.Headers.Add(HttpRequestHeader.Accept, "text/html, */*");
client.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko");

TextBox2.Text = "";

r = new StreamReader(client.OpenRead("http://www.deviantart.com"));
string html = r.ReadToEnd();

TextBox2.Text += html;
}
---------------------------------

F-ES Sitecore 21-Mar-15 7:30am

The cookie data is held in the CookieCollection class. If you're looking to login chances are you'll need to submit the login form of the site, that will give you an auth cookie that will stay in the cookiecollection and each time you request a page it will do it as your logged in user.

_Q12_ · Answer 2 · 2015-03-20T20:58:00

Solution 2

WHAT SHOULD I [ADD] IN MY CODE TO MAKE VISIBLE THE Request and Response CLASSES?
These classes ARE NOT VISIBLEEeeeeeeeeeeeeeeeeeeeee!!!!!
I can not find what is the probleeeeeeeeem...
please heelp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Posted 20-Mar-15 20:58pm

_Q12_

v2

Comments

_Q12_ 21-Mar-15 3:03am

Now you are using .NET Framework 4.
maybe is a .NET problem -try using a Framework 3.5 .