.net - Force HttpWebRequest To Use Cache In Asp Environment?
May 13, 2010
In my ASP.NET app I use HttpWebRequest for fetching external resources which I'd like to be cached. Consider the following code:
var req = WebRequest.Create("http://google.com/");
req.CachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.CacheIfAvailable);
var resp = req.GetResponse();
Console.WriteLine(resp.IsFromCache);
var answ = (new StreamReader(resp.GetResponseStream())).ReadToEnd();
Console.WriteLine(answ.Length);
HttpWebRequest uses IE cache, so when I run it as normal user (in tiny cmd test app), data is cached to %userprofile%Local SettingsTemporary Internet Files and next responses are read from cache.
I thought that when such code is run inside ASP.NET app, data will be cached to ...ASPNETLocal SettingsTemporary Internet Files but it is not and cache is never used.
What I am doing wrong? How to force HttpWebRequest to use cache in ASP.NET environment?
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protected void Page_Load(object sender, EventArgs e)
{
if (this.CheckCredentials())
{
string data = this.Context.Request.Form.ToString();
}
}
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{
string userName = User.Identity.Name;
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if (certificate.IsPresent)
{
string w = certificate.Get("SUBJECT 0");
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}
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}
There is never a certificate present.
I found this earlier post X509Certificate not getting transmitted to the server
But did not understand the answer. I created a certificate using the MakeCert.exe utility but I do not really understand why it does not work.
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public XPathNavigator GSASearch(string url, string searchString)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + searchString);
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request.Credentials = CredentialCache.DefaultCredentials;
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EDIT: I feel I should explain a bit more what I am attempting to do. I have been tasked with providing a new interface for my company's Google Search Appliance. I am using an ASP.NET page, which does some things like choose a Collection depending on where a user is located, etc. and then sends the appropriate search string the the GSA. This was all working well until they decided to turn authentication on, and now I can't get any results (I either get a 401 unauthorized, or a message stating that 'Data at the root level is invalid'). If I take the search string and provide it directly to the GSA, it authenticates fine, and displays the results, I just can't seem to get it through the HttpWebRequest.
EDIT 2: I did a little more looking (ran the request through Fiddler) and it looks like the request is only attempting Negotiate and not Kerberos. I set the credentials to use Kerberos explicitly as below, but it didn't help...
public XPathNavigator GSASearch(string url, string searchString)
{
CredentialCache credCache = new CredentialCache();
credCache.Add(new Uri(url), "Kerberos", CredentialCache.DefaultNetworkCredentials);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + searchString);
request.CookieContainer = new CookieContainer();
request.PreAuthenticate = true;
request.Credentials = credCache;
request.ContentType = "text/xml";
request.Method = "POST";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream receiveStream = response.GetResponseStream();
//StreamReader readStream = new StreamReader(receiveStream);
XPathDocument doc = new XPathDocument(receiveStream);
return doc.CreateNavigator();
}
EDIT 3: Ok, looking closer again, the CredentialCache.DefaultCredentials doesn't appear to have my network credentials in it...
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StringBuilder sb = new StringBuilder();
[Code]....
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I am trying to automate a few things in wordpress blog, using HttpWebrequest.i have tried to get the login page "http://mywebsite.net/wp-admin"and then try to post with login data on page "http://www.mywebsite.net/wp-login.php"data = "log=admin&pwd=mypassword&wp-submit=Log+In&redirect_to=http%3A%2F%2Fmywebsite.net%2Fwp-admin%2F&testcookie=1"i am not able to login, wat i have discovered is that when using browser the cookies are sent to the server, but using HttpWebrequest the cookies are not sent on post, i am configured a cookiecontainer for the httpwebrequest and works fine other wise,.. and also on "post" the request host also changes to "www.mywebsite.net" and on "get" request it is "mywebsite.net"
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