Dear ASP.NET Programmers,
How can I post data to an ASP.NET login page and pass authentication? The
login page uses forms
authentication, users must supply usernames and password and have to click
on a submit button. I
want to automate this process by supplying values with HttpWebRequest and
then download a file on
the site. I think that I cannot invoke the submit button. Pleeeasee help,
thanks in advance
Dim myWebReq As HttpWebRequest
Dim myWebResp As HttpWebResponse
Dim encoding As New System.Text.ASC IIEncoding()
Dim postData As String
Dim data() As Byte
Dim sr As StreamReader
Dim sw As StreamWriter
postData += "txtUsernam e=b"
postData += "&"
postData += "txtPasswor d=k"
data = encoding.GetByt es(postData)
myWebReq =
WebRequest.Crea te("http://burak/database/medicalDocs/F325_fittoflyre port.asp
x")
myWebReq.Method = "POST"
myWebReq.Conten tType = "applicatio n/x-www-form-urlencoded"
myWebReq.Conten tLength = data.Length
Dim myStream As Stream = myWebReq.GetReq uestStream()
myStream.Write( data, 0, data.Length)
myStream.Close( )
myWebResp = myWebReq.GetRes ponse
sr = New StreamReader(my WebResp.GetResp onseStream)
Dim strHTML As String = sr.ReadToEnd
sw = File.CreateText ("d:\Downloads\ 1.htm")
sw.WriteLine(st rHTML)
sw.Close()
Response.WriteF ile("d:\Downloa ds\1.htm")
9  3585 
"buran" <bu***@buran.co m> wrote in message
news:OJ******** ******@TK2MSFTN GP09.phx.gbl... Dear ASP.NET Programmers,
How can I post data to an ASP.NET login page and pass authentication? The
login page uses forms
authentication, users must supply usernames and password and have to click
on a submit button. I
want to automate this process by supplying values with HttpWebRequest and
then download a file on
the site. I think that I cannot invoke the submit button. Pleeeasee help,
thanks in advance
I could swear I answered this question before...
You are attempting to substitute code for a browser. Your code will have to
do what the browser would have done:
1) Browser attempts to reach a protected page, for instance, protected.aspx
2) Forms Authentication sees that the request does not include a Forms
Authentication Ticket in the proper cookie, so the server replies with a
"302 Page Moved" status, and a Location header pointing to the login page.
3) The browser requests the login page specified.
4) The server responds with the login page
5) The user fills in the login page and submits the form, so the browser
POSTs the form back to the login page
6) If the credentials are valid, the server responds with another "302 Page
Moved" status, a Location header pointing to protected.aspx, and a
Set-Cookie header providing the encrypted Forms Authentication Ticket.
7) The browser then requests protected.aspx, but this time supplies the
Forms Authentication Ticket in a Cookie header
8) Forms Authentication sees that the request includes a valid Forms
Authentication Ticket, so it permits the access. The server responds with
the protected page.
This is what your code will need to duplicate.
--
John Saunders
Internet Engineer jo***********@s urfcontrol.com
I am using following code but for no good. Maybe you can help me on this...
On the logindeneme.asp x page
Private Sub btnValidate_Cli ck(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles btnValidate.Cli ck
If FormsAuthentica tion.Authentica te(txtUsername. Text,
txtPassword.Tex t) Then
Dim tkt As FormsAuthentica tionTicket
Dim cookiestr As String
Dim ck As HttpCookie
tkt = New FormsAuthentica tionTicket(txtU sername.Text, False,
120)
cookiestr = FormsAuthentica tion.Encrypt(tk t)
Session.Add("c" , cookiestr)
ck = New HttpCookie(Form sAuthentication .FormsCookieNam e(),
cookiestr)
Response.Cookie s.Add(ck)
Dim strRedirect As String
strRedirect = Request("Return URL")
If strRedirect <> "" Then
Response.Redire ct(strRedirect, True)
Else
strRedirect = "logindeneme.as px"
Response.Redire ct(strRedirect, True)
End If
Else
lblMessage.Text = "Invalid username/password"
End If
End Sub
and then in the page where I am requesting the page to be downloaded..
Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
Dim myWebReq As HttpWebRequest
Dim myWebResp As HttpWebResponse
Dim strHTML As String
Dim c As New Cookie()
Dim sr As StreamReader
Dim sw As StreamWriter
Dim cc As New CookieContainer ()
myWebReq = WebRequest.Crea te("http://burak/LoginDeneme/secret.aspx")
c.Name = FormsAuthentica tion.FormsCooki eName()
c.Value = Session("c")
c.Domain = "http://burak/LoginDeneme"
cc.Add(c)
myWebReq.Cookie Container = cc
myWebResp = myWebReq.GetRes ponse
sr = New StreamReader(my WebResp.GetResp onseStream)
strHTML = sr.ReadToEnd
sw = File.CreateText ("d:\Downloads\ 1.htm")
sw.WriteLine(st rHTML)
sw.Close()
Response.WriteF ile("d:\Downloa ds\1.htm")
End Sub
What am I missing? Thank you very much for your help..
buran
"John Saunders" <jo***********@ surfcontrol.com > wrote in message
news:es******** *****@TK2MSFTNG P12.phx.gbl... "buran" <bu***@buran.co m> wrote in message
news:OJ******** ******@TK2MSFTN GP09.phx.gbl... Dear ASP.NET Programmers,
How can I post data to an ASP.NET login page and pass authentication?
The login page uses forms
authentication, users must supply usernames and password and have to
click on a submit button. I
want to automate this process by supplying values with HttpWebRequest
and then download a file on
the site. I think that I cannot invoke the submit button. Pleeeasee
help, thanks in advance
I could swear I answered this question before...
You are attempting to substitute code for a browser. Your code will have
to do what the browser would have done:
1) Browser attempts to reach a protected page, for instance,
protected.aspx 2) Forms Authentication sees that the request does not include a Forms
Authentication Ticket in the proper cookie, so the server replies with a
"302 Page Moved" status, and a Location header pointing to the login page.
3) The browser requests the login page specified.
4) The server responds with the login page
5) The user fills in the login page and submits the form, so the browser
POSTs the form back to the login page
6) If the credentials are valid, the server responds with another "302
Page Moved" status, a Location header pointing to protected.aspx, and a
Set-Cookie header providing the encrypted Forms Authentication Ticket.
7) The browser then requests protected.aspx, but this time supplies the
Forms Authentication Ticket in a Cookie header
8) Forms Authentication sees that the request includes a valid Forms
Authentication Ticket, so it permits the access. The server responds with
the protected page.
This is what your code will need to duplicate.
--
John Saunders
Internet Engineer
jo***********@s urfcontrol.com
I am using following code but for no good. Maybe you can help me on this...
On the logindeneme.asp x page
Private Sub btnValidate_Cli ck(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles btnValidate.Cli ck
If FormsAuthentica tion.Authentica te(txtUsername. Text,
txtPassword.Tex t) Then
Dim tkt As FormsAuthentica tionTicket
Dim cookiestr As String
Dim ck As HttpCookie
tkt = New FormsAuthentica tionTicket(txtU sername.Text, False,
120)
cookiestr = FormsAuthentica tion.Encrypt(tk t)
Session.Add("c" , cookiestr)
ck = New HttpCookie(Form sAuthentication .FormsCookieNam e(),
cookiestr)
Response.Cookie s.Add(ck)
Dim strRedirect As String
strRedirect = Request("Return URL")
If strRedirect <> "" Then
Response.Redire ct(strRedirect, True)
Else
strRedirect = "logindeneme.as px"
Response.Redire ct(strRedirect, True)
End If
Else
lblMessage.Text = "Invalid username/password"
End If
End Sub
and then in the page where I am requesting the page to be downloaded..
Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
Dim myWebReq As HttpWebRequest
Dim myWebResp As HttpWebResponse
Dim strHTML As String
Dim c As New Cookie()
Dim sr As StreamReader
Dim sw As StreamWriter
Dim cc As New CookieContainer ()
myWebReq = WebRequest.Crea te("http://burak/LoginDeneme/secret.aspx")
c.Name = FormsAuthentica tion.FormsCooki eName()
c.Value = Session("c")
c.Domain = "http://burak/LoginDeneme"
cc.Add(c)
myWebReq.Cookie Container = cc
myWebResp = myWebReq.GetRes ponse
sr = New StreamReader(my WebResp.GetResp onseStream)
strHTML = sr.ReadToEnd
sw = File.CreateText ("d:\Downloads\ 1.htm")
sw.WriteLine(st rHTML)
sw.Close()
Response.WriteF ile("d:\Downloa ds\1.htm")
End Sub
What am I missing? Thank you very much for your help..
buran
"John Saunders" <jo***********@ surfcontrol.com > wrote in message
news:es******** *****@TK2MSFTNG P12.phx.gbl... "buran" <bu***@buran.co m> wrote in message
news:OJ******** ******@TK2MSFTN GP09.phx.gbl... Dear ASP.NET Programmers,
How can I post data to an ASP.NET login page and pass authentication?
The login page uses forms
authentication, users must supply usernames and password and have to
click on a submit button. I
want to automate this process by supplying values with HttpWebRequest
and then download a file on
the site. I think that I cannot invoke the submit button. Pleeeasee
help, thanks in advance
I could swear I answered this question before...
You are attempting to substitute code for a browser. Your code will have
to do what the browser would have done:
1) Browser attempts to reach a protected page, for instance,
protected.aspx 2) Forms Authentication sees that the request does not include a Forms
Authentication Ticket in the proper cookie, so the server replies with a
"302 Page Moved" status, and a Location header pointing to the login page.
3) The browser requests the login page specified.
4) The server responds with the login page
5) The user fills in the login page and submits the form, so the browser
POSTs the form back to the login page
6) If the credentials are valid, the server responds with another "302
Page Moved" status, a Location header pointing to protected.aspx, and a
Set-Cookie header providing the encrypted Forms Authentication Ticket.
7) The browser then requests protected.aspx, but this time supplies the
Forms Authentication Ticket in a Cookie header
8) Forms Authentication sees that the request includes a valid Forms
Authentication Ticket, so it permits the access. The server responds with
the protected page.
This is what your code will need to duplicate.
--
John Saunders
Internet Engineer
jo***********@s urfcontrol.com
"buran" <bu***@buran.co m> wrote in message
news:e7******** ******@TK2MSFTN GP11.phx.gbl... I am using following code but for no good. Maybe you can help me on
this...
Please tell us what you mean when you say "but for no good". What is the
specific problem? Perhaps an exception is thrown? Perhaps there is a
timeout? Please be more specific.
.... and then in the page where I am requesting the page to be downloaded..
Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
myWebReq =
WebRequest.Crea te("http://burak/LoginDeneme/secret.aspx") c.Name = FormsAuthentica tion.FormsCooki eName()
c.Value = Session("c")
c.Domain = "http://burak/LoginDeneme"
cc.Add(c) http://burak/LoginDeneme is not a domain. "burak" is a domain. Please try
that, and if it doesn't work, let us know in detail what the result is.
--
John Saunders
Internet Engineer jo***********@s urfcontrol.com
"John Saunders" <jo***********@ surfcontrol.com > wrote in message
news:O1******** ******@tk2msftn gp13.phx.gbl... "buran" <bu***@buran.co m> wrote in message
news:e7******** ******@TK2MSFTN GP11.phx.gbl... I am using following code but for no good. Maybe you can help me on this...
Please tell us what you mean when you say "but for no good". What is the
specific problem? Perhaps an exception is thrown? Perhaps there is a
timeout? Please be more specific.
Ok you're right. I am getting the login page
(http://burak/LoginDeneme/LoginDeneme.aspx) on the browser instead of the
the http://burak/LoginDeneme/al.aspx.
So the code writes the contents of the login page to the disk
(d:\Downloads\1 .htm). It cannot pass the authentication.
Yeesss, changing to c.Domain = "burak" worked. Thank you very very much..
:))
... and then in the page where I am requesting the page to be downloaded..
Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
myWebReq = WebRequest.Crea te("http://burak/LoginDeneme/secret.aspx") c.Name = FormsAuthentica tion.FormsCooki eName()
c.Value = Session("c")
c.Domain = "http://burak/LoginDeneme"
cc.Add(c)
http://burak/LoginDeneme is not a domain. "burak" is a domain. Please try
that, and if it doesn't work, let us know in detail what the result is.
--
John Saunders
Internet Engineer
jo***********@s urfcontrol.com
"John Saunders" <jo***********@ surfcontrol.com > wrote in message news:<es******* ******@TK2MSFTN GP12.phx.gbl>.. . "buran" <bu***@buran.co m> wrote in message
news:OJ******** ******@TK2MSFTN GP09.phx.gbl...
I could swear I answered this question before...
You are attempting to substitute code for a browser. Your code will have to
do what the browser would have done:
1) Browser attempts to reach a protected page, for instance, protected.aspx
2) Forms Authentication sees that the request does not include a Forms
Authentication Ticket in the proper cookie, so the server replies with a
"302 Page Moved" status, and a Location header pointing to the login page.
3) The browser requests the login page specified.
4) The server responds with the login page
5) The user fills in the login page and submits the form, so the browser
POSTs the form back to the login page
6) If the credentials are valid, the server responds with another "302 Page
Moved" status, a Location header pointing to protected.aspx, and a
Set-Cookie header providing the encrypted Forms Authentication Ticket.
7) The browser then requests protected.aspx, but this time supplies the
Forms Authentication Ticket in a Cookie header
8) Forms Authentication sees that the request includes a valid Forms
Authentication Ticket, so it permits the access. The server responds with
the protected page.
This is what your code will need to duplicate.
Okay, I understand the steps.... but I have been unable to perform
them.
When I try to post my userid and password to my login.aspx page, I
keep getting the html for the login page back. I assume that this is
because I do nto successfully login. There are only 3 fields on the
login page __viewstate, userid, and password. The login screen is
using "forms" authentication.
I have scoured the web looking for a simple example of this type of
login, but have not been successful.
Once logged in, I realize that I need to grab the auth cookie and use
it on future requests of pages.
I am really surprised that I can not find an example of this. Is it so
simple that everyone else is able to do it without problems.... or am
I missing something.
Please help.
Thanks.
"Jim J" <do**********@h otmail.com> wrote in message
news:a0******** *************** ***@posting.goo gle.com... "John Saunders" <jo***********@ surfcontrol.com > wrote in message
news:<es******* ******@TK2MSFTN GP12.phx.gbl>.. . "buran" <bu***@buran.co m> wrote in message
news:OJ******** ******@TK2MSFTN GP09.phx.gbl...
I could swear I answered this question before...
You are attempting to substitute code for a browser. Your code will have
to do what the browser would have done:
1) Browser attempts to reach a protected page, for instance,
protected.aspx 2) Forms Authentication sees that the request does not include a Forms
Authentication Ticket in the proper cookie, so the server replies with a
"302 Page Moved" status, and a Location header pointing to the login
page. 3) The browser requests the login page specified.
4) The server responds with the login page
5) The user fills in the login page and submits the form, so the browser
POSTs the form back to the login page
6) If the credentials are valid, the server responds with another "302
Page Moved" status, a Location header pointing to protected.aspx, and a
Set-Cookie header providing the encrypted Forms Authentication Ticket.
7) The browser then requests protected.aspx, but this time supplies the
Forms Authentication Ticket in a Cookie header
8) Forms Authentication sees that the request includes a valid Forms
Authentication Ticket, so it permits the access. The server responds
with the protected page.
This is what your code will need to duplicate.
Okay, I understand the steps.... but I have been unable to perform
them.
When I try to post my userid and password to my login.aspx page, I
keep getting the html for the login page back. I assume that this is
because I do nto successfully login.
Jim, you know what they say about assumptions...
What happens if you assume that your assumption is incorrect, since that
seems to be the case?
--
John Saunders
Internet Engineer jo***********@s urfcontrol.com
"John Saunders" <jo***********@ surfcontrol.com > wrote in message news:<es******* ******@TK2MSFTN GP12.phx.gbl>.. . "buran" <bu***@buran.co m> wrote in message
news:OJ******** ******@TK2MSFTN GP09.phx.gbl...
I could swear I answered this question before...
You are attempting to substitute code for a browser. Your code will have to
do what the browser would have done:
1) Browser attempts to reach a protected page, for instance, protected.aspx
2) Forms Authentication sees that the request does not include a Forms
Authentication Ticket in the proper cookie, so the server replies with a
"302 Page Moved" status, and a Location header pointing to the login page.
3) The browser requests the login page specified.
4) The server responds with the login page
5) The user fills in the login page and submits the form, so the browser
POSTs the form back to the login page
6) If the credentials are valid, the server responds with another "302 Page
Moved" status, a Location header pointing to protected.aspx, and a
Set-Cookie header providing the encrypted Forms Authentication Ticket.
7) The browser then requests protected.aspx, but this time supplies the
Forms Authentication Ticket in a Cookie header
8) Forms Authentication sees that the request includes a valid Forms
Authentication Ticket, so it permits the access. The server responds with
the protected page.
This is what your code will need to duplicate.
Okay, I understand the steps.... but I have been unable to perform
them.
When I try to post my userid and password to my login.aspx page, I
keep getting the html for the login page back. I assume that this is
because I do nto successfully login. There are only 3 fields on the
login page __viewstate, userid, and password. The login screen is
using "forms" authentication.
I have scoured the web looking for a simple example of this type of
login, but have not been successful.
Once logged in, I realize that I need to grab the auth cookie and use
it on future requests of pages.
I am really surprised that I can not find an example of this. Is it so
simple that everyone else is able to do it without problems.... or am
I missing something.
Please help.
Thanks.
"Jim J" <do**********@h otmail.com> wrote in message
news:a0******** *************** ***@posting.goo gle.com... "John Saunders" <jo***********@ surfcontrol.com > wrote in message
news:<es******* ******@TK2MSFTN GP12.phx.gbl>.. . "buran" <bu***@buran.co m> wrote in message
news:OJ******** ******@TK2MSFTN GP09.phx.gbl...
I could swear I answered this question before...
You are attempting to substitute code for a browser. Your code will have
to do what the browser would have done:
1) Browser attempts to reach a protected page, for instance,
protected.aspx 2) Forms Authentication sees that the request does not include a Forms
Authentication Ticket in the proper cookie, so the server replies with a
"302 Page Moved" status, and a Location header pointing to the login
page. 3) The browser requests the login page specified.
4) The server responds with the login page
5) The user fills in the login page and submits the form, so the browser
POSTs the form back to the login page
6) If the credentials are valid, the server responds with another "302
Page Moved" status, a Location header pointing to protected.aspx, and a
Set-Cookie header providing the encrypted Forms Authentication Ticket.
7) The browser then requests protected.aspx, but this time supplies the
Forms Authentication Ticket in a Cookie header
8) Forms Authentication sees that the request includes a valid Forms
Authentication Ticket, so it permits the access. The server responds
with the protected page.
This is what your code will need to duplicate.
Okay, I understand the steps.... but I have been unable to perform
them.
When I try to post my userid and password to my login.aspx page, I
keep getting the html for the login page back. I assume that this is
because I do nto successfully login.
Jim, you know what they say about assumptions...
What happens if you assume that your assumption is incorrect, since that
seems to be the case?
--
John Saunders
Internet Engineer jo***********@s urfcontrol.com This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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Dear ASP.NET Programmers,
How can I post data to an ASP.NET login page and pass authentication? The
login page uses forms
authentication, users must supply usernames and password and have to click
on a submit button. I
want to automate this process by supplying values with HttpWebRequest and
then download a file on
the site. I think that I cannot invoke the submit button. Pleeeasee help,
thanks in advance
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last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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