Applies to: Microsoft FrontPage 2000, Microsoft Access 2000, IIS 5.0
Operating System: Microsoft Windows 2000 Professional
I am trying to protect a portion of a web site by allowing users to register a username and password & then login with those details, but so far I am having only marginal success. I am far from an expert on ASP programming, indeed the code I am using comes from "Sams Teach Yourself E-Commerce Programming with ASP" but it is ideally suited for my purpose.
In short, there are 3 .asp pages (register.asp, login.asp & checkpassword.a sp - the code for each is below), a global.asa file was automatically created and by following the instructions in the book, I also created a small Access database called UserDB.mdb, which stores the username & password of each user when they register & also verify's those details when the user attempts to login again.
The DNS connection has been setup within FrontPage and I have verified that this connection works by clicking "Tools", "Web Settings" & the "Database" tab, highlighting the DNS connection & clicking Verify.
The problems seem to occur when I try to register a new username & password, for some strange reason the details I enter are not being saved in the database table, and to compound the problem further, if I register just a username, or a password but not both, the page simply refreshes itself with empty boxes instead of giving an error message to indicate that a "username" or "password" must be entered, which if I have read the code correctly on the "checkpassword. asp" page, should happen.
To further confuse the situation, if I manually enter a username & password into the database table and then attempt to click a hyperlink taking me to a "test.asp" page, with the INCLUDE FILE: <!-- #INCLUDE FILE="checkpass word.asp" -->, I am automatically taken to the login.asp, where if I enter the username & password that I manually put into the database table, it takes me to the selected "Protected" web page. In my mind that clearly shows the DNS connection is working but yet it won't store new registered details into the database table, which is extremely confusing.
If anyone can see what I may be doing wrong, or point me in the right direction, your help & advice will be greatly appreciated. As I pointed out earlier I am far from an expert, so any help you can give would be ideally suited towards a newbie mentality.
Below is the code for the three .asp pages:
Many thanks in advance
Wayne Smith
register.asp
<%
nextPage = Request( "nextPage" )
newUsername = Request( "newUsernam e" )
newPassword = Request( "newPasswor d" )
%>
<HTML>
<HEAD><TITLE>Re gister"</TITLE></HEAD>
<BODY>
Register at this Web site by selecting a username and password:
<FORM METHOD="post" ACTION="<%=next Page%>">
<INPUT NAME="newUser" TYPE="hidden" VALUE="1">
<P><B>USERNAME: </B>
<INPUT NAME="newUserna me" SIZE=20 MAXLENGTH="20"
VALUE="<%=Serve r.HTMLEncode( newUsername )%>">
<P><B>PASSWORD: </B>
<INPUT NAME="newPasswo rd" SIZE=20 MAXLENGTH="20"
VALUE="<%=Serve r.HTMLEncode( newPassword )%>">
<P><INPUT TYPE="submit" VALUE="Register !">
</FORM>
</BODY>
</HTML>
----------------------------------------------------------------------------------
login.asp
<HTML>
<HEAD><TITLE>Lo gin</TITLE></HEAD>
<BODY>
<%=loginMessage %>
<FORM METHOD="post" ACTION="<%=next Page%>">
<P><B>USERNAME: </B>
<INPUT NAME="username" SIZE=20 MAXLENGTH="20"
VALUE="<%=Serve r.HTMLEncode( username )%>">
<P><B>PASSWORD: </B>
<INPUT NAME="password" SIZE=20 MAXLENGTH="20"
VALUE="<%=Serve r.HTMLEncode( password )%>">
<p><INPUT NAME="addCookie " TYPE="Checkbox" VALUE="1"> Remember me with a cookie
<P><INPUT TYPE="submit" VALUE="Login">
</FORM>
<p>
<a href="register. asp?nextpage=<% Server.URLEncod e( nextpage )%>">
Click here to register</a>
</BODY>
</HTML>
-------------------------------------------------------------
checkpassword.a sp
<%
CONST useSession = TRUE
' Retrieve Form Variables
username = TRIM( Request( "username" ) )
password = TRIM( Request( "password" ) )
newUser = TRIM( Request( "newUser" ) )
newUsername = TRIM( Request( "newUsernam e" ) )
newPassword = TRIM( Request( "newPasswor d" ) )
addCookie = TRIM( Request( "addCookie" ) )
' Retrieve Current Page
nextPage = Request.ServerV ariables( "SCRIPT_NAM E" )
' Ready Database Connection
Set Con = Server.CreateOb ject( "ADODB.Connecti on" )
Con.Open "userDNS"
' Add New User
IF newUser <> "" THEN
IF newUsername = "" THEN
showError "You must enter a username"
END IF
IF newPassword = "" THEN
showError "You must enter a password"
END IF
IF usernameTaken( newUsername ) THEN
showError "The username you entered has already " &_
"been chosen by a previous user. Please select " &_
"a new username"
END IF
sqlString = "INSERT INTO userlist ( user_username, user_password ) " &_
"VALUES ('" & newUsername & "','" & newPassword & "')"
Con.Execute sqlString
username = newUsername
password = newPassword
IF useSession THEN Session( "loggedIn" ) = "Yes"
END IF
' Authenticate User
IF Session( "loggedIn" ) = "" THEN
IF username = "" OR password = "" THEN
loginMessage = "You must login before you can view this page."
showLogin
END IF
result = validateLogin( username, password )
IF result = 1 THEN
loginMessage = "You entered an unregistered username."
showLogin
END IF
IF result = 2 THEN
loginMessage = "You did not enter a valid password."
showLogin
END IF
IF useSession THEN Session( "loggedIn" ) = "Yes"
END IF
' Add a Cookie
IF addCookie <> "" THEN
Response.Cookie s( "username" ) = username
Response.Cookie s( "username" ).Expires = "12/25/2037"
Response.Cookie s( "password" ) = password
Response.Cookie s( "password" ).Expires = "12/25/2037"
END IF
' Create Security Query String Variable
sq = "username=" & Server.HTMLEnco de( username ) & "&"
sq = sq & "password=" & Server.HTMLEnco de( password )
' Create Security Form Variable
sf = "<input name=""username "" type=""hidden"" "
sf = sf & "value=""" & Server.HTMLEnco de( username ) & """>"
sf = sf & "<input name=""password "" type=""hidden"" "
sf = sf & "value=""" & Server.HTMLEnco de( password ) & """>"
' Check Username and Password
FUNCTION validateLogin( theUsername, thePassword )
sqlString = "SELECT user_password FROM userlist " &_
"WHERE user_username=' " & fixQuotes( username ) & "'"
Set RS = Con.Execute( sqlString )
IF RS.EOF THEN
validateLogin = 1
ELSE
IF RS( "user_passw ord" ) <> thePassword THEN
validateLogin = 2
ELSE
validateLogin = 0
END IF
END IF
END FUNCTION
' Check Whether Username Already Taken
FUNCTION usernameTaken( theUsername )
sqlString = "SELECT user_id FROM userlist " &_
"WHERE user_username=' " & fixQuotes( theUsername ) & "'"
Set RS = Con.Execute( sqlString )
IF RS.EOF THEN
usernameTaken = FALSE
ELSE
usernameTaken = TRUE
END IF
RS.Close
Set RS = Nothing
END FUNCTION
' Show Error Page
SUB showError( theError )
%>
<HTML>
<HEAD><TITLE>Pr oblem</TITLE></HEAD>
<BODY>
<b>There was a problem with your registration information</b>
<br><%=theErr or %>
<FORM METHOD="POST" ACTION="registe r.asp">
<INPUT NAME="nextpage" TYPE="hidden"
VALUE="<%=nextp age%>">
<INPUT NAME="newUserna me" TYPE="hidden"
VALUE="<%=Serve r.HTMLEncode( newUsername )%>">
<INPUT NAME="newPasswo rd" TYPE="hidden"
VALUE="<%=Serve r.HTMLEncode( newPassword )%>">
<INPUT TYPE="SUBMIT" VALUE="Continue ">
</FORM>
</BODY>
</HTML>
<%
Response.End
END SUB
' Show the Login Page
SUB showLogin
%>
<!-- #INCLUDE FILE="login.asp " -->
<%
Response.End
END SUB
FUNCTION fixQuotes( theString )
fixQuotes = REPLACE( theString, "'", "''" )
END FUNCTION
%>
