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CHAPTER 6 s DEPLOYING YOUR WEB SITE
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Figure 6-15. Creating a new database login
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This process simply creates the database login. SQL Server will also require the user you just created to be associated with a specific database. To enable the user to access the AdventureWorks database, you have to authorize this new user to access that database. You don t want every user to be able to access every database, particularly in a large, multi-application environment, so you assign specific users to specific databases using SQL Server Configuration Manager. To do this, find the database in Object Explorer and expand it until you see the Users node (see Figure 6-16).
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Figure 6-16. Configuring database users
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At this point, Object Explorer shows the list of approved database users and their associated login accounts that are configured to have access to the database. Windows usernames will be prefixed by either the machine name or the domain name. So, users on the domain MyDomain will appear as MYDOMAIN\username. Similarly, a user from a machine called DBServer will be prefixed DBServer\username. To add your new WebServiceUser login to the database, right-click the Users folder and select New User. The Database Users New dialog box will then appear (see Figure 6-17). In this dialog box, you can (for this database only) change the user s name by assigning a different name to the user s login account. This is known as aliasing. To avoid confusion, I recommend keeping the database user access name the same as the user s SQL Server login name. For example, if you created a SQL Server user called WebServiceUser, then you should also use WebServiceUser as the username for accessing the database in the Database Users New dialog box (as I ve shown in Figure 6-17). You ll also need to assign the user a role or roles when you authorize them to access a given database. For security reasons, I recommended you give them the minimum amount of control that they need to get their job done. In this case, we know the web service is just reading data, so the db_datareader role is selected.
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Figure 6-17. Adding a user to your database
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By this point, you should be able to sign into the database that resides on your database server from the web service that resides on your web development system by changing the connection string to use the user you just created:
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Data Source=SERVERNAME\SQLExpress;Initial Catalog=AdventureWorks; user id=WebServiceUser;password=WebServiceUser
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Do note here that storing your password in clear text in Web.config like this is a bad idea and a major security risk. In any real environment, you should encrypt the password. This is beyond the scope of this tutorial, but a great reference for how to handle encryption of sections of Web.config can be found here: http://msdn2.microsoft.com/ en-us/library/dtkwfdky.aspx.
CHAPTER 6 s DEPLOYING YOUR WEB SITE
Deploying Your Service Tier
The best way to deploy your application is to use the IDE to deploy it directly to the server. Visual Studio will perform most if not all of the IIS administration for you if you do. Before deploying, though, you should once again edit your Web.config file. You ll see that in the default Web.config, this section is commented out. You should remove the comments:
<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"> <error statusCode="403" redirect="NoAccess.htm" /> <error statusCode="404" redirect="FileNotFound.htm" /> </customErrors>
These lines configure how your ASP.NET application will deal with specific errors. In this case, if the user attempts to access something on your web site they shouldn t, ASP .NET (and IIS) will display a You don t have access to that resource error page. If the resource simply isn t found, it will display a File not found error page. These pages come as part of ASP .NET, but feel free to provide your own. Just replace the page file names you see here with the page file names of the pages you create, and ASP.NET will use your pages. You can add other error pages as well, following the same model. Just add the HTTP error code in the statusCode attribute and the page file name in the redirect attribute, as shown here. Note also that you should ensure that the <compilation> setting in Web.config is set to turn off debugging, like this:
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