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Logging out users

From: ColdFusion 9 Essential Training

Video: Logging out users

The last step to creating an authentication system for a ColdFusion application is to give the user a way of logging out. Typically you do this by creating a hyperlink that's available on all pages. In ColdFusion, you log out from the ColdFusion Authentication Architecture by calling a tag called cflogout. This is a very simple tag, which takes no attributes. To implement this, I'll create a brand new page in the Login folder of my application. I'll go to that folder in the Navigator view, right-click and choose New > ColdFusion Page.

Logging out users

The last step to creating an authentication system for a ColdFusion application is to give the user a way of logging out. Typically you do this by creating a hyperlink that's available on all pages. In ColdFusion, you log out from the ColdFusion Authentication Architecture by calling a tag called cflogout. This is a very simple tag, which takes no attributes. To implement this, I'll create a brand new page in the Login folder of my application. I'll go to that folder in the Navigator view, right-click and choose New > ColdFusion Page.

I'll name the page logout.cfm. This is another back-end page that the user will never see. I'm going to delete all of the default code and replace it with the tag cflogout. After logging the user out, I'm then going to send them back to the Application homepage with this code, cflocation url="../home/index.cfm". So after logging them out, I'll send them back to the homepage, but because they aren't logged in, they'll once again see the login form.

I'll save that change. I'm done with the page. I'll go to my Includes folder and open the header custom tag. In the navbar section, I'll add a new hyperlink. I'll place the cursor after the link to the Photos folder and put in a spacebar and a separator or a pipe character. Then on the next line, I'll create an anchor tag and I'll set the href attribute to point to ../login/logout.cfm.

That's the page I just created, which executes the cflogout tag and then sends the user to the homepage. Between the anchor tags, I'll display the text Log Out. I'll save the change to that file and now I'll test the entire system. I'll go back to the Navigator view and reopen my homepage, index.cfm, in the home directory. I'll run the page this time in an external browser. I'll log in, typing in the user name of joe and the password of smith.

After logging in, I now have access to the entire site for as long as I keep the browser open. But when I click the logout link, which is now displayed on every page, I'm returned back to the login form where I can type in my user name and password again, or simply close the browser. So those were the three tags that we use to create the authentication architecture: cflogin to execute code for non- authenticated users, cfloginuser to actually log the user in and register them with the ColdFusion security system, and cflogout to disrupt the connection between their browser and the server, and force them to login again the next time they visit the site.

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This video is part of

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ColdFusion 9 Essential Training

95 video lessons · 9714 viewers

David Gassner
Author

 
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  1. 5m 54s
    1. Welcome
      1m 24s
    2. Using the exercise files
      2m 50s
    3. Overview
      1m 40s
  2. 35m 16s
    1. Understanding application servers
      7m 3s
    2. Installing ColdFusion 9 on Windows
      5m 28s
    3. Installing ColdFusion 9 on Mac OS X
      6m 20s
    4. Completing the Configuration wizard
      1m 50s
    5. Starting and stopping ColdFusion on Windows
      4m 7s
    6. Starting and stopping ColdFusion on Mac OS X
      2m 37s
    7. Installing ColdFusion Builder on Windows
      4m 13s
    8. Installing ColdFusion Builder on Mac OS X
      2m 1s
    9. Setting folder permissions on Mac OS X
      1m 37s
  3. 45m 34s
    1. Using Eclipse perspectives and views
      5m 42s
    2. Defining a ColdFusion server
      8m 42s
    3. Creating a ColdFusion project
      4m 40s
    4. Creating and browsing a ColdFusion page
      5m 36s
    5. Defining a default page template
      3m 58s
    6. Setting and outputting variables
      7m 55s
    7. Using the Snippets view
      4m 49s
    8. Using an external browser
      2m 8s
    9. Using online help
      2m 4s
  4. 35m 48s
    1. Adding numbers and concatenating strings
      8m 7s
    2. Using Debug Output
      6m 10s
    3. Inspecting variables with ‹cfdump›
      4m 54s
    4. Using arrays
      5m 21s
    5. Using structures
      3m 51s
    6. Configuring the line debugger
      1m 25s
    7. Using the line debugger
      6m 0s
  5. 53m 45s
    1. Scripting an Apache Derby database
      3m 34s
    2. Defining a data source in ColdFusion Administrator
      6m 13s
    3. Exploring data sources in RDS Dataview
      4m 2s
    4. Using SQL and the ‹cfquery› tag
      6m 58s
    5. Outputting data from a query object
      4m 2s
    6. Outputting a dynamic HTML table from a query
      7m 0s
    7. Generating alternating row colors
      6m 55s
    8. Creating an application directory and home page
      5m 26s
    9. Displaying data on the home page
      5m 43s
    10. Redirecting requests with ‹cflocation›
      3m 52s
  6. 32m 17s
    1. Including pages with ‹cfinclude›
      4m 21s
    2. Creating reusable header and footer files with ‹cfinclude›
      4m 39s
    3. Creating and calling custom tags
      3m 8s
    4. Passing data into custom tags
      2m 34s
    5. Setting default values for custom tag attributes
      4m 51s
    6. Calling custom tags with ‹cfmodule›
      3m 54s
    7. Using a custom tag as a website header
      3m 55s
    8. Creating an application template file
      4m 55s
  7. 52m 6s
    1. Creating a ColdFusion Component (CFC)
      5m 6s
    2. Declaring CFC functions
      3m 28s
    3. Calling CFC methods with ‹cfinvoke›
      2m 28s
    4. Using CFC properties
      4m 51s
    5. Passing data into functions
      3m 38s
    6. Creating and calling CFCs with script syntax
      5m 25s
    7. Generating data access CFCs in ColdFusion Builder
      4m 35s
    8. Calling generated data access methods
      7m 41s
    9. Creating a dynamic HTML table from an array
      8m 8s
    10. Creating an Application.cfc file
      3m 11s
    11. Using an application data source variable
      3m 35s
  8. 32m 56s
    1. Generating an ORM map component
      7m 58s
    2. Enabling an application to use ORM
      1m 58s
    3. Retrieving data with ORM
      2m 55s
    4. Generating mappings for multiple tables
      4m 22s
    5. Filtering data with ORM
      5m 35s
    6. Displaying result data with a custom tag
      10m 8s
  9. 27m 58s
    1. Passing URL variables in hyperlinks
      6m 13s
    2. Passing multiple URL variables
      2m 50s
    3. Encoding URLs with URLEncodedFormat()
      4m 12s
    4. Checking for available variables with isDefined()
      2m 41s
    5. Creating a data-driven hyperlink
      5m 4s
    6. Displaying selected data in a detail page
      6m 58s
  10. 40m 36s
    1. Using HTML data entry forms
      6m 53s
    2. Processing form variables
      3m 24s
    3. Creating self-posting forms with ‹cfform›
      4m 40s
    4. Creating a search interface
      3m 9s
    5. Processing complex queries with HQL
      8m 53s
    6. Creating a dynamic pulldown list with ‹cfselect›
      7m 16s
    7. Displaying form results
      6m 21s
  11. 43m 46s
    1. Building a data entry form for managing data
      5m 15s
    2. Preparing an ORM mapping for inserting data
      3m 47s
    3. Inserting data with ORM
      5m 23s
    4. Retrieving data for an update form
      4m 16s
    5. Populating form controls with existing data
      5m 2s
    6. Updating data with ORM
      2m 56s
    7. Confirming actions with an Ajax message box
      7m 22s
    8. Using JavaScript callback functions
      3m 15s
    9. Deleting data with ORM
      6m 30s
  12. 9m 37s
    1. Defining client-side form validation rules
      4m 14s
    2. Validating on the server with custom CFML
      5m 23s
  13. 18m 9s
    1. Using the Application.cfc onRequest() method
      4m 12s
    2. Creating and using a login form
      4m 53s
    3. Authenticating users with ‹cflogin›
      6m 1s
    4. Logging out users
      3m 3s
  14. 7m 11s
    1. Configuring an FTP site
      2m 27s
    2. Setting a ColdFusion project's synchronization connection
      2m 17s
    3. Uploading files to the production server
      2m 27s
  15. 46s
    1. Goodbye
      46s

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