Andrew Pollack's Blog

Technology, Family, Entertainment, Politics, and Random Noise

Tip: Log a user into a Domino website without a page refresh with this simple javascript

By Andrew Pollack on 09/29/2006 at 02:16 PM EDT

These two functions are all you really need.

The trick is in the ultra-simple first function listed below. The function uses the xmlHttpRequest made so famous as the core of the "Ajax" programming style. By doing an Ajax style 'Post' of the credentials to the Domino server, the results you get back which normally redirect you somewhere else, are caught by the request object. You can discard them (or display them if you really want). In this function, I've used the ultra-small icon file "onepixel.gif" as the redirection target so that the server sends back as little data as possible.

Since the server is responding with a page, the session token cookie gets written to the browser normally, and that's all it takes. Now you're logged on and your other Ajax style requests will process normally.

For this to work, you must be using "Session Based" authentication. You also must have the username and password to submit. You can collect that on a form (maybe a popup layer?) if you like. You can even store them in a cookie on the browser side, giving you that "remember me" functionality. Be careful though, as this data won't be encrypted so storing it locally can create a security risk.

A final note on requirements -- the page you are displaying must be from the same server you're logging on to. This is due to a security consideration on the xmlHttpRequest object. The browser will not do a background submit to a different server.

function doDominoLogin(username, password) {
var logReq = createXHTMLHttpRequest() ;
var poststring = "RedirectTo=" + escape('/icons/onepixel.gif') +
"&Username=" + username + "&password=" + password;"POST", "/names.nsf?Login" , false);
if (logReq.status == 200){ return(true); } else { return(false);};

The second function is just to get an XMLHttpRequest object for either IE or Netscape, since it's a bit different for each.

function createXHTMLHttpRequest() {
try { return new ActiveXObject("Msxml2.XMLHTTP") ; } catch (e) {}
try { return new ActiveXObject("Microsoft.XMLHTTP") ; } catch (e) {}
try { return new XMLHttpRequest() ; } catch (e) {}
alert("XMLHttpRequest is not supported on this browser!");
return null;

The new Second Signal web site will be entirely Ajax driven -- no screen refreshes. The functions that talk to the back end pick up when a call fails due to an access requirement, and prompt using a simple html layer. Since the whole site is "windowed" rather than a traditional flowing page, I just gray out the current windows and bring up this one.....

There are  - loading -  comments....

Other Recent Stories...

  1. 03/21/2018Domino Apps on IOS is a Game Changer. Quit holding back.BOOM. This will be as important for the platform as Traveler. If your company has ditched Notes and Domino, I feel sorry for you. For companies that do use Notes/Domino this is a game changer and Apple should be paying attention. Here's why: There are hundreds of little Notes client applications you'd never spend the time and money to build and deploy for your internal user base on IOS that we use Notes for all the time (those of us still using it). Now, those are suddenly ALL available on the iPad. ...... 
  2. 02/15/2018Andrew’s Proposed Gun LawsThese are my current thoughts on gun laws that would radically change the culture and safety of gun ownership in the United States without removing the rights of gun owners or compromising their privacy rights. * Please feel free to link to, or just copy, these ideas. It would be wonderful to see them spread widely and eventually become the basis for something to rally around and become legislation. Update: 3/3/2018 I added #7, increasing the age to purchase. Update: 4/27/2018 Please be aware that I am not ...... 
  3. 05/05/2016Is the growing social-sourced economy the modern back door into socialism?Is the growing social-sourced economy the modern back door into socialism? I read a really insightful post a couple of days ago that suggested the use of social network funding sites like “Go Fund Me” and “Kickstarter” have come about and gained popularity in part because the existing economy in no longer serving its purpose for anyone who isn’t already wealthy. Have the traditional ways to get new ventures funded become closed to all but a few who aren’t already connected to them and so onerous as to make ...... 
  4. 04/20/2016Want to be whitelisted? Here are some sensible rules for web site advertising 
  5. 12/30/2015Fantastic new series on Syfy called “The Expanse” – for people who love traditional science fiction 
  6. 10/20/2015My suggestion is to stay away from PayAnywhere(dot)com  
  7. 08/07/2015Here is one for you VMWARE gurus - particularly if you run ESXi without fancy drive arrays 
  8. 08/06/2015The Killer of Orphans (Orphan Documents) 
  9. 06/02/2015Homeopathic Marketing: Traveler on my Android is now calling itself VERSE. Allow me to translate that for the IBM Notes community... 
  10. 03/17/2015A review of British Airways Premium Economy Service – How to destroy customer goodwill all at once 
Click here for more articles.....

pen icon Comment Entry
Your Name
*Your Email
* Your email address is required, but not displayed.
Your thoughts....
Remember Me  

Please wait while your document is saved.