Find the best way

Deferred Loading

noreply@blogger.com (Dmytro Pastovenskyi) — Wed, 24 Apr 2013 07:00:00 +0000

On my job we are trying to decrease time for loading pages as much as it is possible, we simply want 'fast pages'. We don't want our users waited for 2 seconds each time they load page. We are focusing to keep not more then 0.5-1 second per page and we are doing really a lot in that area. Nowadays It's quite common for most of websites to include javascripts just in head area (or at bottom area) as static html so each time we load pages they will be not responsive till all resources will be loaded. I want to share how to load of javascript files (or any another resouces) just after page loads. It could increase speed dramatically. This solution loads all javascrip files deferred after page load on onload event. That snippet should be minimized and be present on every page where you want to use deferred loading.

Snippet of deferred loader

(function(){
 function deferred(success){
    if (typeof window.onload != 'function') {
   window.onload = success;
  } else {
   var old = window.onload ;
   window.onload = function() {
    old();
    success();
   }
  }
 }

 function getScript(url,success){
  var script=document.createElement('script');
  script.src=url;
  var head=document.getElementsByTagName('head')[0],done=false;
  script.onload=script.onreadystatechange = function(){
    if ( !done && (!this.readyState || this.readyState == 'loaded' || this.readyState == 'complete') ) {
   done=true;
   success();
   script.onload = script.onreadystatechange = null;
   head.removeChild(script);
    }
  };
  head.appendChild(script);
 }

 function getScripts(urls, success){
  var total = 0;
  function trySuccess(){
   total++;
   if(total == urls.length)success();
  }
  
  for (var i = 0; i < urls.length; i++) {
   getScript(urls[i],trySuccess);
  }
 }
 
 var DeferredLoader = window.DeferredLoader = {};
 DeferredLoader.getScript = getScript;
 DeferredLoader.getScripts = getScripts;
 DeferredLoader.deferred= deferred;
})();

How to use loading, in that example we load jQuery, then when it's loaded we load kissmetrics libraries and only then utils.

var urls = {
 jquery: "/javascript/jquery-1.9.1.min.js",
 dependent: ["/javascript/util-2013-04-10m.js"],
 kissmetrics:['//i.kissmetrics.com/i.js','//doug1izaerwt3.cloudfront.net/' + window._kmk + '.1.js' ]
};

DeferredLoader.deferred(function () {
 DeferredLoader.getScript(urls.jquery, function () {
  DeferredLoader.getScripts(urls.kissmetrics, function () {
   DeferredLoader.getScripts(urls.dependent, function(){})
  })
 })
})

Rewriting URL in Domino using DSAPI

noreply@blogger.com (Dmytro Pastovenskyi) — Wed, 06 Mar 2013 08:00:00 +0000

I will briefly describe what we were aiming to achieve. In order to open page with parameters Domino requires to add ?open or ?opendocument action and only after that Domino allows to add parameters. It's quite annoying for us due to some integration with another systems, those systems expect they can simply add parameters just after our pages, i.e.: http://www.host/page?parameter=123 etc. Also important reason - we simply do not like this ?open or ?opendocument in URL.

we want to be able to that:
www.host/page?opendocument&parameter=123 ==> www.host/page?parameter=123

I got couple helpful comments in my previous article about URL control in Domino, that helped me to look on different solutions, thanks guys. However I decided that those solutions a bit complicated to setup and they could do some impact on page load time.

I've been working on DSAPI solution last days and finally with some help I've made it! Now we have full control with our URLs, at least I've such feeling :). Let me share my small success to all of you.

Here you can find main steps you need to do. Please keep in mind, I've updated my code a bit as our logic has many rules when exactly to add parameters.

1. Enable flag to catch Rewrite URL event.

filterInitData->eventFlags = kFilterRewriteURL;

2. Link 'rewrite URL' event with you function.

DLLEXPORT unsigned int HttpFilterProc(FilterContext* context, unsigned int eventType, void* eventData) {
 switch (eventType) {
  case kFilterRewriteURL:
   return RewriteURL(context, (FilterMapURL *) eventData);
  default:
   return kFilterNotHandled;
 }
}

3. Finally the main logic, that makes URL rewriting.

int RewriteURL(FilterContext* context, FilterMapURL* pEventData) {
 FilterParsedRequestLine pReqData;
 unsigned int errid=0;

 // if there are no parameters in URL - nothing to do.
 if (strstr(pEventData->url, "?")==NULL) return kFilterNotHandled;
 // read request as we are going to update query.
 context->ServerSupport(context, kGetParsedRequest, &pReqData, NULL, NULL, &errid);
 // if query starts from opendocument - nothing to do
 if (strncmp(pReqData.pQueryUri, "opendocument", strlen("opendocument"))==0) return kFilterNotHandled;
 // adding opendocument before query and put result in pEventData->pathBuffer
 sprintf(pEventData->pathBuffer, "%s?opendocument&%s", pReqData.pPathUri, pReqData.pQueryUri);

 return kFilterHandledEvent;
}

Solution we did works like a charm and what is very important it does not affect page load time (we measured of course)

Mongodb - Enable Authentication

noreply@blogger.com (Dmytro Pastovenskyi) — Sun, 03 Mar 2013 18:10:00 +0000

Basically it is very easy to do,

1. open mongodb shell
2. open admin db and add admin user (you need to have 1 user otherwise you can' lose access to your databases at all)

use admin
db.addUser("admin","12345")

3. Enable authentication auth=true (simply un-comment it) in config file 'sudo vi /etc/mongodb.conf', save changes and restart mongodb service

sudo service mongodb restart

For more information please read Security Practices and Management

Fighting for control of URL in Domino

noreply@blogger.com (Dmytro Pastovenskyi) — Wed, 27 Feb 2013 14:48:00 +0000

We have really annoying problem for years with our URLs on all websites based on Domino. We use classic approach because we want control all tags + we like jQuery more etc. Our problem is about mandatory action [?open | ?opendocument] for pages with parameters, so if you want to add parameters to your page (i.e. param1=123) you have to add [?open | ?opendocument] just after your URL and only then you are allowed to add parameters.

Not really a huge problem, however we want to use new tracking code from google. That tracking has problems with [?open | ?opendocument]: it does not work correctly in case if first parameter is ?open. So now its blocker for us and we want to fix it for all another cases as well. We want to have possibility get rid off ?open | ?opendocument

Question in few words: "is it possible to get this URL working?"
http://www.e-conomic.com/accountingsoftware?parameter=123
instead of this
http://www.e-conomic.com/accountingsoftware?open&parameter=123

We've tried redirect, substitutions - no success ofc :(.

Next in my queue is DSAPI and I'm sure it can solve that problem (at least from documentation) however I'm not able to do that due to my experience with DSAPI and very very low information in the web.

I've played with different events in DSAPI: kFilterStartRequest, kFilterRawRequest and kFilterRewriteURL and tried to change incoming URL from request but did not success with it. Does any of you guys can give me tips :) what I do wrong or maybe there is another solution how to achieve that quest?

Nodejs and compression of HTML, JS, CSS

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 05 Feb 2013 08:00:00 +0000

To decrease loading time for pages, it is always nice to minify your HTML, CSS and JS. Also to decrease number of requests we inject our minified CSS/JS directly on our pages (ofc we will do that unless our CSS/JS have small size), so minus 2 requests to all pages.

Now time to write couple lines of real code

1. UglifyJS - compress JS

var uglifyJS = require("uglify-js");

var result = uglifyJS.minify("filename.js");
console.log(result.code);

2. Sqwish - compress CSS

var sqwish = require('sqwish');
var filename=app.get('filename.css');
fs.readFile(filename, 'utf8', function(err, data) {
    if (err) throw err;
    var minifiedCss = sqwish.minify(data)
    console.log(minifiedCss);
})

3. HTMLMinifier - compress HTML

var htmlminifier = require('html-minifier');
var minifiedHTML = htmlminifier.minify(data, {
 removeComments: true,
 removeCommentsFromCDATA: true,
 collapseWhitespace: true,
 collapseBooleanAttributes: true,
 removeAttributeQuotes: true,
 removeEmptyAttributes: true
});

So at the result we decreased size of our pages a lot and also decreased number of requests which is also nice, we all love "fast pages".

Node.js first experience and first simple project

noreply@blogger.com (Dmytro Pastovenskyi) — Wed, 30 Jan 2013 13:22:00 +0000

From 2013 I've started to learn (as much as I've free time) Node.js. 'Domino/Notes' still my main, however it is always nice to learn something new.


Node.js is a platform built on Chrome's JavaScript runtime for easily building fast,
scalable network applications. Node.js uses an event-driven, non-blocking I/O model 
that makes it lightweight and efficient, perfect for data-intensive real-time 
applications that run across distributed devices.

Together with Andrew Kuba (who guide me how to 'node') we are doing simple website for one game which is very popular right now, we are aiming to have hundreds users/month :) at some points + it is always nice to do something that is real and online
We are using only couple modules for our first application:

Express - minimal and flexible node.js web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications.
Underscore is a utility-belt library for JavaScript that provides a lot of the functional programming support that you would expect in Prototype.js (or Ruby), but without extending any of the built-in JavaScript objects
mustache is a logic-less templates.
yuicompressor compressor to minify our JS/CSS (we do compress all our CSS/JS and put it directly on page to avoid additional lookups)
html-minifier compressor to minify our HTML

We do not use database right now, however we are planning to use mongodb with mongoose in near future.

Pick LoL is our website (first version) we are working on to get some experience with Node.js

During next couple months I will write more posts about node.js which I'm going to like hopefully :).

First couple days with IBM Domino Designer 9.0 Social Edition

noreply@blogger.com (Dmytro Pastovenskyi) — Mon, 17 Dec 2012 08:00:00 +0000

Worked 2 days already with Domino Designer 9 (I do not really care about changes in Notes 9, as I believe in 'web' direction). I did not find something really new/impressive for developers, however worked only 2 days and also I do not forget that it is just a beta. My impression:

It is fast enough, however I do not feel difference compare to my 8.5.3, perhaps my laptop just too good.
Ext Library is included by default.
I've also read that now we have an API (Java, LS, C API) for C&S, would be great to have it few years ago, now its too late :), but still thanks!
Special places for JAR, I guess it is only for xPages, but not for Java libraries/Agents, need to verify.
Server-side JavaScript debugger for use with xPages (need to verify how it works, but options are present, I saw that :))
$DesignerVersion still says: "8.5.3" when you save elements. I think that would be changed with Release candidate.
There are some new options to "Manage working sets drop-down" I really like, waited for those changes for a long time.
Application Properties got 'Xsp Properties'.
There are also changes to xPages, but I had no time to look on them.
All 'old staff': old window to work with @formula, properties dialog still looks same (and that is sad).

Some words about API for C&S.
I've been working on synchronization Lotus Notes 6.5-8.5 Calendar & Scheduling with huge CRM on my previous job (synchronization in 2 side, from LN to CRM and back) and we spent months to manage that correctly, oh dat recurrent events :), it would help us really a lot if we get such API earlier.

I've read also on some blogs that Domino 9 may have dojo 1.8. which would be nice to have and use.

That's all for now.

Moved from Ukraine to Denmark

noreply@blogger.com (Dmytro Pastovenskyi) — Sun, 16 Dec 2012 08:00:00 +0000

From 1-st December I work and live in Denmark. It's really interesting experience for me and my family. I had been working with e-conomic from Kiev for more than 3 years and at some point company decided that it had sense to invite me to work in main office. Now I'm here, so wanna tell 'hi' to those who live here :)

Couple fresh photos of Copenhagen.

City is ready for Christmas:

Now most funny thing :), we met hundred well organized girls, they marched along the main shop-street of the city and cried slogans about Justin Bieber. It was really funny.

What is comfort zone for Domino developers our days?

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 09 Oct 2012 10:35:00 +0000

Lotus Script is no longer in my 'comfort zone' anymore but Java/JavaScript. That's actually it. We already moved all (well 90%) of backend to Java. Now Lotus Script serves only to provide validation/picklist/msgbox on forms/views for existing 'classic' applications. Now we are slowly moving everything to web and I like that.

We are aiming in few years to let our users to un-install LN and simply use browsers and that would be perfect. That time we should have no even 1 line LS and @Formula.

Exception occurred calling method NotesAgent.runWithDocumentContext(lotus.domino.local.Document) null

noreply@blogger.com (Dmytro Pastovenskyi) — Fri, 03 Aug 2012 14:51:00 +0000

Tried to run agent with 'context document' in xPage (via SSJS) and got this problem. I did not find a way how to solve that except to enable checkbox 'Run as Web User' for agent, however I need to run agent from 'signer' as 'runner' has Reader access and my agent update should document. It's terrible with this problem (if it is problem ofc :)). What should I do know?

ViewEntry and Show multiple values as separate entries

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 03 Jul 2012 09:18:00 +0000

When your view has column with option 'Show multiple values as separate entries' and you use ViewEntry to read data from that column you will have a problem. Result of your getColumnValues() can be different, f.x. in 1 case it can be 'Vector' and in another case 'String'. It depends if entry was really split on few entries because of multi-value. I've lookup around and found this issue already reported on IBM ~3 years ago (IBM whats up?)

Full description of problem

Here is a solution I made

Vector v = entry.getColumnValues();
Object o = v.get(0);
String title = "";
if (o.getClass().equals(String.class)) {
 title = (String) o;
}
else if (o.getClass().equals(Vector.class)) {
 Vector tmp = (Vector)o;
 title = (String) tmp.get(0);
}

Content Is Not Allowed In Prolog

noreply@blogger.com (Dmytro Pastovenskyi) — Mon, 18 Jun 2012 08:51:00 +0000

Got this issue in the morning. We have service that "aggregate" data from multiple RSS into 1 RSS. The issue appeared because at one of RSS we enabled encode option [encode UTF-8] but not [encode UTF-8 without BOM]:

encode in UTF-8
encode in UTF-8 without BOM.

our Java parse does not understand this BOM (byte order mark). So we just swtiched to one without BOM byte. I've made tests using this online tool, it worked just as I expected XMLValidator

Cool trick which I never saw in LotusScript. Pass function as parameter.

noreply@blogger.com (Dmytro Pastovenskyi) — Wed, 13 Jun 2012 13:01:00 +0000

Read this code

'Comments for SetValue
Sub SetValue(src As Variant, target As Variant)
 If IsObject(src) Then
  Set target = src
 Else
  target = src
 End If
End Sub

'Comments for Test
Function Test(value As Variant) As Variant
 SetValue value, Test
End Function

You can call Test(now) or Test(customobject) or Test("ABC") it will return you just same object/value. nice, isn't it?

msgbox Test(now).DateOnly
msgbox Test("Helllo")
msgbox Test(customobject).customProperty

Do not see right now really huge benefits from this but just nice to know this.

Default sort order

noreply@blogger.com (Dmytro Pastovenskyi) — Mon, 11 Jun 2012 17:14:00 +0000

Guys, does anybody make it (Default sort order) working? I played to much with it without success, my Domino server still ignore sorting (as Swedish) for my application.

Predefined NoteID for design elements and applications

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 05 Jun 2012 19:10:00 +0000

Sometime those NoteIDs can be quite useful, so I decided to gather all of them into place I can easy find.

FFFF0002 "About This Database" document
FFFF0004 Default form
FFFF0008 Default view
FFFF0010 Database icon
FFFF0020 Database Design Collection (view)
FFFF0040 Database ACL
FFFF0100 "Using This Database" document
FFFF0800 Replication Formula

ReplicaID for few databases:

0000000000000E00 Mail database
0000000000000E01 Personal Address Book
0000000000000E02 Subscription Database
0000000000000E03 Bookmark

Create Lotus Notes views on fly

noreply@blogger.com (Dmytro Pastovenskyi) — Fri, 30 Mar 2012 18:27:00 +0000

I'm wondering if somebody know how to use views that I created on fly, lets say we have document with embedded view which is not created yet. Before we open this document we create view (but simple triggering agent). However we can't use this view as embedded view on document till we reopen database. Anybody has any idea how we can avoid this problem?

Hope to see this feature at next version of DDE

noreply@blogger.com (Dmytro Pastovenskyi) — Thu, 02 Feb 2012 20:26:00 +0000

That is actually how it should be instead of keeping everything inside of Library. Do you agree? It would solve the problem I described in my previous post which is about working with java libraries in LDD.

Hey, IBM please do that and make our team happy :)

How do you work with Java libraries in LDD?

noreply@blogger.com (Dmytro Pastovenskyi) — Thu, 02 Feb 2012 12:48:00 +0000

Hi guys,

We have faced up (actually long time ago) with problem which is related to Java libraries. Back-end of our applications on Domino is written on Java fully. Each Java library has ofc own classes and packages. However LDD allows to work only 1 person with 1 library at same time and it is really painful for us as we have to wait till another developer finish his job. Does anybody know if there is a way (SVN?) which may resolve our problem?
What we really would like to get - possibility to sync java classes with library, so developers would be able to work with same library and just sync changes to it.
We need something like on screen: java library transform into files and each of file represent own class. So we would sync it in both side...

Any help would be appreciated :)

Error pages in Domino

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 24 Jan 2012 08:37:00 +0000

First of all I'd like to briefly describe few another ways we can use to manage error pages in Domino.

Also notice, I will definitely update post few times more after all.

1. Lazy solution $$ReturnGeneralError and MessageString

It's the most fast and easy solutions, it require to create 1 design element (form) $$ReturnGeneralError, style it and add MessageString somewhere to explain what is wrong

Benefits:

- I see only 1 advantage compare to another approaches, its time to implement. Once you create $$ReturnGeneralError it starts to work. So few clicks and few minutes to manage output UI and you have solution.

Disadvantages:

- works inside of application only. So if you have 10 web applications, you need to manage error page in each of it. However you can setup inheritance and manage all error pages from 1 place etc.

- not very flexible on my opinion as we can operate with form-design elements only.

2. HTTP response headers

Simply create error page as design element or as document (does not matter) and create rule for your website in Domino Directory database. It does not require special knowledge and it is simple to use.

Benefits:

- easy to manage

- path to Error page (means we can use different database to keep error pages)

- we can use both: Design Elements and Documents as error page.

Disadvantages:

- require minor Administration of Domino skills.

- it works in the same way as client side redirection. i.e. user will see “blink” of standard 404 page before loading custom 404 page.

3. "Whole server" solution

Use HTTPMultiErrorPage property in the Notes.ini file, for example HTTPMultiErrorPage=/error.html. Create rule on the Domino server for /error.html to be substituted corresponding page.

Benefits:

Disadvatages:

4. DSPAI as error handler for Domino

Most complicated approach but also most flexible from my point of view. There is quite low information about how to use it. It requires knowledge of Notes C Api as well. If you want to see how it looks, here is very good exampe (it helped me a lot) on loggin using DSAPI

Company I worked in use DSAPI for handling URL already, and now we are near to implement error handling using DSAPI as well (it already implemented it on development server, so soon I will show you real links etc).

DSAPI allows us to catch responses Domino generated for users and we can replace output in case if responce 400, 404 or any another.

I will post most important part of logic here, just to how overview how DSAPI works and what is gives to us. Notice I've changed code a bit, to show only most important part of it (I will copy comments from Paul's example just to make things faster)

1. initiation of filter and register for response event

/*
* FilterInit() - Required filter entry point. Called upon
* filter startup, which occurs when HTTP server task is started.
*/
DLLEXPORT unsigned int FilterInit(FilterInitData* filterInitData) {
   filterInitData->eventFlags = kFilterResponse;
}

so what we did there, say to filter that we want to process response events

2. Link events we registered with functions

/*
* HttpFilterProc() - Required filter entry point. Dispatches the event notifications to the appropriate functions for handling the events.
*/
DLLEXPORT DWORD HttpFilterProc(FilterContext *pContext, DWORD dwEventType, void *pEventData)
{
 switch (dwEventType) {
  case kFilterResponse:
   return Response(pContext, pEventData);
 }

 return kFilterNotHandled;
}

Now we can process Responses to users

3. This is how we process Response to users

int Response(FilterContext* context, FilterResponseHeaders* eventData) {
 int responce = eventData->responseCode;

 if (responce==404) {
  if (Send404(context) == TRUE) {
   return kFilterHandledRequest;
  }
 }
 return kFilterNotHandled;
}

4. Finally code for Send404() how we replace content to users

While you read code you need to know that when we load filter we also initiate a table with KEY-HTML arrays. Yes we keep in memory Error HTML pages with keys we need. Our Keys - domain, we handle error pages on domain level, means for domain1.com - is 1 error page, for domain2.com is another error page. But you can do it in another way its up to you.

int Send404(FilterContext* context) {
 FilterResponseHeaders         response;
 unsigned int   errID = 0;
 char     szBuffer[DEFAULT_BUFFER_SIZE]={0};
 char     pszErrorPage[ERRRO_PAGE_SIZE]={0};
 FilterParsedRequestLine pRequestLine;
 unsigned int   pErrID;
 int      i;

 // As we are returning the entire page to the browser, we can 
 // set the response code to 404 (so the domino web log will show the error)
 response.responseCode=404;
 response.reasonText="Bad Request";
 
 // get domain name (its our key), could be done faster? right now its simple walk via 10-20 documents which is fine for now
 context->ServerSupport(context, kGetParsedRequest, &pRequestLine, NULL, NULL, &pErrID);
 for(i=0; i<errorPagesCount;i++) {
  if (strcmp(errorKey[i], pRequestLine.pHostName)==0) {
   strcpy(pszErrorPage, errorHTML[i]);
   i=errorPagesCount;
  }
 }

 if(strlen(pszErrorPage)<10) {
  sprintf(szBuffer, "Error page on %s is very small, something wrong", pRequestLine.pHostName);
  writeToLog(CRITICAL_MSG, szBuffer);
  return FALSE;
 }

 sprintf(szBuffer, "Content-Type: text/html; charset=UTF-8\n\nContent-length: %i\n\n", strlen(pszErrorPage));
 response.headerText = szBuffer;

 if (context->ServerSupport(context, kWriteResponseHeaders, &response, 0, 0, &errID) != TRUE) {
  sprintf(szBuffer, "Error sending redirect, code: %d", errID);
  writeToLog(CRITICAL_MSG, szBuffer);
  return FALSE;
 }
    if (context->WriteClient(context, pszErrorPage, (unsigned int) strlen(pszErrorPage), 0, &errID) != TRUE) {
  sprintf(szBuffer, "Error sending redirect, code: %d", errID);
  writeToLog(CRITICAL_MSG, szBuffer);
  return FALSE;
 }
 return TRUE;
}

OK guys, I've shared most complicated part of this DSAPI for error handling, rest you have complete yourself (homework :)), but feel free to ask my help here if you need.

benefits:
- most flexible approach (at least from those which I know)
- our logic control everything we want and we clearly see what is going on
disadvantages:
- most complicated ways from all I described
- require knowledge of Notes C API
- I did not try yet this solution with Linux servers (but I know it is possible to do)
- it may crash your Domino server in case if you did you filter wrong (memory leak etc)

5. xPage error handling ~~is on way~~ (on pause actually) and would be nice if somebody help me with that. I've read few articles in past from Per Henrik: XPages custom 404 and error page and Controlling the HTTP response status code in XPages, I think they can be very useful for those who doing in xPages. We will try this approach as we have ongoing huge projects based on xPage.

Hey:
- ask to update/more details to article
- notify me about issues
- let me know if you know better way to handle errors
strongly recommended as it can help to many developers in future.

Using Velocity in Domino

noreply@blogger.com (Dmytro Pastovenskyi) — Mon, 12 Dec 2011 16:49:00 +0000

We are using velocity framework to solve our task with html templates and when we started to work with velocity we faced up with problem below

java.util.MissingResourceException: Can't find resource for bundle java.util.PropertyResourceBundle, key member_access_not_allowed at

java.util.MissingResourceException.(MissingResourceException.java:50) at java.util.ResourceBundle.getObject(ResourceBundle.java:400) at java.util.ResourceBundle.getString(ResourceBundle.java:421) at lotus.notes.JavaString.getFormattedString(Unknown Source) at lotus.notes.AgentSecurityManager.checkMemberAccess(Unknown Source) at java.lang.Class.checkMemberAccess(Class.java:112) at java.lang.Class.getDeclaredMethods(Class.java:675) at org.apache.velocity.util.introspection.ClassMap.populateMethodCacheWith(ClassMap.java:167)

thanks to my friend Adnrew Kuba we have found the issue in velocity's source (well it is an issue only for Domino).

org.apache.velocity.util.introspection.ClassMap.populateMethodCacheWith(MethodCache, Class)

that line we have to change to get only Public methods but not all declared as it requires more access then Domino gives by default (we are not able to to get all private methods into Domino for security reason), so we just changed getDeclaredMethods to getMethods and problem has gone.

Solution for Lotus Domino to the trailing slash problem

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 01 Nov 2011 08:54:00 +0000

2 months ago I've posted article about solution which can solve our problem in Domino with last trailing slash in URL. As I mentioned in my previous post, Domino does not care about url with/without last trailing slash, both way would work for Domino. Well, some of you maybe even find this feature useful because it gives less problems, however what if we talk about SEO (Search Engine Optimization)?

There is actually article from google about to slash or not to slash, where they explain that they handle similar URL with and without last trailing slash as 2 different URL, they also propose ways how to solve this. If you ask what is bad here, answer is quite simple: just image that each URL has it's power/score for google. In case if we have only 1 possible URL for our page all scrore go to it, otherwise we will split them (high score will go to URL which is more often used by people in web).

Now about solution we implemented on our website. We used DSAPI to solve it as it does not do affect speed so much as different solutions. If you want to read more deeply about technical staff, you may want to read this article: solution to the trailing slash problem.

Yes it works like it should, no impact to page load's speed which was "very-very" important to us. And I heared google start to love us a bit more after that.

JavaScript: use power of console

noreply@blogger.com (Dmytro Pastovenskyi) — Sat, 08 Oct 2011 17:19:00 +0000

console.log() - is pretty nice way to display debug information without interrupting user's actions. But do you know that 'console object' has lot of other useful methods? In this article I will try to show another important method in console object.

1. power of output
most common case for using console object is:
console.log("hello word")
but here few more ways how we can use it
console.log("string1", "string2", 1, 2, {proper1:"val1", proper2: 5});
console.log("Do you know that word %s same for all language except english %s. %d < %d", "ananas", "pineapple", 1, 2);

There are few another kind of log (works same as log but has different status)
console.debug(), console.info(), console.warn(), console.error()

console.group() and console.groupEnd() allow you to format very nice output with categories, it is very usefull when you have tons of data in log so you can easy control what is related to etc.
console.group("Food")
console.group("Fruit")
console.log("Apple")
console.groupEnd("Fruit")
console.group("Vegetables")
console.log("Potato")
console.groupEnd("Vegetables")

console.groupEnd("Food")

2. power of time
just put console.time()/console.timeEnd() before/after code where you want to measure time .
Aslo there are profile methods console.profile() and console.profileEnd() which allow to see "stack".

3. power of inspection
I guess most of us often want to see specific properties in HTML fragment, for such tasks we can use console.dir(object) or console.dirxml(element)

Some usefull articles about logging: Firebug about logging and Joe Hewitts about console

Page-layout rel = «next | prev»

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 20 Sep 2011 07:00:00 +0000

Along with the attribute rel = «canonical» to specify a 'search robot' to duplicate content, it is now possible to use the HTML reference value rel = "next" and rel = "prev" to indicate the position of the current page with neighbors in the navigation box. F.x. you have article splitted on 10 pages and you use next/prev buttons in order to move from one page to another. If you want to be sure that most of 'score' from 'google spider' will go to main page red="next"/"prev" is the very good options.

Here is more details about our example

www.example.com/article?id=123page=1
www.example.com/article?id=123page=2
www.example.com/article?id=123page=3
...
www.example.com/article?id=123page=10

Now about rel="next" and rel="prev"
www.example.com/article?id=123page=1
<link rel="next" href="http://www.example.com/article?id=123&page=2" />

www.example.com/article?id=123page=2
<link rel="next" href="http://www.example.com/article?id=123&page=3" />

www.example.com/article?id=123page=3
<link rel="next" href="http://www.example.com/article?id=123&page=4" />

Few notes:

First page should have only rel=«next».

All pages between 1-st and last usually should have both only rel=«next» and rel="prev".

Last page should have olny rel=«prev».

Allowed to use the value rel=«previous» as an alternative to rel=”prev”. Not sure if it has sence :)

In case if you fail with that Google will continue to index your content with own heuristic logic.

sources: View-all in search results and Page-layout rel = «next | prev»

Chrome 13 ready

noreply@blogger.com (Dmytro Pastovenskyi) — Wed, 03 Aug 2011 07:24:00 +0000

Domino resolve URL with and without trailing as same URL, wrong?

noreply@blogger.com (Dmytro Pastovenskyi) — Tue, 02 Aug 2011 14:43:00 +0000

We are faced with a problem (for us) with Domino. The problem is that Domino processes those 2 URL as similar same URL:

http://host/0/unid
http://host/0/unid/

the difference in 'trailing' (for those who thinks in same way as Domino :]). Well, it would be not a problem at all if you do internal staff, even very useful, problems start when we talk about SEO.

It actually affects our websites, as f.x. google 'eats' 2 URL (I mentioned above) as 2 different URL so their 'value' will be split on 2 part + 2 URL with same content also very bad as it is duplicate.

We should be able to either make 301's from the NOT CORRECT to the CORRECT URLs, or respond with a 404 (not found). Both options would be good.

Does anybody know ways how to do it?

[update from 28 October 2011] we've found solution with DSAPI filter, here you can read Solution to the trailing slash problem in Lotus Domino