Re: A Responsive Single Page App (SPA) with 3 Issues to Consider -- WEB400

Sorry I did overengineer it a little bit ... this should be enough in
gotoLink ;-)

// Goto a new unique link function gotoLink (thisHtmlElement,link){
thisHtmlElement.href = genURI(link); }

On Wed, Aug 5, 2015 at 11:52 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

How to avoid cache in GET?

Well cache is something that only applies to GET since POST never
will cache.

Ask yourself if you really want to disable cache in GET's since this
will also disable caching of javascript and CSS files, GIF's and JPG's?

It may be a good idea in test but not in production, however sometimes
you want to force a GET to interact with the server even in production.

As Kevin explained it is very easy to avoid GET being cashed where
you descide it shouldn't cache you just include a unique parameter
in the GET. It requires a little plain javacript:

Or of course if it is in AJAX calls change the method to POST instead
of GET.

Here is a running example ...

<!DOCTYPE html>
<html>
<head>
<title>Building Unique Links for Get To Avoid Caching</title>

<script type="text/javascript">

// Goto a new unique link
function gotoLink (thisHtmlElement,link){
var a = document.getElementById(thisHtmlElement.id);
a.href = genURI(link);
}

// Generate Unique URI
function genURI(link){
var u = pxTS();
var t = link.search("=");
if (t < 0) {
return(link + '?pxId=' + u);
} else {
return(link + '&pxId=' + u);
}
}

// Unique timeStamp for creating Unique URI's
function pxTS() {
var now = new Date();
var ts = new Array(
now.getFullYear().toString()
,now.getMonth().toString()
,now.getDay().toString()
,now.getHours().toString()
,now.getMinutes().toString()
,now.getSeconds().toString()
,now.getMilliseconds().toString()
)
var i;
var retval = '';
for (i=0; i<ts.length; i++) {
if (ts[i].length < 2) ts[i] = '0' + ts[i];
retval += ts[i];
}
return(retval);
}

</script>

</head>

<body>

<a id="link1" href="#" onclick="gotoLink(this,'http://powerext.com');">Go
to this new link</a>

</body>
</html>

On Wed, Aug 5, 2015 at 9:04 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

Gent's

Angular is like EXT JS very advanced OO javascript and therefore they
have a steep lerning curve not only specially for old Cobol and RPG
programmers but also for .ASP and PHP programmers since OO
javascript may be quite different from traditional class based OO
languages since OO javascript also uses prototyping that may be
combined with the traditional class based OO.

If I should start again I would start with taking classes or reading a
book
in the basic concept of OO javascript. That is a huge time saver before
you start using any OO javascript based framework and btw node.js
and websockets.

Also use a network outside the IBM I community, they are all around
you and you will connect with young people to whom OO javascript
is natual. Many of these free groups can be found on
http://www.meetup.com/

On Wed, Aug 5, 2015 at 5:57 AM, Bradley Stone <bvstone@xxxxxxxxx> wrote:

I looked into Angular and I saw nothing there that I needed, especially
for
basic SPAs. jQuery (and a few addons) is all I've needed (so far).

I'm sure if I dug deeper maybe I'd find something worth using, but I
think
it's much more work than needed.

My main thing was I did a few of the tutorials/lessons online and kept
thinking "ok.. how do I load data dynamically from my server... XML,
JSON,
or the next big thing.... static data is useless!"

I really grow tired of these examples where the data "fits" the lesson
(because it's created specifically FOR the lesson) when in reality the
data
and business rules are the wildcard in the project.

Brad
www.bvstools.com

On Tue, Aug 4, 2015 at 6:45 PM, Kelly Cookson <KCookson@xxxxxxxxxxxx>
wrote:

Kevin,

I definitely am a JavaScript newbie, which is one reason I've been
delaying jumping into Angular. I want to get more familiar with

JavaScript

first. Also, I am waiting for other developers in my shop to learn

Angular

so I can lean on them for help.

I think your assessment of Angular correlates with what I've heard from
other people using Angular: it has some great features, some difficult

to

understand features, and is not for developers who lack a solid
understanding of web development fundamentals.

Thanks,

Kelly Cookson
IT Project Leader
Dot Foods, Inc.
1.217.773.4486 ext. 12676
kcookson@xxxxxxxxxxxx

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Kevin
Turner
Sent: Tuesday, August 04, 2015 6:40 PM
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] A Responsive Single Page App (SPA) with 3 Issues

to

Consider

Angular has some nice intuitive features, and others that are downright
bizarre. Most out of the box directives (you can write your own too)

are

bound to properties in the controller scope either directly or via
expressions. The controller is a JavaScript component of an angular

module,

and the scope is like the private data repository for the page. One

thing

is for sure, you have to have a pretty deep understanding of

JavaScript -

not just the simple syntax but how closures, objects and injection

work to

be able to understand Angular properly. Personally I don't think it

is a

Framework that a JavaScript newbie will cope with too well (not that I

am

suggesting you are one of those :) ) On the positive side, there are
plenty of examples and helpers on StackOverflow.

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Kelly
Cookson
Sent: 04 August 2015 20:02
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] A Responsive Single Page App (SPA) with 3 Issues

to

Consider

Mark,

Yeah, it looks like Angular is becoming the standard framework for
creating SPAs in our shop. I just haven't had time to learn it yet.

(It's a

BIG learning curve going from IBM i COBOL to contemporary web

development.)

I definitely agree that SPAs are not a magic bullet for every

situation. I

think an SPA might be useful for static content under some

circumstances:

1. If you have valued mobile users that have slow, limited bandwidth
connections to the Internet, then an SPA can help minimize the amount

of

information downloaded from the server. This can improve user

experience.

2. If the number of concurrent users is stressing the capacities of

your

servers, then an SPA can minimize the amount of bandwidth used, and

hence

the load on your servers.

Even under the circumstances of a static website, it can depend. If

your

website is basically a bunch of links to PDF files the users have to
download, then I don't know how much an SPA would help for static

content

in the form of PDF downloads.

Thanks,

Kelly Cookson
IT Project Leader
Dot Foods, Inc.
1.217.773.4486 ext. 12676
kcookson@xxxxxxxxxxxx

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Mark
Murphy/STAR BASE Consulting Inc.
Sent: Tuesday, August 04, 2015 1:43 PM
To: Web Enabling the IBM i (AS/400 and iSeries)
Subject: Re: [WEB400] A Responsive Single Page App (SPA) with 3 Issues

to

Consider

I guess this comes down to using the right tool for the job. SPA's

sound

like a good tool to build an interactive database application where a
"page" really doesn't make sense. Why would you want to drop into the
middle of a transaction, or would that even be a good thing to do?

But, for

navigating a corporate web site that is document based, it just doesn't
seem to fit the bill. I don't see one approach ever fitting all

situations.

Maybe what you really need is an MVC framework providing navigation

with

the content being your SPA when appropriate, and static pages when

that is

appropriate.

Mark Murphy
STAR BASE Consulting, Inc.
mmurphy@xxxxxxxxxxxxxxx

-----Kelly Cookson <KCookson@xxxxxxxxxxxx> wrote: -----
To: "Web Enabling the IBM i (AS/400 and iSeries)" <web400@xxxxxxxxxxxx

From: Kelly Cookson <KCookson@xxxxxxxxxxxx>
Date: 08/04/2015 01:43PM
Subject: Re: [WEB400] A Responsive Single Page App (SPA) with 3 Issues

to

Consider

One thing I have grown to dislike about having a single page app is
browser caching. I make changes to the files used for content within

the

single page app, but I often have to clear my browser cache for the

changes

to show up.

Add this to the fact that users cannot add particular "pages" to their
browser favorites. A favorites link always takes the user to the home

page.

I'm guessing there are methods for getting around these issues. If this
were going to be a large website that a business had to spend money to
maintain, or a website used by tons of people where maximum

performance was

a necessity, then I would probably do more research to resolve the

above

issues. I definitely see the maintenance and performance benefits of

single

page apps.

But this is just a hobby site and unlikely to be used by many people. I
don't mind spending time on it because, well, that's what hobbies are
for...spending time. So I'm going back to making it a traditional web

site

with multiple HMTL files.

The link http://www.socialhope.info/code/SocialHope_REBOOT.zip will
continue to have the source code for the single page app version of the
website, for those who find this thread in a search or simply want to
download the code later.

Kelly Cookson
IT Project Leader
Dot Foods, Inc.
1.217.773.4486 ext. 12676
kcookson@xxxxxxxxxxxx

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To post a message email: WEB400@xxxxxxxxxxxx
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Before posting, please take a moment to review the archives
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list
To post a message email: WEB400@xxxxxxxxxxxx
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--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>

--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/>