Client Pre-emptive Iframe Crontab Curl Tutorial

Client Pre-emptive Iframe Crontab Curl Tutorial

Recap to yesterday …

We don’t know if “Client Pre-emptive Iframe” is a concept, but even if it isn’t, we’d like to say something about it today.

To us, it’s the idea that in the web application world, at the client end of things, with Javascript, though there is no file manipulation as such, there is what we’d like to term “Client Pre-emptive Iframe”, as an idea that Javascript functionality teamed with an HTML iframe (and its onload event logic) can achieve a bit of what a serverside language like PHP or ASP.Net can achieve, in terms of using server files, by guessing about their existence as the src= parameter of an HTML iframe element, and sort of “sucking it, and seeing” whether the operation succeeds … ie. pre-emptive guessing, we guess. The point is, even if the guess is wrong, no huge harm is done, and in Javascript, it can be checked for, so why stress out, man person?

… as you can see, also, at Client Pre-emptive Iframe Primer Tutorial.

Today’s HTML/Javascript work of continuous_report.html teams this concept with a Linux web server’s …

• crontab
• curl

… (what a duo!) … where we set up a “Continuous Report” on our web server, where an HTML report is placed via the crontab job …


*/1 * * * * curl http://www.rjmprogramming.com.au/HTMLCSS/continuous_report.php


… repeated every minute using the PHP continuous_report.php (source code) to report on the number of web server processes are running at this snapshot of time at the www.rjmprogramming.com.au web server, which happens to be Linux … otherwise for a Windows web server we’d probably have used a Windows Schedular Batch File setup.

Here, we are very close to the territory of feeds, or shared reporting.

Dates and times fly around everywhere with the code for such reporting, as do timezones relevant to your web server, up at the continuous_report.html Javascript client code.

So try a live run to see what we mean.

Previous relevant Client Pre-emptive Iframe Primer Tutorial is shown below.

Client Pre-emptive Iframe Primer Tutorial

We don’t know if “Client Pre-emptive Iframe” is a concept, but even if it isn’t, we’d like to say something about it today.

To us, it’s the idea that in the web application world, at the client end of things, with Javascript, though there is no file manipulation as such, there is what we’d like to term “Client Pre-emptive Iframe”, as an idea that Javascript functionality teamed with an HTML iframe (and its onload event logic) can achieve a bit of what a serverside language like PHP or ASP.Net can achieve, in terms of using server files, by guessing about their existence as the src= parameter of an HTML iframe element, and sort of “sucking it, and seeing” whether the operation succeeds … ie. pre-emptive guessing, we guess. The point is, even if the guess is wrong, no huge harm is done, and in Javascript, it can be checked for, so why stress out, man person?

So, today, we add client-side “Client Pre-emptive Iframe” business logic functionality, to yesterday’s XML to HTML PHP Three Ways Translation Tutorial, by only adding additional Emailing functionality should an address book HTML file exist at the server. That extra functionality adds an “Email” button.

So that is conditional functionality … unconditionally we add functionality to be able to send “client” “mailto:” email messages should the XML contain id= parameters and <to> … </to> or its ilk defined via the HTML textarea populated and its associated HTML input submit button pressed.

This is a clunky equivalent to PHP’s file_exists method for Javascript client usage, and an aid to determinations of whether specific business logic comes into play.

The HTML code you can call xml_to_html.html and it changed from previously in this way, or you can try a live run, or you can try a live run without the email onload event functionailty.

The PHP code you can call xml_to_html.php and it changed from yesterday in this way, but we’d like to emphasise the client side today, and want you to see that this PHP server-side functionality is optional to the whole process, or you can try a live run, or you can try a live run without the email onload event functionality.

Below we’ll leave you with some quite specific email business logic code …


<script type='text/javascript'>
// ... Some Javascript global variables regarding Client Pre-emptive Iframe addressbook usage

var preqs=location.search.split('addressbook=')[1] ? location.search.split('addressbook=')[1].split('&')[0] : "y";
var qs="?addressbook=" + (location.search.split('noaddressbook=')[1] ? location.search.split('noaddressbook=')[1].split('&')[0].toLowerCase().replace("y","n") : preqs);

// ... more Javascript

// A business logic idea ... messages/note XML with defined id= are user interactively emailable
function checkforemail() {
var ee, eo, preiu, iu, predivs,divs=[],cdivs;
var ecnt=0;
var oto='', ofrom='', osubject='', obody='';
predivs=document.body.innerHTML.toLowerCase().split(' id=');
for (preiu=1; preiu<predivs.length; preiu++) {
cdivs=predivs[preiu].substring(1).split(predivs[preiu].substring(0,1));
iu=0;
divs[iu]=document.getElementById(cdivs[0]);
try {
oto='';
ofrom='';
oheading='';
obody='';
try {
oto=divs[iu].getAttribute('data-to');
if (oto == null) oto='';
} catch (ee) {
oto='';
}
try {
ofrom=divs[iu].getAttribute('data-from');
if (ofrom == null) ofrom='';
} catch (ee) {
ofrom='';
}
try {
obody=divs[iu].getAttribute('data-body');
if (obody == null) obody='';
} catch (ee) {
obody='';
}
try {
osubject=divs[iu].getAttribute('data-heading');
if (osubject == null) {
osubject='';
osubject=divs[iu].getAttribute('data-subject');
if (osubject == null) osubject='';
}
} catch (ee) {
osubject='';
try {
osubject=divs[iu].getAttribute('data-subject');
if (osubject == null) osubject='';
} catch (ee) {
osubject='';
}
}
} catch (ee) {
}
if (oto != '' || obody != '' || osubject != '') {
if (document.getElementById('elinksplace').innerHTML.replace(/&amp;/g,"&").indexOf(('mailto:' + oto + '?subject=' + encodeURIComponent(osubject) + '&body=' + encodeURIComponent(obody)).replace(/&amp;/g,"&")) == -1) {
document.getElementById('elinksplace').innerHTML+='<a href="mailto:' + oto + '?subject=' + encodeURIComponent(osubject) + '&body=' + encodeURIComponent(obody) + '" id="email' + ecnt + '" style="display:none;">From ' + ofrom + "</a>";
ecnt++;
}
}
}
if (ecnt > 0) {
for (var iuc=0; iuc<ecnt; iuc++) {
eo=document.getElementById('email' + iuc);
eo.click();
}
}
}
// A business logic idea ... client pre-emptive iframe ... address book
function getaddressbook(iois) {
var qbits, ie, je, edelim='"', bdone=false;
var idx=['&lt;to&gt;','<to>','<TO>','<To>','data-to="','&lt;from&gt;','<from>','<FROM>','<From>','data-from="','&lt;cc&gt;','<cc>','<CC>','<Cc>','data-cc="','&lt;bcc&gt;','<bcc>','<BCC>','<Bcc>','data-bcc="'];
if (iois != null) {
var aconto = (iois.contentWindow || iois.contentDocument);
if (aconto != null) {
if (aconto.document) { aconto = aconto.document; }
if (aconto.body != null) {
addresscont=aconto.body.innerHTML.replace(/\n/g, ',');
var emailinfo=addresscont.split(',');
for (ie=1; ie<eval(-1 + emailinfo.length); ie+=2) {
if (emailinfo[eval(ie - 1)] != "" && emailinfo[ie].indexOf('@') != -1) {
for (je=0; je<idx.length; je++) {
edelim='&lt;';
if (idx[je].indexOf(edelim) == -1) edelim='"';
if (idx[je].indexOf(edelim) == -1) edelim='<';
if (document.body.innerHTML.toLowerCase().indexOf(idx[je] + emailinfo[eval(ie - 1)].toLowerCase() + edelim) != -1) {
if (document.body.innerHTML.indexOf(idx[je] + emailinfo[eval(ie - 1)] + edelim) != -1) {
if (je < 4 && bdone == false) {
bdone=true;
document.getElementById('bemail').style.display='block';
}
while (document.body.innerHTML.indexOf(idx[je] + emailinfo[eval(ie - 1)] + edelim) != -1) {
document.body.innerHTML=document.body.innerHTML.replace(idx[je] + emailinfo[eval(ie - 1)] + edelim,idx[je] + emailinfo[eval(ie - 1)] + " [" + emailinfo[ie] + "]" + edelim);
}
}
if (document.body.innerHTML.indexOf(idx[je] + emailinfo[eval(ie - 1)].toLowerCase() + edelim) != -1) {
if (je < 4 && bdone == false) {
bdone=true;
document.getElementById('bemail').style.display='block';
}
while (document.body.innerHTML.indexOf(idx[je] + emailinfo[eval(ie - 1)].toLowerCase() + edelim) != -1) {
document.body.innerHTML=document.body.innerHTML.replace(idx[je] + emailinfo[eval(ie - 1)].toLowerCase() + edelim,idx[je] + emailinfo[eval(ie - 1)].toLowerCase() + " [" + emailinfo[ie] + "]" + edelim);
}
}
if (document.body.innerHTML.indexOf(idx[je] + emailinfo[eval(ie - 1)].toUpperCase() + edelim) != -1) {
if (je < 4 && bdone == false) {
bdone=true;
document.getElementById('bemail').style.display='block';
}
while (document.body.innerHTML.indexOf(idx[je] + emailinfo[eval(ie - 1)].toUpperCase() + edelim) != -1) {
document.body.innerHTML=document.body.innerHTML.replace(idx[je] + emailinfo[eval(ie - 1)].toUpperCase() + edelim,idx[je] + emailinfo[eval(ie - 1)] + " [" + emailinfo[ie].toUpperCase() + "]" + edelim);
}
}
}
}
}
}
}
}
}
}
// A business logic idea ... email via XML instructions
function emailit() {
var fs=document.getElementsByTagName('form');
var tas=document.getElementsByTagName('textarea');
if (tas.length >= 3) {
tas[2].innerHTML=tas[0].innerHTML;
fs[0].submit();
}
}

</script>
</head>
<body onload="translate(inxml); if (inxml != preinxml) { checkforemail(); } " style='background-color:orange;'>
<h1 align='center'>XML to HTML - HTML Homegrown - RJM Programming - September, 2015</h1>
<div id='elinksplace'><iframe src="addressbook.html" id="eabook" onload=" if (qs.indexOf('=n') == -1) { getaddressbook(this); } " style="display:none;"></iframe><input onclick=" emailit();" type="button" value="Email" style="display:none;position:absolute;top:280px;left:30px;z-index:7;" id="bemail"></input></div>
</body>
</html>


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