[tpm] [OT] Javascript to watch for certain KW from a web page
Shaun Fryer
sfryer at sourcery.ca
Fri Oct 12 01:38:24 PDT 2012
The reason jquery is a good idea, is you probably want to add it as an
onclick to a button or something. It's worth it to take the 10 minutes
to rtfm, and avoid yourself alot of headache with cross-browser
events.
--
Shaun Fryer
647-709-6509
----------------------------------------------------------
perl -e 'print chr for map{$_+=22}($ARGV[0])=~/(\d\d)/g' \
52959394107588899482799210587992861082757785799222
----------------------------------------------------------
On Fri, Oct 12, 2012 at 4:31 AM, Shaun Fryer <sfryer at sourcery.ca> wrote:
> Or for yet another way, also sans jquery...
>
> var iframe = document.createElement("iframe");
> var o = {display:"none", height:0, width:0};
> for (var attr in o) iframe.style[attr] = o[attr]; // append a
> timestamp below to bypass cache
> var getServerStatus = function () { iframe.src =
> "/url/to/your/log/output?" + (new Date ()).getTime() };
> iframe.onload = function() {
>
> var win = iframe.contentWindow || iframe.contentDocument;
> if (/your regexp/.test(win.document.body.innerHTML))
> alert("your process completed");
> else setTimeout( getServerStatus, 60*1000 ); // ~1 minute
>
> };
> getServerStatus();
> document.body.appendChild(iframe);
> --
> Shaun Fryer
> 647-709-6509
> ----------------------------------------------------------
> perl -e 'print chr for map{$_+=22}($ARGV[0])=~/(\d\d)/g' \
> 52959394107588899482799210587992861082757785799222
> ----------------------------------------------------------
>
>
> On Thu, Oct 11, 2012 at 11:05 AM, Antonio Sun <antoniosun at lavabit.com> wrote:
>> Thanks a lot Mark,
>> That works like a charm. I really appreciate your simplified solution sample
>> code.
>>
>> Thanks again everyone for your helps.
>>
>> On Wed, Oct 10, 2012 at 12:12 PM, Mark Jubenville <ioncache at gmail.com>
>> wrote:
>>>
>>> Alternatively if you don't want to do the whole ajax thing, you can do
>>> something similar just checking the text of the body:
>>>
>>> <script>
>>>
>>> var page_check;
>>>
>>> var nMilliseconds = 60*1000; // frequency of server check in
>>> milliseconds
>>> var checkServerStatus = function () {
>>> if ( /Text that you are searching
>>> for/.test(document.body.innerHTML) ) {
>>> // simple javascript alert box
>>> alert("Text you want to display when the search is found");
>>>
>>> // an actual new window/tab
>>> var text_window=window.open("","","width=200,height=100");
>>> text_window.document.write("<p>Text you want to display when
>>> the search is found</p>");
>>> text_window.focus();
>>>
>>> clearInterval(page_check);
>>>
>>> }
>>> };
>>> page_check = setInterval( checkServerStatus, nMilliseconds );
>>> </script>
>>>
>>> That doesn't require jQuery either.
>>>
>>> I put in examples of opening an actual window or just showing an alert
>>> box.
>>>
>>>
>>> On 2012-10-10 11:40 AM, Mark Jubenville wrote:
>>>
>>> I'd use setInerval instead of setTimeout though:
>>>
>>> var page_check;
>>>
>>> var nMilliseconds = 60*1000; // frequency of server check in milliseconds
>>> var checkServerStatus = function () {
>>> $.ajax({ url: "/path/to/your/log/file/script" }).done(function
>>> (jqXHR, textStatus) {
>>> if (/a regexp matching text in your log
>>> file/.test(jqXHR.responseText)) {
>>> $.facybox("The text you wish the user to see in the popup
>>> dialogue.");
>>> clearInterval(page_check);
>>> }
>>> });
>>> };
>>> page_check = setInterval( checkServerStatus, nMilliseconds );
>>>
>>>
>>>
>>> On 2012-10-10 11:27 AM, Antonio Sun wrote:
>>>
>>> Thanks a lot Shaun.
>>>
>>> That sure will pave my way to the right direction.
>>> I'll start playing.
>>>
>>> Thanks everyone!
>>>
>>> On Wed, Oct 10, 2012 at 10:27 AM, Shaun Fryer <sfryer at sourcery.ca> wrote:
>>>>
>>>> Hi Antonio,
>>>>
>>>> That makes sense. Unfortunately it's a little beyond the scope of a
>>>> simple email to provide a complete solution for your situation.
>>>> However, you might try something like the following.
>>>>
>>>> You'll need two things. #1. an ajax function of some kind. Given that
>>>> you aren't interested in learning JS, I'd recommend using a
>>>> cross-browser abstraction library which has an ajax method, such as
>>>> jQuery. #2. You'll need a popup dialogue of some kind. There are
>>>> plenty to choose from. For the purposes of providing an example, I've
>>>> [arbitrarily] chosen the facybox jQuery plugin. I have no direct
>>>> experience with it, but the API seems simple enough, so it should work
>>>> fine.
>>>>
>>>> Add a script tag including the jQuery library, followed by one for the
>>>> plugin for your popup ( http://bitbonsai.com/facybox/ ). Now in a
>>>> separate script tag below this, add code similar to that below
>>>> (modified accordingly).
>>>>
>>>> var nMilliseconds = 60*1000; // frequency of server check in milliseconds
>>>> var checkServerStatus = function () {
>>>> $.ajax({ url: "/path/to/your/log/file/script" }).done(function
>>>> (jqXHR, textStatus) {
>>>> if (/a regexp matching text in your log
>>>> file/.test(jqXHR.responseText))
>>>> $.facybox("The text you wish the user to see in the popup
>>>> dialogue.");
>>>> else setTimeout( checkServerStatus, nMilliseconds );
>>>> });
>>>> };
>>>> setTimeout( checkServerStatus, nMilliseconds );
>>>>
>>>> The above is just pseudo-code, but it *should* work with very little
>>>> modification, assuming you're using the indicated JS libraries.
>>>>
>>>> Hope this helps.
>>>> --
>>>> Shaun Fryer
>>>> ----------------------------------------------------------
>>>> perl -e 'print chr for map{$_+=22}($ARGV[0])=~/(\d\d)/g' \
>>>> 52959394107588899482799210587992861082757785799222
>>>> ----------------------------------------------------------
>>>>
>>>>
>>>> On Wed, Oct 10, 2012 at 9:51 AM, Antonio Sun <antoniosun at lavabit.com>
>>>> wrote:
>>>> > Hi, thanks a lot for your offer Shaun.
>>>> >
>>>> > That was actually what I thought the solution to be. Now let's forget
>>>> > what I
>>>> > said and focus on what I need to accomplish.
>>>> >
>>>> > Yes, I totally control the page content. The situation is,
>>>> >
>>>> > I am designing a web portal that can launch back-end server side
>>>> > processes.
>>>> > The problem is that the process can finish in seconds, or it might need
>>>> > hours to finish, depending how much work the process has. So my design
>>>> > is to
>>>> > spawn a sub process, and capture all its outputs to a log text file,
>>>> > then
>>>> > return immediately to the user, in a web notice page saying, your job
>>>> > is
>>>> > queued; here is the log url; please check manually if is finished or
>>>> > not.
>>>> >
>>>> > But my all my fellow coworkers said they don't want to check
>>>> > themselves.
>>>> > Instead, they want my web portal to check for them. I couldn't think of
>>>> > any
>>>> > solution from the server side to capture the end of the sub process,
>>>> > then
>>>> > informed the already submitted web notice page. Hence, I'm turning to
>>>> > the
>>>> > javascript front-end for solutions. Because I have zero knowledge of
>>>> > Javascript, it might not be feasible at all. But I know the best
>>>> > solution is
>>>> > that if I can have a desktop notification mechanism just like gmail
>>>> > does,
>>>> > that should solve the problem, because my sub process control task does
>>>> > know
>>>> > when the sub process ends, and write a specific ending tag to the end
>>>> > of the
>>>> > log file, which is what I was planning to watch/search for. Every page
>>>> > of my
>>>> > portal does include a standard master template (except the log text
>>>> > file),
>>>> > so if I can send a signal at the end of my sub process and capture that
>>>> > by
>>>> > the master template, then pop up a javascript window, that will do as
>>>> > well.
>>>> >
>>>> > Sorry for the lengthy gibberish, hope that you can figure something out
>>>> > from
>>>> > it.
>>>> >
>>>> > Thanks
>>>
>>> --
>>>
>>> Mark Jubenville | ioncache at gmail.com
>>>
>>>
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>>
>>
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