Download and Copy or Move Server Tutorial

Download and Copy or Move Server Tutorial

Download and Copy or Move Server Tutorial

Yesterday’s Download and Copy or Move Primer Tutorial was all about the “client side” of …

… and we’ve just “tweaked” (albeit, very importantly, in our books (… but the pamphlettes are still not playing ball)) to ensure no “file clobbering” takes place so that the Korn Shell now does …


suf=""
isuf=-1
while [ -f "${dpath}/${brest}${suf}" ]; do
((isuf=isuf+1))
suf="_${isuf}"
done
if [ ! -z "$suf" ]; then
echo "mv ${dpath}/${brest} ${dpath}/${brest}${suf} # `date`" >> download_to_place.out
mv ${dpath}/${brest} ${dpath}/${brest}${suf} >> download_to_place.out 2>> download_to_place.err
fi

… in download_copier.ksh download_copier.ksh Korn Shell scripting on our macOS operating system “client”.

But today is mainly about filling in the missing bits on the “server” side. This (need for a) “conduit” we referred to yesterday is because we accept no folder paths can be mentioned at the “server” end. Suppose, though, that the “non-pathed” filename we supply to an “a” link’s “download” attribute can be prefixed by a mildly mashed up version of that path we copy to from the Downloads folder of your “client” computer or device, as you perform a “download” via the clicking of an “a” link.

Well, at this blog we’d already started functionality to toggle the use or not of …

  • “a” links … with …
  • “href” attribute containing “GETME” …
  • but not “diff.php” … and …
  • “download” attribute (the attribute necessary to “download” rather than our default displaying of source code in a new webpage)

Were you here, then, when we published WordPress Blog Download Mode Toggler Primer Tutorial (or were you indisposed again?!) There we established an “All Posts” menu “Toggle Download Mode from GETME” option piece of functionality to toggle between …

  • displaying of source code in a new webpage for GETME “a” links … versus …
  • use the changed PHP toggle_download.php in conjunction with a changed good ‘ol TwentyTen Theme header.php as below …
    <?php

    if (outs == null) {
    var dnprefix=decodeURIComponent(('' + localStorage.getItem('download_copy_to_folder')).replace(/^null$/g,'')).replace(/\+/g,' ').replace(/\\\\/g, '_').replace(/\//g, '_').replace(/\:/g, '_');
    for (idmjk=0; idmjk<admjk.length; idmjk++) {
    if (admjk[idmjk].href.indexOf('GETME') != -1 && admjk[idmjk].href.indexOf('diff.php') == -1) {

    if (origcafd < 0) { //!cafd) {
    xp=admjk[idmjk].href.split("GETME");
    prexp=xp[0].split("/");
    postprexp=prexp[-1 + prexp.length].split(".");
    extis = postprexp[-1 + postprexp.length].replace(/_/g,"").replace(/-/g,"").replace(/GETME/g,"");
    outs="//www.rjmprogramming.com.au/getmelist.htm?topoff=150&tsp=" + (Math.floor(Math.random() * 1999900) + 100) + "#" + postprexp[0] + "." + postprexp[-1 + postprexp.length].replace(extis,"").replace(extis,"").replace(extis,"") + "GETME" + extis;
    aorig=admjk[idmjk].innerHTML;
    admjk[idmjk].innerHTML=admjk[idmjk].innerHTML.replace(".","<span data-alt='" + outs + "' id='spn" + cafd + "' title=\" + Code Download Table\" onclick=\"if (cafd == cafd) { cafd=" + cafd + "; changeasfordownload(); } else { window.open('" + outs + "','_blank','top=100,left=100,width=500,height=500'); } return false; \">⚫</span>");
    if (aorig == admjk[idmjk].innerHTML) admjk[idmjk].innerHTML=admjk[idmjk].innerHTML.replace(" ","<span data-alt='" + outs + "' id='spn" + cafd + "' title=\" + Code Download Table\" onclick=\"if (cafd == cafd) { cafd=" + cafd + "; changeasfordownload(); } else { window.open('" + outs + "','_blank','top=100,left=100,width=500,height=500'); } return false; \">⚪</span>");
    cafd++;
    } else {
    prestuffs = admjk[idmjk].href.split('/');
    newaspare = admjk[idmjk].href.replace('_-GETME', '').replace('__GETME', '').replace('_GETME', '').replace(big, '');

    while (big.indexOf('-') != -1) {

    big = big.replace('-', '');

    newaspare = newaspare.replace(big, '');

    }

    big = '----------------------GETME';
    stuffs = newaspare.split('/');
    if (dnprefix != '') {
    admjk[idmjk].download = dnprefix + prestuffs[stuffs.length - 1];
    } else {

    admjk[idmjk].download = dnprefix + stuffs[stuffs.length - 1];
    }
    admjk[idmjk].title = "(Really download) " + admjk[idmjk].title + ' ... welcome to the long hover functionality that shows allows for a Download Mode for the blog that can be toggled';
    admjk[idmjk].onmouseover = " getDownloadMode(); ";
    admjk[idmjk].onmouseout = " yehBut(); ";
    admjk[idmjk].ontouchstart = " getDownloadMode(); ";
    admjk[idmjk].ontouchend = " yehBut(); ";
    }
    } else if (admjk[idmjk].href.indexOf('GETME') != -1 && origcafd < 0) { //!cafd) {
    xp=admjk[idmjk].href.split("GETME");
    prexp=xp[0].split("/");
    postprexp=prexp[-1 + prexp.length].split(".");
    extis = postprexp[-1 + postprexp.length].replace(/_/g,"").replace(/-/g,"").replace(/GETME/g,"");
    outs="//www.rjmprogramming.com.au/getmelist.htm?topoff=150&tsp=" + (Math.floor(Math.random() * 1999900) + 100) + "#" + postprexp[0] + "." + postprexp[-1 + postprexp.length].replace(extis,"").replace(extis,"").replace(extis,"") + "GETME" + extis;
    aorig=admjk[idmjk].innerHTML;
    selbitis=allthecombos((admjk[idmjk].href + '=').split('=')[1].split('&')[0]);
    admjk[idmjk].innerHTML=admjk[idmjk].innerHTML.replace(".","<span data-alt='" + outs + "' id='spn" + cafd + "' title=\" + Code Download Table\" onclick=\"if (cafd == cafd) { cafd=" + cafd + "; changeasfordownload(); } else { window.open('" + outs + "','_blank','top=100,left=100,width=500,height=500'); } return false; \"><select onchange=\" if (this.value.length > 0) { window.open(this.value,'_blank'); } return false; \" style='margin-bottom:0px;width:40px;' id='sel" + cafd + "'><option value=>⚫</option>" + selbitis + "</select></span>");
    if (aorig == admjk[idmjk].innerHTML) admjk[idmjk].innerHTML=admjk[idmjk].innerHTML.replace(" ","<span data-alt='" + outs + "' id='spn" + cafd + "' title=\" + Code Download Table\" onclick=\"if (cafd == cafd) { cafd=" + cafd + "; changeasfordownload(); } else { window.open('" + outs + "','_blank','top=100,left=100,width=500,height=500'); } return false; \"><select onchange=\" if (this.value.length > 0) { window.open(this.value,'_blank'); } return false; \" style='margin-bottom:0px;width:40px;' id='sel" + cafd + "'><option value=>⚪</option>" + selbitis + "</select></span>");
    cafd++;
    } else if ((admjk[idmjk].innerHTML.indexOf('live run') != -1 || admjk[idmjk].title.toLowerCase().indexOf('click picture') != -1) && origcafd < 0) { //!cafd) {
    outs="//www.rjmprogramming.com.au/slideshow.html#tuts";
    admjk[idmjk].innerHTML=admjk[idmjk].innerHTML.replace(" ","<span data-alt='" + outs + "' id='spn" + cafd + "' title=\" + Cut to the Chase ... see the blog post list related to live runs and slideshows ... ie. the main point of the blog posting\" onclick=\"if (cafd == cafd) { cafd=" + cafd + "; changeasfordownload(); } else { window.open('" + outs + "','_blank','top=100,left=100,width=650,height=100'); } return false; \">✂</span>");
    cafd++;
    }
    }
    }

    ?>
    … to, depending on whether the user specifies in the “All Posts” toggling’s Javascript prompt window presented, specifies a new comma separated “client folder of interest to copy to” place (stored in window.localStorage), will …

    1. download with the GETME to the Downloads folder and copy off to the specified folder of interest (backing up as necessary) … versus …
    2. the default download mode downloads to the Downloads folder without the GETME parts

See these changes in action below, contextualizing “server” and “client” codes in the full picture of assisted Downloads (copied on to a folder of the user’s interest) …


Previous relevant Download and Copy or Move Primer Tutorial is shown below.

Download and Copy or Move Primer Tutorial

Download and Copy or Move Primer Tutorial

Downloading from “the net” (“server land”) to your computer or device (“client land”) is a big part of the online experience and the sharing of data over the world wide web. But have you ever wondered about the two step design of …

  1. download from “the net” to a Downloads folder on your computer or device … and more often than not …
  2. you, the user, copies or renames this data to another location on your computer or device with command line or with operating system GUI

… ? Why not allow the “server” side define where it can download to on the “client”? Well, that would be a security nightmare, allowing a highjacking of mission critical files on your computer or device. So, I get it, that is a “no no”. But could we have a controlled “arrangement” between …

… ? We think that sounds reasonable and so, today, we start our (two parts or more) mini-project (making step 2 above be considered to be programmatically handled, sometimes) designing a Korn Shell (“client” side) listener to suit our macOS “client” computer, executed as a background process via …


ksh download_copier.ksh &

But what is the conduit, if the “server” web applications/pages cannot define a destination folder other than the macOS Downloads folder for the user involved? Well, that is where we need either …

… to define a “client land” folder to copy to (from the user’s Download folder (receiving the downloaded data).

That first Korn Shell read command interactive input was interesting to us for a command backgrounded via the “&” command suffix. But if stdin and stdout are not mentioned in the command you can answer this interactive input and then the processing the Korn Shell performs proceeds in the background. Exactly what we were hoping for, but weren’t sure that this was the case!

The picture is filled in better tomorrow as we discuss the conduit in more detail tomorrow.

If this was interesting you may be interested in this too.


If this was interesting you may be interested in this too.

This entry was posted in eLearning, Event-Driven Programming, Operating System, Tutorials and tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , . Bookmark the permalink.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>