{"id":29949,"date":"2017-05-02T03:01:11","date_gmt":"2017-05-01T17:01:11","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/ITblog\/?p=29949"},"modified":"2017-09-22T08:15:13","modified_gmt":"2017-09-21T22:15:13","slug":"ssl-on-linux-crontab-curl-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/ssl-on-linux-crontab-curl-tutorial\/","title":{"rendered":"SSL on Linux Crontab Curl Tutorial"},"content":{"rendered":"
\"SSL<\/a>

SSL on Linux Crontab Curl Tutorial<\/p><\/div>\n

Do you remember when we used PHP and the dynamic duo of Crontab and Curl on a Linux web server for the www.rjmprogramming.com.au domain to continually update its landing page to populate a dropdown of our blog’s postings? Back then, as you can see with More on Linux Crontab Curl Tutorial<\/a>, and into all the incarnations of tutorial_options.php<\/a> we never considered SSL<\/a> and the thought that one day we’d want to be using the web address URL …<\/p>\n


\nhttps:\/\/www.rjmprogramming.com.au<\/a>
\n ... rather than just plain old ...
\nht<\/i>tp:\/\/www.rjmprogramming.com.au<\/a>
\n<\/code><\/p>\n

… <\/p>\n


\nWhat a difference a day made<\/strike> an \"s<\/font><\/b>\" makes<\/font><\/b>
\nTwenty-four little hours<\/font><\/b>
\nBrought the s<\/font><\/b>un and the flowers<\/font><\/b>
\nWhere there us<\/font><\/b>ed to be rain
\n<\/code><\/p>\n

… added security by encryption of your web page contents, that is.<\/p>\n

You can view what amounted to a one line<\/b> (added) change as per …<\/p>\n


\n\/\/ ... other code above ...
\n function guidedextras($ing, $intitle, $xid, $pexcerpt) {
\n global $prevdod, $prevint, $prevret, $retvalp, $prevxid, $and, $ptg, $index;
\n $ing=str_replace(\"https:\",\"\",str_replace(\"http:\",\"\",$ing));<\/b>
\n $thisint = explode(\" \", str_replace(\"_\", \" \", str_replace(\" \", \"++\", str_replace('\"', '%22', str_replace(\"'\", \"%27\", $intitle)))));
\n\/\/ ... other code below ...
\n<\/code><\/p>\n

… this way<\/a> in this tutorial_options.php<\/a> code.<\/p>\n

This is our first of a series of blog posts outlining our journey through SSL www.rjmprogramming.com.au issues. They often revolve around changing absolute URLs starting with htt<\/i>p:\/\/<\/i> to just \/\/<\/i> syntax. If this interests, hope you tag along as we go into more.<\/p>\n

\n

Previous relevant More on Linux Crontab Curl Tutorial<\/a> is shown below.<\/p>\n

\"More<\/a>

More on Linux Crontab Curl Tutorial<\/p><\/div>\n

Sometimes for a website you only want to do a web server task once or a few times a day, and you, ideally, wouldn’t want to run into the remote possibility that two people could perform the task at precisely the same time. This scenario happens often when using server-side languages like ASP.Net and PHP. If it didn’t matter that two people might do the same thing at once then you could do the job within you web-based PHP, and you may consider using a date and time test in your web-based PHP to do your “once or a few times” task in your PHP. This latter idea has the advantage that file ownership issues will probably not crop up because the web user will be manipulating any media or HTML files you may be dealing with, rather than the administrator user that will probably be overseeing your “once or a few times” cron<\/a> job that we show you here today.<\/p>\n

So the task today is to keep the rjmprogramming.com.au’s landing page<\/a> “Tutorials” dropdown up to date with the latest blog postings, rather than having to manually attend to this with interactive (HTML code) edits and (s)ftp<\/a> uploads. You may be wondering why not just write the landing page in PHP, and this is a fair point, but the strategy here at this domain is that the landing page and its “fellow” webpages should be independent of MySql, which, under big loads, can go down, and here we use a watchdog<\/a> to fix that, should it happen. Previously we had a very similar task you can read about with the Linux Crontab Curl Primer Tutorial<\/a> below. It is so similar, let’s use curl<\/a>, PHP and crontab to do this task like with that previous task. So this is command line, and this is batch work, but that worry in other types of batch work where you need to worry about where you are as you do any file management, is handled quite well by the wrapping of the job in curl, which takes as its argument a URL, so, implicitly, the place to work with file management, is handled by curl and the PHP we write (specifically where the code uses dirname(__FILE__)<\/i>).<\/p>\n

Here is the downloadable PHP programming source code you could call tutorial_options.php<\/a> and you will see, if you examine the code that it is very specific to conditions here at this rjmprogramming.com.au domain, so please be aware of that, but maybe its concepts can help you out with something else you are tackling. A list of the specifics you would want to address (should you adapt it for your own purposes) include:<\/p>\n