Hi I am making a cron status page that shows all the status info on scripts run by cron. I know how to build the "showing status info" but I need help and suggestion on the following...
I need to allow a user seeing the status page to have the power to kickoff a cron script manually. Like a button that would call the cron to run a specific script like "now".
Is that possible or is there a workaround I can do?
Please help and thanks in advance.
You can manually execute the cron script:
exec("cron script here");
If you want, you can get the available cron scripts (untested):
$crontab = file_get_contents("path/to/cron");
$cron_jobs = array_filter(explode(PHP_EOL, $crontab), function($cron_job) {
return $cron_job[0] !== "#"; // Remove comments.
});
$cron_jobs = array_map(function($cron_job) {
$fields = explode(" ", $cron_job);
$fields = array_splice($fields, 0, 5); // Get rid of timing information.
return implode(" ", $fields);
}, $cron_jobs);
$cron_script = $_GET["cron_script"];
if ($cron_script < sizeof($cron_jobs)) {
exec($cron_jobs[$cron_script]);
}
Related
Ok, so lets start slow...
I have a pthreads script running and working for me, tested and working 100% of the time when I run it manually from the command line via ssh. The script is as follows with the main thread process code adjusted to simulate random process' run time.
class ProcessingPool extends Worker {
public function run(){}
}
class LongRunningProcess extends Threaded implements Collectable {
public function __construct($id,$data) {
$this->id = $id;
$this->data = $data;
}
public function run() {
$data = $this->data;
$this->garbage = true;
$this->result = 'START TIME:'.time().PHP_EOL;
// Here is our actual logic which will be handled within a single thread (obviously simulated here instead of the real functionality)
sleep(rand(1,100));
$this->result .= 'ID:'.$this->id.' RESULT: '.print_r($this->data,true).PHP_EOL;
$this->result .= 'END TIME:'.time().PHP_EOL;
$this->finished = time();
}
public function __destruct () {
$Finished = 'EXITED WITHOUT FINISHING';
if($this->finished > 0) {
$Finished = 'FINISHED';
}
if ($this->id === null) {
print_r("nullified thread $Finished!");
} else {
print_r("Thread w/ ID {$this->id} $Finished!");
}
}
public function isGarbage() : bool { return $this->garbage; }
public function getData() {
return $this->data;
}
public function getResult() {
return $this->result;
}
protected $id;
protected $data;
protected $result;
private $garbage = false;
private $finished = 0;
}
$LoopDelay = 500000; // microseconds
$MinimumRunTime = 300; // seconds (5 minutes)
// So we setup our pthreads pool which will hold our collection of threads
$pool = new Pool(4, ProcessingPool::class, []);
$Count = 0;
$StillCollecting = true;
$CountCollection = 0;
do {
// Grab all items from the conversion_queue which have not been processed
$result = $DB->prepare("SELECT * FROM `processing_queue` WHERE `processed` = 0 ORDER BY `queue_id` ASC");
$result->execute();
$rows = $result->fetchAll(PDO::FETCH_ASSOC);
if(!empty($rows)) {
// for each of the rows returned from the queue, and allow the workers to run and return
foreach($rows as $id => $row) {
$update = $DB->prepare("UPDATE `processing_queue` SET `processed` = 1 WHERE `queue_id` = ?");
$update->execute([$row['queue_id']]);
$pool->submit(new LongRunningProcess($row['fqueue_id'],$row));
$Count++;
}
} else {
// 0 Rows To Add To Pool From The Queue, Do Nothing...
}
// Before we allow the loop to move on to the next part, lets try and collect anything that finished
$pool->collect(function ($Processed) use(&$CountCollection) {
global $DB;
$data = $Processed->getData();
$result = $Processed->getResult();
$update = $DB->prepare("UPDATE `processing_queue` SET `processed` = 2 WHERE `queue_id` = ?");
$update->execute([$data['queue_id']]);
$CountCollection++;
return $Processed->isGarbage();
});
print_r('Collecting Loop...'.$CountCollection.'/'.$Count);
// If we have collected the same total amount as we have processed then we can consider ourselves done collecting everything that has been added to the database during the time this script started and was running
if($CountCollection == $Count) {
$StillCollecting = false;
print_r('Done Collecting Everything...');
}
// If we have not reached the full MinimumRunTime that this cron should run for, then lets continue to loop
$EndTime = microtime(true);
$TimeElapsed = ($EndTime - $StartTime);
if(($TimeElapsed/($LoopDelay/1000000)) < ($MinimumRunTime/($LoopDelay/1000000))) {
$StillCollecting = true;
print_r('Ended To Early, Lets Force Another Loop...');
}
usleep($LoopDelay);
} while($StillCollecting);
$pool->shutdown();
So while the above script will run via a command line (which has been adjusted to the basic example, and detailed processing code has been simulated in the above example), the below command gives a different result when run from a cron setup for every 5 minutes...
/opt/php7zts/bin/php -q /home/account/cron-entry.php file=every-5-minutes/processing-queue.php
The above script, when using the above command line call, will loop over and over during the run time of the script and collect any new items from the DB queue, and insert them into the pool, which allows 4 processes at a time to run and finish, which is then collected and the queue is updated before another loop happens, pulling any new items from the DB. This script will run until we have processed and collected all processes in the queue during the execution of the script. If the script has not run for the full 5 minute expected period of time, the loop is forced to continue checking the queue, if the script has run over the 5 minute mark it allows any current threads to finish & be collected before closing. Note that the above code also includes a code based "flock" functionality which makes future crons of this idle loop and exit or start once the lock has lifted, ensuring that the queue and threads are not bumping into each other. Again, ALL OF THIS WORKS FROM THE COMMAND LINE VIA SSH.
Once I take the above command, and put it into a cron to run for every 5 minutes, essentially giving me a never ending loop, while maintaining memory, I get a different result...
That result is described as follows... The script starts, checks the flock, and continues if the lock is not there, it creates the lock, and runs the above script. The items are taken from the queue in the DB, and inserted into the pool, the pool fires off the 4 threads at a time as expected.. But the unexpected result is that the run() command does not seem to be executed, and instead the __destruct function runs, and a "Thread w/ ID 2 FINISHED!" type of message is returned to the output. This in turn means that the collection side of things does not collect anything, and the initiating script (the cron script itself /home/account/cron-entry.php file=every-5-minutes/processing-queue.php) finishes after everything has been put into the pool, and destructed. Which prematurely "finishes" the cron job, since there is nothing else to do but loop and pull nothing new from the queue, since they are considered "being processed" when processed == 1 in the queue.
The question then finally becomes... How do I make the cron's script aware of the threads that where spawned and run() them without closing the pool out before they can do anything?
(note... if you copy / paste the provided script, note that I did not test it after removing the detailed logic, so it may need some simple fixes... please do not nit-pick said code, as the key here is that pthreads works if the script is executed FROM the Command Line, but fails to properly run when the script is executed FROM a CRON. If you plan on commenting with non-constructive criticism, please go use your fingers to do something else!)
Joe Watkins! I Need Your Brilliance! Thanks In Advance!
After all of that, it seems that the issue was with regards to user permissions. I was setting this specific cron up inside of cpanel, and when running the command manually I was logged in as root.
After setting this command up in roots crontab, I was able to get it to successfully run the threads from the pool. Only issue I have now is some threads never finish, and sometimes I am unable to close the pool. But this is a different issue, so I will open another question elsewhere.
For those running into this issue, make sure you know who the owner of the cron is as it matters with php's pthreads.
I have been trying to implement multi-threading in php to achieve multi-upload using pthreads php.
From my understanding of multi-threading, this is how I envisioned it working.
I would upload a file,the file will start uploading in the background; even if the file is not completed to upload, another instance( thread ) will be created to upload another file. I would make multiple upload requests using AJAXand multiple files would start uploading, I would get the response of a single request individually and I can update the status of upload likewise in my site.
But this is not how it is working. This is the code that I got from one of the pthread question on SO, but I do not have the link( sorry!! ).
I tested this code to see of this really worked like I envisioned. This is the code I tested, I changed it a little.
<?php
error_reporting(E_ALL);
class AsyncWebRequest extends Thread {
public $url;
public $data;
public function __construct ($url) {
$this->url = $url;
}
public function run () {
if ( ($url = $this->url) ){
/*
* If a large amount of data is being requested, you might want to
* fsockopen and read using usleep in between reads
*/
$this->data = file_get_contents ($url);
echo $this->getThreadId ();
} else{
printf ("Thread #%lu was not provided a URL\n", $this->getThreadId ());
}
}
}
$t = microtime (true);
foreach( ["http://www.google.com/?q=". rand () * 10, 'http://localhost', 'https://facebook.com'] as $url ){
$g = new AsyncWebRequest( $url );
/* starting synchronized */
if ( $g->start () ){
printf ( $url ." took %f seconds to start ", microtime (true) - $t);
while ($g->isRunning ()) {
echo ".";
usleep (100);
}
if ( $g->join () ){
printf (" and %f seconds to finish receiving %d bytes\n", microtime (true) - $t, strlen ($g->data));
} else{
printf (" and %f seconds to finish, request failed\n", microtime (true) - $t);
}
}
echo "<hr/>";
}
So what I expected from this code was it would hit google.com, localhost and facebook.com simultaneously and run their individual threads. But every request is waiting for another request to complete.
For this it is clearly waiting for first response to complete before it is making another request because time the request are sent are after the request from the previous request is complete.
So, This is clearly not the way to achieve what I am trying to achieve. How do I do this?
You might want to look at multi curl for such multiple external requests. Pthreads is more about internal processes.
Just for further reference, you are starting threads 1 by 1 and waiting for them to finish.
This code: while ($g->isRunning ()) doesn't stop until the thread is finished. It's like having a while (true) in a for. The for executes 1 step at a time.
You need to start the threads, add them in an array, and in another while loop check each of the threads if it stopped and remove them from the array.
I'm developing an iOS app and I need to call to a web developed with CodeIgniter. The problem is that I have the response very quickly, but then I need to do some actions with it in CodeIgniter.
How can I do it in background?
My code is something like this:
$data = json_decode($response);
echo $response;
//Data has around 100 rows
foreach ($data as $info)
{
//Database inserts and updates
}
If I comment the foreach, it works perfect, but with it, it takes a lot of time.
I don't want to speed up database, because that's not the problem... what really takes time its what i need to do with my data...
you can try something like below,
class Proc_test extends CI_Controller
{
public function index()
{
echo "Proc_text::Index is called at ".$this->rightnow()."<br>";
$param = 5000000;
$command = "php ".FCPATH."index.php tools proc1 $param > /dev/null &";
exec($command);
$command = "php ".FCPATH."index.php tools proc2 $param > /dev/null &";
echo "Proc_text::Index is done at ".$this->rightnow()."<br>";
}
//a helper to give time of day with microseconds
public function rightnow()
{
$time = microtime(true);
$micro_time = sprintf("%06d", ($time - floor($time)) * 1000000);
$date = new DateTime(date('Y-m-d H:i:s.'.$micro_time, $time));
return $date->format("H:i:s.u");
}
}
Here background command executes as per below example.
$command = "php ".FCPATH."index.php tools proc1 $param > /dev/null &";
It's basically a cli command which follows this form
"php absolute/path/to/codeigniter/index.php controller method argument_1 argument_2 argument_n > pipe to null statement".
Ref. Url : https://forum.codeigniter.com/thread-67870.html
You can solve this issue in two ways.
Create a cronjob to do the time consuming task in the main method you just need to add an enrty to a job table to the post processing after sending the response. So reponse will not wait until all the processing is completed. Also you can schedule the cronjob time as you need depend on the urgency of the post processing and server load.
You can use CodeIgniter hook function to do the processing after sending the response to the caller. The hook method will be "post_system" Read more about it at https://ellislab.com/codeigniter/user-guide/general/hooks.html
Very simply, I have a program that needs to perform a large process (anywhere from 5 seconds to several minutes) and I don't want to make my page wait for the process to finish to load.
I understand that I need to run this gearman job as a background process but I'm struggling to identify the proper solution to get real-time status updates as to when the worker actually finishes the process. I've used the following code snippet from the PHP examples:
do {
sleep(3);
$stat = $gmclient->jobStatus($job_handle);
if (!$stat[0]) // the job is known so it is not done
$done = true;
echo "Running: " . ($stat[1] ? "true" : "false") . ", numerator: " . $stat[2] . ", denomintor: " . $stat[3] . "\n";
} while(!$done);
echo "done!\n";
and this works, however it appears that it just returns data to the client when the worker finished telling the job what to do. Instead I want to know when the literal process of the job finished.
My real-life example:
Pull several data feeds from an API (some feeds take longer than others)
Load a couple of the ones that always load fast, place a "Waiting/Loading" animation on the section that was sent off to a worker queue
When the work is done and the results have been completely retrieved, replace the animation with the results
This is a bit late, but I stumbled across this question looking for the same answer. I was able to get a solution together, so maybe it will help someone else.
For starters, refer to the documentation on GearmanClient::jobStatus. This will be called from the client, and the function accepts a single argument: $job_handle. You retrieve this handle when you dispatch the request:
$client = new GearmanClient( );
$client->addServer( '127.0.0.1', 4730 );
$handle = $client->doBackground( 'serviceRequest', $data );
Later on, you can retrieve the status by calling the jobStatus function on the same $client object:
$status = $client->jobStatus( $handle );
This is only meaningful, though, if you actually change the status from within your worker with the sendStatus method:
$worker = new GearmanWorker( );
$worker->addFunction( 'serviceRequest', function( $job ) {
$max = 10;
// Set initial status - numerator / denominator
$job->sendStatus( 0, $max );
for( $i = 1; $i <= $max; $i++ ) {
sleep( 2 ); // Simulate a long running task
$job->sendStatus( $i, $max );
}
return GEARMAN_SUCCESS;
} );
while( $worker->work( ) ) {
$worker->wait( );
}
In versions of Gearman prior to 0.5, you would use the GearmanJob::status method to set the status of a job. Versions 0.6 to current (1.1) use the methods above.
See also this question: Problem With Gearman Job Status
I've made a basic web crawler to scrape info from a website and I estimated that it should take around 6 hours (multiplying the number of pages by how long it takes to grab the info) but after around 30-40 minutes of looping through my function, it stops working and I only have a fraction of the info I wanted. When it is working, the page looks like it's loading and it outputs where it's up to on the screen, but when it stops, the page stops loading and the input stops showing.
Is there anyway that I can keep the page loading so I don't have to start it again every 30 minutes?
EDIT: Here's my code
function scrape_ingredients($recipe_url, $recipe_title, $recipe_number, $this_count) {
$page = file_get_contents($recipe_url);
$edited = str_replace("<h2 class=\"ingredients\">", "<h2 class=\"ingredients\"><h2>", $page);
$split = explode("<h2 class=\"ingredients\">", $edited);
preg_match("/<div[^>]*class=\"module-content\">(.*?)<\\/div>/si", $split[1], $ingredients);
$ingred = str_replace("<ul>", "", $ingredients[1]);
$ingred = str_replace("</ul>", "", $ingred);
$ingred = str_replace("<li>", "", $ingred);
$ingred = str_replace("</li>", ", ", $ingred);
echo $ingred;
mysql_query("INSERT INTO food_tags (title, link, ingredients) VALUES ('$recipe_title', '$recipe_url', '$ingred')");
echo "<br><br>Recipes indexed: $recipe_number<hr><br><br>";
}
$get_urls = mysql_query("SELECT * FROM food_recipes WHERE id>3091");
while($row = mysql_fetch_array($get_urls)) {
$count++;
$thiscount++;
scrape_ingredients($row['link'], $row['title'], $count, $thiscount);
sleep(1);
}
What's your php.ini's set_time_limit option value? it must be set to 0 in order for script to be able to work infinitely
Try adding
set_time_limit(0);
at the top of your script.