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I am using API that has some limit of requests in an hour. But my script does all at one time so I lose about 1/3 of requests because I get 403.

Is there any way to check response of wget and if I get 403 to wait 5 mins and retry?

And here is my (for now) test code:

system ("wget \"http://test-link.com/403/\" -O  {$dir}/{$in_dir_counter}.xml");
$test = system ("wget \"http://test-link.com/403/\" -O  {$dir}/{$in_dir_counter}.xml");

echo "responsed - ".$test;      

both returns same.

  • What does your own research suggest? – Dave Nov 7 '13 at 10:48
  • My research? All forums I've read suggests to add timeout for EVERY request. But I can't do it because with such conditions (403) it takes 1-2 days to complete. So if I add like 10sec timeout it would be atleast 4-5 days in best wishes. – user270181 Nov 7 '13 at 10:52
  • It would be helpful if you posted your script or the relevant part of it – Tog Nov 7 '13 at 10:58
  • Just added part of code. Hope it helps. – user270181 Nov 7 '13 at 11:04
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How about using a simple script for that:

  • Run the script once every 5 minutes unless it's running already.
  • Check the age of the local file. If it's older than a specific threshold, download it again.

So if everything wents smooth, nothing happens, unless a file is outdated. If a file is outdated and failed downloading, you can retry next Iteration.

I'm not sure why you tagged this with php, but if you're actually running a php script this approach is rather easy to do (given you've got web sockets enabled):

foreach($files as $file)
    if (@filemdate($local_path + $file) + $cache_duration < time())
        @copy($remote_path + $file, local_path + $file);

Note that $remote_path can indeed be a HTTP or FTP URL. There's no need to invoke wget. The @ will prevent error messages to be printed.

To prove that this won't cause unneeded waiting:

  • Assume you've got 1000 files to download, but you can only download up to 250 files per hour.
  • Set cache_duration to a save time where you'll get all files, like 24h (24 * 60 * 60).
  • Rerun the script above once every hour.
  • The first iteration the first 250 files will be updated. The others will fail.
  • The second iteration the first 250 files will be skipped (due to being recent enough) and the next 250 files will be downloaded.
  • After the fourth iteration you'll have all 1000 files updated/downloaded.
  • Of course you can set a shorter intervall, like 5 minutes, but this will create a lot more requests/traffic (depends on whether this is acceptable).

Alternative script idea:

  • Try to download a file.
  • If it fails, you should be able to determine that based on wget's return value/exit code. So in that case wait 5 minutes, then repeat.
|improve this answer|||||
  • Like i said in comments - it already takes 1-2 days. If I add 5min timeout or start another one it won't help but make it worse. I need to get all request with minimal time waste. – user270181 Nov 7 '13 at 11:06
  • My first approach won't use any timeout. It will try to download all outdated files at once. 5 minutes later you retry, only downloading the files that failed the first attempt. There is only some waiting between attempts downloading everything. – Mario Nov 7 '13 at 11:08
  • as i said all script works 1-2days. It depends on how much info they give me. Sometimes its 15k, sometimes 45k. And I have 2 more scripts. All work in chronological order. So I can't waste time to check all files and retry it. I have to do it in the process. – user270181 Nov 7 '13 at 11:13
  • How about parallelizing it then? You could as well store some pointer or index to the latest file you could retrieve last attempt. Just get a bit creative here. This way you don't have to recheck all files every time; just reset the index once everything is done or so. – Mario Nov 7 '13 at 11:15
  • Right now i am thinking to check a file (where i write info). Because every request creates new file. If the file size is 0 (403) then sleep 5 sec and try again. What do you think about that? – user270181 Nov 7 '13 at 11:21

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