[GRASS-user] R: exwcuting grass python script from php web page

[roberta fagandini]

On 28/09/20 17:51, roberta fagandini wrote:
> Sorry, maybe I didn't explain myself well because actually, I don't get
> any error from the php web page, simply the code related to grass is not
> executed.For instance gsetup.init(gisbase, gisdb, location, mapset) does
> not create any file in my /tmp/ folder and the print(gscript.gisenv())
> is not printed.
> I checked the import of the grass libraries (print(sys.modules)) and
> they seem to be correctly imported.

Have you checked your webservers error logs ?

I have already checked and this is the error in the webserver log file

File "importgrass.py", line 82, in <module>
    main()
  File "importgrass.py", line 71, in main
    rcfile = gsetup.init(gisbase, gisdb, location, mapset)
  File "/usr/lib/grass74/etc/python/grass/script/setup.py", line 170, in init
    config_dir = os.path.join(os.getenv('HOME'), config_dirname)
  File "/usr/lib/python3.6/posixpath.py", line 80, in join
    a = os.fspath(a)
TypeError: expected str, bytes or os.PathLike object, not NoneType


How do you call the python script from PhP?

I tried  both with:
<?php
       $command = escapeshellcmd('/usr/bin/python3 importgrass.py ');
        echo exec($command, $output, $return);
?>

and

<?php
       $command = escapeshellcmd('/usr/bin/python3 importgrass.py ');
        echo system($command, $return);
?>

and

<?php
       $intestazione='#!/bin/bash'.PHP_EOL;
       $command = escapeshellcmd('/usr/bin/python3 importgrass.py ');
       $myfile = fopen("./tmp/script.sh", "w") or die("Unable to open file!");
       fwrite($myfile, $intestazione);
       fwrite($myfile, $command);
       fclose($myfile);
       echo exec("/bin/sh ./tmp/script.sh", $output, $return);
       print_r($output);
?>

Are you sure that your web server has sufficient permissions to access
the relevant directories ?

Yes, I'm pretty sure! If I run the python script from terminal as www-data it works perfectly.

Moritz

Thanks!
Roberta

> ------------------------------------------------------------------------
> *Da:* Moritz Lennert <mlennert at club.worldonline.be>
> *Inviato:* lunedì 28 settembre 2020 17:29
> *A:* roberta fagandini <robifagandini at hotmail.it>;
> grass-user at lists.osgeo.org <grass-user at lists.osgeo.org>
> *Oggetto:* Re: [GRASS-user] exwcuting grass python script from php web page
> On 28/09/20 12:10, roberta fagandini wrote:
>> Hi all!
>> I wrote a python script with grass to be run from a php web page.
>> The python script works perfectly if I run it from the terminal but when
>> I try to run it from the php web page, the grass related part seems to
>> be ignored and the grass session is not launched. I set the grass gis
>> environment following this link [0].
>>  From the php side, I try to launch the python script using both exec(),
>> system() and also a bash script to run the python script but I always
>> got the same error.
>
> Maybe you could tell us what error you get ?
>
> Moritz

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