Re: [ldm-users] understanding the PIPE action

I will say yep the below example does infact work
thanks to all



Here is a working php example:

$fp = fopen('php://stdin','r');
$data = "";
while(!feof($fp)) {
     $data .= fgets($fp,4096);

You'd want to run the LDM pipe with -close option to make sure pqact
closes the pipe while only sending one product to it.


On Sun, 7 Jun 2009, Matt Alonso wrote:

> Hi Jeff,
> I might be misunderstanding what you are looking to do but if you want to
> feed the contents of a file - as STDIN - to a php script I think you need 
> to
> do this:
> php /path/to/php/script.php < /path/to/input.txt
> So your bash script should look like this:
> #!/bin/sh
> php /usr/local/ldm/decoders/test.php < "$1"
> I believe the way you have it setup currently, PHP is treating the 
> contents
> of the files as individual arguments.  Please note that I have never
> actually done or tested any of this so I will apologize now if it does not
> work.  Also, based on my minimal experience w/all of this I would *THINK*
> that the LDM PIPE action is fundamentally doing the same thing as my
> proposed change for the shell script so if you just swap the php script 
> for
> the shell script in the pqact you might be ok.
> One other thought is that it might be worthwhile to leave the process as 
> is
> where you dump the data to an actual file and then pipe that into PHP b/c
> if, for some reason, there is a hiccup in apache or in the code itself, I
> would think that the data you were attempting to ingest will no longer be
> accessible.
> If this doesn't work let me know and it might be helpful to see the actual
> PHP src you are using.  Best of luck.
> Cheers,
> Matt
> On Sun, Jun 7, 2009 at 3:02 PM, Jeffrey Lake - Admin <
> admin@xxxxxxxxxxxxxxxxxxxx> wrote:
>> Thanks to Daryl and all,
>> I will leave it the way I currently have it set,
>> LDM writes it to a file, then fires off the php script to do
>> with it what is needed, I thought maybe I could eliminate
>> a step but probably not ..
>> -Jeff

  * Daryl Herzmann
  * Assistant Scientist -- Iowa Environmental Mesonet

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