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Background to this problem:

I am using FFmpeg to convert videos - it is working fine. I am sending the FFmpeg requests to the command line using exec() in PHP. I am also using node.js and socket.io to deliver real time updates to my users- this is also working fine. I would like to be able to send a real time alert when the video has completed its conversion.

My question is:

How do I send a request from the command line to my node server. Can I run a JS file from the command line? If not what is the best way round it?

Thank you for your advice,

Chris.

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3 Answers 3

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I would go for curl. Trigger node with curl.

Something like:

curl localhost:3000/encodingCompleted?user=abc&secret=aWy7@

And now node knows "completed" and can send a realtime update back to the user.

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5 Comments

Is that calling a php page? I get this error using curl "curl: (3) <url> malformed". Any ideas?
No it should call node. curl <yourNodeServer>:<nodePort>/path
Du You know in php when the video is done? Will the external-process return to php?
Hi, yeah, I can call php to update db etc but cannot run a js function from within it.
Yes not direct - but indirect. Forget about the curl. It's not necessary in your case. I'll add a new Answer to you question.
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In your case: It makes more sense to call node directly via an url from php instead from the command line.

You can trigger node with an url:

  1. Add a function to your node like "videoEncDone(user)" and bind it to a path like "yournodeserver.de/videoEncDone"

  2. After the encoding/converting has finished, call from php (eg. with fopen) the url plus add all necessary information within the query part of that request.

  3. That's it :) - After the url got called, you have all informations (from the url) in node and can talk to the users browser from node

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ah and for security reasons you should a secret word to the query :)
Ni Nivoc, thank you for the reply. How do I talk to the client's browser from within node?
How do you retrieve the variables sent from the js page?
pagewil: What do you mean with js page? You can transfer variable contents as part of the url that you call from e.g. php like ?var1=123&var2=345
Christopher: I thought that you use node already to deliver realtime updates to the browsers client. "I am also using node.js and socket.io to deliver real time updates to my users"
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For command line JS, you can download the sources for the Mozilla or Chrome javascript engines and build them yourself.

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