On Thu, Jun 13, 2013 at 11:14 PM, Andrey <[email protected]> wrote:
> You can use https://github.com/sidorares/exec-stream > > var es = require('exec_stream'); var convert = es('imagemagick', > ['options']); rs.pipe(convert).pipe(ws); > > > This looks great. Do you have plans to upgrade it with the latest APIs? It's not obvious, but it will pay to support the updated streams. Using the base classes like I've done in my example gets you all the goodness minimal less fuss. Wrap it in your nice module and it's a one-stop solution. :Marco > > On Friday, 14 June 2013 11:23:08 UTC+10, ryandesign wrote: >> >> I understand that a process that I spawn with >> require('child_process').**spawn() >> *has* three streams: stdin, stdout, stderr. >> >> http://nodejs.org/api/child_**process.html#child_process_** >> child_process_spawn_command_**args_options<http://nodejs.org/api/child_process.html#child_process_child_process_spawn_command_args_options> >> >> But I've now read about require('stream').Transform and it feels like for >> certain types of programs (compression programs like bzip2 or image >> conversion programs like ImageMagick) I would want the spawned process to >> *be* a stream -- a transform stream. >> >> http://nodejs.org/api/stream.**html#stream_class_stream_**transform<http://nodejs.org/api/stream.html#stream_class_stream_transform> >> >> I've tried to find examples of how to wrap a spawned child process in a >> transform stream, and I haven't found any, which makes me think I'm going >> about this the wrong way. >> >> I want to be able to do something like this: >> >> var rs; // a readable stream, maybe a file >> var ws; // a writable stream, maybe an http response >> var convert; // a transform stream that uses ImageMagick's convert >> program >> rs.pipe(convert).pipe(ws); >> >> Am I wrong to want this? >> If not, how to I do this? >> >> -- > -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en > > --- > You received this message because you are subscribed to a topic in the > Google Groups "nodejs" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/nodejs/sbvdxC6i5Yw/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- Marco Rogers [email protected] | https://twitter.com/polotek Life is ten percent what happens to you and ninety percent how you respond to it. - Lou Holtz -- -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nodejs?hl=en?hl=en --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
