The gems worked like a charm (so to speak), thanks. In case anyone is
interested, here's a minimal CGI Ruby script to generate a T2Flow PNG
diagram with no temp files:
#!/usr/local/bin/ruby
# Contents is the output for a T2Flow document (Taverna workflow) visualized
# using myExperiment.org gems and 'dot'. The workflow should be posted
as a parameter called 'workflow'
require 'cgi'
require 'rubygems'
require 't2flow/model.rb'
require 't2flow/parser.rb'
require 't2flow/dot.rb'
# Create an instance of CGI
cgi = CGI.new
print "Content-type: image/png\n\n"
# give dot the input (model) to render
dot = IO.popen("/opt/csw/bin/dot -Tpng", "wb+")
T2Flow::Dot.new.write_dot(dot, T2Flow::Parser.new.parse(cgi['workflow']))
# terminate processing
dot.close_write
dot.each {|l| puts l}
___________________________________________________________
Paul Gordon wrote:
Well, my situation os a follows. I export a T2Flow workflow from
Seahawk, but it would be really nice to be able to preview the
workflow that would be generated (as there are few export options
available). So the workflow is transient, and not necessarily
public. A remote workflow image generator based on submission of a
T2Flow doc would be ideal, because then Seahawk would not need to
ensure dot is locally installed. Looks like the easiest solution in
the absence of an existing idempotent generator in myExperiment is for
me to build a simple POST CGI in Ruby myself using the Gems mentioned
earlier.
Thanks for the info,
Paul
Stian Soiland-Reyes wrote:
On Mon, Jan 11, 2010 at 17:12, Paul Gordon <[email protected]> wrote:
I don't suppose in the interim that there's a way to call the Ruby-based
T2Flow diagram generator of Biocatalogue remotely?
Having a lightweight piece of code to generate the workflow diagrams
(either via a network client or a standalone JAR) is DEFINITELY
something I'd like!
If you upload a workflow to myExperiment it should generate a picture for you..
I think that workflow upload also work via the myExperiment REST API -
but I'm not sure if that would generate the preview for you in the
same way that if you use it through the web page..
CCed myExperiment discuss list. :)
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