posting a modified hudson build config using Ruby script

[Anadi Misra]

Hi,

I have a ruby script that creates a release branch from trunk at the start of every release cycle in my project. we recently moved to hudson so I though it will be good if the script itself downloads and modifies Hudson release build config and posts it back. I read from here that it is possible to programatically modify the configuration on Hudson and POST the same XML.

For example if the build is at URL http://somthing.builder.ad/hudson/job/branch then http://somthing.builder.ad/hudson/job/branch/config.xml is the configuration that can be modify and POST-ed back at the latter URL.

My ruby script always gives a 400. please help. here's the script

   
require 'net/http'
require 'rubygems'
require 'rexml/document'
require 'rest_client'

url = 'http://my.buildserver.com/hudson/job/branch/config.xml'
config_xml = Net::HTTP.get_response(URI.parse(url)).body
doc = REXML::Document.new(config_xml)
doc.elements.each('maven2-moduleset/scm/locations/hudson.scm.SubversionSCM_-ModuleLocation/remote') do |ele|
   ele.text = 'svn://my.code.repo.com/project/branches/branch4.6'
end
doc.elements.each('maven2-moduleset/scm/locations/hudson.scm.SubversionSCM_-ModuleLocation/local') do |ele|
   ele.text = 'branch4.6'
end
doc.write( File.new("config.xml","w"), -1 )
#RestClient.post 'http://my.buildserver.com/hudson/job/branch/config.xml', doc, :content_type => 'application/xml'
headers = {
 'Content-Type' => 'application/xml'
}
http = Net::HTTP.new('my.buildserver.com')
resp, data = http.post('hudson/job/branch/config.xml', doc, headers)
puts resp.code

I also tried the RestClient but it seems that does not support POST'ing files

[Balaji Loganathan]

Hi,
Have you tried posting your xml file using some http utility tools like Poster in Firefox to your hudson server ('http://my.buildserver.com/hudson/job/branch/config.xml') ?
Does it accept such submission ?
Regards
Balaji

[Anadi Misra]

hi,

thanks I tried usign the Poster and got it to work when i changed Content-Type header to text/xml however when i tried from the ruby code after making changes I got this error

D:/Ruby/lib/ruby/1.8/net/http.rb:1252:in `key?': undefined method `downcase' for <?xml ... ?>:REXML::XMLDecl (NoMethodError)
	from D:/Ruby/lib/ruby/1.8/net/http.rb:1141:in `initialize_http_header'
	from D:/Ruby/lib/ruby/1.8/rexml/parent.rb:40:in `each'
	from D:/Ruby/lib/ruby/1.8/rexml/parent.rb:40:in `each'
	from D:/Ruby/lib/ruby/1.8/net/http.rb:1140:in `initialize_http_header'
	from D:/Ruby/lib/ruby/1.8/net/http.rb:1472:in `initialize'
	from D:/Ruby/lib/ruby/1.8/net/http.rb:1588:in `initialize'
	from D:/Ruby/lib/ruby/1.8/net/http.rb:772:in `new'
	from D:/Ruby/lib/ruby/1.8/net/http.rb:772:in `get'
	from C:/projects/fun/trunk/tools/svn_tools/do-configure-hudson-build.rb:20
Complete(1)

here's the updated script

require 'net/http'
require 'rubygems'
require 'rexml/document'
require 'rest_client'

url = 'http://my.buildserver.com/hudson/job/branch/config.xml'
config_xml = Net::HTTP.get_response(URI.parse(url)).body
doc = REXML::Document.new(config_xml)
doc.elements.each('maven2-moduleset/scm/locations/hudson.scm.SubversionSCM_-ModuleLocation/remote') do |ele|
   ele.text = 'svn://my.code.repo.com/project/branches/branch4.6'
end
doc.elements.each('maven2-moduleset/scm/locations/hudson.scm.SubversionSCM_-ModuleLocation/local') do |ele|
   ele.text = 'branch4.6'
end
doc.write( File.new("config.xml","w"), -1 )
headers = {
 'Content-Type' => 'text/xml'
}
http = Net::HTTP.new('my.buildserver.com')
resp, data = http.get('hudson/job/branch/config.xml',doc ,headers)
puts resp.code
puts '======================='
puts data

[Lasse Koskela]

It seems that you're trying to pass in a REXML document to http.get() while it's expecting a String.