=== Using XMLRPC from Ruby ===

You can either use the XMLRPC functionality included in the [http://ruby-doc.org/stdlib/libdoc/xmlrpc/rdoc/index.html Ruby Standard Library] or [/attachment/wiki/XmlRpcPlugin/trac4r.tar.gz download the trac4r library] which does all the trivial stuff for you.

please refer to the '''SSL Support''' section if you need one.

==== trac4r Example ====
This example uses trac4r:
{{{
#!ruby
require 'trac4r'
# initialize the connection (username and password can be ommitted if not needed, but most of the time you will need them if anonymous doesn't have XMLRPC permissions)
trac = Trac.new "https://dev.example.com/trac/my_awesome_project", "myusername", "mypassword"
# get a list of all tickets (as an array of numbers)
trac.tickets.list :include_closed => true # this is the default anyway
# get all the tickets
# NOTE: the results here are cached, so you can call it as often as you want without producing traffic more than once.
# use ":cached_results => false" to get the latest version
trac.tickets.get_all :include_closed => true
# get a single ticket
ticket = trac.tickets.get 5
# print the data
puts "Title: #{ticket.summary}"
puts "Description: #{ticket.description}"
puts "Milestone: #{ticket.milestone}"
puts "Status: #{ticket.status}"
puts "Type: #{ticket.type}"
puts "Priority: #{ticket.priority}"
# get a list of all wiki pages
trac.wiki.list
# download one page
trac.wiki.get_html "SomeRandomPageName" # HTML version
trac.wiki.get_raw "AnotherRandomPageName" # trac syntax version (e.g. for editing)
# for previews use
trac.wiki.raw_to_html "content of a page in [wiki:WikiFormatting Trac syntax] as a ''String''"
# to post a page use
trac.wiki.put "NameOfThePage", "content in Trac syntax"
# list the attachments of a wiki page
trac.wiki.attachments "NameOfThePage"
# save an attachment
File.new("my_cool_document","w") do |f|
  f.write trac.wiki.get_attachment "NameOfThePage", "my_cool_document.pdf"
end

# upload an attachment to the page above
page = "NameOfThePage"
fn = "my_nice_doc.pdf"
fh = File.new(fn, "rb")
sdata = fh.read
data = XMLRPC::Base64.new(sdata)
result = trac.wiki.put_attachment(page, name, "uploaded via ruby script", data)
# the correct result should be the name of the file:
puts "ERROR: uploading #{name} didn't work properly!" if result != name
}}}

Also see the included Documentation in trac4r/doc

If you need to do a custom query do
{{{
#!ruby
trac.query("system.getAPIVersion")
}}}
The first argument is the method name, all other arguments are directly passed to XMLRPC.
For this example of cause you could do `trac.api_version` instead ;)

If you have any problems with trac4r you can email me: niklas.cathor (eat) gmail dot com

==== xmlrpc Example ====

An example using XML-RPC directly with Ruby to append to a wiki page:
{{{
#!ruby
require 'xmlrpc/client'
user = "username"
password = "password"
page_name = "SandBoxRPC"
new_content = "\n\nMy new content"
new_comment = "Adding new content from ruby"

server = XMLRPC::Client.new2("https://#{user}:#{password}@trac.server.com/trac/login/xmlrpc")
content = server.call("wiki.getPage", page_name) + new_content
server.call("wiki.putPage", page_name, content, {"comment" => new_comment})
}}}

==== SSL Support + X509 ====
The standard ruby xmlrpc client for some reason does not support SSL at all.
In order to be able to use the XMLRPC over SSL with both
 * Client Certificate authentication
 * Basic Authentication
One must do as follows.

in order to proceed, you should have:
 * ca certificate in .pem format
 * personal certificate + RSA key in .p12 format (and its password, of course)
 * patched version of xmlrpc/client.rb
 * patched version of trac4r
 * username/password (for basic authentication)

Assuming you have the above, and your ca and user certificates are respectively:
{{{
~/.openssl/cacert.pem
~/.openssl/certkey.p12
}}}
===== The Instructions =====
 1. apply the patches:
   1. to the [attachment:"xmlrpc-client.SSL.patch" xmlrpc client]
{{{
sudo su -
cd /usr/lib/ruby/1.8/
patch -p0  < /path/to/xmlrpc-client.SSL.patch
}}}
   1. to the [attachment:"trac4r-1.2.3.SSL.patch" trac4r gem]
{{{
sudo su -
cd /var/lib/gems/1.8/gems/
patch -p0  < /path/to/trac4r-1.2.3.SSL.patch
}}}
 1. create a .yml file called {{{~/.trac/creds.yml}}} of the following structure:
{{{
--- 
tracurl: https://yourserver.yourdomain/yourproject
tracuser: yourwebuser
tracpass: yourwebpassword
certkey: /home/youruser/.openssl/certkey.p12
cacert: /home/youruser/.openssl/cacert.pem
keypass: yourkeypassword
}}}
   * do not forget to chmod the personal files to 600 or 400
 1. use the data in the code
{{{
#!ruby
require 'yaml'
require 'openssl'
require 'xmlrpc/client'
require 'trac4r'

## read the data from yaml:
$ymlname= "#{ENV['HOME']}/.trac/creds.yml"
if !File.exists?($ymlname) 
    raise "Cannot open credentials file!"
end
begin
    $vars = YAML::load_file($ymlname)
rescue Exception => e
    raise "Cannot load credentials file #{$ymlname}: #{e.message}\nTrace: #{e.stacktrace}"
end

## extract the certificate, and the key from the fles.
pkcs = OpenSSL::PKCS12.new(File.open($vars['certkey']),$vars['keypass'])
cert = pkcs.cert
key = pkcs.key
## connect to the server
trac = Trac.new($vars['tracurl'], $vars['tracuser'], $vars['tracpass'], $vars['cacert'], cert, key)
## from now you can refer to the connection as open (or query it)
## use the API as explained above.
}}}

'''NOTE:''' The working environment of the code (trac4r + ssl) is:
 * Debian/GNU system: {{{Linux hostname 2.6.26-2-686 #1 SMP Mon Jun 21 05:58:44 UTC 2010 i686 GNU/Linux}}}
 * OpenSSL: {{{OpenSSL 0.9.8g 19 Oct 2007}}}
 * Ruby: {{{ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux]}}}
 * The certificates have been issued by the above OpenSSL setup.