Thursday, December 10, 2009

Convert your Exchange Calendar to iCalendar with Ruby

This example is one that is already in the README, but I thought I'd post it here anyway.  The reasons for converting an Exchange calendar to ical may be many so I won't surmise why you want to do this.  I for one use it to export out to my Orage calendar.

So without further ado ...

require 'rubygems'
require 'viewpoint'
# Get the instance of Viewpoint. This is a singleton class and will
# have only one instance ever instantiated no matter how many times
# you call #instance
vp = Viewpoint::ExchWebServ.instance
# Set authentication parameters (probably NTLM)
vp.authenticate
# This actually calls EWS's FindFolder SOAP message
vp.find_folders
# Get the instance 'Calendar' and convert it
cal = vp.get_folder("Calendar")
ical = cal.to_ical
puts ical.to_ical
# See: http://github.com/zenchild/Viewpoint/blob/master/lib/viewpoint/calendar.rb#L105 for more
# in depth information about what is going on.
view raw cal2ical.rb hosted with ❤ by GitHub
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2 comments:

  1. Tim StephensonFebruary 26, 2010 at 12:49 AM

    Hi

    Thanks for sharing ViewPoint. I'm working through the sample and ran into a problem when authenticating. The error is below. Any suggestions would be very much appreciated.

    The error:

    at depth 1 - 20: unable to get local issuer certificate
    OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient/session.rb:247:in `connect'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient/session.rb:247:in `ssl_connect'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient/session.rb:639:in `connect'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient/timeout.rb:128:in `timeout'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient/session.rb:631:in `connect'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient/session.rb:522:in `query'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient/session.rb:147:in `query'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient.rb:953:in `do_get_block'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient.rb:765:in `do_request'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient.rb:848:in `protect_keep_alive_disconnected'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient.rb:764:in `do_request'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient.rb:666:in `request'
    from /usr/local/lib/ruby/gems/1.8/gems/httpclient-2.1.5.2/lib/httpclient.rb:596:in `post'
    from /Projects/UCSF/rcal/vendor/gems/soap4r-1.5.8/lib/soap/streamHandler.rb:238:in `send_post'
    from /Projects/UCSF/rcal/vendor/gems/soap4r-1.5.8/lib/soap/streamHandler.rb:172:in `send'
    from /Projects/UCSF/rcal/vendor/gems/soap4r-1.5.8/lib/soap/rpc/proxy.rb:179:in `route'
    from /Projects/UCSF/rcal/vendor/gems/soap4r-1.5.8/lib/soap/rpc/proxy.rb:143:in `call'
    from /Projects/UCSF/rcal/vendor/gems/soap4r-1.5.8/lib/soap/rpc/driver.rb:181:in `call'
    from (eval):6:in `resolveNames'
    from /Projects/UCSF/rcal/vendor/gems/viewpoint-0.0.5/lib/viewpoint/exchwebserv.rb:176:in `resolve_name'
    from /Projects/UCSF/rcal/vendor/gems/viewpoint-0.0.5/lib/viewpoint/exchwebserv.rb:216:in `do_auth'
    from /Projects/UCSF/rcal/vendor/gems/viewpoint-0.0.5/lib/viewpoint/exchwebserv.rb:165:in `authenticate'
    from (irb):2>>

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  2. Tim StephensonFebruary 26, 2010 at 7:57 PM

    I got beyond the error above by creating a property file that soap4r reads from and adding:

    client.protocol.http.ssl_config.ca_file = /path/to_ca_file

    However, I still get nothing but 401 responses from the server.

    Any advice?

    ReplyDelete

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