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    <p>No. The reason it doesn't work is because Flex does not transmit the cookies when using FileReference#upload. A workaround (for Rails 2.3) is to insert a custom middleware handler for flash requests that takes arguments in the query string and adds them to the HTTP_COOKIE environment before it reaches Rails.</p> <pre><code>require 'rack/utils' class FlashSessionCookieMiddleware def initialize(app, session_key = '_session_id') @app = app @session_key = session_key end def call(env) if env['HTTP_USER_AGENT'] =~ /^(Adobe|Shockwave) Flash/ params = ::Rack::Utils.parse_query(env['QUERY_STRING']) env['HTTP_COOKIE'] = [ @session_key, params[@session_key] ].join('=').freeze unless params[@session_key].nil? end @app.call(env) end end </code></pre> <p>Make sure the file is in your load path and add it to your session_store.rb:</p> <pre><code>ActionController::Dispatcher.middleware.use FlashSessionCookieMiddleware, ActionController::Base.session_options[:key] </code></pre> <p>Then you'll need to output the session key to a view somewhere and load it using ExternalInterface inside of Flex:</p> <pre><code>def upload_path_with_session_information session_key = ActionController::Base.session_options[:key] uploads_path(session_key =&gt; cookies[session_key], request_forgery_protection_token =&gt; form_authenticity_token) end </code></pre> <p>As you can see I have resource called uploads and I use the <code>upload_path_with_session_information</code> helper to give me a nice URL that when POSTED to from FLEX lets you keep your cookie store for everything else.</p> <p>I honestly don't remember where I found this information online, but I can't take the credit for it. Hope it makes sense for you.</p>
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    1. COI just realized you specifically put Rails 2.2 in the topic. Sorry about that.
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