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Rails redirect using post emulation
# This code isn't safe; at least add escaping to the url and the params.
class ActionController::Base
def redirect_using_post(url, params)
render :text => %Q{<form action="#{url}">#{{|k,v| %Q{<input type=
hidden" name="#{k}" value="#{v}" />}}.join('')}</form><script>document.forms[0].submit()</script>}
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