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Diffstat (limited to 'actionpack/lib/action_controller/base/redirect.rb')
| -rw-r--r-- | actionpack/lib/action_controller/base/redirect.rb | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/base/redirect.rb b/actionpack/lib/action_controller/base/redirect.rb new file mode 100644 index 0000000000..83af793978 --- /dev/null +++ b/actionpack/lib/action_controller/base/redirect.rb @@ -0,0 +1,91 @@ +module ActionController + class RedirectBackError < ActionControllerError #:nodoc: + DEFAULT_MESSAGE = 'No HTTP_REFERER was set in the request to this action, so redirect_to :back could not be called successfully. If this is a test, make sure to specify request.env["HTTP_REFERER"].' + + def initialize(message = nil) + super(message || DEFAULT_MESSAGE) + end + end + + module Redirector + + # Redirects the browser to the target specified in +options+. This parameter can take one of three forms: + # + # * <tt>Hash</tt> - The URL will be generated by calling url_for with the +options+. + # * <tt>Record</tt> - The URL will be generated by calling url_for with the +options+, which will reference a named URL for that record. + # * <tt>String</tt> starting with <tt>protocol://</tt> (like <tt>http://</tt>) - Is passed straight through as the target for redirection. + # * <tt>String</tt> not containing a protocol - The current protocol and host is prepended to the string. + # * <tt>:back</tt> - Back to the page that issued the request. Useful for forms that are triggered from multiple places. + # Short-hand for <tt>redirect_to(request.env["HTTP_REFERER"])</tt> + # + # Examples: + # redirect_to :action => "show", :id => 5 + # redirect_to post + # redirect_to "http://www.rubyonrails.org" + # redirect_to "/images/screenshot.jpg" + # redirect_to articles_url + # redirect_to :back + # + # The redirection happens as a "302 Moved" header unless otherwise specified. + # + # Examples: + # redirect_to post_url(@post), :status=>:found + # redirect_to :action=>'atom', :status=>:moved_permanently + # redirect_to post_url(@post), :status=>301 + # redirect_to :action=>'atom', :status=>302 + # + # When using <tt>redirect_to :back</tt>, if there is no referrer, + # RedirectBackError will be raised. You may specify some fallback + # behavior for this case by rescuing RedirectBackError. + def redirect_to(options = {}, response_status = {}) #:doc: + raise ActionControllerError.new("Cannot redirect to nil!") if options.nil? + + if options.is_a?(Hash) && options[:status] + status = options.delete(:status) + elsif response_status[:status] + status = response_status[:status] + else + status = 302 + end + + response.redirected_to = options + logger.info("Redirected to #{options}") if logger && logger.info? + + case options + # The scheme name consist of a letter followed by any combination of + # letters, digits, and the plus ("+"), period ("."), or hyphen ("-") + # characters; and is terminated by a colon (":"). + when %r{^\w[\w\d+.-]*:.*} + redirect_to_full_url(options, status) + when String + redirect_to_full_url(request.protocol + request.host_with_port + options, status) + when :back + if referer = request.headers["Referer"] + redirect_to(referer, :status=>status) + else + raise RedirectBackError + end + else + redirect_to_full_url(url_for(options), status) + end + end + + def redirect_to_full_url(url, status) + raise DoubleRenderError if performed? + response.redirect(url, interpret_status(status)) + @performed_redirect = true + end + + # Clears the redirected results from the headers, resets the status to 200 and returns + # the URL that was used to redirect or nil if there was no redirected URL + # Note that +redirect_to+ will change the body of the response to indicate a redirection. + # The response body is not reset here, see +erase_render_results+ + def erase_redirect_results #:nodoc: + @performed_redirect = false + response.redirected_to = nil + response.redirected_to_method_params = nil + response.status = DEFAULT_RENDER_STATUS_CODE + response.headers.delete('Location') + end + end +end
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