I just over-rode Merb::Rack::Application#call to process multiple
controller-requests.
Has any one else done this yet? My implementation is very raw, just a
proof-of-concept, but it works.
I'm using this to process ajax requests where a certain param contains
a json-encoded array of requests. each json-encoded request has an
url param matching a standard Merb route.
eg: requests: [{url: '/products/view/1}, {url: '/accounts/list'}]
# if any request comes into /router, look for json-encoded array of
requests in param "requests"
if env["REQUEST_PATH"] == "/router"
body = env[Merb::Const::RACK_INPUT]
body.rewind if body.respond_to?(:rewind)
json = body.read
params = Merb::Parse.query(json)
requests = JSON.parse(params["requests"])
status = nil
responses = []
headers = nil
rack_response = nil
# iterates array of requests and dispatch to each controller.
requests.each do |req|
env["REQUEST_URI"] = req["url"]
env["REQUEST_PATH"] = req["url"]
rack_response = ::Merb::Dispatcher.handle(Merb::Request.new
(env))
responses << rack_response[2] # <-- capture each response
body
status = rack_response[0]
headers = rack_response[1]
end
# compose a rack response from the array of responses. this is
pretty ugly right now. assumes each
# controller's action returned json.
rack_response = [status, headers, "[" + responses.join(',') + "]"]
else # <-- otherwise, do normal behaviour.
rack_response = ::Merb::Dispatcher.handle(Merb::Request.new(env))
end
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