we need more examples

[blairn]

I'm trying to build a mux based system, but we have no examples around setting headers, and how to put stuff in various parts of the chain.

I've tried...

#  Access-Control-Allow-Origin: *
function withCors(app, req)
  res = app(req)
  res.headers["Access-Control-Allow-Origin"] = "*"
  res
end

but, the app(req) is not a response object. and I have no way I can find of turning it into one.

The examples all seem to think that app(req) does give you a response object.

and if you want many of your pages to use the same middle layer AFTER the page call, how do you tell it to do that?

[amellnik]

Is this possible with Mux at the moment? If not, it can't be used for any sort of real situation...

[amellnik]

If I use HttpCommon I can construct a response object that includes the necessary headers with something like

resp = Response(200, getHeaders(), JSON.json(Dict("data" => 1, "error" => false)))

but I can't figure out to attach it to a route in Mux -- things like

@app test = (
    Mux.defaults,
    page(respond("Nothing to see here...")),
    route("/test",  req -> respond(Response(200, getHeaders(), "meh"))),
    Mux.notfound()
)
serve(test, port=7777)

don't work.

[shashi]

it seems you can return a Dict with :status, :headers, and :body keys to do this.

[amellnik]

It seems like it should work, but that returns a response with default headers and no body no matter what:

@app test = (
    Mux.defaults,
    page(respond("Nothing to see here...")),
    route("/squareit", squareit),
    route("/solveit", solveit),
    page("/test", req -> Dict("body" => "meh")),
    Mux.notfound()
)

returns the following for all three of the routes

Request URL:http://localhost:7777/test
Request Method:GET
Status Code:200 OK
Remote Address:127.0.0.1:7777
Response Headers
view source
Connection:keep-alive
Content-Language:en
Content-Length:0
Content-Type:text/html; charset=utf-8
Date:Sun, 08 Jan 2017 22:26:38
Server:Julia/0.5.0
Request Headers
view source
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding:gzip, deflate, sdch, br
Accept-Language:en-US,en;q=0.8
Cache-Control:max-age=0
Connection:keep-alive
Host:localhost:7777
Upgrade-Insecure-Requests:1
User-Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537

[blairn]

It took me a day to work it out, but here it is so people don't have to follow....

   #  Access-Control-Allow-Origin: *
   function withCorsHeader(res)
     headers  = HttpCommon.headers()
     headers["Access-Control-Allow-Origin"] = "*"
     Dict(
       :headers => headers,
       :body=> res
     )
   end
   
   @app service = (
     Mux.defaults,
     page("/data", res -> withCorsHeader(getData()))
   )

[amellnik]

Ugh, not sure how I managed to not find this while flailing around. Thanks!!!