URL-decode all inputs

[ocramz]

• parameters : URL-decode the textual params coming from the GET query or POST body #170
• (form) bodies : see commit 2a7db35 and PR Add for decoding x-www-form-urlencoded data #216
• pattern matching doesn't work against url-encoded path segments Routing does not match url-encoded path #262

related : #8

closes #170

[ocramz]

NB remember to import http-api-data for the decoding functionality : https://hackage.haskell.org/package/http-api-data

[jfraudeau]

Regarding path segment inputs, they are already decoded by WAI/Warp in Request.pathInfo. Same goes for queryParams

I believe #262 is fixed by #302

[pbrinkmeier]

I just created my first PR at #392 :)

Basically path segments, query parameters and form data are handled by warp and therefore already decoded when they are accessed by scotty actions. When using warp, path segements are ultimately handled by Network.HTTP.Types.decodePathSegmentsand parameters are handled by Network.HTTP.Types.parseQuery. Both of those call Network.HTTP.Types.urlDecode internally. I added some tests for that.

And like the other PR, I added a formData action that can decode records with FormData instances from http-api-data.