Akka Http Client - Encoding issue

[Srinaath Thyagarajan]

I am trying to invoke a Rest API using akka http client using below code.

            val httpRequest = HttpRequest(
              method  = HttpMethods.GET,


          uri ="https://example.com/customers/~/profiles/dj2bQryHPCj4IVrc48xTPD%2Bhswk%2FqNWx%2BLuUA0G2T6GLnyBVD6wC231IjgDBYJnt/preferences",

              headers = List(Accept(MediaRange(MediaTypes.`application/json`.withParams(Map("v" → "3")))),
                RawHeader("Content-Type", "application/json;v=3"),
                RawHeader("Api-Key", "XYZ")
              )
            )

Http().singleRequest(httpRequest, GatewayHelper.connectionContext)

Before the call goes out, when i check the httprequest.uri (through debugger), there is a partial uri decoding that is happening (%2B changed to +)      "https://example.com/customers/~/profiles/dj2bQryHPCj4IVrc48xTPD+hswk%2FqNWx+LuUA0G2T6GLnyBVD6wC231IjgDBYJnt/preferences"

Because of this the API is returning an error. Unfortunately, there are bunch or APIs that has this type of path variable . So not able to invoke using akka-http . 

I also tried setting the parsing mode to Relaxed hoping that it would not tamper the path variable, but it didnt help either.

 Uri.apply("https://example.com/customers/~/profiles/dj2bQryHPCj4IVrc48xTPD%2Bhswk%2FqNWx%2BLuUA0G2T6GLnyBVD6wC231IjgDBYJnt/preferences", Uri.ParsingMode.Relaxed)

So, Is there option where we can make akka no modify this before making the httprequest? 

[André]

Hi Srinaath,

does it work with 

  "https://example.com/customers/~/profiles/dj2bQryHPCj4IVrc48xTPD hswk%2FqNWx LuUA0G2T6GLnyBVD6wC231IjgDBYJnt/preferences"

?

Akka should replace the spaces with a "+" while a "+" as input will get encoded as "%2B".

HTH

André

Srinaath

[Srinaath Thyagarjan]

Hi Andre,

Thanks for your response. I will try that and see how that works.

Thanks,
Srinaath

[André]

Hi Srinaath,

I was wrong. There's no way to let the renderer produce such a URI on the wire. "+" doesn't get percent encoded and "%2b" gets double encoded as "%252b". See [1] for an explanation.

However, there's Raw-Request-Uri which you can use. See [2] for an example.

[1] https://github.com/spray/spray/issues/803

[2] https://github.com/akka/akka-http/blob/a6245b606eec7b8ba77a2dbc96cdc388de5450d6/akka-http-core/src/test/scala/akka/http/impl/engine/rendering/RequestRendererSpec.scala#L311-L319

Cheers

André