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package cask.endpoints
import java.io.{ByteArrayOutputStream, InputStream, OutputStream, OutputStreamWriter}
import cask.internal.Util
import cask.router.HttpEndpoint
import cask.model.Response.DataCompanion
import cask.model.{Request, Response}
import cask.router.{ArgReader, Result}
import collection.JavaConverters._
sealed trait JsReader[T] extends ArgReader[ujson.Value, T, cask.model.Request]
object JsReader{
implicit def defaultJsReader[T: upickle.default.Reader] = new JsReader[T]{
def arity = 1
def read(ctx: cask.model.Request, label: String, input: ujson.Value): T = {
val reader = implicitly[upickle.default.Reader[T]]
upickle.default.read[T](input)(reader)
}
}
implicit def paramReader[T: ParamReader] = new JsReader[T] {
override def arity = 0
override def read(ctx: cask.model.Request, label: String, v: ujson.Value) = {
implicitly[ParamReader[T]].read(ctx, label, Nil)
}
}
}
trait JsonData extends Response.Data
object JsonData extends DataCompanion[JsonData]{
implicit class JsonDataImpl[T: upickle.default.Writer](t: T) extends JsonData{
def write(out: OutputStream) = {
val writer = new OutputStreamWriter(out)
implicitly[upickle.default.Writer[T]].write(new ujson.BaseRenderer(writer), t)
writer.flush()
}
}
}
class postJson(val path: String, override val subpath: Boolean = false)
extends HttpEndpoint[Response[JsonData], ujson.Value]{
val methods = Seq("post")
type InputParser[T] = JsReader[T]
override type OuterReturned = Result[Response.Raw]
def wrapFunction(ctx: Request,
delegate: Delegate): Result[Response.Raw] = {
val obj = for{
str <-
try {
val boas = new ByteArrayOutputStream()
Util.transferTo(ctx.exchange.getInputStream, boas)
Right(new String(boas.toByteArray))
}
catch{case e: Throwable => Left(cask.model.Response(
"Unable to deserialize input JSON text: " + e + "\n" + Util.stackTraceString(e),
statusCode = 400
))}
json <-
try Right(ujson.read(str))
catch{case e: Throwable => Left(cask.model.Response(
"Input text is invalid JSON: " + e + "\n" + Util.stackTraceString(e),
statusCode = 400
))}
obj <-
try Right(json.obj)
catch {case e: Throwable => Left(cask.model.Response(
"Input JSON must be a dictionary",
statusCode = 400
))}
} yield obj.toMap
obj match{
case Left(r) => Result.Success(r.map(Response.Data.StringData))
case Right(params) => delegate(params)
}
}
def wrapPathSegment(s: String): ujson.Value = ujson.Str(s)
}
class getJson(val path: String, override val subpath: Boolean = false)
extends HttpEndpoint[Response[JsonData], Seq[String]]{
val methods = Seq("get")
type InputParser[T] = QueryParamReader[T]
override type OuterReturned = Result[Response.Raw]
def wrapFunction(ctx: Request, delegate: Delegate): Result[Response.Raw] = {
delegate(WebEndpoint.buildMapFromQueryParams(ctx))
}
def wrapPathSegment(s: String) = Seq(s)
}
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