Document that uri throws.

play-ahc-ws-standalone/src/main/scala/play/api/libs/ws/ahc/StandaloneAhcWSRequest.scala

@@ -5,7 +5,7 @@
 package play.api.libs.ws.ahc
 
 import java.io.UnsupportedEncodingException
-import java.net.URI
+import java.net.{ URI, URISyntaxException }
 import java.nio.charset.{ Charset, StandardCharsets }
 
 import akka.stream.Materializer
@@ -51,6 +51,7 @@ case class StandaloneAhcWSRequest(
 
   override def contentType: Option[String] = this.headers.get(HttpHeaders.Names.CONTENT_TYPE).map(_.head)
 
+  @throws[URISyntaxException]("If the url is invalid.")
   override lazy val uri: URI = {
     val enc = (p: String) => java.net.URLEncoder.encode(p, "utf-8")
     new java.net.URI(if (queryString.isEmpty) url else {

play-ahc-ws-standalone/src/test/scala/play/api/libs/ws/ahc/AhcWSRequestSpec.scala

@@ -4,6 +4,8 @@
 
 package play.api.libs.ws.ahc
 
+import java.net.URISyntaxException
+
 import akka.actor.ActorSystem
 import akka.stream.ActorMaterializer
 import akka.util.ByteString
@@ -16,6 +18,7 @@ import play.api.libs.ws._
 import play.shaded.ahc.io.netty.handler.codec.http.HttpHeaderNames
 import play.shaded.ahc.org.asynchttpclient.Realm.AuthScheme
 import play.shaded.ahc.org.asynchttpclient.{ Param, SignatureCalculator, Request => AHCRequest }
+
 import scala.collection.JavaConverters._
 import scala.concurrent.duration._
 
@@ -106,6 +109,13 @@ class AhcWSRequestSpec extends Specification with Mockito with AfterAll with Def
 
     }
 
+    "uri should not throw" in {
+      withClient { client =>
+        val req = client.url("https://github.com/playframework/play-ws/issues/267/?pipe=|")
+        req.uri must not(throwAn[URISyntaxException])
+      }
+    }.pendingUntilFixed("issue #267")
+
   }
 
   "For Cookies" in {