Merge pull request #16206 from spray/w/16175-regard-raw-request-uri-header-setting

=htc #16175 regard `raw-request-uri-header` setting

akka-http-core/src/main/scala/akka/http/engine/parsing/HttpRequestParser.scala

@@ -110,8 +110,12 @@ private[http] class HttpRequestParser(_settings: ParserSettings,
                   hostHeaderPresent: Boolean, closeAfterResponseCompletion: Boolean): StateResult =
     if (hostHeaderPresent || protocol == HttpProtocols.`HTTP/1.0`) {
       def emitRequestStart(createEntity: Source[ParserOutput.RequestOutput] ⇒ RequestEntity,
-                           headers: List[HttpHeader] = headers) =
+                           headers: List[HttpHeader] = headers) = {
-        emit(ParserOutput.RequestStart(method, uri, protocol, headers, createEntity, closeAfterResponseCompletion))
+        val allHeaders =
+          if (rawRequestUriHeader) `Raw-Request-URI`(new String(uriBytes, HttpCharsets.`US-ASCII`.nioCharset)) :: headers
+          else headers
+        emit(ParserOutput.RequestStart(method, uri, protocol, allHeaders, createEntity, closeAfterResponseCompletion))
+      }
 
       teh match {
         case None ⇒

akka-http-core/src/test/scala/akka/http/engine/parsing/RequestParserSpec.scala

@@ -228,6 +228,23 @@ class RequestParserSpec extends FreeSpec with Matchers with BeforeAndAfterAll {
         closeAfterResponseCompletion shouldEqual Seq(false)
       }
 
+      "support `rawRequestUriHeader` setting" in new Test {
+        override protected def newParser: HttpRequestParser = new HttpRequestParser(parserSettings, rawRequestUriHeader = true)()
+
+        """GET /f%6f%6fbar?q=b%61z HTTP/1.1
+          |Host: ping
+          |Content-Type: application/pdf
+          |
+          |""" should parseTo(
+          HttpRequest(
+            GET,
+            "/foobar?q=baz",
+            List(
+              `Raw-Request-URI`("/f%6f%6fbar?q=b%61z"),
+              Host("ping")),
+            HttpEntity.empty(`application/pdf`)))
+      }
+
       "reject a message chunk with" - {
         val start =
           """PATCH /data HTTP/1.1