Add HTTPD-INPUT-RESPONSE response values.

scheme/httpd/core.scm

@@ -167,10 +167,14 @@
 	 (lambda ()
 	   (let ((initial-req (parse-http-request sock options)))
 	     (let redirect-loop ((req initial-req))
-	       (let ((response ((httpd-options-request-handler options)
-				(http-url-path (request-url req))
-				req)))
+	       (let response-loop ((response ((httpd-options-request-handler options)
+					      (http-url-path (request-url req))
+					      req)))
 		 (cond
+		  ((input-response? response)
+		   (response-loop
+		    ((input-response-body-maker response)
+		     (socket:inport sock))))
 		  ((nph-response? response)
 		   (values req response))
 		  ((eq? (response-code response) (status-code redirect))

scheme/httpd/response.scm

@@ -24,6 +24,11 @@
   nph-response?
   (body nph-response-body))
 
+(define-record-type http-input-response :http-input-response
+  (make-input-response body-maker)
+  input-response?
+  (body-maker input-response-body-maker))
+
 (define-record-type http-writer-body :http-writer-body
   (make-writer-body proc)
   writer-body?

scheme/packages.scm

@@ -284,6 +284,9 @@
 	  make-nph-response nph-response?
 	  nph-response-body
 
+	  make-input-response input-response?
+	  input-response-body-maker
+
 	  make-writer-body writer-body?
 	  make-reader-writer-body reader-writer-body?
 	  make-redirect-body redirect-body? redirect-body-location