From 4dbfd149c2ae2361fa7d1da633bdda6992902f7f Mon Sep 17 00:00:00 2001
From: XieHan <XieHan@sogou-inc.com>
Date: Thu, 28 Jan 2021 23:39:18 +0800
Subject: [PATCH] Http redirect supports relative URI. (RFC 7231)

---
 src/factory/HttpTaskImpl.cc | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/factory/HttpTaskImpl.cc b/src/factory/HttpTaskImpl.cc
index bb0aae56..8baba64c 100644
--- a/src/factory/HttpTaskImpl.cc
+++ b/src/factory/HttpTaskImpl.cc
@@ -277,6 +277,19 @@ bool ComplexHttpTask::redirect_url(HttpResponse *client_resp)
 			return false;
 		}
 
+		if (url[0] == '/')
+		{
+			if (url[1] != '/')
+			{
+				if (uri_.port)
+					url = ':' + (uri_.port + url);
+
+				url = "//" + (uri_.host + url);
+			}
+
+			url = uri_.scheme + (':' + url);
+		}
+
 		URIParser::parse(url, uri_);
 		return true;
 	}