backport-url-treat-empty-port-as-default.patch

From d1bb7a564e0f92ef2081d3af8b4b7f85a307c38f Mon Sep 17 00:00:00 2001
From: Edward Thomson <ethomson@edwardthomson.com>
Date: Fri, 14 Jun 2019 17:37:22 +0100
Subject: [PATCH] url: treat empty port as default

When parsing URLs, treat an empty port (eg `http://hostname:/`) as if it
were unspecified.  RFC 3986 says:

> URI producers and normalizers SHOULD omit the port component and its
> ":" delimiter if port is empty or if its value would be the same as
> that of the scheme's default.

(Emphasis on the "SHOULD" is mine.)  This indicates that URIs MAY be
produced with an empty port and the `:` delimiter.

Thus, we stop failing if we end host parsing at the port delimiter.
---
 http_parser.c |  1 -
 test.c        | 25 +++++++++++++++++++------
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/http_parser.c b/http_parser.c
index 4896385..7e268d8 100644
--- a/http_parser.c
+++ b/http_parser.c
@@ -2326,7 +2326,6 @@ http_parse_host(const char * buf, struct http_parser_url *u, int found_at) {
     case s_http_host_v6:
     case s_http_host_v6_zone_start:
     case s_http_host_v6_zone:
-    case s_http_host_port_start:
     case s_http_userinfo:
     case s_http_userinfo_start:
       return 1;
diff --git a/test.c b/test.c
index 0140a18..54eca61 100644
--- a/test.c
+++ b/test.c
@@ -2825,6 +2825,25 @@ const struct url_test url_tests[] =
   ,.rv=0
   }
 
+, {.name="proxy empty port"
+  ,.url="http://hostname:/"
+  ,.is_connect=0
+  ,.u=
+    {.field_set=(1 << UF_SCHEMA) | (1 << UF_HOST) | (1 << UF_PATH)
+    ,.port=0
+    ,.field_data=
+      {{  0,  4 } /* UF_SCHEMA */
+      ,{  7,  8 } /* UF_HOST */
+      ,{  0,  0 } /* UF_PORT */
+      ,{ 16,  1 } /* UF_PATH */
+      ,{  0,  0 } /* UF_QUERY */
+      ,{  0,  0 } /* UF_FRAGMENT */
+      ,{  0,  0 } /* UF_USERINFO */
+      }
+    }
+  ,.rv=0
+  }
+
 , {.name="CONNECT request"
   ,.url="hostname:443"
   ,.is_connect=1
@@ -3059,12 +3078,6 @@ const struct url_test url_tests[] =
   ,.rv=1
   }
 
-, {.name="proxy empty port"
-  ,.url="http://hostname:/"
-  ,.is_connect=0
-  ,.rv=1
-  }
-
 , {.name="CONNECT with basic auth"
   ,.url="a:b@hostname:443"
   ,.is_connect=1
-- 
2.25.1