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MINOR: http: Considere empty ports as valid default ports

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In RFC3986#6.2.3, following URIs are considered as equivalent:

      http://example.com
      http://example.com/
      http://example.com:/
      http://example.com:80/

The third one is interristing because the port is empty and it is still
considered as a default port. Thus, http_get_host_port() does no longer
return IST_NULL when the port is empty. Now, a ist is returned, it points on
the first character after the colon (':') with a length of 0. In addition,
http_is_default_port() now considers an empty port as a default port,
regardless the scheme.

This patch must not be backported, if so, without the previous one ("MINOR:
h1: Consider empty port as invalid in authority for CONNECT").

(cherry picked from commit 99ade9e0da)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
This commit is contained in:
Christopher Faulet 2022-11-21 18:57:49 +01:00
parent 976f02a45d
commit 81cde62d38
1 changed files with 9 additions and 2 deletions
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11
src/http.c
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@ -479,7 +479,9 @@ const char *http_get_reason(unsigned int status)
}
/* Returns the ist string corresponding to port part (without ':') in the host
* <host> or IST_NULL if not found.
* <host>, IST_NULL if no ':' is found or an empty IST if there is no digit. In
* the last case, the result is the original ist trimed to 0. So be sure to test
* the result length before doing any pointer arithmetic.
*/
struct ist http_get_host_port(const struct ist host)
{
@ -490,8 +492,10 @@ struct ist http_get_host_port(const struct ist host)
for (ptr = end; ptr > start && isdigit((unsigned char)*--ptr););
/* no port found */
if (likely(*ptr != ':' || ptr+1 == end || ptr == start))
if (likely(*ptr != ':'))
return IST_NULL;
if (ptr+1 == end)
return isttrim(host, 0);
return istnext(ist2(ptr, end - ptr));
}
@ -503,6 +507,9 @@ struct ist http_get_host_port(const struct ist host)
*/
int http_is_default_port(const struct ist schm, const struct ist port)
{
if (!istlen(port))
return 1;
if (!isttest(schm))
return (isteq(port, ist("443")) || isteq(port, ist("80")));
else