An error with the docs of $host

Server NGINX
1

Hi,

In the docs of $host at
Module ngx_http_core_module, it
says:

$host
Host request header field, or the server name matching a request if this
field is not present

It’s not right with the host header like: www.example.com:1234. The
$host
variable always strips the port.

2

On Fri, Nov 30, 2012 at 11:18:15AM +0800, 姚伟斌 wrote:

variable always strips the port.
How’s this instead?

%%%
Index: xml/en/docs/http/ngx_http_core_module.xml

— xml/en/docs/http/ngx_http_core_module.xml (revision 775)
+++ xml/en/docs/http/ngx_http_core_module.xml (working copy)
@@ -2754,8 +2754,10 @@

$host

-Host request header field,
-or the server name matching a request if this field is not present
+in this order of precedence:
+host from the request line, or
+host from the Host request header field,
+or the server name matching a request

$hostname
%%%

3

Hi Ruslan,

Most of the content is fine for me. Could you add a line like that the
variable $host exclude the port explicitly? I know the host should mean
the
server name, not include the port. It just confuses me when I use the
directive like this:

proxy_set_header Host $host;

But the port is missing. Maybe I shoud use the $http_host instead.

Thanks.

2012/11/30 Ruslan E. [email protected]

4

On Fri, Nov 30, 2012 at 06:05:42PM +0800, 姚伟斌 wrote:

Hi Ruslan,

Most of the content is fine for me. Could you add a line like that the
variable $host exclude the port explicitly? I know the host should mean the
server name, not include the port.

: GET http://example.com:12345/uri HTTP/1.1
: Host: example.net:54321

results in $host being set to “example.com”, while

: GET /uri HTTP/1.1
: Host: example.net:54321

results in $host being set to “example.net”, as required by
RFC 2616 - Hypertext Transfer Protocol -- HTTP/1.1

If I say about port stripping in case #2, should I say about
requestURI stripping to extract the “host” part? I’d like
to avoid detailing it too much, and in my opinion “host from
the …” fits both cases.

It just confuses me when I use the
directive like this:

proxy_set_header Host $host;

But the port is missing.

That is understood. The previous description was incorrect.
Thanks for noticing.

Maybe I shoud use the $http_host instead.

It depends on what you need.

2012/11/30 Ruslan E. [email protected]
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