[PATCH] $request_scheme variable

[Chris Branch]

Hi, just giving this patch some birthday bumps.

> On 27 Feb 2017, at 11:58, Chris Branch via nginx-devel <nginx-devel at nginx.org> wrote:
> 
> # HG changeset patch
> # User Chris Branch <cbranch at cloudflare.com>
> # Date 1488195909 0
> #      Mon Feb 27 11:45:09 2017 +0000
> # Node ID 05f555d65a33ebf005fedc569fb52eba3758e1d7
> # Parent  87cf6ddb41c216876d13cffa5e637a61b159362c
> $request_scheme variable.
> 
> Contains the URI scheme supplied by the client. If no scheme supplied,
> equivalent to $scheme.
> 
> Scheme can be supplied by the client in two ways:
> 
> * HTTP/2 :scheme pseudo-header.
> * HTTP/1 absolute URI in request line.
> 
> diff -r 87cf6ddb41c2 -r 05f555d65a33 src/http/ngx_http_variables.c
> --- a/src/http/ngx_http_variables.c	Fri Feb 17 17:01:27 2017 +0300
> +++ b/src/http/ngx_http_variables.c	Mon Feb 27 11:45:09 2017 +0000
> @@ -105,6 +105,8 @@
>     ngx_http_variable_value_t *v, uintptr_t data);
> static ngx_int_t ngx_http_variable_request_id(ngx_http_request_t *r,
>     ngx_http_variable_value_t *v, uintptr_t data);
> +static ngx_int_t ngx_http_variable_request_scheme(ngx_http_request_t *r,
> +    ngx_http_variable_value_t *v, uintptr_t data);
> static ngx_int_t ngx_http_variable_status(ngx_http_request_t *r,
>     ngx_http_variable_value_t *v, uintptr_t data);
> 
> @@ -288,6 +290,10 @@
>       ngx_http_variable_request_id,
>       0, 0, 0 },
> 
> +    { ngx_string("request_scheme"), NULL,
> +      ngx_http_variable_request_scheme,
> +      0, 0, 0 },
> +
>     { ngx_string("status"), NULL,
>       ngx_http_variable_status, 0,
>       NGX_HTTP_VAR_NOCACHEABLE, 0 },
> @@ -2158,6 +2164,24 @@
> 
> 
> static ngx_int_t
> +ngx_http_variable_request_scheme(ngx_http_request_t *r,
> +    ngx_http_variable_value_t *v, uintptr_t data)
> +{
> +    if (r->schema_start) {
> +        v->len = r->schema_end - r->schema_start;
> +        v->valid = 1;
> +        v->no_cacheable = 0;
> +        v->not_found = 0;
> +        v->data = r->schema_start;
> +
> +        return NGX_OK;
> +    }
> +
> +    return ngx_http_variable_scheme(r, v, data);
> +}
> +
> +
> +static ngx_int_t
> ngx_http_variable_connection(ngx_http_request_t *r,
>     ngx_http_variable_value_t *v, uintptr_t data)
> {
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