History log of /unit/src/nxt_http_variables.c (Results 1 – 7 of 7)
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# 2158:bbc15554fb36 06-May-2022 Andrew Clayton

Var: added a $dollar variable that translates to a '$'.

Allow $dollar (or ${dollar}) to translate to a literal $ to allow
support for sub-delimiters in URIs.

It is possible to have URLs like

htt

Var: added a $dollar variable that translates to a '$'.

Allow $dollar (or ${dollar}) to translate to a literal $ to allow
support for sub-delimiters in URIs.

It is possible to have URLs like

https://example.com/path/15$1588/9925$2976.html

and thus it would be useful to be able to specify them in various bits
of the unit config such as the location setting.

However this hadn't been possible due to $ being used to denote
variables for substitution. E.g $host.

As was noted in the below GitHub issue it was suggested by @VBart to
use $sign to represent a literal $, however I feel $dollar is more
appropriate so we have a variable named after the thing it represents,
also @tippexs found[0] that &dollar is used in HTML to represent a $, so
there is some somewhat related precedent.

(The other idea to use $$ was rejected in my original pull-request[1]
for this issue.)

This means the above URL could be specified as

https://example.com/path/15${dollar}1588/9925${dollar}2976.html

in the unit config.

This is done by adding a variable called 'dollar' which is loaded into
the variables hash table which translates into a literal $.

This is then handled in nxt_var_next_part() where variables are parsed
for lookup and $dollar is set for substitution by a literal '$'. Actual
variable substitution happens in nxt_var_query_finish().

[0]: https://github.com/nginx/unit/pull/693#issuecomment-1130412323
[1]: https://github.com/nginx/unit/pull/693

Closes: https://github.com/nginx/unit/issues/675

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# 2149:7a53238e050d 13-Jul-2022 Zhidao HONG

HTTP: added more variables.

This commit adds the following variables:
$remote_addr, $time_local, $request_line, $status,
$body_bytes_sent, $header_referer, $header_user_agent.


# 2147:7bf58b1b18c4 13-Jul-2022 Zhidao HONG

Var: dynamic variables support.

This commit adds the variables $arg_NAME, $header_NAME, and $cookie_NAME.


# 2124:6e74a08303ad 02-Jun-2022 Zhidao HONG

Summary: Var: removing all async stuff.

No functional changes.


Revision tags: 1.27.0-1, 1.27.0
# 2110:048281cd3d73 26-May-2022 Alejandro Colomar

Var: Added $request_uri (as in NGINX).

This supports a new variable $request_uri that contains the path
and the query (See RFC 3986, section 3). Its contents are percent
encoded. This is useful fo

Var: Added $request_uri (as in NGINX).

This supports a new variable $request_uri that contains the path
and the query (See RFC 3986, section 3). Its contents are percent
encoded. This is useful for example to redirect HTTP to HTTPS:

{
"return": "301",
"location": "https://$host$request_uri"
}

When <http://example.com/foo%23bar?baz> is requested, the server
redirects to <https://example.com/foo%23bar?baz>.

===

Testing:

//diff --git a/src/nxt_http_return.c b/src/nxt_http_return.c
//index 82c9156..adeb3a1 100644
//--- a/src/nxt_http_return.c
//+++ b/src/nxt_http_return.c
//@@ -196,6 +196,7 @@ nxt_http_return_send_ready(nxt_task_t *task,
void *obj, void *data)
// field->value = ctx->encoded.start;
// field->value_length = ctx->encoded.length;
// }
//+ fprintf(stderr, "ALX: target[%1$i]: <%2$.*1$s>\n",
(int)r->target.length, r->target.start);
//
// r->state = &nxt_http_return_send_state;
//

{
"listeners": {
"*:81": {
"pass": "routes/ru"
}
},

"routes": {
"ru": [{
"action": {
"return": 301,
"location": "$request_uri"
}
}]
}
}

$ curl -i http://localhost:81/*foo%2Abar?baz#arg
HTTP/1.1 301 Moved Permanently
Location: /*foo%2Abar?baz
Server: Unit/1.27.0
Date: Mon, 30 May 2022 16:04:30 GMT
Content-Length: 0

$ sudo cat /usr/local/unit.log | grep ALX
ALX: target[15]: </*foo%2Abar?baz>

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Revision tags: 1.26.1-1, 1.26.1, 1.26.0-1, 1.26.0, 1.25.0-1, 1.25.0, 1.24.0-1, 1.24.0, 1.23.0-1, 1.23.0, 1.22.0-1, 1.22.0, 1.21.0-1, 1.21.0, 1.20.0-1, 1.20.0
# 1587:0bef0a02c8c4 28-Aug-2020 Valentin Bartenev

Vars: added $host.

This closes #407 issue on GitHub.


Revision tags: 1.19.0-1, 1.19.0
# 1563:d32bc428f46b 12-Aug-2020 Valentin Bartenev

Basic variables support.