proxy_pass based on $arg_lang and $http_accept_language

wandererc · 2018-10-13T02:53:02+00:00

I found another blog says that using "next(res)==nil" rather "#res" to see if res is empty or not.在 2018年10月12&#x65E...

proxy_pass based on $arg_lang and $http_accept_language

wandererc

Hi all,

I am new to Openresty and Lua.

I would like to send some traffic to upstream servers, this is my current config: https://dpaste.de/Ch21

I see the debug messages in the error log, but at the same time that $pool is an empty string https://dpaste.de/Ytyn

Why it is not set by rewrite_by_lua_block, or if it was set, what happened with the value after?

Should I use a completely another approach? :)

this config is running in a container: openresty/openresty:1.13.6.2-stretch

Thanks for any help,

Levente

wandererc

Hi,

I reduced the Lua code: https://dpaste.de/71OS

It responds 200 for the first time, if I see it correctly: https://dpaste.de/YbVG

Am I right that from the 2nd GET, the requested URL does not contain a _lang_ parameter and that causes the logged error messages?

On Friday, October 12, 2018 at 8:53:03 PM UTC+2, Levente László wrote:

Hi all,

I am new to Openresty and Lua.
I would like to send some traffic to upstream servers, this is my current config: https://dpaste.de/Ch21

I see the debug messages in the error log, but at the same time that $pool is an empty string https://dpaste.de/Ytyn

Why it is not set by rewrite_by_lua_block, or if it was set, what happened with the value after?
Should I use a completely another approach? :)

this config is running in a container: openresty/openresty:1.13.6.2-stretch

Thanks for any help,
Levente

jim.robinson

That's how I am reading it. From the logging you gave it appears as though the original proxied request return a page that referenced "/example/vendor.min.1-20-445.css" and since that doesn't contain your parameter the $pool ends without a meaningful value.

On Saturday, October 13, 2018 at 9:22:56 AM UTC-7, Levente László wrote:

Hi,

I reduced the Lua code: https://dpaste.de/71OS

It responds 200 for the first time, if I see it correctly: https://dpaste.de/YbVG

Am I right that from the 2nd GET, the requested URL does not contain a _lang_ parameter and that causes the logged error messages?

On Friday, October 12, 2018 at 8:53:03 PM UTC+2, Levente László wrote:
Hi all,

I am new to Openresty and Lua.
I would like to send some traffic to upstream servers, this is my current config: https://dpaste.de/Ch21

I see the debug messages in the error log, but at the same time that $pool is an empty string https://dpaste.de/Ytyn

Why it is not set by rewrite_by_lua_block, or if it was set, what happened with the value after?
Should I use a completely another approach? :)

this config is running in a container: openresty/openresty:1.13.6.2-stretch

Thanks for any help,
Levente

378255237

2018/10/13 15:18:56 [error] 8#8: *1 invalid URL prefix in "http://", client: 123.123.1.1, server: lang-param.com, request: "GET /example/vendor.min.1-20-445.css HTTP/1.1", host: "lang-param.com", referrer: "https://lang-param.com/example/index.html?lang=hu-hu"

1、get /example/vendor.min.1-20-445.css ,the url no args of lang so the ngx.var.pool = ""。( you can set default eg: set $pool 'youpool';)

2、see the http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_pass

Parameter value can contain variables. In this case, if an address is specified as a domain name, the name is searched among the described server groups, and, if not found, is determined using aresolver.

在 2018年10月13日星期六 UTC+8上午2:53:03，Levente László写道：

Hi all,

I am new to Openresty and Lua.
I would like to send some traffic to upstream servers, this is my current config: https://dpaste.de/Ch21

I see the debug messages in the error log, but at the same time that $pool is an empty string https://dpaste.de/Ytyn

Why it is not set by rewrite_by_lua_block, or if it was set, what happened with the value after?
Should I use a completely another approach? :)

this config is running in a container: openresty/openresty:1.13.6.2-stretch

Thanks for any help,
Levente

wandererc

Thanks for every reply.

It was working as expected, I just misinterpreted the logs before

On Sun, 14 Oct 2018 at 13:01, <3782...@qq.com> wrote:

2018/10/13 15:18:56 [error] 8#8: *1 invalid URL prefix in "http://", client: 123.123.1.1, server: lang-param.com, request: "GET /example/vendor.min.1-20-445.css HTTP/1.1", host: "lang-param.com", referrer: "https://lang-param.com/example/index.html?lang=hu-hu"

1、get /example/vendor.min.1-20-445.css ,the url no args of lang so the ngx.var.pool = ""。( you can set default eg: set $pool 'youpool';)
2、see the http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_pass
Parameter value can contain variables. In this case, if an address is specified as a domain name, the name is searched among the described server groups, and, if not found, is determined using aresolver.

在 2018年10月13日星期六 UTC+8上午2:53:03，Levente László写道：
Hi all,

I am new to Openresty and Lua.
I would like to send some traffic to upstream servers, this is my current config: https://dpaste.de/Ch21

I see the debug messages in the error log, but at the same time that $pool is an empty string https://dpaste.de/Ytyn

Why it is not set by rewrite_by_lua_block, or if it was set, what happened with the value after?
Should I use a completely another approach? :)

this config is running in a container: openresty/openresty:1.13.6.2-stretch

Thanks for any help,
Levente

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