ngx.req诸多方法不能使用, 比如 get_headers, get_method等

电脑

安装版本:

nginx version: nginx/1.23.4
lua version: Lua 5.4.5  Copyright (C) 1994-2023 Lua.org, PUC-Rio
luajit version: LuaJIT 2.1.0-beta3 -- Copyright (C) 2005-2022 Mike Pall. https://luajit.org/(使用的是openresty中的版本)
openssl verions: 1.1.1t
pcre version: 1.x

nginx需要的模块(从openresty的 github 中下载, 存放于 /Users/smile/tools/nginx-modules目录下)：

lua-nginx-module(master分支)
ngx_devel_kit(master分支)
lua-resty-core(master分支, 需要 `make` 和 `make install` 到`/Users/smile/tools/nginx-1.23.4/restry`目录)
lua-resty-lrucache(master分支, 需要 `make` 和  `make install` 到`/Users/smile/tools/nginx-1.23.4/restry`目录)

ps: 本人使用nginx源码编译的方式集成 lua, 而非 openresty或brew的方式。

安装完lua、luajit、openssl、pcre 后编译nginx(nginx下载目录为: /Users/smile/tools/nginx-1.23.4):

./configure --prefix=/usr/local/nginx \
--with-http_ssl_module \
--with-http_stub_status_module \
--add-module=/Users/smile/tools/nginx-modules/lua-nginx-module-master \
--add-module=/Users/smile/tools/nginx-modules/ngx_devel_kit-master

make
make install

安装成功后配置 nginx.conf

http {
   ...
   
  # 添加 lua_package_path
 lua_package_path '/Users/smile/tools/nginx-1.23.4/restry/lib/lua/?.lua;;';
 lua_package_cpath '/Users/smile/tools/nginx-1.23.4/restry/lib/lua/?.so;;';
 
...

server {
    location /testLua {
        default_type 'text/plain';
        # content_by_lua 'ngx.say("hello, lua")';
        content_by_lua_block {
            ngx.say('ngx.req.raw_header: ', ngx.req.raw_header(), '<br/>'). -- 这个可以运行, 输出请求头
            ngx.say("ngx.req.http_version: ", ngx.req.http_version(), "<br/>") -- 这个可以运行(结果: ngx.req.http_version: 1.1)
            ngx.say("ngx.req.get_headers: ", ngx.req.get_headers(), "<br/>") -- 此处开始报错
            ngx.say("ngx.req.get_method: ", ngx.req.get_method(), "<br/>")  -- 此处开始报错
            ngx.say("hello, lua")
        }
    }

 ...
}

...

}

其中: get_headers 和 get_method两个方法运行报错, 错误如下:

stack traceback:
coroutine 0:
	[C]: in function 'error'
	...tools/nginx-1.23.4/restry/lib/lua/resty/core/request.lua:131: in function 'get_headers'
	content_by_lua(/Users/smile/tools/nginx-1.23.4/lua.conf:18):2: in function <content_by_lua(/Users/smile/tools/nginx-1.23.4/lua.conf:18):1>, client: 127.0.0.1, server: localhost, request: "GET /testLua HTTP/1.1", host: "localhost:9999"
2023/05/11 10:53:17 [error] 3358#0: *507 lua entry thread aborted: runtime error: ...tools/nginx-1.23.4/restry/lib/lua/resty/core/request.lua:292: no request found

stack traceback:
coroutine 0:
	[C]: in function 'error'
	...tools/nginx-1.23.4/restry/lib/lua/resty/core/request.lua:292: in function 'get_method'
	content_by_lua(/Users/smile/tools/nginx-1.23.4/lua.conf:18):2: in function <content_by_lua(/Users/smile/tools/nginx-1.23.4/lua.conf:18):1>, client: 127.0.0.1, server: localhost, request: "GET /testLua HTTP/1.1", host: "localhost:9999"

翻看源码(/Users/smile/tools/nginx-1.23.4/restry/lib/lua/resty/core/request.lua)，找到相应地方:

• get_headers 错误地方

• get_methods 错误地方

请帮忙看一下为什么ngx.req中好多方法不能使用,是不是我的安装有问题还是什么, 对了不要推荐我安装openresty，因为我一开始用的openresty, 结果这文档看的我脑袋疼，半天也没安装成功!谢谢～～

Start with the reported content_by_lua_block in nginx.conf and the corresponding get_headers and get_method paths in resty/lib/lua/resty/core/request.lua. Reproduce the request with the listed nginx, LuaJIT, lua-nginx-module, and lua-resty-core versions, then verify whether the build and request context match the module requirements. Done means identifying the installation or usage mismatch, or confirming a reproducible module defect.