How to locate which stage calls 307

The server is broken

Question

In a request, ngx.status can only be captured as 307 in the header_filter_by_lua_file stage, and this request cannot be obtained in body_filter_by_lua.

Environment:

PHP project, with the following configuration, no SSL, no relevant 307 redirect configuration:

    location ~ [^/]\.php(/|$)
    {
        try_files $uri =404;
        fastcgi_pass  unix:/tmp/php-cgi-74.sock;
        fastcgi_index index.php;
        include fastcgi.conf;
        include pathinfo.conf;
    }

nginx version: nginx/1.24.0
built by gcc 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) 
built with OpenSSL 1.1.1q  5 Jul 2022
TLS SNI support enabled
configure arguments: --user=www --group=www --prefix=/www/server/nginx --add-module=/www/server/nginx/src/ngx_devel_kit --add-module=/www/server/nginx/src/lua_nginx_module --add-module=/www/server/nginx/src/ngx_cache_purge --with-openssl=/www/server/nginx/src/openssl --with-pcre=pcre-8.43 --with-http_v2_module --with-stream --with-stream_ssl_module --with-stream_ssl_preread_module --with-http_stub_status_module --with-http_ssl_module --with-http_image_filter_module --with-http_gzip_static_module --with-http_gunzip_module --with-ipv6 --with-http_sub_module --with-http_flv_module --with-http_addition_module --with-http_realip_module --with-http_mp4_module --add-module=/www/server/nginx/src/ngx_http_substitutions_filter_module-master --with-ld-opt=-Wl,-E --with-cc-opt=-Wno-error --with-http_dav_module --add-module=/www/server/nginx/src/nginx-dav-ext-module

I have a few questions:

1. Why can't 307 capture this request in body_fileter_by_lua?

2. Can it be changed to 200 at this stage?

3. If it cannot be changed to 200, how can I better locate at which stage my nginx has a 307 jump.

Start with the reported nginx 1.24.0 configuration and the distinction between header_filter_by_lua_file and body_filter_by_lua. Trace where the 307 status is observed and review the three questions about changing the status and locating its source. Done means documenting the stage responsible and whether changing it to 200 is supported.