File not found with nginx and php - php

Question

I try to run node js and php on the same domain with nginx. However the location for php ("/ajax") does not work. I always get the message "File not found.". The nginx logs print
The URL is http://localhost:8085/ajax so far, the scripts are located at /var/www/public
The folder /ajax does NOT exist (none of the paths do, as everthing shall be redirected to /var/www/public/index.php)
nginx | 2017/08/27 20:47:48 [error] 6#6: *6 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: 172.23.0.1, server: localhost, request: "GET /ajax HTTP/1.1", upstream: "fastcgi://172.23.0.4:9000", host: "localhost:8085"
nginx | 172.23.0.1 - - [27/Aug/2017:20:47:48 +0000] "GET /ajax HTTP/1.1" 404 27 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36" "-"
This is my configuration, what do I have to change?
upstream react {
server react:3000;
keepalive 8;
}
server {
listen 0.0.0.0:80;
server_name localhost;
location / {
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://react;
proxy_redirect off;
}
location /ajax {
index index.php index.html;
root /var/www/public;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass app:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_path_info;
}
client_max_body_size 5m;
}
I tried
fastcgi_param SCRIPT_FILENAME /var/www/public$fastcgi_script_name;
as suggested in some threads, but that does not work

Answer 1

So I have trying to work on your Issue for last 3 days, to get a better and deeper understanding of FASTCGI. I put a logger between and NGINX and FPM, and that helped me better understand the interactions. Below is the config that I believe should work for you
Edit-1
Updated config after resolving issue on chat
upstream react {
server react:3000;
keepalive 8;
}
map $fastcgi_script_name $fastcgi_script_name_fcgi {
"~*/ajax/(?P<rest_url>.*)$" /$rest_url;
default $fastcgi_script_name;
}
map $request_uri $request_uri_fcgi {
"~*/ajax/(?P<rest_url>.*)$" /$rest_url;
default $request_uri;
}
map $document_uri $document_uri_fcgi {
"~*/ajax/(?P<rest_url>.*)$" /$rest_url;
default $document_uri_fcgi;
}
server {
listen 0.0.0.0:80;
server_name localhost;
location / {
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://react;
proxy_redirect off;
}
location /ajax {
alias /var/www/public;
try_files $uri #php;
}
location #php {
fastcgi_split_path_info ^/ajax/(.+\.php)(/.+)$;
fastcgi_pass fpm:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_NAME /index.php;
fastcgi_param REQUEST_URI $request_uri_fcgi;
fastcgi_param DOCUMENT_URI $document_uri_fcgi;
fastcgi_param SCRIPT_FILENAME /var/www/public/index.php;
}
client_max_body_size 5m;
}
So the basic idea is to replace /ajax from document_root using the alias directive. Then to override the request_uri and other parameters so the correct urls reach the PHP code for route resolution.
Below is part of what my php script receives when I call http://vm/ajax/router.php?x=2
{
"COOKIES": null,
"GET": {
"x": "2"
},
"POST": [],
"REQUEST": {
"x": "2"
},
"HEADERS": null,
"SERVER": {
"HOME": "/var/www",
"SCRIPT_FILENAME": "/var/www/html/router.php",
"DOCUMENT_ROOT": "/var/www/html",
"DOCUMENT_URI": "/router.php",
"REQUEST_URI": "/router.php?x=2",
"SCRIPT_NAME": "/router.php",
"CONTENT_LENGTH": "",
"CONTENT_TYPE": "",
"REQUEST_METHOD": "GET",
"QUERY_STRING": "x=2",
"FCGI_ROLE": "RESPONDER",
"PHP_SELF": "/router.php",
"argv": [
"x=2"
],
"argc": 1
}
}
As you can see nothing gets /ajax

Answer 2

The current configuration works for me, however /ajax is passed to php-fpm. I was not able to get rid of the /ajax prefix in all variables like REQUEST_URI
upstream react {
server react:3000;
keepalive 8;
}
server {
listen 0.0.0.0:80;
server_name localhost;
location / {
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://react;
proxy_redirect off;
}
location /ajax {
try_files $uri $uri/ /index.php?$query_string;
}
location ~ \.php$ {
fastcgi_pass app:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/public$fastcgi_script_name;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param PATH_INFO $fastcgi_path_info;
}
client_max_body_size 5m;
}