File not found with nginx and 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

Post the URL that you have accessed and also the folder where the file should have it. Also remember that ajax with go as a path in that url, so if your folder doesn't have ajax the script to run will not be found and hence the error — Tarun Lalwani

Tarun Lalwani Tarun Lalwani · Accepted Answer · 2017-08-29T06:18:26

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

File not found with nginx and php

2 Answers