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Berlin
Asked: 2017-07-25 16:10:08 +0800 CST

nginx serve a different file name from local server if url/file does not exist

  • 772

Is there a way if file not exist to server another app-*.js file in other folder, example:

Go to URL: http://www.example.com/assets/build/app/app-48fee50a26.js

I am getting the following error message:

[error] 17788#17788: *1 open() "/var/app/assets/build/app/app-48fee50a26.js" failed (2: No such file or directory), client: , server: , request: "GET /assets/build/app/app-48fee50a26.js HTTP/1.1", host:""

I want to serve instead any other js file in the same folder /var/app/assets/build/app/, but the name of the other file can constantly change, for example app-62a5962b0a11.js. I was thinking about app\-(.*)\.js.

all the examples below does not work:

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /assets/build/app/app\-(.*)\.js;
        }
}

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /var/app/assets/build/app/app\-(.*)\.js;
        }
}


Also not working without regex to the location of the other file.

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /var/app/assets/build/app/app-62a5962b0a11.js;
        }
}

server {
        listen 80 default_server;
        root /var/app;

        location /assets/build/app/app\-(.*)\.js {
                try_files $uri $uri/ /assets/build/app/app-62a5962b0a11.js;
        }
}
nginx

1 Answers

  1. Best Answer

    Your location directive syntax is wrong. If you want to specify a regular expression, you must use the ~ or ~* modifier. See this document for details.

    Also, you cannot expect nginx to look for a random file that matches a pattern. Which means that your last attempt is closest to a working solution. For example:

    location ~ ^/assets/build/app/app-.+\.js$ {
    try_files $uri /assets/build/app/app-62a5962b0a11.js =404;
}

    I have added the =404 as the default term to avoid generating a loop in the case that app-62a5962b0a11.js does not exist. But in general, app-62a5962b0a11.js must exist for proper operation. See this document for try_files syntax.

    • 1