CODEWITHSUNDEEP
nginxgzip
Kevin Cox
Kevin Cox

Reputation: 3213

NGINX Serve Precompressed index file without source

I have found an interesting problem.

I am trying to serve some gzipped files without the sources using NGINX's gzip_static module (I know the downsides to this). This means you can have gzipped files on the server that will be served with transfer-encoding: gzip. For example, if there's a file /foo.html.gz, a request for /foo.html will be served the compressed file with content-encoding: text/html.

While this usually works it turns out that when looking for index files in a directory the gzipped versions are not considered.

GET /index.html
200

GET /
403

I was wondering if anyone knows how to fix this. I tried setting index.html.gz as in index file but it is served as a gzip file rather then a gzip encoded html file.

Upvotes: 9

Views: 2867

Answers (2)

Mike
Mike

Reputation: 9

You can prepare your precompressed files then serve it. Below it's prepared by PHP and served without checking if the client supports gzip.

// PHP prepare the precompressed gzip file
file_put_contents('/var/www/static/gzip/script-name.js.gz', gzencode($s, 9));
// where $s is the string containing your file to pre-compress

// NginX serve the precompressed gzip file
location ~ "^/precompressed/(.+)\.js$" {
    root /var/www;
    expires 262144;
    add_header Content-Encoding gzip;
    default_type application/javascript;
    try_files /static/gzip/$1.js.gz =404;
}

# Browser request a file - transfert 113,90 Kb (uncompressed size 358,68 Kb)
GET http://inc.ovh/precompressed/script-name.js

# Response from the server
Accept-Ranges bytes
Cache-Control max-age=262144
Connection keep-alive
Content-Encoding gzip
Content-Length 113540
Content-Type application/javascript; charset=utf-8
ETag "63f00fd5-1bb84"
Server NginX

Upvotes: 0

Fox
Fox

Reputation: 2368

This clearly won't work this way.

This is a part of the module source: 

 if (r->uri.data[r->uri.len - 1] == '/') {
     return NGX_DECLINED;
 }

So if the uri ends in slash, it does not even look for the gzipped version.

But, you probably could hack around using rewrite. (This is a guess, I have not tested it)

rewrite ^(.*)/$ $1/index.html;

Edit: To make it work with autoindex (guess) you can try using this instead of rewrite: 

location ~ /$ { 
    try_files ${uri}/index.html $uri;
}

It probably is better overall than using rewrite. But you need to try ...

Upvotes: 7

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