Fork from https://github.com/schollz/httpfileserver . This branch supports deflate, brotli, zstd, gzip and other methods.
This is a drop-in replacement for the stdlib http.FileServer that automatically provides gzipping as well as serving from memory instead of from disk. This library wraps the stdlib http.FileServer so you get all the benefits of that code, while also providing gzipping and keeping track of bytes and storing served files from memory when they come available.
To use, you can just replace the http.Fileserver in your http.Handle or http.HandlerFunc with httpfileserver.New(route,directory). For example, to serve static assets, you can replace the std lib version
http.Handle("/static/", http.FileServer(http.Dir(".")))
with this version
http.Handle("/static/", httpfileserver.New("/static/", "."))
go get -u github.com/3JoB/httpfileserver
In order to serve files from a different directory other than specified by the route, you need to include the route when specifying a file server. For example, if you want to serve /static files from a local directory called /tmp/myassets then you can specify a new file server in the following:
http.Handle("/static/", httpfileserver.New("/static/", "/tmp/myassets"))
The route is in the handle as well as the instance of the file server so that it can trim it and then server from the directory as intended.
see example
Using the example in this repo I tested both the stdlib and this version for serving a file. This version is about 22% faster (since it is reading from memory) and automatically uses gzip when capable.
Using the Go stdlib (http.Handle("/", http.FileServer(http.Dir(".")))):
$ ab -n 20000 -H "Accept-Encoding: gzip,deflate" http://localhost:1113/main.go # stdlib
...
HTML transferred: 4640000 bytes
Requests per second: 3575.56 [#/sec] (mean)
...
Using this library http.Handle("/new/", httpfileserver.New("/new", ".")):
$ ab -n 20000 -H "Accept-Encoding: gzip,deflate" http://localhost:1113/new/main.go # this lib
...
HTML transferred: 3680000 bytes
Requests per second: 4544.44 [#/sec] (mean)
...
MIT