Example using go-assets in gin - go

Question

I'd like to have a single binary for a go-app, rather than having to bundle static files alongside the deployment.
I'm using a function like this to access PNGs I'm loading:
func getFileList(dir string) (fileList []os.FileInfo, err error) {
// USAGE:
// fileList,_ := getFileList(PNG_DIR)
f, err := os.Open(PNG_DIR)
defer f.Close()
checkErr(err)
fileList, err = f.Readdir(0)
checkErr(err)
return fileList, err
}
I take this list of files and serve it on a static endpoint, with some logic.
I have read the following documentation for using go-assets
https://github.com/jessevdk/go-assets-builder/blob/master/builder.go
https://github.com/jessevdk/go-assets-builder
https://github.com/jessevdk/go-assets/blob/master/generate.go
As well as this gin specific example:
https://github.com/gin-gonic/gin/blob/master/examples/assets-in-binary/assets.go
https://github.com/jessevdk/go-assets/blob/master/example_test.go
https://github.com/gin-gonic/gin/tree/master/examples/assets-in-binary
Which contains the following example:
Prepare Packages
go get github.com/gin-gonic/gin go get
github.com/jessevdk/go-assets-builder
Generate assets.go
go-assets-builder html -o assets.go
Build the server
go build -o assets-in-binary
Run
./assets-in-binary
However, it's not clear to me how to call this file I have built. For example, What do I change in my getFileList() function to now point to whatever I built in the binary, what is it even called and how would I know that?

Answer 1

Usually on gin you would use router.Statuc(path, dir) however you said you first load a list of files and I guess you will later use http.ServeFile.
With go-bindata you have all the files already inside the executable, you can access them using the Asset(file) function...
Basically this is a very simple static handler for gin:
func StaticHandler(c *gin.Context) {
p := c.Param("filepath")
data, err := Assets(p)
if err != nil { return }
c.Writer.Write(data)
}
You can register the static handler into your router:
router.GET("/static/*filepath", StaticHandler)
This allows to access static resources the following way: /static/css/style.css and will load the file css/style.css
You could get the list of files inside your folder, create a map and use that map for the static handler (to limit what files are accesed)