esc - 嵌入文件到Go程序并提供http.FileSystem接口给他们

esc - 嵌入文件到Go程序并提供http.FileSystem接口给他们

esc

esc embeds files into go programs and provides http.FileSystem interfaces to them.

It adds all named files or files recursively under named directories at the path specified. The output file provides an http.FileSystem interface with zero dependencies on packages outside the standard library.

Installation

go get -u github.com/mjibson/esc

Usage

esc [flag] [name ...]

The flags are:

-o="" output filename, defaults to stdout-pkg="main" package name of output file, defaults to main-prefix="" strip given prefix from filenames-ignore="" regular expression for files to ignore-include="" regular expression for files to include-modtime="" Unix timestamp to override as modification time for all files-private unexport functions by prefixing them with esc, e.g. FS -> escFS-no-compress do not compress files

Accessing Embedded Files

After producing an output file, the assets may be accessed with the FS() function, which takes a flag to use local assets instead (for local development).

(_esc)?FS(Must)?(Byte|String) returns an asset as a (byte slice|string).(_esc)?FSMust(Byte|String) panics if the asset is not found.

Go Generate

esc can be invoked by go generate:

//go:generate esc -o static.go -pkg server static

Example

Embedded assets can be served with HTTP using the http.FileServer. Assuming you have a directory structure similar to the following:

.├── main.go└── static ├── css │   └── style.css └── index.html

Where main.go contains:

package mainimport ( "log" "net/http")func main() { // FS() is created by esc and returns a http.Filesystem. http.Handle("/static/", http.FileServer(FS(false))) log.Fatal(http.ListenAndServe(":8080", nil))}

Generate the embedded data: esc -o static.go staticStart the server: go run main.go static.goAccess http://localhost:8080/static/index.html to view the files.

You can see worked example in example dir just run it as go run example/main.go example/static.go

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