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前言
在 Go 语言中,能够应用 embed 包嵌入动态文件。embed 包是 Go 1.16 版本引入的个性,它反对将动态文件打包到可执行程序中,这样就不用内部依赖资源文件了。
用途举例:go 联合 html 打包桌面利用
用法
1. 文件目录:
|- main.go
|- web
|- index.html
|- assets
|- index.js
|- index.css
2.go 文件
package main
import (
"embed"
"fmt"
"net/http"
)
//go:embed web/index.html
var staticFiles embed.FS
//go:embed web/assets/*
var assetsFiles embed.FS
func main() {http.HandleFunc("/", serveIndex)
files, err := assetsFiles.ReadDir("web/assets")
if err != nil {panic(err)
}
for _, file := range files {fileName := file.Name()
fmt.Println("/assets/" + fileName)
http.HandleFunc("/assets/"+fileName, handleAssets(fileName))
}
fmt.Println("Listen:8080...")
err = http.ListenAndServe(":8080", nil)
if err != nil {fmt.Println(err.Error())
}
}
func serveIndex(w http.ResponseWriter, r *http.Request) {indexHTML, err := staticFiles.ReadFile("web/index.html")
if err != nil {http.Error(w, "404 Not Found", http.StatusNotFound)
return
}
fmt.Fprintf(w, string(indexHTML))
}
func serveStatic(w http.ResponseWriter, r *http.Request) {staticServer := http.FileServer(http.FS(assetsFiles))
http.StripPrefix("/assets/", staticServer).ServeHTTP(w, r)
}
func handleAssets(fileName string) http.HandlerFunc {return func(w http.ResponseWriter, r *http.Request) {indexHTML, err := assetsFiles.ReadFile("web/assets/" + fileName)
if err != nil {// http.Error(w, "404 Not Found", http.StatusNotFound)
fmt.Println(err.Error())
return
}
fmt.Fprintf(w, string(indexHTML))
}
}
3. 调试
拜访:http://localhost:8080/
查看 html,js,css 文件是否被正确援用
正文完