使用vfsgen 嵌入静态资源到golang
vfsgen 是一个很不错的golang 静态资源嵌入工具包，使用简单，功能强大，以下是一个简单的使用
环境准备
- docker-compose 文件
主要是方便构建以及运行
version: "3"
services:
app:
build: ./
image: dalongrong/vfsgen-app
ports:
- "9090:9090"
- vfsgen 试用
主要是基于vfsgen提供的包，调用方便，方便生成代码可以直接调用的包（嵌入的资源）
项目结构
dist 为生成的嵌入静态资源的包，cmd 为生成的嵌入资源的代码调用，项目根的main.go为一个httpserver 主要是调用
生成的嵌入资源的包，resource 为一些环境
├── Dockerfile
├── README.md
├── cmd
│ └── main.go
├── dist
│ └── mydir-dist.go
├── docker-compose.yaml
├── go.mod
├── go.sum
├── main.go
└── resource
├── dev
│ ├── css
│ │ └── index.css
│ ├── fs
│ ├── index.html
│ └── js
│ └── index.js
└── pre
├── css
│ └── index.css
├── fs
├── index.html
└── js
└── index.js
go.mod
module github.com/rongfengliang/demoapp
go 1.14
require (
github.com/mitchellh/gox v1.0.1 // indirect
github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749 // indirect
github.com/shurcooL/vfsgen v0.0.0-20200627165143-92b8a710ab6c // indirect
golang.org/x/tools v0.0.0-20200724001824-cbb3c69a3747 // indirect
)
cmd/main.go
package main
import (
"log"
"net/http"
"github.com/shurcooL/httpfs/union"
"github.com/shurcooL/vfsgen"
)
func main() {
// 使用了union可以方便的进行资源合并
// use union for combin resource
var Assets = union.New(map[string]http.FileSystem{
"/login/dev": http.Dir("./resource/dev"),
"/login/pre": http.Dir("./resource/pre"),
})
var fs http.FileSystem = Assets
err := vfsgen.Generate(fs, vfsgen.Options{
PackageName: "dist",
Filename: "./dist/mydir-dist.go",
VariableName: "MyDir",
})
if err != nil {
log.Fatalln(err)
}
}
main.go
package main
import (
"net/http"
"github.com/rongfengliang/demoapp/dist"
)
func main() {
http.Handle("/login/pre/", http.FileServer(dist.MyDir))
http.Handle("/login/dev/", http.FileServer(dist.MyDir))
http.ListenAndServe(":9090", nil)
}
- dockerfile
为了方便打包，代码使用了gox 构建很方便,一个命令就可搞定基本主流平台的打包
FROM golang:1.14-alpine AS build-env
WORKDIR /go/src/app
RUN /bin/sed -i 's,http://dl-cdn.alpinelinux.org,https://mirrors.aliyun.com,g' /etc/apk/repositories
ENV GO111MODULE=on
ENV GOPROXY=https://goproxy.cn
RUN go get github.com/mitchellh/gox
COPY go.mod .
COPY go.sum .
COPY main.go .
COPY resource ./resource
COPY dist ./dist
COPY cmd/main.go ./cmd/main.go
RUN apk update && apk add git \
&& go run cmd/main.go && gox
FROM alpine:latest
WORKDIR /app
RUN /bin/sed -i 's,http://dl-cdn.alpinelinux.org,https://mirrors.aliyun.com,g' /etc/apk/repositories
RUN apk update && apk add ca-certificates && rm -rf /var/cache/apk/*
COPY --from=build-env /go/src/app/demoapp_* /app/
CMD ["/app/demoapp_linux_amd64"]
构建&&运行效果
- 构建
docker-compose build
- 启动
docker-compose up -d
访问 /login/pre/ /login/dev 地址 
说明
从工具的使用上vfsgen 是比较高效以及简单的，是一个不错的静态资源嵌入工具,而且还支持template操作
参考资料
https://github.com/rongfengliang/vfsgen-learning
https://github.com/shurcooL/vfsgen
https://github.com/mitchellh/gox
https://github.com/laher/goxc
