Golang plugin 插件例子

来源：互联网发布：淘宝店铺首页显示不全编辑：程序博客网时间：2024/04/20 19:28

好像手上有场景可以用Go1.8的插件来弄，写了个例子.

plug3/plug3.go:

package main/*封装Key到.soAuthor: XCLDate: 2017-7-16*/type ApiKey struct {key string}var myApiKey ApiKeyfunc init() {myApiKey = ApiKey{key: "xcl"}}func main() {}// so导出的函数名func GetEmailAppKey() func() string {return myApiKey.GetKey}func (k *ApiKey) GetKey() string {return k.key}

main.go:

package main/*Golang 插件例子,  go1.8以上才支持，且例子仅跑在linux上   编译出.so   go build -tags example -o plug3.so -buildmode=plugin plug3/plug3.go   编译主文件   go build -tags example -o plugdemo main.go   使用例子   ./plugdemo  ./plug3.soAuthor: XCLDate: 2017-7-16*/import ("errors""fmt""os""plugin")const (fnKey = "GetEmailAppKey")func main() {if len(os.Args) < 2 {fmt.Println("请传入.os。")os.Exit(1)}pluginFilename := os.Args[1]if _, err := os.Stat(pluginFilename); os.IsNotExist(err) {fmt.Println(".os不存在。")os.Exit(1)}plug, err := plugin.Open(pluginFilename)if err != nil {fmt.Println(err)os.Exit(1)}fn, err := GetPluginKeyFnsByName(plug, fnKey)if err != nil {fmt.Println(err)os.Exit(1)}nn := fn()fmt.Println(" appKey:", nn)}func GetPluginKeyFnsByName(p *plugin.Plugin, symbolName string) (func() string, error) {if p == nil {return nil, errors.New("p为空指针.")}sym, err := p.Lookup(symbolName)if err != nil {return nil, err}fn, ok := sym.(func() func() string)if !ok {return nil, fmt.Errorf("symbol:%T ", sym)}if fn() == nil {return nil, errors.New("fn为空.")}return fn(), nil}

Blog: blog.csdn.net/xcl168

阅读全文

0 0