使用go编写webassembly并在浏览器执行
参考博客
下载安装
编写测试文件hello.go
package main
import "fmt"
func main() {
fmt.Println("Hello World!")
}
生成wasm文件
GOARCH=wasm GOOS=js go build -o hello.wasm hello.go
在windows下需要先设置环境变量：$env:GOARCH="wasm";$env:GOOS="js";
添加依赖
cp $(go env GOROOT)/misc/wasm/wasm_exec.{html,js} .
添加一个测试http服务器
//http.go
package main
import (
"flag"
"log"
"net/http"
"strings"
)
var (
listen = flag.String("listen", ":8080", "listen address")
dir = flag.String("dir", ".", "directory to serve")
)
func main() {
flag.Parse()
log.Printf("listening on %q...", *listen)
log.Fatal(http.ListenAndServe(*listen, http.HandlerFunc(func(resp http.ResponseWriter, req *http.Request) {
if strings.HasSuffix(req.URL.Path, ".wasm") {
resp.Header().Set("content-type", "application/wasm")
}
http.FileServer(http.Dir(*dir)).ServeHTTP(resp, req)
})))
}
执行
go run http.go
查看效果
浏览器打开http://localhost:8080/wasm_exec.html，点击run，控制台可以看到效果
node执行
node wasm_exec.js test.wasm