我正在构建一个Webassembly应用程序，Docker没有反映对html文件的更改。 在构建 Docker 文件之前，我修剪了系统，希望这会强制进行全新的构建。 有什么指示吗？
FROM golang:alpine AS builder
ENV GO111MODULE=on
CGO_ENABLED=0
GOOS=linux
GOARCH=amd64
COPY . .
COPY ./server.go .
COPY ./favicon.ico .
COPY ./assets /assets
EXPOSE 8989
CMD ["go", "run", "./server.go"]
这就是我运行构建容器的方式。
docker system prune -a -f
docker build --no-cache -t test3 .
docker run -it test3
html文件在本地主机上运行，作为我开始使用的第一个版本。 这是服务器.go
package main
import (
"flag"
"fmt"
"net/http"
"strings"
)
type FileSystem struct {
fs http.FileSystem
}
var listen = flag.String("listen", ":8989", "listen address")
var dir = flag.String("dir", ".", "directory to serve")
func main() {
flag.Parse()
directory := "./"
fileServer := http.FileServer(FileSystem{http.Dir(directory)})
http.Handle("/", fileServer)
fmt.Printf("Web server running. Listening on %q", *listen)
err := http.ListenAndServe(*listen, http.FileServer(http.Dir(*dir)))
fmt.Printf("%vn", err)
}
func (fs FileSystem) Open(path string) (http.File, error) {
f, err := fs.fs.Open(path)
if err != nil {
return nil, err
}
s, err := f.Stat()
if s.IsDir() {
index := strings.TrimSuffix(path, "/") + "/index.html"
if _, err := fs.fs.Open(index); err != nil {
return nil, err
}
}
return f, nil
}
最后是 html 文件。
<!DOCTYPE HTML>
<html>
<head>
<title>Wasm 1.0</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
<link rel="stylesheet" href="./assets/css/main.css" />
<link rel="icon" href="./favicon.ico?v=1">
<link rel="icon" type="image/png" sizes="96x96" href="./assets/images/icons/icon-96x96.png">
<link rel="icon" type="image/png" sizes="96x96" href="./assets/images/icons/icon-128x128.png">
<link rel="icon" type="image/png" sizes="96x96" href="./assets/images/icons/icon-144x144.png">
<link rel="icon" type="image/png" sizes="96x96" href="./assets/images/icons/icon-152x152.png">
<link rel="icon" type="image/png" sizes="96x96" href="./assets/images/icons/icon-192x192.png">
<link rel="icon" type="image/png" sizes="96x96" href="./assets/images/icons/icon-384x384.png">
<link rel="icon" type="image/png" sizes="96x96" href="./assets/images/icons/icon-384x384.png">
<link rel="manifest" href="./assests/manifest.json">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="msapplication-TileImage" content="/ms-icon-144x144.png">
<meta name="theme-color" content="#ffffff">
</head>
<body class="is-preload">
<script src="./assets/js/wasm_exec.js"></script>
<script>
wasm_filename = "./assets/main.wasm";
function message(s){
document.getElementById("message").textContent = s;
}
function load_wasm(){
if (!WebAssembly.instantiateStreaming) { // polyfill
WebAssembly.instantiateStreaming = async (resp, importObject) => {
const source = await (await resp).arrayBuffer();
return await WebAssembly.instantiate(source, importObject);
};
}
const go = new Go();
WebAssembly.instantiateStreaming(fetch(wasm_filename), go.importObject)
.then(results => { go.run(results.instance); })
.catch((err) => {
message("Error Loading WebAssembly - " + err);
console.error(err);
// location.reload(true);
});
}
load_wasm()
</script>
<nav id="nav">
<ul class="container">
<li><a href="/">Reload</a></li>
</ul>
</nav>
<div id="message" class="message"></div>
<article id="top" class="wrapper style1">
<div class="container">
<div class="row">
<div class="col-4 col-5-large col-12-medium">
</div>
<div class="col-8 col-7-large col-12-medium">
<header>
<h1><strong>Wasm</strong>.</h1>
</header>
<a class="button large" onclick="sum();">Calculate</a>
<div><input type="text" id="num1"></div>
<div><input type="text" id="num2"></div>
<div><input type="text" id="result"></div>
</div>
</div>
</div>
</article>
<script src="./assets/js/jquery.min.js"></script>
<script src="./assets/js/jquery.scrolly.min.js"></script>
<script src="./assets/js/browser.min.js"></script>
<script src="./assets/js/breakpoints.min.js"></script>
<script src="./assets/js/util.js"></script>
<script src="./assets/js/main.js"></script>
<script src="./assets/js/app.js"></script>
</body>
</html>
问题是我需要做端口转发：
码头工人运行 -p 8989：8989 测试3
它现在有效。