可以将golang通道绑定到模板中

时间:2016-05-03 09:28:51

标签: go go-templates

我有这样的模板(upload.tmpl.html):

<html>
<body>
  <div class="container">
    <ul>
      <li>current fileName : {{ .fileName}} </li>
    </ul> 
</body>
</html>

带有

的处理程序uploadHandler.go
func UploadHandler(c *gin.Context) {
    file, header, err := c.Request.FormFile("file-upload")
    if err != nil {
        log.Fatal("Erreur dans la récupération de fichier")
    }
    //...
    fileName := make(chan string)

    go ReadCsvFile(bytes, fileName)
    go func() {
        for {
            log.Info(<-fileName)
        }
    }()

    c.HTML(http.StatusOK, "upload.tmpl.html", gin.H{
        "fileName":    <-fileName,
    })
}

ReadCsvFile()这样的方法:

func ReadCsvFile(bytesCSV []byte, fileName chan string) {
    r := bytes.NewReader(bytesCSV)
    reader := csv.NewReader(r)
    reader.Comma = ';'

    records, err := reader.ReadAll()

    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    db, _ := databaseApp.OpenDatabase()
    defer db.Close()
    for _, record := range records {
        fileName <- record[0]
        product := &em.Product{
            Name:        record[0],
            //...
        }
        db.Create(product)

    }
    fileName <- "done"
}

我尝试在模板中显示每行的当前fileName,但是可以将频道绑定到模板中吗?因为以这种方式页面不再加载。

1 个答案:

答案 0 :(得分:1)

使用Websockets。以下是一些例子:

HTML / JavaScript的:

<script>
    var ws= new WebSocket("ws://yoursite.com");
    ws.onmessage = function (event) {
        console.log(event.data);
        // $('#your-element').html(event.data);
    }
</script>

Go Websockets:

func websocketSenderHandler(conn *websocket.Conn){
    for {
        msg := <- globalChannel
        conn.WriteMessage(websocket.TextMessage, msg)
    }
}

Go中的更多Websockets:golang.org/x/net/websocket

其他示例:https://github.com/golang-samples/websocket