如何在均值/角度js中检测是否从客户端成功下载文件 [英] how to detect whether file download successfully from client side in mean/angular js

问题描述

我创建了一个聊天应用程序，其中保持了通过聊天窗口发送文件的功能.现在，当客户端成功下载文件时，我想从服务器端删除文件.我正在使用MEAN堆栈.

I have created a chat application in which I have kept file sending functionality over chat windows. Now I want to remove files from the server end when clients successfully download them. I'm using the MEAN stack.

router.post("/postChatFileSend",ensureAuthenticatedForPost,function(req,res) {

    if (req.body.fileName)
    {
        var filePath = __dirname + '/../public/ChatFile/'+req.body.fileName;
        fs.unlink(filePath, function (err) {
        })
    };

    return res.json({"status": true,"messages":"messages read sucessfully"});  
})

router.get('/downloadChatFile/:fileName',ensureAuthenticatedForPost, function(req, res) {

    var file = __dirname + '/../public/ChatFile/'+req.params.fileName;
    res.download(file); 
});

推荐答案

您可以使用

You can use jQuery File Download plugin for your purpose, it's a simple example you can use in your client for manage the downloaded file:

$.fileDownload('urlForYourFile')
    .done(function () { 
        alert('File download a success!'); 
        $.post('/postChatFileSend', {fileName: 'fileName'}, function(data) {
            //Check the response, if the status propery is true, the file must have been removed from the server 
        });
    })
    .fail(function() {
        alert('An error has ocurred');
    });

这里有更多示例

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