角下载node.js response.sendFile [英] Angular download node.js response.sendFile

问题描述

目前，我的nodejs服务正在执行此操作:

At the moment my nodejs service is doing this:

...
fs.writeFileSync('filelocation/data.xlsx', theData, 'binary');
reponse.sendFile('filelocation/data.xlsx');
reponse.download('filelocation/data.xlsx'); // I tried this one also
...

但是现在如何使用HttpClient从Angular前端下载此文件?这不起作用:

But now how do I download this from Angular front end using the HttpClient? This does not work:

this.httpclient.get(url).subscribe(response => {
  console.log(response); // Or whatever I need to do to download the file
});

我希望该呼叫调出文件浏览器，以便我可以保存文件.我该如何工作?如果您需要我的更多信息，请告诉我.

I want the call to bring up the file explorer so that I can save the file. How do I get this working? If you need more info from me just let me know please.

推荐答案

创建一个component.ts并将文件名传递给fileService. 在fileService内部创建下载功能，并使用该功能将文件名传递给后端服务器.可以使用"saveAs"下载文件.安装filesaver( npm install file-saver --save )，然后在前端组件中导入"saveAs".

create a component.ts and pass filename to fileService. inside fileService create download function and using that pass the filename to backend server. File can be downloaded using 'saveAs'. Install filesaver (npm install file-saver --save) and import 'saveAs' in frontend component.

Download(filename){
    console.log(filename);
    this.fileService.download(filename).subscribe((data)=>{
        console.log(data);
        saveAs(data, filename);
    });
}

Component.ts

Component.ts

download(filename){
    const fileObj = {
        filename : filename
    };
    console.log(fileObj);
    return this.http.post(`http:localhost:3000/download`, fileObj, {
        responseType : 'blob',
    });
} 

fileService.ts

fileService.ts

app.post('/download', (req, res, next) => {
    console.log('here');
    filepath = path.join(__dirname,'../uploadedFiles') + '/' + req.body.filename;
    console.log(filepath);
    res.sendFile(filepath);
});

Server.js

Server.js

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