[英]How to download image in angular with node.js?
在这里我有一个图像并单击该图像它打开菜单,在菜单中的一个下载选项,单击下载按钮我想下载此图像如何可能? (imageUrl位于代码控制台下方)。 当我点击下载时,我想打开另存为,并在我的电脑上下载图像
HTML
<mat-menu #contextMenu="matMenu">
<ng-template matMenuContent let-item="item">
<button mat-menu-item (click)="downloadFile(item)">Download</button>
<button mat-menu-item>Delete</button>
<button mat-menu-item>Rename</button>
</ng-template>
</mat-menu>
TS
folderObj : Folder = new Folder();
downloadFile(item) {
this.folderObj.folderName = `${this.commonUrlObj.commonUrl}/${item.urloffolder}/${item.imageName}`;
console.log(this.folderObj.folderName); // http://127.0.0.1:3000/122/122/733/15.jpg (this is imageUrl)
}
您可以使用锚标记检查波纹管代码
<a download href="{{commonUrlObj.commonUrl}}/{{item.urloffolder}}/{{item.imageName}}">Download</a>
使用文件保护程序,我们可以做到这一点,我希望这段代码是有用的
TS
folderObj : Folder = new Folder();
constructor(private userService : UserService){}
import { saveAs} from 'file-saver';
downloadFile(item){
let index = this.uploadedImagesObj.findIndex( x => x.imageName === item.imageName);
var filename = this.uploadedImagesObj[index].imageName;
this.userService.downloadFile({'filename': filename,'urloffolder' : item.urloffolder}).subscribe(
(data) => {
if(data && data != undefined && data != null){
saveAs(data,filename);
}
}
)
}
服务
import { HttpClient, HttpHeaders } from '@angular/common/http';
downloadFile(file){
return this.httpClient.post('http://127.0.0.1/downloadFile',file,{
responseType : 'blob',
headers : new HttpHeaders().append('content-type','application/json')
});
}
app.js(node.js代码)
app.post('/downloadFile',function(req,res,next){
filepath = path.join(__dirname,'./public/'+req.body.urloffolder+'/'+req.body.filename);
res.sendFile(filepath);
});
将img路径添加到a href
和img src
并添加download
属性,如<a href="imagepath" download="downloaded filename">
如果不起作用,请发表评论。
<div class="img-wrap">
<img src="imagepath"/>
<i class="fa fa-download" aria-hidden="true">
<a href="imagepath" download="downloaded filename"></a>
</i>
</div>
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