[英]nestjs multer get list of new file names after multer storage
我有这个用于上传文件的中间件。
@Injectable()
export class FilesMiddleware implements NestMiddleware {
private storage = multer.diskStorage({
destination: (req, file, cb) => {
cb(null, path.join(__dirname, '../../uploads/'));
},
filename: (req, file, cb) => {
let extArray = file.mimetype.split("/");
let extension = extArray[extArray.length - 1];
cb(null, file.fieldname + '-' + Date.now() + '.' + extension)
}
});
resolve(...args: any[]): MiddlewareFunction {
return (req, res, next) => {
console.log(req.files);
const upload = multer({storage: this.storage});
upload.any();
return next();
}
}
}
在我的请求中,当我使用req.files
它给我原始文件名而不是新文件名(与我在multer存储选项中设置的日期等)的问题。
有没有办法我可以使用中间件上传更新的文件名multer?
@Post('upload')
@UseInterceptors(FilesInterceptor('files[]', 20, {}))
public async onUpload(@Request() req, @Response() res, @UploadedFiles() files) {
const mediaResponse = await this.media.saveMedias(0, files);
res.json({status: true});
}
首先:它不通过内置的意义的,都使用multer FilesInterceptor
和定制FilesMiddleware
。 选择以下两个选项之一 :
FilesInterceptor
(推荐) 您可以直接为每个FilesInterceptor
提供存储配置:
const storage = {...};
@Controller()
export class AppController {
@Post('upload')
@UseInterceptors(FilesInterceptor('files', 20, { storage }))
public async onUpload(@UploadedFiles() files) {
return files.map(file => file.filename);
}
}
或者通过导入MulterModule
提供默认的multer存储配置 :
imports: [
MulterModule.register({
storage: {...},
})
]
FilesInterceptor
) 如果您需要比FilesInterceptor
提供的更多灵活性,请仅使用此选项。 您可以使用Promise
等待上传完成。 上传后,您可以通过req.files
访问新文件名。
export class FilesMiddleware implements NestMiddleware {
private storage = {...};
async use(req, res, next) {
const upload = multer({ storage: this.storage });
// wait until upload has finished
await new Promise((resolve, reject) => {
upload.array('files')(req, res, err => err ? reject(err) : resolve());
});
// Then you can access the new file names
console.log(req.files.map(file => file.filename));
return next();
}
}
通过request
对象访问控制器中的上传文件:
@Post('upload')
public async onUpload(@Request() req) {
return req.files.map(file => file.filename);
}
您将在req.files
(中间件)或@UploadedFiles() files
(拦截器)中找到上传的文件作为具有以下结构的数组:
[ { fieldname: 'files',
originalname: 'originalname.json',
encoding: '7bit',
mimetype: 'application/json',
destination: 'D:/myproject/src/uploads',
// This is what you are looking for
filename: 'files-1558459911159.json',
path:
'D:/myproject/src/uploads/files-1558459911159.json',
size: 2735 } ]
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