Docs: https://docs.nestjs.com/techniques/file-upload

上传单文件

import { FileInterceptor } from '@nestjs/platform-express';

  @Post('upload')

  @UseInterceptors(FileInterceptor('file')) // file对应HTML表单的name属性

  UploadedFile(@UploadedFile() file, @Body() body){

    l(body.name)

    const writeImage = createWriteStream(join(__dirname, '..', 'upload', `${file.originalname}`))

    writeImage.write(file.buffer)

  }

---

上传文件数组

  @Post('upload')

  @UseInterceptors(FilesInterceptor('files'))

  UploadedFile(@UploadedFiles() files, @Body() body) {

    if (!body.name || files.length === 0) {

      throw new HttpException('请求参数错误.', HttpStatus.FORBIDDEN)

    }

    for (const file of files) {

      const writeImage = createWriteStream(join(__dirname, '..', 'upload', `${body.name}-${Date.now()}-${file.originalname}`))

      writeImage.write(file.buffer)

    }

  }

---

上传多个字段的文件

  @Post('upload')

  @UseInterceptors(FileFieldsInterceptor([{

      name: 'front',

      maxCount: 1

    },

    {

      name: 'back',

      maxCount: 1

    },

  ]))

  UploadedFile(@UploadedFiles() files, @Body() body) {

    if (!body.name || _.isEmpty(files)) {

      throw new HttpException('请求参数错误.', HttpStatus.FORBIDDEN)

    }

    _.each(files, (v: any[], k: string) => {

      for (const file of v) {

        const writeImage = createWriteStream(join(__dirname, '..', 'upload', `${body.name}-${k}-${Date.now()}-${file.originalname}`))

        writeImage.write(file.buffer)

      }

    })

  }