cloudinary上传文件找不到文件

Question

我想使用 cloudinary 上传文件，但它不起作用。文件字符串参数应该是什么？

@Injectable()
export class CloudinaryService {
  async uploadImage(
    file: Express.Multer.File,
    id: string,
  ): Promise<UploadApiResponse | UploadApiErrorResponse> {
    return new Promise((resolve, reject) => {
      v2.uploader.upload(
        file.filename,
        { public_id: id, folder: 'business', resource_type: 'auto' },
        (error, result) => {
          if (error) return reject(error);
          resolve(result);
        },
      );
    });
  }
}

这是文件对象

{
  fieldname: 'DirectorsDetails',
  originalname: 'Eddy - Information about directors.xlsx',
  encoding: '7bit',
  mimetype: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  buffer: <Buffer 50 4b 03 04 14 00 08 08 08 00 14 2a be 52 00 00 00 00 00 00 00 00 00 00 00 00 18 00 00 00 78 6c 2f 64 72 61 77 69 6e 67 73 2f 64 72 61 77 69 6e 67 31 ... 5072 more bytes>,
  size: 5122
}

Answer 1

试试这个看看是否有帮助：

调整 multer 以使用内存存储在后期获取缓冲区

// app.module.ts
import { MulterModule } from '@nestjs/platform-express';
import { memoryStorage } from 'multer';

@Module({
  imports: [
    ...
    MulterModule.register({
      storage: memoryStorage(), // use memory storage for having the buffer
    }),
  ],
  controllers: [AppController],
  providers: [AppService],
})
export class AppModule {}

将缓冲区转为流式传输并引导其上传

import { Injectable } from '@nestjs/common';
import { UploadApiErrorResponse, UploadApiResponse, v2 } from 'cloudinary';
import { Readable } from 'stream';

@Injectable()
export class CloudinaryService {
  async uploadImage(
    file: Express.Multer.File,
  ): Promise<UploadApiResponse | UploadApiErrorResponse> {
    return new Promise((resolve, reject) => {
      const upload = v2.uploader.upload_stream((error, result) => {
        if (error) return reject(error);
        resolve(result);
      });
      Readable.from(file.buffer).pipe(upload); // covert buffer to readable stream and pass to upload
    });
  }
}

---

如果您想先将其保存到本地目录，您可以这样做，但您需要通过fs.createReadStream 从路径中读取文件以制作它的流并将其上传到 cloudinary。

---

如果你不能让它工作，我可以上传一个例子到 github 供你交叉检查。

Answer 2

file.filename 仅在您将 multer 文件存储在磁盘上时才会填充。也许file.originalname 就是您要寻找的属性。

Answer 3

尝试使用upload_stream 函数。

import { FileUpload } from 'graphql-upload';

export class CloudinaryService {
  async uploadImage(
    file: FileUpload,
  ): Promise<UploadApiResponse | UploadApiErrorResponse> {
    return new Promise((resolve, reject) => {
      const upload = v2.uploader.upload_stream((error, result) => {
        if (error) return reject(error);
        resolve(result);
      });

      file.createReadStream().pipe(upload);
    });
  }
}