如何将大文件加载到分块的 Adonis JS 中？

Posted 2023-02-19

【中文标题】如何将大文件加载到分块的 Adonis JS 中？

【英文标题】：How to load a large file into Adonis JS divided into chunks?

【发布时间】：2021-10-28 02:21:43

【问题描述】：

我在 Adonis JS 框架上做网站的服务器端。 我的任务是加载大文件，为了解决这个问题，我决定使用块加载文件。 我找到了一些客户端代码，它似乎可以工作。

这是客户端的代码：https://codepen.io/chaly7500/pen/YzQyZNR

服务端代码：

//routes.ts.

apiGroup('v1', 'files', Route.group(async () => 
  Route.post('upload', 'Files/UploadController.index')
))

//UploadController.ts.
'use strict'
import HttpContextContract from "@ioc:Adonis/Core/HttpContext";
import MediaRepositories from "App/Repositories/MediaRepositories";

export default class UploadController 
   public async index(request:HttpContextContract)

     const file = request.file('file')
     // console.log(file)
     return await MediaRepositories.createMedia(file)
   

//MediaRepositories.ts

'use strict'
Import Application from "@ioc:Adonis/Core/Application";


export default class MediaRepositories 


  static async createMedia(file) 
    await file.move(Application.publicPath('media/transientmodels'))
  

  static async updateMediaById()

  

  static async updateMediaByIds()

  

上传到服务器后，我有一个blob文件 当我将 blob 文件更改为 blob.png 时，图像会中断

有没有人实现过使用 AdonisJS 上传大文件？

或者如何正确地将blob文件转换为图像或视频？

主要问题： 如何将大文件上传到adonis而不出现请求超时错误？

【参考方案1】：

我能够解决这个库的加载问题 https://www.npmjs.com/package/file-chunked

//UploadController.ts
'use strict'
import HttpContextContract from "@ioc:Adonis/Core/HttpContext";
import parseJson from "parse-json";
import MediaRepositories from "App/Repositories/MediaRepositories";
export default class UploadController 
  public async index(request:HttpContextContract)
    
    const file = await request.file('file')
    const chunkMetaDataStr = await request.input('chunkMetadata');
    const chunkMetaData = await parseJson(chunkMetaDataStr);
    return await MediaRepositories.createMedia(file, chunkMetaData)

  

// MediaRepositories.ts
'use strict'
import Application from "@ioc:Adonis/Core/Application";
import FileChunked from "file-chunked";
import * as fs from "fs";
import Media from "App/Models/Media";
import Env from '@ioc:Adonis/Core/Env'

export default class MediaRepositories 


  static async createMedia(file, chunkMetaData) 

    await file?.move(Application.publicPath('media/transientmodels/' + chunkMetaData.FileGuid + '/tmp_chunks'));

    await FileChunked.upload(
      chunkStorage: Application.publicPath('media/transientmodels/' + chunkMetaData.FileGuid), // where the uploaded file(chunked file in this case) are saved
      uploadId: chunkMetaData.FileGuid,
      chunkIndex: chunkMetaData.Index,
      totalChunksCount: chunkMetaData.TotalCount,
      filePath: file?.filePath,
    );

    if (chunkMetaData.Index == (chunkMetaData.TotalCount - 1)) 
     
        fs.copyFileSync(Application.publicPath('media/transientmodels/' + chunkMetaData.FileGuid + '/tmp_chunks/' + file.clientName),
          Application.publicPath('media/transientmodels/' + chunkMetaData.FileGuid + '/tmp_chunks/' + chunkMetaData.FileName));