如何在 Node.js/Strapi 中保存文件实例

Question

我需要保存从 frontend/postman 收到的文件。例如 .txt 文件：

之后，在后端，我得到这样的文件：

const { body, files } = ctx.request;

“ctx”是指 Strapi API 的对象。这个文件看起来像

console.log(files.client)

它是文件的实例：

File {
  _events: [Object: null prototype] {},
  _eventsCount: 0,
  _maxListeners: undefined,
  size: 7,
  path: 'C:\Users\vvv\AppData\Local\Temp\upload_552c6e1cb7710c6c490533566b7be1d1',
  name: '111.txt',
  type: 'text/plain',
  hash: null,
  lastModifiedDate: 2022-04-20T06:41:53.462Z,
  _writeStream: WriteStream {
    fd: null,
    path: 'C:\Users\vvv\AppData\Local\Temp\upload_552c6e1cb7710c6c490533566b7be1d1',
    flags: 'w',
    mode: 438,
    start: undefined,
    pos: undefined,
    bytesWritten: 7,
    closed: true,
    _writableState: WritableState {
      objectMode: false,
      highWaterMark: 16384,
      finalCalled: false,
      needDrain: false,
      ending: true,
      ended: true,
      finished: true,
      destroyed: true,
      decodeStrings: true,
      defaultEncoding: 'utf8',
      length: 0,
      writing: false,
      corked: 0,
      sync: false,
      bufferProcessing: false,
      onwrite: [Function: bound onwrite],
      writecb: null,
      writelen: 0,
      afterWriteTickInfo: null,
      buffered: [],
      bufferedIndex: 0,
      allBuffers: true,
      allNoop: true,
      pendingcb: 0,
      constructed: true,
      prefinished: true,
      errorEmitted: false,
      emitClose: true,
      autoDestroy: true,
      errored: null,
      closed: true,
      closeEmitted: true,
      [Symbol(kOnFinished)]: []
    },
    _events: [Object: null prototype] {},
    _eventsCount: 0,
    _maxListeners: undefined,
    [Symbol(kFs)]: {
      appendFile: [Function: appendFile],
      appendFileSync: [Function: appendFileSync],
      access: [Function: access],
      accessSync: [Function: accessSync],
      chown: [Function: chown],
      chownSync: [Function: chownSync],
      chmod: [Function: chmod],
      chmodSync: [Function: chmodSync],
      close: [Function: close],
      closeSync: [Function: closeSync],
      copyFile: [Function: copyFile],
      copyFileSync: [Function: copyFileSync],
      cp: [Function: cp],
      cpSync: [Function: cpSync],
      createReadStream: [Function: createReadStream],
      createWriteStream: [Function: createWriteStream],
      exists: [Function: exists],
      existsSync: [Function: existsSync],
      fchown: [Function: fchown],
      fchownSync: [Function: fchownSync],
      fchmod: [Function: fchmod],
      fchmodSync: [Function: fchmodSync],
      fdatasync: [Function: fdatasync],
      fdatasyncSync: [Function: fdatasyncSync],
      fstat: [Function: fstat],
      fstatSync: [Function: fstatSync],
      fsync: [Function: fsync],
      fsyncSync: [Function: fsyncSync],
      ftruncate: [Function: ftruncate],
      ftruncateSync: [Function: ftruncateSync],
      futimes: [Function: futimes],
      futimesSync: [Function: futimesSync],
      lchown: [Function: lchown],
      lchownSync: [Function: lchownSync],
      lchmod: undefined,
      lchmodSync: undefined,
      link: [Function: link],
      linkSync: [Function: linkSync],
      lstat: [Function: lstat],
      lstatSync: [Function: lstatSync],
      lutimes: [Function: lutimes],
      lutimesSync: [Function: lutimesSync],
      mkdir: [Function: mkdir],
      mkdirSync: [Function: mkdirSync],
      mkdtemp: [Function: mkdtemp],
      mkdtempSync: [Function: mkdtempSync],
      open: [Function: open],
      openSync: [Function: openSync],
      opendir: [Function: opendir],
      opendirSync: [Function: opendirSync],
      readdir: [Function: readdir],
      readdirSync: [Function: readdirSync],
      read: [Function: read],
      readSync: [Function: readSync],
      readv: [Function: readv],
      readvSync: [Function: readvSync],
      readFile: [Function: readFile],
      readFileSync: [Function: readFileSync],
      readlink: [Function: readlink],
      readlinkSync: [Function: readlinkSync],
      realpath: [Function],
      realpathSync: [Function],
      rename: [Function: rename],
      renameSync: [Function: renameSync],
      rm: [Function: rm],
      rmSync: [Function: rmSync],
      rmdir: [Function: rmdir],
      rmdirSync: [Function: rmdirSync],
      stat: [Function: stat],
      statSync: [Function: statSync],
      symlink: [Function: symlink],
      symlinkSync: [Function: symlinkSync],
      truncate: [Function: truncate],
      truncateSync: [Function: truncateSync],
      unwatchFile: [Function: unwatchFile],
      unlink: [Function: unlink],
      unlinkSync: [Function: unlinkSync],
      utimes: [Function: utimes],
      utimesSync: [Function: utimesSync],
      watch: [Function: watch],
      watchFile: [Function: watchFile],
      writeFile: [Function: writeFile],
      writeFileSync: [Function: writeFileSync],
      write: [Function: write],
      writeSync: [Function: writeSync],
      writev: [Function: writev],
      writevSync: [Function: writevSync],
      Dir: [class Dir],
      Dirent: [class Dirent],
      Stats: [Function: Stats],
      ReadStream: [Getter/Setter],
      WriteStream: [Getter/Setter],
      FileReadStream: [Getter/Setter],
      FileWriteStream: [Getter/Setter],
      _toUnixTimestamp: [Function: toUnixTimestamp],
      F_OK: 0,
      R_OK: 4,
      W_OK: 2,
      X_OK: 1,
      constants: [Object: null prototype],
      promises: [Getter]
    },
    [Symbol(kIsPerformingIO)]: false,
    [Symbol(kCapture)]: false
  },
  [Symbol(kCapture)]: false
}

如何保存到服务器？我试图通过 fs.writeFile 和 fs.createWriteStream:

      fs.writeFile(filePath, files.client, function(err) {
        if(err) {
          return console.log(err);
        }
        console.log("The file was saved!");
      });

或

      let writeableStream = fs.createWriteStream(filePath);
      writeableStream.write(files.client);

但每次我都会出错：

TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received an instance of File

TypeError [ERR_INVALID_ARG_TYPE]: The "chunk" argument must be of type string or an instance of Buffer or Uint8Array. Received an instance of File

Answer 1

我自己找到了解决方案。文件已经下载到服务器上，我们只需要将它从一个文件夹移动到另一个文件夹。临时文件夹的路径包含在文件对象中。也许对某人有用：

const fs = require('fs')

const oldPath = 'C:\Users\vvv\AppData\Local\Temp\upload_552c6e1cb7710c6c490533566b7be1d1'
const newPath = 'new/path/file.txt'

fs.rename(oldPath, newPath, function (err) {
  if (err) throw err
  console.log('Successfully renamed - AKA moved!')
})

如何在 Node.js/Strapi 中保存文件实例

How save instance of File in Node.js/Strapi

node.js

strapi