electron 使用 web worker 上传批量的文件（7W+）报 Maximum call stack size exceeded 错误

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This topic created in 2202 days ago, the information mentioned may be changed or developed.

web worker 从主进程获取到上传文件的路径，在 onmessage 处理上传，通过 fs.promises.stat 获取文件的信息，通过 postMessage 回传至 worker 主进程中，在 worker 主进程中，将这些数据更新至 vuex 中，出现了下面的问题，小数量级的文件，不会出现这个问题

  (node:33176) UnhandledPromiseRejectionWarning: RangeError: Maximum call stack size exceeded
      at Array.mutator (D:\pc-win\SKYD-win\node_modules\vue\dist\vue.runtime.common.dev.js:870:27)
      at Store.addMultiTaskUL (webpack:///./src/renderer/store/modules/task.js?:164:72)
      at wrappedMutationHandler (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:727:13)
      at commitIterator (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:393:7)
      at Array.forEach (<anonymous>)
      at D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:392:11
      at Store._withCommit (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:523:3)
      at Store.commit (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:391:8)
      at Store.boundCommit [as commit] (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:336:19)
      at local.commit (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:681:13)
      at eval (webpack:///./src/renderer/store/modules/task.js?:476:7)
      at new Promise (<anonymous>)
      at new F (webpack:///./node_modules/core-js/library/modules/_export.js?:36:28)
      at Store.addMultiTaskUL (webpack:///./src/renderer/store/modules/task.js?:440:12)
      at Array.wrappedActionHandler (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:734:23)
      at Store.dispatch (D:\pc-win\SKYD-win\node_modules\vuex\dist\vuex.common.js:439:15)
  (node:33176) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 10)

10 replies • 2020-04-29 15:11:08 +08:00

TomeWong

Apr 29, 2020

```
self.onmessage = async event => {
console.log(event)
const { diskType, files, dirpath, sid, usn, currentFileId, currentGroupId, currentCreatedByUsn, baseUrl, uploadLimit, uploadSpeed } = event.data
const queueData = [],
taskDataArr = []
let completeStatus
for (let elem of files) {
const filePath = elem,
// stats = await fs.promises.stat(filePath).catch(error => console.log(error)),
// size = stats.size,
chunkSize = 5 * 1024 * 1024, //每片分块的大小 5M
// pieces = Math.ceil(size / chunkSize),
uploadType = pieces == 1 ? 1 : 3,
num = filePath.lastIndexOf('\\') + 1,
name = filePath.substring(num),
uuid = uuidv4(),
basename = dirpath ? path.basename(dirpath) : '',
realPath = dirpath ? filePath.substring(filePath.indexOf(basename), filePath.lastIndexOf("\\")).replace(/\\/g, "/") : ''
const payload = {
appFileId: "",
diskType: diskType,
uploadType: uploadType,
creatorUsn: currentCreatedByUsn || usn,
parentid: currentFileId == -2 ? -1 : currentFileId || -1,
groupId: diskType == 1 ? '' : currentGroupId,
fileSize: 0,
fileName: name,
fileMd5: '',
fileRealPath: realPath,
comeFrom: 30,
model: 0,
discussContent: ""
}
const queueItemData = { sid, uuid, payload, name, size, currentFileId, uploadType, pieces, chunkSize, filePath, currentCreatedByUsn, baseUrl, uploadLimit, uploadSpeed }
// taskDataArr.push({ filePath, name, uuid, size, pieces, uploadType, diskType, parentid: currentFileId == -2 ? -1 : currentFileId || -1, fileRealPath: realPath })
taskDataArr.push({ filePath, name, uuid, size, pieces, uploadType, diskType, parentid: currentFileId == -2 ? -1 : currentFileId || -1, fileRealPath: realPath })
queueData.push(queueItemData)

}
completeStatus = {
status: 'updateStore'
}
self.postMessage({taskDataArr, completeStatus})
}
```

TomeWong

Apr 29, 2020

是否转换字符串来传输，而不是数组对象

wednesdayco

Apr 29, 2020

分……片……

TomeWong

Apr 29, 2020

@wednesdayco 现在都是小文件，可以正常上传，但将 web worker 中处理的信息回传至 worker 主进程，更新至 vuex 有问题，vuex 是不是存在存储大小限制的问题

Vegetable

Apr 29, 2020

显然这是递归层数过多
你是一个一个上传, 一个文件成功之后, 回调里传下一个吗?

Vegetable

Apr 29, 2020

let deep = 1

function c() {
deep++
c()
}

try {
c()
} catch (error) {
console.log(error)
//RangeError: Maximum call stack size exceeded
console.log(deep)
//15712
}

TomeWong

Apr 29, 2020

@Vegetable 是一个一个上传的，并发量为 3，上传是正常的，在上传前会先根据每条文件的路径获取一些信息，然后再将这些信息通过 postMessage 回传至 worker 主进程，在 worker 主进程将这些处理的信息更新至 vuex 中，这个更新过程出现了问题

VDimos

Apr 29, 2020 via Android

你这递归层级太多了吧，做下尾递归优化，不要保留递归栈。

MrYELiex

Apr 29, 2020

错误信息很明显调用栈过多

TomeWong

Apr 29, 2020

@VDimos 在 vuex 中使用 map 来处理，可能会有问题