javascript - 无法在 IPCRenderer 中传递对象/数组，无法克隆对象 EventEmitter.i.send.i.send

Question

我无法将任何对象或数组传递给 IPCRenderer。
通过 ipcs 传递对象或数组时出现错误，我什至尝试通过使用 JSON.stringify 转换为字符串来发送，但它会将其转换为空对象字符串。
我试过传递一个文件列表，一个对象数组，甚至一个对象都没有传递。只有字符串或手写对象有效。
我读过它使用结构化克隆算法，并且该算法允许使用 fileList & Array
错误:

electron/js2c/renderer_init.js:74 Uncaught Error: An object could not be cloned.
    at EventEmitter.i.send.i.send (electron/js2c/renderer_init.js:74)
    at HTMLButtonElement.compressNow (ImageHandling.js:190)

我尝试了许多可能的解决方案，但没有任何效果
代码:

const compressNow = () => {
    ipcRenderer.send("image:compress", filess).  ///This is the error.
    // filess is a variable containing an array of selected files from an HTML input.
}

现在我尝试将文件发送为 JSON.stringify ，我试图将它作为一个对象发送，但除非我手动编写一个虚拟对象或字符串，否则没有任何效果。
这是我的 Github Repo for this project
有错误的文件J:-
图像处理.js

const fs = window.require('fs');
const {ipcRenderer} = require("electron")
const SELECT = (target) => document.querySelector(`${target}`)
var filess = []

const imgUploadInput = SELECT("#imgUploadInput")
const warning = SELECT("#warning")

const setImgBase64 = (imgEl, file) => {

    const ReadAbleFile = fs.readFileSync(file.path).toString('base64')
    let src = "data:image/png;base64," + ReadAbleFile

    imgEl.setAttribute("src", src)
    // El.src=src

    // console.log(`FIXED IMAGE # ${imgEl} `,ReadAbleFile)

}
const renderImages = () => {
    const files = filess && Array.from(filess)
    const defaultImg = SELECT("#defaultImg")
    const addImgBtn = SELECT("#addImgBtn")
    imgUploadInput.disabled = true;

    let numOfFiles = files.length

    if (numOfFiles < 1) {
        SELECT("#compressContainer").style.visibility = "hidden"
    } else {
        SELECT("#compressContainer").style.visibility = "visible"
    }
    if (numOfFiles > 49) {
        warning.innerHTML = `<b style="font-weight:bold; color:red;">WARNING:</b><br/> 
                               <span style="padding:10px;text-align:left">
                               Your processor/computer may not be able to process ${numOfFiles} Images at once, We recommend selecting less than 50 Images at once for better performance.
                                </span>
                                `;
    }
    addImgBtn.innerHTML = `LOADING.....`
    if (defaultImg && numOfFiles > 0) 
        defaultImg.remove();
    


    setTimeout(() => {

        if (files && numOfFiles > 0) {
            let displayImages = SELECT("#displayImages")
            displayImages.innerHTML = ""
            files ?. forEach((file, i) => {
                let divEl = document.createElement("div")
                let imgEl = document.createElement("img")
                imgEl.src = file.path

                imgEl.id = `PNG_${i}_${
                    btoa(file.name)
                }`
                divEl.className = "displayedImg"

                imgEl.setAttribute("onclick", `document.getElementById('ImageView').src=this.src`)


                const a = document.createElement("a")
                a.appendChild(imgEl)

                a.setAttribute("href", `#ViewImage`)
                a.className = "perfundo__link"


                divEl.appendChild(a)

                divEl.className = "displayedImg perfundo"

                displayImages.appendChild(divEl)


                if (i == files.length - 1) {
                    warning.innerHTML = "";
                    updateNumOfImages();
                }
                imgEl.onerror = () => setImgBase64(imgEl, file) // converting to base64 only on error, this make performance better and help us avoid freezes. (before this i was converting all images to base64 wither errored or not that was making computer freez)
            })
            addImgBtn.innerHTML = "+ Add MORE"
            imgUploadInput.disabled = false
            findDuplicate()
        }

    }, 0);
}

const hasDuplicate=()=>{
    let FileNames = [... filess.map(f => f.name)]
    let duplicateFiles = filess.filter((file, i) => FileNames.indexOf(file.name) !== i)

    return {FileNames,duplicateFiles,FilesLength:duplicateFiles.length}
}
const findDuplicate = (forceAlert = false) => {
    if (filess && filess.length) {
        let {FileNames} = hasDuplicate()
        let {duplicateFiles} = hasDuplicate()
        if (duplicateFiles.length) { // alert(``)

            let countFiles = duplicateFiles.length
            let fileStr = countFiles > 1 ? "files" : "file"
            console.log("result from removeDup=> ", filess, " \n dupfilename=> ", FileNames, " \n dupfiles=> ", duplicateFiles)

            let shouldNotAsk = localStorage.getItem("NeverAsk")
            let msg = `You've selected ${
                countFiles > 1 ? countFiles : "a"
            } duplicate ${fileStr}`
            let duplInner = `<span style='color:red'> 
                               <b>WARNING</b>
                               <p style="margin:0px;line-height:1">  ${msg} .  <button onClick="findDuplicate(true)" type="button"  class="btn btn-danger btn-rounded  btn-sm">REMOVE DUPLICATE</button></p>
                              </span>`
            if (! shouldNotAsk || forceAlert) {
                swal("DUPLICATE FILES DETECTED", `${msg} , Would you like to un-select duplicate ${fileStr} having same name?`, {
                    icon: 'warning',
                    dangerMode: true,
                    buttons: {
                        cancel: true,
                        ...forceAlert ? {} : {
                            never: "Never Ask"
                        },
                        confirm: "Yes !"
                    }
                }).then((Yes) => {
                    if (Yes == "never") {
                        localStorage.setItem("NeverAsk", true)
                        warning.innerHTML=duplInner

                    } else if (Yes) {
                        removeDuplicates()

                    }
                })
            } else {
                warning.innerHTML=duplInner
            }
        }

    }
}


const removeDuplicates = (showAlert=true) => {
    
    let {FileNames} = hasDuplicate()
    let {duplicateFiles} = hasDuplicate()
    let duplicateFileNames = duplicateFiles.map(f => f.name)
    let uniqueFiles = filess.filter((file) => ! duplicateFileNames.includes(file.name))
    filess = [
        ... uniqueFiles,
        ... duplicateFiles
    ]

    console.log("result from removeDup=> ", filess, " \n filename=> ", FileNames, " \n dupfiles=> ", duplicateFiles, "\n unique fil=> ", uniqueFiles)
    renderImages()
    if(showAlert){
    swal("DONE", "Removed Duplicate Files ", {icon: 'success'}).then(() =>{ 
        renderImages()
        setTimeout(() => {
             let hasDuplicateFiles = hasDuplicate().FilesLength
             if(hasDuplicate){//Re-check if any duplicate files left after the current removal process. 
                 removeDuplicates(false) //Re-run the function to remove remaining. false will make sure that this alert does not show and the loop does not continue.
             }
             renderImages()

        }, 10);
    
    })
   }
}




const updateNumOfImages = () => {
    warning.innerHTML = `
                <span style="text-align:left; color:green">
                        Selected ${
        filess.length
    } Image(s)
                 </span>
                 `;
}


const compressNow = () => {
    ipcRenderer.send("image:compress", filess)
    // alert("WOW")
}


CompressBtn.addEventListener("click", compressNow)

imgUploadInput.addEventListener("change", (e) => {
    let SelectedFiles = e.target.files

    if (SelectedFiles && SelectedFiles.length) {
        filess = [
            ... filess,
            ... SelectedFiles
        ]
        renderImages()
    }
})
// SELECT("#imgUploadInput").addEventListener("drop",(e)=>console.log("DROP=> ",e))

更新:-
我替换了这个:

const compressNow = () => {

        ipcRenderer.send("image:compress",filess)
    
}

进入这个: -

const compressNow = () => {

    filess.forEach(file => {
        ipcRenderer.send("image:compress",file.path )
    });
}

现在我在这里通过forEach一个一个地发送文件，实际上它发送字符串“文件路径”所以它是如何工作的我仍然很困惑为什么我必须这样做？为什么我不能发送整个文件列表我认为这种循环方法是一种不好的做法，因为它会在一个额外的循环中消耗更多的 CPU，但是如果我能够发送整个数组就没有必要了。

Answer 1

见 Behavior Changed: Sending non-JS objects over IPC now throws an exception . DOM 对象等是不​​可序列化的。当发送不可序列化的对象时，Electron 9.0(和更高版本)会抛出“无法克隆对象”错误。
在您的代码中， File 和 FileList 是 DOM 对象。
如果你想避免使用 forEach ，试试这个代码:

const compressNow = () => {
    const paths = filess.map(f => f.path);
    ipcRenderer.send("image:compress", paths);
}