如何在react.js中实现jszip [英] How to implement jszip in react.js

问题描述

我正在尝试通过http请求发送之前压缩文件列表.但是我被困在这里.

I am trying to zip a list of files before sending out through the http request. But I got stuck here.

export default function zipTargetFiles(files) {
    if (files.length <= 1) {
        return files;
    } else {
        const zip = require('jszip')();
        for (let i = 0; i < files.length; i++) {
            zip.file(files[i].name, files[i]);
    }
    return zip.generateAsync({type:"blob"});
}

}

基本上，该函数接收文件列表，然后尝试将它们压缩为一个单独的.zip文件.但是，当我将其作为格式数据发送出去时，出现了错误，即提交的数据不是文件.

Basically, the function takes in a list of files and tries to zip them into one single .zip file. But when i send it out as formed data, it gave the error that the submitted data was not a file.

我检查了标头中的有效负载，并且目标字段为[object Promise].如何真正返回.zip文件?

I checked the payload in the header and the target field is as [object Promise]. How do I to truly return a .zip file?

现在，我可以在Redux-saga中捕获该zip文件，但是当我将其保存在数据库中时，它没有给出扩展名，而是仅将其命名为"blob".

Now I am able to catch the zip file in Redux-saga but it doesn't give an extension when I saved it in my database, instead it only give the name as 'blob'.

saga.js

const file = yield call(zipTargetFiles, files);
const formData = new FormData();
formData.append("coversheet", file);
const reponse = yield call(apiRequest, formData);

推荐答案

发生的事情是.generateAsync正在返回承诺.您必须等到兑现诺言或兑现诺言之后，才能使用数据.

Whats happening is that .generateAsync is returning a promise. You will have to wait until the promise is either fulfilled or rejected before being able to work with the data.

Promise是JS中使用异步操作时的核心概念.您可以在此处阅读有关承诺的更多信息

Promises is a core concept in JS when working with async operations. You can read more about promises here

import zipTargetFiles from '/path'

zipTargetFiles( data ).then(file => {
 // Access your file here
})

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