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尝试将图像上传到 Firebase 存储时出错

[英]Error when trying to upload images to Firebase storage

我正在尝试创建一个应用程序,允许用户上传图像并使用 React 和 Firebase 在页面中显示它。

这是导致问题的代码部分:图像变量来自 state

const [image, setImage] = useState("");
const [caption, setCaption] = useState("");
const [progress, setProgress] = useState(0)

function handleChange (e){
    if  (e.target.files[0]){
        setImage(e.target.files[0]);
    }
}
function handleUpload(){
    const uploadTask =  storage.ref('images/${image.name}').put(image)
    uploadTask.on(
        "state_changed",
        (snapshot) => {
            const progress = Math.round(
            (snapshot.bytesTransferred / snapshot.totalBytes) *  100
             );
            setProgress(progress);

           },
           (error) => {
            console.log(error);
            alert(error.message);
            },
            () => {
                storage
                .ref("images")
                .child(image.name)
                .getDownloadURL()
                .then(url => {
                    db.collection("posts").add({
                        timestamp: db.FieldValue.serverTimestamp(),
                        caption : caption,
                        imgUrl: url,
                        userName: username
                    })
                            setProgress(0);
                            setCaption("");
                            setImage(null);
                })
            }

        )
  
}

并且此错误记录在控制台中:

Uncaught 

FirebaseStorageError {code_: "storage/invalid-argument", message_: "Firebase Storage: Invalid argument in `put` at index 0: Expected Blob or File.", serverResponse_: null, name_: "FirebaseError"}code_: "storage/invalid-argument"message_: "Firebase Storage: Invalid argument in `put` at index 0: Expected Blob or File."name_: "FirebaseError"serverResponse_: nullcode: (...)message: (...)name: (...)serverResponse: (...)__proto__: Object
    rethrowCaughtError @ react-dom.development.js:328
    runEventsInBatch @ react-dom.development.js:3336
    runExtractedPluginEventsInBatch @ react-dom.development.js:3537
    handleTopLevel @ react-dom.development.js:3581
    batchedEventUpdates$1 @ react-dom.development.js:21729
    batchedEventUpdates @ react-dom.development.js:798
    dispatchEventForLegacyPluginEventSystem @ react-dom.development.js:3591
    attemptToDispatchEvent @ react-dom.development.js:4311
    dispatchEvent @ react-dom.development.js:4232
    unstable_runWithPriority @ scheduler.development.js:659
    runWithPriority$1 @ react-dom.development.js:11077
    discreteUpdates$1 @ react-dom.development.js:21746
    discreteUpdates @ react-dom.development.js:811
    dispatchDiscreteEvent @ react-dom.development.js:4211

我试图将put(image)更改为put(blob)但它没有用

  1. 该行:
const uploadTask =  storage.ref('images/${image.name}').put(image)

有错误,它应该使用符号` (反引号/反引号)而不是使用单引号'

const uploadTask =  storage.ref(`images/${image.name}`).put(image)

否则,您将创建对文字字符串images/${image.name}的引用,而不是image/value_of_variable_image.jpg可以在此处找到有关模板文字的更多信息

  1. 你还没有告诉我们image变量的内容是什么,我从代码中可以看出你在 function 中调用了一个setState似乎是一个回调,但我没有看到你在哪里调用,你可以从这样的输入中做到这一点:
<input type="file" onChange={handleChange} />

如果您已经在使用它,我建议在 function 之外添加console.log(image)以便在将变量发送到put()之前调试变量的内容。 作为参考,来自console.log(image)的 output 应该是File javascript API的一个实例

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