存储的图像保存为 'octet-stream' 而不是 image/jpeg （firebase 和 React Native）

Question

我正在使用相机（react-native-image-Picker）进行选择并将其保存到存储中。这是我的做法。

const saveImage = async () => {
    const id = firebase.firestore().collection('food').doc().id
    const storageRef = firebase.storage().ref()
    const fileRef = storageRef.child(file.fileName) //name of image to store
    await fileRef.put(file) //store image

    firebase.firestore().collection("food").doc(id).update({
      image: firebase.firestore.FieldValue.arrayUnion({
        name: file.fileName,
        url: await fileRef.getDownloadURL()
      })
    })
}

console.log(typeof file);
gives => "object"

console.log(file);
//gives => 
file = {height: 2322, 
uri:"content://com.photodocumentation.imagepickerprovidlib_temp_7a0448df-1fac-4ac7-a47c-402c62ecce4c.jpg", 
width: 4128, 
fileName: "rn_image_picker_lib_temp_7a0448df-1fac-4ac7-a47c-402c62ecce4c.jpg", 
type: "image/jpeg"}

结果：在 Firebase（存储）中，图像被保存为 application/octet-stream 而不是 image/jpeg。图片未显示，从存储中下载时显示未定义。

任何帮助将不胜感激。

Answer 1

Reference#put() 方法接受 Blob、Uint8Array 或 ArrayBuffer。您的“文件”对象似乎不是这些中的任何一个。

相反，我们需要将文件读入内存（使用 react-native-fs - 称为 RNFS），然后上传该数据以及所需的元数据。因为文件被 RNFS 读取为 base64，所以我们将使用 Reference#putString 代替，因为它接受 Base64 字符串进行上传。

const rnfs = require('react-native-fs');

const saveImage = async () => {
  const capture = /* this is your "file" object, renamed as it's not a `File` object */
  const fileRef = firebase.storage().ref(capture.fileName);
  const captureBase64Data = await rnfs.readFile(capture.uri, 'base64');
  const uploadSnapshot = await fileRef.putString(captureBase64Data, 'base64', {
    contentType: capture.type,
    customMetadata: {
      height: capture.height,
      width: capture.width
    }
  });

  // const id = colRef.doc().id and colRef.doc(id).update() can be replaced with just colRef.add() (colRef being a CollectionReference)

  return await firebase.firestore().collection('food').add({
    image: {
      name: capture.fileName,
      url: await fileRef.getDownloadURL()
    }
  });
};

Answer 2

这是我修复它的方法：

const uploadImage = async () => {
    const response = await fetch(file.uri)
    const blob = await response.blob();
    var ref = firebase.storage().ref().child("FolderName");
    return ref.put(blob)
}

存储的图像保存为 'octet-stream' 而不是 image/jpeg （firebase 和 React Native）

Images put to storage are saved as 'octet-stream' rather than image/jpeg (firebase and ReactNative)

javascript

firebase

react-native

firebase-storage

react-native-image-picker