Uploading Image to Firebase in React Native
Solution 1
What the error says is that you need to use a blob. You can use react-native-fetch-blob: https://github.com/wkh237/react-native-fetch-blob
Check out this example: https://github.com/dailydrip/react-native-firebase-storage/blob/master/src/App.js#L43-L69
Solution 2
I am posting my code since this was a bit frustrating for me:
To upload images to firebase.storage you need to upload the images as Blobs. If you don't know what Blobs are, don't worry: BLOB stands for Binary Large OBject.
Step 1.
npm install --save react-native-fetch-blob
Step 2.
// copy and paste this code where you will handle the file upload
import RNFetchBlob from 'react-native-fetch-blob'
const Blob = RNFetchBlob.polyfill.Blob;
const fs = RNFetchBlob.fs;
window.XMLHttpRequest = RNFetchBlob.polyfill.XMLHttpRequest;
window.Blob = Blob;
Step 3.
// The uploadImage function that you are going to use:
function uploadImage(uri, mime = 'image/jpeg', name) {
return new Promise((resolve, reject) => {
let imgUri = uri; let uploadBlob = null;
const uploadUri = Platform.OS === 'ios' ? imgUri.replace('file://', '') : imgUri;
const { currentUser } = firebase.auth();
const imageRef = firebase.storage().ref(`/jobs/${currentUser.uid}`)
fs.readFile(uploadUri, 'base64')
.then(data => {
return Blob.build(data, { type: `${mime};BASE64` });
})
.then(blob => {
uploadBlob = blob;
return imageRef.put(blob, { contentType: mime, name: name });
})
.then(() => {
uploadBlob.close()
return imageRef.getDownloadURL();
})
.then(url => {
resolve(url);
})
.catch(error => {
reject(error)
})
})
}
So how do you call this function?
Pass the URI of the image as the first argument. In my case img1, img2, img3
where variables that pointed to the URIs of the images, that I wanted to upload which were on my phone. They looked something like '/Phone/Pics/imageToUpload.jpeg'
, etc.
As the second argument you can pass 'image/jpeg'
and the last argument is the name that you want to give the image. Chose the name that you like.
But what if I have several images and want to upload them and want to handle the upload correctly. What if one upload succeeds and the other does not?
Do this then:
let imgPromises = [];
imgPromises.push(uploadImage(img1, 'image/jpeg', 'imageOne'));
imgPromises.push(uploadImage(img2, 'image/jpeg', 'imageTwo'));
imgPromises.push(uploadImage(img3, 'image/jpeg', 'imageOne'));
Promise.all(imgPromises).then(urls => {
// ALL IMAGES SUCCEEDED and you will get an array of URIS that you can save to your database for later use!
}).catch(error => {
// One OR many images failed the upload. Give feedback to someone.
})
Solution 3
You can use react-native-firebase to upload image to storge https://rnfirebase.io/
const storage = firebase.storage();
const sessionId = new Date().getTime();
const imageRef = storage.ref('images').child(`${sessionId}`);
return imageRef.putFile(uri);
Solution 4
So far this is the best method I found to upload a file/image to a Firebase Storage with React Native. This method does not use any third party libraries except for the Expo SDK.
-
Get the File URI of the image to upload. To do this we will need to use Expo ImagePicker. The best place to include this code block is on to a button with an
onPress
handler.ImagePicker.launchImageLibraryAsync({ mediaTypes: "Images" }).then((result)=>{ if (!result.cancelled) { // User picked an image const {height, width, type, uri} = result; return uriToBlob(uri); // will follow later } })
-
Generate a BLOB from the image URI. There are a lot of third party libraries to help do this. But if you don't want to install a library, then you can use XMLHttpRequest. The React Native docs recommends we use the Fetch API, but right now we can't use it because it will throw an error that we can only fetch
https://
urls, but our URI is afile://
. There is a way to get pass this, but using XMLHttpRequest will make things a lot simpler.uriToBlob = (uri) => { return new Promise((resolve, reject) => { const xhr = new XMLHttpRequest(); xhr.onload = function() { // return the blob resolve(xhr.response); }; xhr.onerror = function() { // something went wrong reject(new Error('uriToBlob failed')); }; // this helps us get a blob xhr.responseType = 'blob'; xhr.open('GET', uri, true); xhr.send(null); }); }
-
We have our BLOB, let's upload it to Firebase. This part is pretty straightforward as explained in the Firebase Docs.
uploadToFirebase = (blob) => { return new Promise((resolve, reject)=>{ var storageRef = firebase.storage().ref(); storageRef.child('uploads/photo.jpg').put(blob, { contentType: 'image/jpeg' }).then((snapshot)=>{ blob.close(); // let's free up the blob resolve(snapshot); }).catch((error)=>{ reject(error); }); }); }
That's it, you can now upload a file to Firebase Storage. The key part to this is getting a File URI and converting it to a BLOB. You can read more about this method here.
Solution 5
For some time I used the Firebase JS SDK with React Native. Using this library, as referred in this thread you need to use a library like rn-fetch-blob (react-native-fetch-blob is not maintained anymore) in order to provide a blob to Firebase Storage put() method.
Recently I started using React Native Firebase. As they say in their website "Using the native Firebase SDKs with React Native Firebase allows you to consume device SDKs which don't exist on the Firebase JS SDK".
Using React-Native-Firebase you don't need any extra library to upload images to Firebase Storage, and your code gets much cleaner:
export const uploadImage = (path, mime = 'application/octet-stream') => {
return new Promise((resolve, reject) => {
const imageRef = firebase.storage().ref('images').child('filename.jpg');
return imageRef.put(path, { contentType: mime })
.then(() => {
return imageRef.getDownloadURL();
})
.then(url => {
resolve(url);
})
.catch(error => {
reject(error);
console.log('Error uploading image: ', error);
});
});
};
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maxwellgover
Updated on January 27, 2022Comments
-
maxwellgover about 2 years
I have two image paths in my component state
I try to upload one of the images inside of a function but get an error:
Firebase Storage: Invalid argument in 'put' at index 0: Expected Blob or file
and my function
submitImages = () => { // Upload images to Firebase storage let user = firebaseAuth.currentUser; let imagesRef = storageRef.child('productImages/' + user.uid); imagesRef.put(this.state.imageFront).then(snapshot => { console.log('Uploaded ' + this.state.imageFront); }); }
What should I be doing instead to get these images up to Firebase. Thanks!
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chazefate over 6 yearshey, blob doesn't work in EXPO. Is there any other way?
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Franzé Jr. over 6 yearsNo use EXPO it's the only way probably? I think EXPO is limited on that part. Wondering if they have some library to help us with that. If not, just not use it.
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Christopher Rivera over 6 yearsif you use expo check this link: forums.expo.io/t/expo-and-uploading-image-blobs/227/20
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ridoansaleh about 5 yearsIs there a
window
in React Native ? -
Walter Monecke about 5 years@ridoansaleh yes
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sudo almost 5 yearsI gave up on Expo long ago. It's incompatible with half the deps I use.
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james murphy over 4 yearsHow do you import?......import { window } from 'react-native'; ? When I run code I get "Cannot set property 'XMLHttpRequest' of undefined" (referring to window)
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Walter Monecke over 4 yearsHmm, that is odd. You don't need to import it. console.log
RNFetchBlob.polyfill
and check thatXMLHttpRequest
is defined. -
Sandmountain over 4 yearsThank you for this. This is probably the best answer in this post because it doesn't use any other libraries. Just to add, if people are as stupid as I'm, don't forget that the uriToBlob function returns a promise, i.e uriToBlob(response.uri).then(blob => this.setState({photoData: blob})); or something :)