Develop Reference

Expo Camera Photo Upload To Firebase Storage is undefined - React Native

I am using import { Camera } from 'expo-camera'; to take pictures. The taken picture is stored in the devicecache. so far so good.
Now I am trying to upload this taken images to Google Firebase Storage using import { getStorage, ref, uploadBytes } from "firebase/storage";
The return of doing a photo is:
{
"width":5472,
"uri":"file:///data/user/0/host.exp.exponent/cache/ExperienceData/%2540g1sm0%252Feprojstant/Camera/3689f575-d849-4e3e-b4ea-1ba40b96cf02.jpg",
"height":7296
}
Now I try to upload this like that:
const storageRef = ref(storage, 'some-child');
const file = photo.uri
uploadBytes(storageRef, file).then((snapshot) => {
console.log('Uploaded a blob or file!');
});
After a little delay, there is a file created in firebase/storage . I can open this file by an texteditor. the file includes the text undefined
The assumption is that the uri that i hand over is not the right solution. However, I'm too new to development and can't find any help for react native. do you have an idea, a link or an example? Do I first have to convert the file to a blob or base64 and if so, how?

Everytime after I post a Question, I do find the solution.
I blob the file like that:
const blob = await new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.onload = function () {
resolve(xhr.response);
};
xhr.onerror = function (e) {
console.log(e);
reject(new TypeError("Network request failed"));
};
xhr.responseType = "blob";
xhr.open("GET", uri, true);
xhr.send(null);
});
and uploaded this result like this:
uploadBytes(storageRef, blob).then((snapshot) => {
console.log('Uploaded a blob or file!');
});
Here is the full function for my solution:
const [hasPermission, setHasPermission] = useState(null);
const [type, setType] = useState(Camera.Constants.Type.back);
const [previewVisible, setPreviewVisible] = useState(false)
const [capturedImage, setCapturedImage] = useState(null)
let camera = Camera
const __takePicture = async () => {
if (!camera) return
const photo = await camera.takePictureAsync()
setPreviewVisible(true)
setCapturedImage(photo)
// Create a root reference
const storage = getStorage();
const uri = photo.uri
const blob = await new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.onload = function () {
resolve(xhr.response);
};
xhr.onerror = function (e) {
console.log(e);
reject(new TypeError("Network request failed"));
};
xhr.responseType = "blob";
xhr.open("GET", uri, true);
xhr.send(null);
});
// TODO: UUID #some-child
const storageRef = ref(storage, 'some-child');
uploadBytes(storageRef, blob).then((snapshot) => {
console.log('Uploaded a blob or file!');
});
}
useEffect(() => {
(async () => {
const { status } = await Camera.requestCameraPermissionsAsync();
setHasPermission(status === 'granted');
})();
}, []);
if (hasPermission === null) {
return <View />;
}
if (hasPermission === false) {
return <Text>No access to camera</Text>;
}
return (YOUR VIEW RENDERING HERE)

Uploading image to firebase using expo react-native

I am working on an app and I am using expo, I want to make sure each user can upload an image to firebase, and later publish this image on the profile page.
Using expo this is how I upload images:
const pickImage = async () => {
let pickerResult = await ImagePicker.launchImageLibraryAsync({
mediaTypes: ImagePicker.MediaTypeOptions.All,
allowsEditing: true,
aspect: [4, 3],
quality: 1,
});
console.log(pickerResult);
handleImagePicked(pickerResult);
};
the result in the console is:
Object {
"cancelled": false,
"height": 312,
"type": "image",
"uri": "file:///data/user/0/host.exp.exponent/cache/ExperienceData/%2540anonymous%252Fallergyn-app-77bfd368-65fd-43f9-8c34-9c35cef42c25/ImagePicker/daaa229c-c352-4994-ae18-ca2dbb3534ce.jpg",
"width": 416,
}
and this is how I upload to the firebase:
const handleImagePicked = async (pickerResult) => {
try {
if (!pickerResult.cancelled) {
setImage(pickerResult.uri);
await uploadImageAsync(pickerResult.uri);
console.log("done");
}
} catch (e) {
console.log(e);
alert("Upload failed, sorry :(");
} finally {
}
};
async function uploadImageAsync(uri) {
const blob = await new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.onload = function () {
resolve(xhr.response);
};
xhr.onerror = function (e) {
console.log(e);
reject(new TypeError("Network request failed"));
};
xhr.responseType = "blob";
xhr.open("GET", uri, true);
xhr.send(null);
});
const ref = firebase
.storage()
.ref()
.child("images" + Math.random());
const snapshot = await ref.put(blob);
// We're done with the blob, close and release it
blob.close();
return await snapshot.ref.getDownloadURL();
}
this code works it saves the path of the image this: "file:///data/user/0/host.exp.exponent/cache/ExperienceData/%2540anonymous%252Fallergyn-app-77bfd368-65fd-43f9-8c34-9c35cef42c25/ImagePicker/daaa229c-c352-4994-ae18-ca2dbb3534ce.jpg" in the firebase under user collection using the uid of the user.
I am not sure if this is good, because I want to make sure the image itself is uploaded to firebase, I saw some threads in StackOverflow regarding this issue either too old or no answers, so I am hoping to get some sort of solution to what I need to do.
if I use
const ref = firebase
.storage()
.ref()
.child("images" + Math.random());
.putFile(uri);
this tells me that putFile is not a function. the same with put(uri)

Try this one. This function returns the path of the saved image from firebase which you will store in the user's document instead.
const handleImagePicked = async (pickerResult) => {
if (!pickerResult.cancelled) {
setImage(pickerResult.uri);
const result = await uploadImageAsync(pickerResult.uri);
if(result) {
console.log('success');
//save the result path to firestore user document
return;
}
alert("Upload failed, sorry :(");
}
};
export const uploadImageAsync = async (uri: string) => {
let filename = uri;
if (Platform.OS === 'ios') {
filename = uri.replace('file:', '');
}
const ext = filename.split('.').pop();
const path = `images/${id}.${ext}`;
const ref = firebase.storage().ref(path);
try {
const response = await fetch(filename);
const blob = await response.blob();
await ref.put(blob);
return path;
} catch {
return null;
}
};

This worked for me , using rn-fetch-blob
import launchImageLibrary from 'react-native-image-picker';
import RNFetchBlob from 'rn-fetch-blob';
import storage from '#react-native-firebase/storage';
const pickImage = () => {
let options = {
mediaType: 'photo',
quality: 0.5,
};
launchImageLibrary(options, (response) => {
console.log('Response = ', response);
uploadImagePicked(response);
});
};
const uploadImagePicked = (response) => {
if (response.fileName) {
const fileName = response.fileName;
var storageRef = storage().ref(`receiptImages/${fileName}`);
RNFetchBlob.fs.readFile(response.uri , 'base64')
.then(data => {
storageRef.putString(data, 'base64', {contentType:"image/jpg"})
.on(
storage.TaskEvent.STATE_CHANGED,
snapshot => {
console.log("snapshot: " + snapshot.state);
console.log("progress: " + (snapshot.bytesTransferred / snapshot.totalBytes) * 100);
if (snapshot.state === storage.TaskState.SUCCESS) {
console.log("Success");
}
},
error => {
console.log("image upload error: " + error.toString());
},
() => {
storageRef.getDownloadURL()
.then((downloadUrl) => {
console.log("File available at: " + downloadUrl);
})
})
})
.catch(error => {
console.log(error);
})
}
else {
console.log("Skipping image upload");
}
}

trigger a function to run before running the function that's called

I have 3 functions. One takes picture, one compresses image, one uploads an image.
Button is pressed to take picture (this works fine)
Another button is pressed to upload picture but first it runs the compress image and then uploads it but I'm hitting error of ReadableNativeMap cannot be cast to java.lang.String which does help me much. Am I not passing the values correctly?
//Take picture
const takePicture = async () => {
if (cameraRef.current) {
const options = { quality: 1, base64: true, skipProcessing: true };
const result = await cameraRef.current.takePictureAsync(options);
setImageResult(result.uri);
}
};
//compression image
const compressimagestuff = async (uncompressedImage) => {
const manipResult = ImageManipulator.manipulateAsync(
uncompressedImage,
{ compress: 0.3, format: ImageManipulator.SaveFormat.JPEG }
);
return manipResult.url;
};
// uploading it to firebase
const uploadImageAsync = async (uncompressedImage) => {
let compressedImageUrl = compressimagestuff(uncompressedImage);
const blob = await new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.onload = function () {
resolve(xhr.response);
};
xhr.onerror = function (e) {
console.log(e);
reject(new TypeError('Network request failed'));
};
xhr.responseType = 'blob';
xhr.open('GET', compressedImageUrl, true);
xhr.send(null);
});
const ref = firebase
.storage()
// the file that it will get saved to
.ref('Front/')
// giving it a unique name
.child(await uuid.v4())
const snapshot = await ref.put(blob);
blob.close();
return await snapshot.ref.getDownloadURL();
};
Button that is called to upload the picture taken
const uploadPreviewButton = () => (
<TouchableOpacity disabled={wasPressed} onPress={() => { uploadImageAsync(imageResult); setWasPressed(true); }} style={[styles.uploadButton, wasPressed ? { backgroundColor: 'red'} : {} ]}>
<Icon ...>
</TouchableOpacity>
);

compressimagestuff is an async function but you don't wait for it. Change this:
const uploadImageAsync = async (uncompressedImage) => {
let compressedImageUrl = compressimagestuff(uncompressedImage);
to:
const uploadImageAsync = async (uncompressedImage) => {
let compressedImageUrl = await compressimagestuff(uncompressedImage);
// ^

How should customRequest be set in the Ant Design Upload component to work with an XMLHttpRequest?

I have a complete mess of a component. Right now I pass a function I have been trying a million things I can not make it work.
export default class DatafileUpload extends Component {
initialState = {
fileUploading: false,
fileList: [],
status: 'empty', // 'empty' | 'active' | 'success' | 'exception'
file: {}
}
state = this.initialState
static propTypes = {
userId: PropTypes.string.isRequired,
datasetId: PropTypes.string.isRequired
}
scrubFilename = (filename) => filename.replace(/[^\w\d_\-.]+/ig, '')
requestSignedS3Url = (file) => {
const filename = this.scrubFilename(file.name)
const params = {
userId: this.props.userId,
contentType: file.type,
Key: `${filename}`
};
return api.get('/s3/signUpload', { params })
.then(response => {
return response.data;
})
.catch(error => {
console.error(error);
});
}
uploadFile = (file) => {
this.requestSignedS3Url(file)
.then(signResult => this.uploadToS3(file, signResult))
.catch(error => console.log(error))
}
createCORSRequest = (method, url, opts) => {
opts = opts || {};
let xhr = new XMLHttpRequest();
if (xhr.withCredentials != null) {
xhr.open(method, url, true);
if (opts.withCredentials != null) {
xhr.withCredentials = opts.withCredentials;
}
} else if (typeof XDomainRequest !== "undefined") {
xhr = new XDomainRequest();
xhr.open(method, url);
} else {
xhr = null;
}
return xhr;
};
stepFunctions = () => {
return {
preprocess: (file) => {
console.log('Pre-process: ' + file.name);
},
onProgress: (percent, message, file) => {
this.setState({ fileUploading: true })
console.log('Upload progress: ' + percent + '% ' + message);
},
onFinish: (signResult) => {
this.setState({ fileUploading: false })
console.log("Upload finished: " + signResult.publicUrl)
},
onError: (message) => {
this.setState({ fileUploading: false })
console.log("Upload error: " + message);
},
scrubFilename: (filename) => {
return filename.replace(/[^\w\d_\-\.]+/ig, '');
},
onFinishS3Put: (signResult, file) => {
console.log(signResult)
return console.log('base.onFinishS3Put()', signResult.publicUrl);
}
}
}
uploadToS3 = async (file, signResult) => {
const xhr = await this.createCORSRequest('PUT', signResult.signedUrl);
const functions = this.stepFunctions()
functions.preprocess(file)
if (!xhr) {
functions.onError('CORS not supported', file);
} else {
xhr.onload = () => {
if (xhr.status === 200) {
functions.onProgress(100, 'Upload completed', file);
return functions.onFinishS3Put('potatopotato', file);
} else {
return functions.onError('Upload error: ' + xhr.status, file);
}
};
xhr.onerror = () => {
return functions.onError('XHR error', file);
};
xhr.upload.onprogress = (e) => {
let percentLoaded;
if (e.lengthComputable) {
percentLoaded = Math.round((e.loaded / e.total) * 100);
return functions.onProgress(percentLoaded, percentLoaded === 100 ? 'Finalizing' : 'Uploading', file);
}
};
}
xhr.setRequestHeader('Content-Type', file.type);
if (signResult.headers) {
const signResultHeaders = signResult.headers
Object.keys(signResultHeaders).forEach(key => {
const val = signResultHeaders[key];
xhr.setRequestHeader(key, val);
})
}
xhr.setRequestHeader('x-amz-acl', 'public-read');
this.httprequest = xhr;
return xhr.send(file);
};
handleChange = ({ file, fileList }) => {
const functions = this.stepFunctions()
functions.preprocess(file)
if (!file) {
functions.onError('CORS not supported', file);
} else {
file.onload = () => {
if (file.status === 200) {
functions.onProgress(100, 'Upload completed', file);
return functions.onFinishS3Put('potatopotato', file);
} else {
return functions.onError('Upload error: ' + file.status, file);
}
};
file.onerror = () => {
return functions.onError('XHR error', file);
};
file.upload.onprogress = (e) => {
let percentLoaded;
if (e.lengthComputable) {
percentLoaded = Math.round((e.loaded / e.total) * 100);
return functions.onProgress(percentLoaded, percentLoaded === 100 ? 'Finalizing' : 'Uploading', file);
}
};
}
console.log('File: ', file)
// always setState
this.setState({ fileList });
}
render() {
const props = {
onChange: this.handleChange,
multiple: true,
name: "uploadFile",
defaultFileList: this.initialState.fileList,
data: this.uploadFile,
listType: "text",
customRequest: ????,
showUploadList: {
showPreviewIcon: true,
showRemoveIcon: true
},
onProgress: ( {percent} ) => {
this.setState({ fileUploading: true })
console.log('Upload progress: ' + percent + '% ' );
},
onError: (error, body) => {
this.setState({ fileUploading: false })
console.log("Upload error: " + error);
},
onSuccess: (body)=> {
console.log(body)
return console.log('base.onFinishS3Put()');
}
};
return (
<Upload {...props} fileList={this.state.fileList}>
<Button>
<Icon type="upload" /> Upload
</Button>
</Upload>
)
}
}
I know this code is a mess that doesn't make sense and have duplicated data all around. I want it to make it work and then clean up/optimse. Basically I am not able to make the component progress bar update nor with the onChange nor when I am trying to use the customRequest. When is customRequest called? This is not very abundant in explanations... I don't understand how does it do the replacement of Ajax upload.

I was struggling with that as well and then I found your question.
So the way I found to use customRequest and onChange is:
<Upload name="file" customRequest={this.customRequest} onChange={this.onChange}>
<Button>
<Icon type="upload" /> Click to Upload
</Button>
</Upload>
...
onChange = (info) => {
const reader = new FileReader();
reader.onloadend = (obj) => {
this.imageDataAsURL = obj.srcElement.result;
};
reader.readAsDataURL(info.file.originFileObj);
...
};
...
customRequest = ({ onSuccess, onError, file }) => {
const checkInfo = () => {
setTimeout(() => {
if (!this.imageDataAsURL) {
checkInfo();
} else {
this.uploadFile(file)
.then(() => {
onSuccess(null, file);
})
.catch(() => {
// call onError();
});
}
}, 100);
};
checkInfo();
};
There are probably better ways to do it, but I hope that helps you.

I struggled it a lot and find an efficient way to handle this case.
first- you should mess with the customRequest only when you need to change to body and the request type (like using post instead of 'put' or using xml or add another extra header).
for the signing Url you can send in the action prop callback which return a promise with the right Url to upload like:
handleUplaod = (file: any) => {
return new Promise(async (resolve, reject) => {
const fileName = `nameThatIwant.type`;
const url = await S3Fetcher.getPresignedUrl(fileName);
resolve(url);
});
and render like:
render(){
return(
....
<Upload
action={this.handleUplaod}
....
Upload>
the uploader take the url from the action prop.
the onChange method which is provided also will be called any time the status of upload is changed-
onChange# The function will be called when uploading is in progress,
completed or failed.
When uploading state change, it returns:
{ file: { /* ... / }, fileList: [ / ... / ], event: { / ...
*/ }, }
when upload started
you will need to activate the file reader from that.
like:
....
fileReader = new FileReader();
.....
onChange = (info) => {
if (!this.fileReader.onloadend) {
this.fileReader.onloadend = (obj) => {
this.setState({
image: obj.srcElement.result, //will be used for knowing load is finished.
});
};
// can be any other read function ( any reading function from
// previously created instance can be used )
this.fileReader.readAsArrayBuffer(info.file.originFileObj);
}
};
notice when completed stage that event=undefind
To update the UI from the upload events you should use the options variables from customRequest and call them whenever you need.
onSuccess- should be called when you finish uploading and it will change the loading icon to the file name.
onError- will paint the file name filed to red.
onProgress- will update the progress bar and should be called with {percent: [NUMBER]} for updating.
for example in my code-
customRequest = async option => {
const { onSuccess, onError, file, action, onProgress } = option;
const url = action;
await new Promise(resolve => this.waitUntilImageLoaded(resolve)); //in the next section
const { image } = this.state; // from onChange function above
const type = 'image/png';
axios
.put(url, Image, {
onUploadProgress: e => {
onProgress({ percent: (e.loaded / e.total) * 100 });
},
headers: {
'Content-Type': type,
},
})
.then(respones => {
/*......*/
onSuccess(respones.body);
})
.catch(err => {
/*......*/
onError(err);
});
};
waitUntilImageLoaded = resolve => {
setTimeout(() => {
this.state.image
? resolve() // from onChange method
: this.waitUntilImageLoaded(resolve);
}, 10);
};
I used axios but you can use other libraries as well
and the most important part-
render(){
return(
....
<Upload
onChange={this.onChange}
customRequest={this.customRequest}
...>

Angular 2 Synchronous File Upload

I am trying to upload a file to web api which takes the file as byte array using angular 2 application.
I am not able to pass the byte array from angular 2 page to web api. It looks like the File Reader read method is asynchronous. How do I make this as synchronous call or wait for the file content to be loaded before executing the next line of code?
Below is my code
//attachment on browse - when the browse button is clicked
//It only assign the file to a local variable (attachment)
fileChange = (event) => {
var files = event.target.files;
if (files.length > 0) {
this.attachment = files[0];
}
}
//when the submit button is clicked
onSubmit = () => {
//Read the content of the file and store it in local variable (fileData)
let fr = new FileReader();
let data = new Blob([this.attachment]);
fr.readAsArrayBuffer(data);
fr.onloadend = () => {
this.fileData = fr.result; //Note : This always "undefined"
};
//build the attachment object which will be sent to Web API
let attachment: Attachment = {
AttachmentId: '0',
FileName: this.form.controls["attachmentName"].value,
FileData: this.fileData
}
//build the purchase order object
let order: UpdatePurchaseOrder = {
SendEmail: true,
PurchaseOrderNumber: this.form.controls["purchaseOrderNumber"].value,
Attachment: attachment
}
//call the web api and pass the purchaseorder object
this.updatePoService
.updatePurchaseOrder(this.form.controls["purchaseOrderRequestId"].value, order)
.subscribe(data => {
if (data) {
this.saveSuccess = true;
}
else {
this.saveSuccess = false;
}
},
error => this.errors = error,
() => this.res = 'Completed'
);
}
Any hint would be useful.
regards,
-Alan-

You cannot make this async call synchronous. But you can take advantage of the observables to wait for the files to be read:
//when the submit button is clicked
onSubmit = () => {
let file = Observable.create((observer) => {
let fr = new FileReader();
let data = new Blob([this.attachment]);
fr.readAsArrayBuffer(data);
fr.onloadend = () => {
observer.next(fr.result);
observer.complete()
};
fr.onerror = (err) => {
observer.error(err)
}
fr.onabort = () => {
observer.error("aborted")
}
});
file.map((fileData) => {
//build the attachment object which will be sent to Web API
let attachment: Attachment = {
AttachmentId: '0',
FileName: this.form.controls["attachmentName"].value,
FileData: fileData
}
//build the purchase order object
let order: UpdatePurchaseOrder = {
SendEmail: true,
PurchaseOrderNumber: this.form.controls["purchaseOrderNumber"].value,
Attachment: attachment
}
return order;
})
.switchMap(order => this.updatePoService.updatePurchaseOrder(this.form.controls["purchaseOrderRequestId"].value, order))
.subscribe(data => {
if (data) {
this.saveSuccess = true;
} else {
this.saveSuccess = false;
}
},
error => this.errors = error,
() => this.res = 'Completed'
);
}

I arrived here looking for a solution for a similar issue. I'm performing requests to an endpoint which can response a binary blob if anything goes well or a JSON file in event of error.
this.httpClient.post(urlService, bodyRequest,
{responseType: 'blob', headers: headers})
.pipe(map((response: Response) => response),
catchError((err: Error | HttpErrorResponse) => {
if (err instanceof HttpErrorResponse) {
// here, err.error is a BLOB containing a JSON String with the error message
} else {
return throwError(ErrorDataService.overLoadError(err, message));
}
}));
As FileReaderSync apparently doesn't work in Angular6 I took n00dl3's solution (above) to throw the error after parsing the Blob content:
return this.httpClient.post(urlService, bodyRequest,
{responseType: 'blob', headers: headers})
.pipe(map((response: Response) => response),
catchError((err: Error | HttpErrorResponse) => {
const message = `In TtsService.getTts(${locale},${outputFormat}). ${err.message}`;
if (err instanceof HttpErrorResponse) {
const $errBlobReader: Observable<HttpErrorResponse> = Observable.create((observer) => {
const fr = new FileReader();
const errorBlob = err.error;
fr.readAsText(errorBlob, 'utf8');
fr.onloadend = () => {
const errMsg = JSON.parse(fr.result).message;
const msg = `In TtsService.getTts(${locale},${outputFormat}). ${errMsg}`;
observer.error(ErrorDataService.overLoadError(err, msg));
};
fr.onerror = (blobReadError) => {
observer.error(blobReadError);
};
fr.onabort = () => {
observer.error('aborted');
};
});
return $errBlobReader;
} else {
return throwError(ErrorDataService.overLoadError(err, message));
}
}));
Thanks! You really saved my day!