Ionic 4 Image upload using Angular HTTP - file-upload

Question

I use Ionic 4 and Angular 7 with PHP as Back-end.
I am trying to upload files (images/videos/PDFs/audio).
Is there a general way to send it.
I tried to send image using camera plugin it returns the URI and it works on the app using img tag.
But I can't get the file it self to send it using formData
openCamera() {
const options: CameraOptions = {
quality: 100,
destinationType: this.camera.DestinationType.FILE_URI,
encodingType: this.camera.EncodingType.JPEG,
mediaType: this.camera.MediaType.PICTURE,
sourceType: this.camera.PictureSourceType.PHOTOLIBRARY
};
this.camera.getPicture(options).then((imageData) => {
this.imageData = imageData;
this.image = (<any>window).Ionic.WebView.convertFileSrc(imageData);
// this.image works fine in img tag
this.sendMsg(this.image);
}, (err) => {
// Handle error
alert('error ' + JSON.stringify(err));
});
}
sendMsg(file?) {
const data = new FormData();
data.set('group_id', this.groupId);
data.set('text', this.msg);
if (file) {
data.set('file', this.image);
data.set('text', '');
}
this.messeges.push(data);
this._messengerService.postMsg(data).subscribe(
res => {
console.log('res ', res);
if (res.success === true) {
console.log('data added ', res);
}
}
);
}
I want the use the URI to get the actual file

Answer 1

Ionic Native plugin will return only base64. As per your question, you need to convert formdata. so, You need to convert base64 to formdata externally.
dataURItoBlob(dataURI) {
// convert base64/URLEncoded data component to raw binary data held in a string
var byteString;
if (dataURI.split(',')[0].indexOf('base64') >= 0)
byteString = atob(dataURI.split(',')[1]);
else
byteString = unescape(dataURI.split(',')[1]);
// separate out the mime component
var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];
// write the bytes of the string to a typed array
var ia = new Uint8Array(byteString.length);
for (var i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
return new Blob([ia], { type: mimeString });
}
and
profileUpdate(options) {
this.camera.getPicture(options).then((imageData) => {
let base64Image = 'data:image/jpg;base64,' + imageData;
let data = this.dataURItoBlob(base64Image);
let formData = new FormData();
formData.append('profile', data, "filename.jpg");
//here you pass the formdata to to your API
})