How to send an image to an api in dart/flutter?
The simplest method would be to post a multipart request like in this post and then post it to the server.
Make sure to import these in the beginning of the file:
import 'package:path/path.dart';
import 'package:async/async.dart';
import 'dart:io';
import 'package:http/http.dart' as http;
import 'dart:convert';
Add this class somewhere in your code:
upload(File imageFile) async {
// open a bytestream
var stream = new http.ByteStream(DelegatingStream.typed(imageFile.openRead()));
// get file length
var length = await imageFile.length();
// string to uri
var uri = Uri.parse("http://ip:8082/composer/predict");
// create multipart request
var request = new http.MultipartRequest("POST", uri);
// multipart that takes file
var multipartFile = new http.MultipartFile('file', stream, length,
filename: basename(imageFile.path));
// add file to multipart
request.files.add(multipartFile);
// send
var response = await request.send();
print(response.statusCode);
// listen for response
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
}
Then upload using:
upload(File(filePath));
In your code:
void onTakePictureButtonPressed() {
takePicture().then((String filePath) {
if (mounted) {
setState(() {
imagePath = filePath;
videoController?.dispose();
videoController = null;
});
// initiate file upload
Upload(File(filePath));
if (filePath != null) showInSnackBar('Picture saved to $filePath');
}
});
}
If you are sending the image to PHP Laravel Server. Try reducing the size of the image
while sending it to the server. I used Image Picker package to reduce the size of the image.
var image = await ImagePicker.pickImage(source: imageSource, imageQuality: 50, maxHeight: 500.0, maxWidth: 500.0);
Then create a multipart file with that image, add it to form data, and send the form data to the server using post request with dio
library. See @Elialber Lopes
answer for sending the data.
It worked for me.
import 'package:dio/dio.dart'; //From 3.x.x version
uploadImage(){
var formData = FormData();
formData.files.add(MapEntry("Picture", await MultipartFile.fromFile(data.foto.path, filename: "pic-name.png"), ));
var response = await dio.client.post('v1/post', data: formdata);
}