How to send Images through Multipart in Flutter - flutter

Question

I want to send three images to my server. I have tried following. There are no errors, no exception but I can't send pictures to the server. Can you help me where I am making the error?
File? image1;
I am picking images from gallery
Future pickImage1() async {
try {
final image = await ImagePicker().pickImage(source: ImageSource.gallery,imageQuality: 75);
if (image == null) return;
final imagePermanent = await saveImagePermanently(image.path);
setState(() => image1 = imagePermanent);
} on PlatformException catch (e) {
print('failed to pick image $e');
}
}
It's how I am trying to send images to the server
uploadImage1(File imageFile1,File imageFile2, File imageFile3 ) async {
var postUri = Uri.parse("https://my link");
var request = http.MultipartRequest('POST', postUri);
request.files.add( http.MultipartFile.fromBytes("image1", imageFile1.readAsBytesSync(), filename: "Photo1.jpg", ));
request.files.add( http.MultipartFile.fromBytes("image2", imageFile1.readAsBytesSync(), filename: "Photo2.jpg", ));
request.files.add( http.MultipartFile.fromBytes("image3", imageFile1.readAsBytesSync(), filename: "Photo3.jpg", ));
await request.send().then((response) {
if (response.statusCode == 200)
{
print("Uploaded");
}
else {
print('error');
}
});
}
what I got in my console is
error
Here is the button where I call this function
ElevatedButton(
onPressed: () {
uploadImage1(image1!, image2!, image3!);
print('pressed');
},
child: const Text(' upload '),
),

Answer 1

Do not use both await and then together. Just use await to wait for the execution of the asynchronous function to finish.
final response = await request.send();
if (response.statusCode == 200) {
print("Uploaded");
} else {
print('error');
}

Answer 2

I have a sample code that uploads local images to Pl#nNet, it can be of any help to you, the output for that sample code is like this:
Start fetching...
Fetching done!
{query: {project: all, images: [dc5f659df9a4bcf90fc109830564d821], organs: [leaf],
...
{id: 6411486}}], version: 2022-02-14 (5.1), remainingIdentificationRequests: 197}
Done!