Related
I use a web service for image processing , it works well in Postman:
Now I want to make http request in flutter with Dart:
import 'package:http/http.dart' as http;
static ocr(File image) async {
var url = '${API_URL}ocr';
var bytes = image.readAsBytesSync();
var response = await http.post(
url,
headers:{ "Content-Type":"multipart/form-data" } ,
body: { "lang":"fas" , "image":bytes},
encoding: Encoding.getByName("utf-8")
);
return response.body;
}
but I don't know how to upload the image file, in above code I get exception: Bad state: Cannot set the body fields of a Request with content-type "multipart/form-data".
How should I write the body of request?
Your workaround should work; many servers will accept application/x-www-form-urlencoded as an alternative (although data is encoded moderately inefficiently).
However, it is possible to use dart:http to do this. Instead of using http.post, you'll want to use a http.MultipartFile object.
From the dart documentation:
var request = new http.MultipartRequest("POST", url);
request.fields['user'] = 'someone#somewhere.com';
request.files.add(http.MultipartFile.fromPath(
'package',
'build/package.tar.gz',
contentType: new MediaType('application', 'x-tar'),
));
request.send().then((response) {
if (response.statusCode == 200) print("Uploaded!");
});
I'd like to recommend dio package to you , dio is a powerful Http client for Dart/Flutter, which supports Interceptors, FormData, Request Cancellation, File Downloading, Timeout etc.
dio is very easy to use, in this case you can:
Sending FormData:
FormData formData = new FormData.from({
"name": "wendux",
"file1": new UploadFileInfo(new File("./upload.jpg"), "upload1.jpg")
});
response = await dio.post("/info", data: formData)
More details please refer to dioγ
This can be achieved using the MultipartRequest class (https://pub.dev/documentation/http/latest/http/MultipartRequest-class.html)
Change the media type and uri as needed.
uploadFile() async {
var postUri = Uri.parse("<APIUrl>");
var request = new http.MultipartRequest("POST", postUri);
request.fields['user'] = 'blah';
request.files.add(new http.MultipartFile.fromBytes('file', await File.fromUri("<path/to/file>").readAsBytes(), contentType: new MediaType('image', 'jpeg')))
request.send().then((response) {
if (response.statusCode == 200) print("Uploaded!");
});
}
I found a working example without using any external plugin , this only uses
import 'package:http/http.dart' as http;
import 'dart:io';
import 'package:path/path.dart';
import 'package:async/async.dart';
import 'dart:convert';
Code
var stream =
new http.ByteStream(DelegatingStream.typed(imageFile.openRead()));
// get file length
var length = await imageFile.length(); //imageFile is your image file
Map<String, String> headers = {
"Accept": "application/json",
"Authorization": "Bearer " + token
}; // ignore this headers if there is no authentication
// string to uri
var uri = Uri.parse(Constants.BASE_URL + "api endpoint here");
// create multipart request
var request = new http.MultipartRequest("POST", uri);
// multipart that takes file
var multipartFileSign = new http.MultipartFile('profile_pic', stream, length,
filename: basename(imageFile.path));
// add file to multipart
request.files.add(multipartFileSign);
//add headers
request.headers.addAll(headers);
//adding params
request.fields['loginId'] = '12';
request.fields['firstName'] = 'abc';
// request.fields['lastName'] = 'efg';
// send
var response = await request.send();
print(response.statusCode);
// listen for response
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
How to upload image file using restAPI in flutter/dart.
This work for me.
var postUri = Uri.parse("apiUrl");
http.MultipartRequest request = new http.MultipartRequest("POST", postUri);
http.MultipartFile multipartFile = await http.MultipartFile.fromPath(
'file', filePath);
request.files.add(multipartFile);
http.StreamedResponse response = await request.send();
print(response.statusCode);
Updated 2021 way:
using flutter http and mime
import 'package:mime/mime.dart';
import 'package:http/http.dart' as http;
import 'package:http_parser/http_parser.dart';
import 'dart:io';
Future<dynamic> multipartImageUpload(String baseUrl, String api, File image) async {
var uri = Uri.parse(baseUrl + api);
final mimeTypeData =
lookupMimeType(image.path, headerBytes: [0xFF, 0xD8]).split('/');
// Intilize the multipart request
final imageUploadRequest = http.MultipartRequest('PUT', uri);
// Attach the file in the request
final file = await http.MultipartFile.fromPath('image', image.path,
contentType: MediaType(mimeTypeData[0], mimeTypeData[1]));
imageUploadRequest.files.add(file);
// add headers if needed
//imageUploadRequest.headers.addAll(<some-headers>);
try {
final streamedResponse = await imageUploadRequest.send();
final response = await http.Response.fromStream(streamedResponse);
return response;
} catch (e) {
print(e);
return null;
}
}
Use MultipartRequest class.
How to upload image file using restAPI in flutter/dart
void uploadImage1(File _image) async {
// open a byteStream
var stream = new http.ByteStream(DelegatingStream.typed(_image.openRead()));
// get file length
var length = await _image.length();
// string to uri
var uri = Uri.parse("enter here upload URL");
// create multipart request
var request = new http.MultipartRequest("POST", uri);
// if you need more parameters to parse, add those like this. i added "user_id". here this "user_id" is a key of the API request
request.fields["user_id"] = "text";
// multipart that takes file.. here this "image_file" is a key of the API request
var multipartFile = new http.MultipartFile('image_file', stream, length, filename: basename(_image.path));
// add file to multipart
request.files.add(multipartFile);
// send request to upload image
await request.send().then((response) async {
// listen for response
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
}).catchError((e) {
print(e);
});
}
name spaces:
import 'package:path/path.dart';
import 'package:async/async.dart';
import 'dart:io';
import 'package:http/http.dart' as http;
UPLOAD IMAGE TO SERVER WITH FORM DATA
To upload image to server you need a dio library.
Features:
Authorization (adding token)
Adding extra field like: username, etc
Adding Image to upload
Code example:
import 'package:dio/dio.dart' as dio;
import 'dart:convert';
try {
///[1] CREATING INSTANCE
var dioRequest = dio.Dio();
dioRequest.options.baseUrl = '<YOUR-URL>';
//[2] ADDING TOKEN
dioRequest.options.headers = {
'Authorization': '<IF-YOU-NEED-ADD-TOKEN-HERE>',
'Content-Type': 'application/x-www-form-urlencoded'
};
//[3] ADDING EXTRA INFO
var formData =
new dio.FormData.fromMap({'<SOME-EXTRA-FIELD>': 'username-forexample'});
//[4] ADD IMAGE TO UPLOAD
var file = await dio.MultipartFile.fromFile(image.path,
filename: basename(image.path),
contentType: MediaType("image", basename(image.path)));
formData.files.add(MapEntry('photo', file));
//[5] SEND TO SERVER
var response = await dioRequest.post(
url,
data: formData,
);
final result = json.decode(response.toString())['result'];
} catch (err) {
print('ERROR $err');
}
To add a header and use http multipart with https://pub.dev/packages/multi_image_picker Plugin,
This is the code.
var request = http.MultipartRequest(
'POST', Uri.parse(myurl)
);
//Header....
request.headers['Authorization'] ='bearer $authorizationToken';
request.fields['PropertyName'] = propertyName;
request.fields['Country'] = country.toString();
request.fields['Description'] = des;
request.fields['State'] = state.toString();
request.files.add(http.MultipartFile.fromBytes(
'ImagePaths',
learnImage,
filename: 'some-file-name.jpg',
contentType: MediaType("image", "jpg"),
)
);
var response = await request.send();
print(response.stream);
print(response.statusCode);
final res = await http.Response.fromStream(response);
print(res.body);
To use HTTP and https://pub.dev/packages/image_picker PLUGIN
This is the code
var request = http.MultipartRequest(
'POST', Uri.parse(myurl)
);
request.headers['Authorization'] ='bearer $authorizationToken';
request.fields['PropertyName'] = propertyName;
request.fields['Country'] = country.toString();
request.fields['Description'] = des;
request.fields['State'] = state.toString();
request.files.add(await http.MultipartFile.fromPath(
'ImagePaths',
file.path
)
);
var response = await request.send();
print(response.stream);
print(response.statusCode);
final res = await http.Response.fromStream(response);
print(res.body);
Working Code
String path = userSelectedImagePath;
Map<String, String> data = {
"name": firstName!,
"email": userEmail!
};
String token = await LocaldbHelper().getToken();
Map<String, String> headers = {
'X-Requested-With': 'XMLHttpRequest',
'authorization': 'Bearer $token',
};
var request = http.MultipartRequest(
'POST',
Uri.parse(ApiUrl.updateProfile),
);
request.fields.addAll(data);
request.headers.addAll(headers);
var multipartFile = await http.MultipartFile.fromPath(
'avatar', path); //returns a Future<MultipartFile>
request.files.add(multipartFile);
http.StreamedResponse response = await request.send();
final respStr = await response.stream.bytesToString();
var jsonData = jsonDecode(respStr);
if (response.statusCode == 200) {
// success
} else {
// error
}
Just leaving this here, if anyone is trying to upload a pdf or any other document using MultipartRequest method.
Just add the content type as -
contentType: new MediaType('application', 'pdf')
Good code with Dio and FilePicker for post file on your server. I use flutter for the web.
FilePicker
Dio
First you need writing Dio post method.
Future postImportClient(PlatformFile file) async {
try {
var urlBase = 'your url';
var mfile = MultipartFile.fromBytes(file.bytes!, filename: file.name);
var formData = FormData();
formData.files.add(MapEntry('file', mfile));
await _dio.post(urlBase, data: formData);
} on DioError catch (error) {
throw Exception(error);
}
}
Initial FilePicker and get file.
FilePickerResult? result = await FilePickerWeb.platform.pickFiles();
if (result != null) {
var file = result.files.single;
await client.postImportClient(file);
}
Good luck!
create FormData:
final formDataMap = <String, dynamic>{};
formDataMap["stringKey"] = "string";
List<MultipartFile> multipartImageList = [];
await Future.forEach(imagePaths as List<String>,(String path) async {
final multiPartFile = await MultipartFile.fromFile(
path,
contentType: MediaType("image", "jpeg"),
);
multipartImageList.add(multiPartFile);
});
formDataMap["image[]"] = multipartImageList;
final formData = FormData.fromMap(formDataMap);
With Retrofit & Dio:
#MultiPart()
#POST("{{url}}")
Future<dynamic> uploadFormData(
#Body() FormData formData,
);
With Hearder
upload image
Future uploadImageMedia(File fileImage, String token) async {
final mimeTypeData =
lookupMimeType(fileImage.path, headerBytes: [0xFF, 0xD8]).split('/');
final imageUploadRequest =
http.MultipartRequest('POST', Uri.parse(mainUrlSite + "wp-json/wp/v2/media"));
final file = await http.MultipartFile.fromPath('file', fileImage.path,
contentType: MediaType(mimeTypeData[0], mimeTypeData[1]));
imageUploadRequest.files.add(file);
imageUploadRequest.headers.addAll({
"Authorization": "Bearer " + token
});
try {
final streamedResponse = await imageUploadRequest.send();
streamedResponse.stream.transform(utf8.decoder).listen((value) {
print(value);
return Future.value(value);
});
} catch (e) {
print(e);
}
}
I use Dio library with put method:
var formData = FormData.fromMap({
'simpleParam': 'example',
'file': await MultipartFile.fromFile(filePath, filename: 'file.jpg')
});
var dio = Dio();
dio.options.headers[HttpHeaders.authorizationHeader] = myToken;
var response = new Response(); //Response from Dio
response = await dio.put(myUrl + "/myApi", data: formData);
The result is in response.data
try {
result[HttpKeys.status] = false;
var request = http.MultipartRequest('POST', url);
request.fields.addAll(body);
if (avatar.path.isNotEmpty) {
request.files.add(await http.MultipartFile.fromPath('uploadedImg', avatar.path));
}
request.headers.addAll(headers);
http.StreamedResponse streamResponse = await request.send();
final response = await http.Response.fromStream(streamResponse);
if (response.statusCode == 200) {
var resMap = jsonDecode(response.body);
debugPrint('<== ππππ π¦π‘ π€π¦ππππ€π€ππ¦πππͺ ==>');
// debugPrint(response.body);
result[HttpKeys.status] = true;
result[HttpKeys.message] = resMap[HttpKeys.message];
result[HttpKeys.data] = resMap['data'];
return result;
} else {
var resMap = jsonDecode(response.body);
result[HttpKeys.message] = resMap[HttpKeys.message];
return result;
}
} catch (error) {
result[HttpKeys.message] = error.toString();
return result;
}
With dio I do like this:
Future<void> _uploadFileAsFormData(String path) async {
try {
final dio = Dio();
dio.options.headers = {
'Content-Type': 'application/x-www-form-urlencoded'
};
final file =
await MultipartFile.fromFile(path, filename: 'test_file');
final formData = FormData.fromMap({'file': file}); // 'file' - this is an api key, can be different
final response = await dio.put( // or dio.post
uploadFileUrlAsString,
data: formData,
);
} catch (err) {
print('uploading error: $err');
}
}
I have custom data:
File avatar = File('path/to/file');
Map<String, dynamic> data = {
'name': 'John',
'avatar': avatar
}
How I can send this my data as FormData object to server?
I tried create object of MultipartFile class by looping my data but in my case sending file path as string instance of file. Here is my code:
data.forEach((key, value) {
if (value is File) {
String fileName = value.path.split('/').last;
data.update(key, (value) async {
return await MultipartFile.fromFile(value.path, filename: fileName);
});
}
});
FormData formData = FormData.fromMap(data);
var response = await dio.post("/send", data: formData);
But using Dio I can upload file something like this:
FormData formData = FormData.fromMap({
"name": "wendux",
"age": 25,
"file": await MultipartFile.fromFile(file.path,filename: fileName)
});
Why I can't dynamically add MultipartFile to my Map ?
You are not awaiting for your data
await Future.wait(data.map((k, v){
if(v is File){
v = await MultipartFile.fromFile(value.path, filename: fileName);
}
return MapEntry(k, v);
}));
Please look into My async call is returning before list is populated in forEach loop
You can send it without dio. Here I write the whole code including the libraries and response.Please test the below code becuase in my case dio is not working and your case is very similar to my case.
Just send it with simple http request
import 'package:http/http.dart' as http;
import 'package:http_parser/http_parser.dart';
import 'package:mime/mime.dart';
Map<String, String> headers = {
'Content-Type': 'multipart/form-data',
};
Map jsonMap = {
"name": "wendux",
"age": 25,
};
String imagePath, // add the image path in varible
var request = http.MultipartRequest('POST', Uri.parse(url));
request.headers.addAll(headers);
request.files.add(
http.MultipartFile.fromBytes(
'orderStatusUpdate',
utf8.encode(json.encode(jsonMap)),
contentType: MediaType(
'application',
'json',
{'charset': 'utf-8'},
),
),
);
if (imagePath != null) {
final mimeTypeData = lookupMimeType(imagePath).split('/');
final file = await http.MultipartFile.fromPath('images', imagePath,
contentType: MediaType(mimeTypeData[0], mimeTypeData[1]));
print((mimeTypeData[0].toString())); // tells picture or not
print((mimeTypeData[1].toString())); // return extention
request.files.add(file);
}
http.StreamedResponse streamedResponse = await request.send();
var response = await http.Response.fromStream(streamedResponse);
print(response.statusCode);
print(response.body);
Here is my post method , i can send anything with text format but i need to send a file.
if you can, modify just my code. that is easy for catch problem, thanks
getComp() async {
final Map<String, dynamic> jsondata = {
'employee_id':
'${ScopedModel.of<AppModel>(context, rebuildOnChange: true).employee_id}',
'receiver_id': '${recid.text}',
'subject': '${subject.text}',
'message_body': '${msgbody.text}',
'message_attachment':'${filePath}'
};
var jsonresponse = null;
var response = await http.post(
'example.com/compose',
headers: {
"Accept": "application/json"
},
body: jsondata,
);
if (response.statusCode == 200) {
jsonresponse = json.decode(response.body);
print(jsonresponse);
}else{
print('problem');
}
}
Here is my file path picker
getfile(){
filePath = FilePicker.getFilePath(type: FileType.ANY);
}
if you can, modify this code .
convert it to base64 first and insert it to the database. That's how I did it when we developed an app that pass a file to the database.
i solve my problem with dio, :(
if anyone face then use dio
uploadFile() async {
FormData formData = new FormData.fromMap({
'employee_id':
'546546',
'receiver_id': '${recid.text}',
'subject': '${subject.text}',
'message_body': '${msgbody.text}',
'message_attachment': filePath ==null? 'nothing': await
MultipartFile.fromFile("${filePath}",filename: "$filePath}"),
});
Response response = await Dio().post("example.com", data: formData);
print(response);
}
I use a web service for image processing , it works well in Postman:
Now I want to make http request in flutter with Dart:
import 'package:http/http.dart' as http;
static ocr(File image) async {
var url = '${API_URL}ocr';
var bytes = image.readAsBytesSync();
var response = await http.post(
url,
headers:{ "Content-Type":"multipart/form-data" } ,
body: { "lang":"fas" , "image":bytes},
encoding: Encoding.getByName("utf-8")
);
return response.body;
}
but I don't know how to upload the image file, in above code I get exception: Bad state: Cannot set the body fields of a Request with content-type "multipart/form-data".
How should I write the body of request?
Your workaround should work; many servers will accept application/x-www-form-urlencoded as an alternative (although data is encoded moderately inefficiently).
However, it is possible to use dart:http to do this. Instead of using http.post, you'll want to use a http.MultipartFile object.
From the dart documentation:
var request = new http.MultipartRequest("POST", url);
request.fields['user'] = 'someone#somewhere.com';
request.files.add(http.MultipartFile.fromPath(
'package',
'build/package.tar.gz',
contentType: new MediaType('application', 'x-tar'),
));
request.send().then((response) {
if (response.statusCode == 200) print("Uploaded!");
});
I'd like to recommend dio package to you , dio is a powerful Http client for Dart/Flutter, which supports Interceptors, FormData, Request Cancellation, File Downloading, Timeout etc.
dio is very easy to use, in this case you can:
Sending FormData:
FormData formData = new FormData.from({
"name": "wendux",
"file1": new UploadFileInfo(new File("./upload.jpg"), "upload1.jpg")
});
response = await dio.post("/info", data: formData)
More details please refer to dioγ
This can be achieved using the MultipartRequest class (https://pub.dev/documentation/http/latest/http/MultipartRequest-class.html)
Change the media type and uri as needed.
uploadFile() async {
var postUri = Uri.parse("<APIUrl>");
var request = new http.MultipartRequest("POST", postUri);
request.fields['user'] = 'blah';
request.files.add(new http.MultipartFile.fromBytes('file', await File.fromUri("<path/to/file>").readAsBytes(), contentType: new MediaType('image', 'jpeg')))
request.send().then((response) {
if (response.statusCode == 200) print("Uploaded!");
});
}
I found a working example without using any external plugin , this only uses
import 'package:http/http.dart' as http;
import 'dart:io';
import 'package:path/path.dart';
import 'package:async/async.dart';
import 'dart:convert';
Code
var stream =
new http.ByteStream(DelegatingStream.typed(imageFile.openRead()));
// get file length
var length = await imageFile.length(); //imageFile is your image file
Map<String, String> headers = {
"Accept": "application/json",
"Authorization": "Bearer " + token
}; // ignore this headers if there is no authentication
// string to uri
var uri = Uri.parse(Constants.BASE_URL + "api endpoint here");
// create multipart request
var request = new http.MultipartRequest("POST", uri);
// multipart that takes file
var multipartFileSign = new http.MultipartFile('profile_pic', stream, length,
filename: basename(imageFile.path));
// add file to multipart
request.files.add(multipartFileSign);
//add headers
request.headers.addAll(headers);
//adding params
request.fields['loginId'] = '12';
request.fields['firstName'] = 'abc';
// request.fields['lastName'] = 'efg';
// send
var response = await request.send();
print(response.statusCode);
// listen for response
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
How to upload image file using restAPI in flutter/dart.
This work for me.
var postUri = Uri.parse("apiUrl");
http.MultipartRequest request = new http.MultipartRequest("POST", postUri);
http.MultipartFile multipartFile = await http.MultipartFile.fromPath(
'file', filePath);
request.files.add(multipartFile);
http.StreamedResponse response = await request.send();
print(response.statusCode);
Updated 2021 way:
using flutter http and mime
import 'package:mime/mime.dart';
import 'package:http/http.dart' as http;
import 'package:http_parser/http_parser.dart';
import 'dart:io';
Future<dynamic> multipartImageUpload(String baseUrl, String api, File image) async {
var uri = Uri.parse(baseUrl + api);
final mimeTypeData =
lookupMimeType(image.path, headerBytes: [0xFF, 0xD8]).split('/');
// Intilize the multipart request
final imageUploadRequest = http.MultipartRequest('PUT', uri);
// Attach the file in the request
final file = await http.MultipartFile.fromPath('image', image.path,
contentType: MediaType(mimeTypeData[0], mimeTypeData[1]));
imageUploadRequest.files.add(file);
// add headers if needed
//imageUploadRequest.headers.addAll(<some-headers>);
try {
final streamedResponse = await imageUploadRequest.send();
final response = await http.Response.fromStream(streamedResponse);
return response;
} catch (e) {
print(e);
return null;
}
}
Use MultipartRequest class.
How to upload image file using restAPI in flutter/dart
void uploadImage1(File _image) async {
// open a byteStream
var stream = new http.ByteStream(DelegatingStream.typed(_image.openRead()));
// get file length
var length = await _image.length();
// string to uri
var uri = Uri.parse("enter here upload URL");
// create multipart request
var request = new http.MultipartRequest("POST", uri);
// if you need more parameters to parse, add those like this. i added "user_id". here this "user_id" is a key of the API request
request.fields["user_id"] = "text";
// multipart that takes file.. here this "image_file" is a key of the API request
var multipartFile = new http.MultipartFile('image_file', stream, length, filename: basename(_image.path));
// add file to multipart
request.files.add(multipartFile);
// send request to upload image
await request.send().then((response) async {
// listen for response
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
}).catchError((e) {
print(e);
});
}
name spaces:
import 'package:path/path.dart';
import 'package:async/async.dart';
import 'dart:io';
import 'package:http/http.dart' as http;
UPLOAD IMAGE TO SERVER WITH FORM DATA
To upload image to server you need a dio library.
Features:
Authorization (adding token)
Adding extra field like: username, etc
Adding Image to upload
Code example:
import 'package:dio/dio.dart' as dio;
import 'dart:convert';
try {
///[1] CREATING INSTANCE
var dioRequest = dio.Dio();
dioRequest.options.baseUrl = '<YOUR-URL>';
//[2] ADDING TOKEN
dioRequest.options.headers = {
'Authorization': '<IF-YOU-NEED-ADD-TOKEN-HERE>',
'Content-Type': 'application/x-www-form-urlencoded'
};
//[3] ADDING EXTRA INFO
var formData =
new dio.FormData.fromMap({'<SOME-EXTRA-FIELD>': 'username-forexample'});
//[4] ADD IMAGE TO UPLOAD
var file = await dio.MultipartFile.fromFile(image.path,
filename: basename(image.path),
contentType: MediaType("image", basename(image.path)));
formData.files.add(MapEntry('photo', file));
//[5] SEND TO SERVER
var response = await dioRequest.post(
url,
data: formData,
);
final result = json.decode(response.toString())['result'];
} catch (err) {
print('ERROR $err');
}
To add a header and use http multipart with https://pub.dev/packages/multi_image_picker Plugin,
This is the code.
var request = http.MultipartRequest(
'POST', Uri.parse(myurl)
);
//Header....
request.headers['Authorization'] ='bearer $authorizationToken';
request.fields['PropertyName'] = propertyName;
request.fields['Country'] = country.toString();
request.fields['Description'] = des;
request.fields['State'] = state.toString();
request.files.add(http.MultipartFile.fromBytes(
'ImagePaths',
learnImage,
filename: 'some-file-name.jpg',
contentType: MediaType("image", "jpg"),
)
);
var response = await request.send();
print(response.stream);
print(response.statusCode);
final res = await http.Response.fromStream(response);
print(res.body);
To use HTTP and https://pub.dev/packages/image_picker PLUGIN
This is the code
var request = http.MultipartRequest(
'POST', Uri.parse(myurl)
);
request.headers['Authorization'] ='bearer $authorizationToken';
request.fields['PropertyName'] = propertyName;
request.fields['Country'] = country.toString();
request.fields['Description'] = des;
request.fields['State'] = state.toString();
request.files.add(await http.MultipartFile.fromPath(
'ImagePaths',
file.path
)
);
var response = await request.send();
print(response.stream);
print(response.statusCode);
final res = await http.Response.fromStream(response);
print(res.body);
Working Code
String path = userSelectedImagePath;
Map<String, String> data = {
"name": firstName!,
"email": userEmail!
};
String token = await LocaldbHelper().getToken();
Map<String, String> headers = {
'X-Requested-With': 'XMLHttpRequest',
'authorization': 'Bearer $token',
};
var request = http.MultipartRequest(
'POST',
Uri.parse(ApiUrl.updateProfile),
);
request.fields.addAll(data);
request.headers.addAll(headers);
var multipartFile = await http.MultipartFile.fromPath(
'avatar', path); //returns a Future<MultipartFile>
request.files.add(multipartFile);
http.StreamedResponse response = await request.send();
final respStr = await response.stream.bytesToString();
var jsonData = jsonDecode(respStr);
if (response.statusCode == 200) {
// success
} else {
// error
}
Just leaving this here, if anyone is trying to upload a pdf or any other document using MultipartRequest method.
Just add the content type as -
contentType: new MediaType('application', 'pdf')
Good code with Dio and FilePicker for post file on your server. I use flutter for the web.
FilePicker
Dio
First you need writing Dio post method.
Future postImportClient(PlatformFile file) async {
try {
var urlBase = 'your url';
var mfile = MultipartFile.fromBytes(file.bytes!, filename: file.name);
var formData = FormData();
formData.files.add(MapEntry('file', mfile));
await _dio.post(urlBase, data: formData);
} on DioError catch (error) {
throw Exception(error);
}
}
Initial FilePicker and get file.
FilePickerResult? result = await FilePickerWeb.platform.pickFiles();
if (result != null) {
var file = result.files.single;
await client.postImportClient(file);
}
Good luck!
create FormData:
final formDataMap = <String, dynamic>{};
formDataMap["stringKey"] = "string";
List<MultipartFile> multipartImageList = [];
await Future.forEach(imagePaths as List<String>,(String path) async {
final multiPartFile = await MultipartFile.fromFile(
path,
contentType: MediaType("image", "jpeg"),
);
multipartImageList.add(multiPartFile);
});
formDataMap["image[]"] = multipartImageList;
final formData = FormData.fromMap(formDataMap);
With Retrofit & Dio:
#MultiPart()
#POST("{{url}}")
Future<dynamic> uploadFormData(
#Body() FormData formData,
);
With Hearder
upload image
Future uploadImageMedia(File fileImage, String token) async {
final mimeTypeData =
lookupMimeType(fileImage.path, headerBytes: [0xFF, 0xD8]).split('/');
final imageUploadRequest =
http.MultipartRequest('POST', Uri.parse(mainUrlSite + "wp-json/wp/v2/media"));
final file = await http.MultipartFile.fromPath('file', fileImage.path,
contentType: MediaType(mimeTypeData[0], mimeTypeData[1]));
imageUploadRequest.files.add(file);
imageUploadRequest.headers.addAll({
"Authorization": "Bearer " + token
});
try {
final streamedResponse = await imageUploadRequest.send();
streamedResponse.stream.transform(utf8.decoder).listen((value) {
print(value);
return Future.value(value);
});
} catch (e) {
print(e);
}
}
I use Dio library with put method:
var formData = FormData.fromMap({
'simpleParam': 'example',
'file': await MultipartFile.fromFile(filePath, filename: 'file.jpg')
});
var dio = Dio();
dio.options.headers[HttpHeaders.authorizationHeader] = myToken;
var response = new Response(); //Response from Dio
response = await dio.put(myUrl + "/myApi", data: formData);
The result is in response.data
try {
result[HttpKeys.status] = false;
var request = http.MultipartRequest('POST', url);
request.fields.addAll(body);
if (avatar.path.isNotEmpty) {
request.files.add(await http.MultipartFile.fromPath('uploadedImg', avatar.path));
}
request.headers.addAll(headers);
http.StreamedResponse streamResponse = await request.send();
final response = await http.Response.fromStream(streamResponse);
if (response.statusCode == 200) {
var resMap = jsonDecode(response.body);
debugPrint('<== ππππ π¦π‘ π€π¦ππππ€π€ππ¦πππͺ ==>');
// debugPrint(response.body);
result[HttpKeys.status] = true;
result[HttpKeys.message] = resMap[HttpKeys.message];
result[HttpKeys.data] = resMap['data'];
return result;
} else {
var resMap = jsonDecode(response.body);
result[HttpKeys.message] = resMap[HttpKeys.message];
return result;
}
} catch (error) {
result[HttpKeys.message] = error.toString();
return result;
}
Here is the code where I am passing Image, route which may be like '/register', and data which is Map<String, String> like data={'directory':'profile'}.
For Uploading Image to Laravel API, Authorization in header is compulsory otherwise it would return "You don't have permission to access this resource". I am passing token as EMPTY string like String token='' as I am uploading
Image at user registration time
This Authorization for read and write is defined in domainurl/public/.htaccess file, you can change it
Try to understand the below code and all the issue would be resolve.
Future uploadImage({
required XFile file,
required String route,
required Map<String, String> data,
}) async {
String url = API_Url + route;
final uri = Uri.parse(url);
try {
http.MultipartRequest request = http.MultipartRequest("POST", uri);
http.MultipartFile multipartFile =
await http.MultipartFile.fromPath('image', file.path);
request.files.add(multipartFile);
request.headers.addAll(_header());
request.fields.addAll(data);
var streamedResponse = await request.send();
var response = await http.Response.fromStream(streamedResponse);
print(jsonDecode(response.body));
return jsonDecode(response.body);
} catch (e) {
return null;
}
}
_header() {
return {"Content-Type": "multipart/form-data",
'Authorization': 'Bearer ${token}',
};
}
With dio I do like this:
Future<void> _uploadFileAsFormData(String path) async {
try {
final dio = Dio();
dio.options.headers = {
'Content-Type': 'application/x-www-form-urlencoded'
};
final file =
await MultipartFile.fromFile(path, filename: 'test_file');
final formData = FormData.fromMap({'file': file}); // 'file' - this is an api key, can be different
final response = await dio.put( // or dio.post
uploadFileUrlAsString,
data: formData,
);
} catch (err) {
print('uploading error: $err');
}
}
I would like to upload a image, I am using http.Client() for making requests,
static uploadImage(String id, File file) {
var httpClient = createHttpClient();
Map<String, String> headers = new Map<String, String>();
headers.putIfAbsent("Authorization", () => "---");
headers.putIfAbsent("Content-Type", () => "application/json");
var body=new List();
body.add(id.)
httpClient.post(URL_UPLOADIMAGE,headers: headers,body: ,encoding: )
}
What should be the body and encoding part for the request ?
Use MultipartRequest class
Upload(File imageFile) async {
var stream = new http.ByteStream(DelegatingStream.typed(imageFile.openRead()));
var length = await imageFile.length();
var uri = Uri.parse(uploadURL);
var request = new http.MultipartRequest("POST", uri);
var multipartFile = new http.MultipartFile('file', stream, length,
filename: basename(imageFile.path));
//contentType: new MediaType('image', 'png'));
request.files.add(multipartFile);
var response = await request.send();
print(response.statusCode);
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
}
name spaces:
import 'package:path/path.dart';
import 'package:async/async.dart';
import 'dart:io';
import 'package:http/http.dart' as http;
The easiest way is to use the http library,
import 'dart:io';
import 'package:http/http.dart' as http;
_asyncFileUpload(String text, File file) async{
//create multipart request for POST or PATCH method
var request = http.MultipartRequest("POST", Uri.parse("<url>"));
//add text fields
request.fields["text_field"] = text;
//create multipart using filepath, string or bytes
var pic = await http.MultipartFile.fromPath("file_field", file.path);
//add multipart to request
request.files.add(pic);
var response = await request.send();
//Get the response from the server
var responseData = await response.stream.toBytes();
var responseString = String.fromCharCodes(responseData);
print(responseString);
}
Checkout the body in submitForm() method.
File _image;
Future cameraImage() async {
var image = await ImagePicker.pickImage(
source: ImageSource.camera,
maxHeight: 240.0,
maxWidth: 240.0,
);
setState(() {
_image = image;
});
}
submitForm() async {
final response = await http.post(
uri,
headers: {
AuthUtils.AUTH_HEADER: _authToken
},
body: {
'user_id': userId
'photo': _image != null ? 'data:image/png;base64,' +
base64Encode(_image.readAsBytesSync()) : '',
},
);
final responseJson = json.decode(response.body);
print(responseJson);
}
I have tried all the above but none worked for me to upload a file to a server.
After a deep search, I got a plugin the same as Dio.
The following code uploads a file to a server.
uploadFileFromDio(UserProfile userProfile, File photoFile) async {
var dio = new Dio();
dio.options.baseUrl = url;
dio.options.connectTimeout = 5000; //5s
dio.options.receiveTimeout = 5000;
dio.options.headers = <Header Json>;
FormData formData = new FormData();
formData.add("user_id", userProfile.userId);
formData.add("name", userProfile.name);
formData.add("email", userProfile.email);
if (photoFile != null &&
photoFile.path != null &&
photoFile.path.isNotEmpty) {
// Create a FormData
String fileName = basename(photoFile.path);
print("File Name : $fileName");
print("File Size : ${photoFile.lengthSync()}");
formData.add("user_picture", new UploadFileInfo(photoFile, fileName));
}
var response = await dio.post("user/manage_profile",
data: formData,
options: Options(
method: 'POST',
responseType: ResponseType.PLAIN // or ResponseType.JSON
));
print("Response status: ${response.statusCode}");
print("Response data: ${response.data}");
}
I found a working example without using any external plugin , this
only uses
import 'package:http/http.dart' as http;
Code
var stream =
new http.ByteStream(DelegatingStream.typed(imageFile.openRead()));
// get file length
var length = await imageFile.length(); //imageFile is your image file
Map<String, String> headers = {
"Accept": "application/json",
"Authorization": "Bearer " + token
}; // ignore this headers if there is no authentication
// string to uri
var uri = Uri.parse(Constants.BASE_URL + "api endpoint here");
// create multipart request
var request = new http.MultipartRequest("POST", uri);
// multipart that takes file
var multipartFileSign = new http.MultipartFile('profile_pic', stream, length,
filename: basename(imageFile.path));
// add file to multipart
request.files.add(multipartFileSign);
//add headers
request.headers.addAll(headers);
//adding params
request.fields['loginId'] = '12';
request.fields['firstName'] = 'abc';
// request.fields['lastName'] = 'efg';
// send
var response = await request.send();
print(response.statusCode);
// listen for response
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
Please try below solution
Future<String> uploadImageHTTP(file, url) async {
var request = http.MultipartRequest('POST', Uri.parse(url));
request.files.add(await http.MultipartFile.fromPath('picture', file.path));
var res = await request.send();
return res.reasonPhrase;
}
Consider using Flutter's Firebase Storage plugin -- it has features that could be useful for uploading large image files on a mobile connection.
I wrote the plugin, contributions and feedback are welcome!
First of all choose your image from gallery or Camera
File _image;
Future _getImage() async {
var image = await ImagePicker.pickImage(source: ImageSource.gallery);
setState(() {
_image = image;
});
}
Now call the below function on button click or inside the _getImage() function. With the file i'm uploading other fields also you see in the saveInAttendance()
Don't forget to import package :
import 'package:dio/dio.dart';
import 'package:path/path.dart';
Future saveInAttendance( BuildContext context,String entryType,String mode) async {
Dio dio = new Dio();
FormData formData = new FormData(); // just like JS
formData.add("inimageFile", new UploadFileInfo(_image, basename(_image.path)));
formData.add("compID",2);
formData.add("company_id",2);
formData.add("EntryType", entryType);
formData.add("emp_code", 5);
formData.add("Mode",mode);
formData.add("location",""+_startLocation.latitude.toString()+"-"+_startLocation.longitude.toString());
dio.post(url_save_attendance, data: formData, options: Options(
method: 'POST',
responseType: ResponseType.json // or ResponseType.JSON
))
.then((r) {
setState(() {
var data = json.decode(r.toString());
if(data["apiMessage"].contains('Saved')){
warningAlert("Attendance Saved", "Your attendance saved Successfully",context);
}
});
}).catchError(print);
}
For more Info you can visit Here
my working code below, based on #TejaDroid's sample,
it upload one image via the AWS Gateway API with a lambda function behind to store the image into S3.
uploadImageWithhttp(File imageFile, int serialno) async {
var postBody= {
'username': 'test#gmail.com',
"productid": "1000123", //TODO
"imageno": serialno.toString(),
'image': imageFile != null ? base64Encode(imageFile.readAsBytesSync()) : '',
};
final response = await http.post(
constAWSAPIGateway_UploadImage[CONST_API_STAGE],
headers: {
//AuthUtils.AUTH_HEADER: _authToken
'Content-Type' : 'application/json',
},
body: json.encode(postBody),
);
final responseJson = json.decode(response.body);
print(responseJson);
}
to get Body from request Instead of
response.stream.transform(utf8.decoder).listen((value) {
print(value);
});
I use:
String body=await response.stream.bytesToString()
updateProfile() async {
try {
if (_formKey.currentState.validate()) {
_formKey.currentState.save();
var dio = new Dio();
var formData = FormData.fromMap({
'name': name,
'con_person_name': concernedPersonName,
'email': email,
'phone': phoneNumber,
'password': password,
'token': token,
'user_type': '3',
'license_no': licenceNumber,
'gstno': gstNumber,
'address': address,
'hospital_id': '102'
'image': await MultipartFile.fromFile(_image?.path,
filename: _image.path.split('/').last ?? 'image.jpeg'),
});
var response = await dio.post('$SERVER_ADDRESS/api/doctorregister',
data: formData);
print(response.statusCode);
print(response.data);
}
} catch (error) {
print(error.toString());
}
}
Import dio, image_picker library
Future _onGalleryPressed() async {
Future<File> image = ImagePicker.pickImage(source: ImageSource.gallery);
setState(() {
this._imageFile = image;
});
File img = await image;
Navigator.of(context).pop();
if (img != null) {
//API CALL
try {
FormData formData = new FormData.from({"file": path});
var url = backendUrl + "/upload-image";
var token = await _getMobileToken();
Map<String, String> headers = {
'Authorization': 'Bearer $token',
"Content-Type": "multipart/form-data",
"X-Requested-With": "XMLHttpRequest"
};
await dio.post(url,
data: formData,
options: Options(
method: 'POST',
headers: headers,
responseType: ResponseType.json // or ResponseType.JSON
));
Navigator.pop(context);
} catch (e) {}
}
}
If you want to upload it as a binary file.
static uploadFile(File imageFile) async {
final response = await http.post(postURL, body: imageFile.readAsBytesSync());
return json.decode(response.body);
}
Thank you
I have checked about it at multiple places finally i found a solution -
var objToSend = {
"file": await MultipartFile.fromFile(
file.path,
filename: filename,
),
};
FormData formData = FormData.fromMap(objToSend);
print(formData.files.toString());
Dio dio = new Dio();
await dio
.post(_toSend,
data: formData,
options: Options(
method: 'POST',
headers: <String, String>{
"Content-Type": "application/json",
"Access-Control-Allow-Origin": "*",
"Authorization": 'Bearer ' + token
},
))
.whenComplete(() {
print('uploaded');
}).catchError((onError) {
print('failed');
});
I have found a easy way to upload images in flutter and then even receiving it on the server.
Flutter:
MaterialButton(
color: Colors.blue,
child: Text(
"Pick Image from Camera",
style: TextStyle(
color: Colors.white70, fontWeight: FontWeight.bold),
),
onPressed: () async {
final XFile? photo =
await _picker.pickImage(source: ImageSource.camera);
print(photo!.path);
await uploadImage(photo.path);
},
),
'uploadImage' function:
uploadImage(String filepath) async {
var url = 'http://192.168.75.57:4000/upload';
var request = http.MultipartRequest('POST', Uri.parse(url));
request.files.add(await http.MultipartFile.fromPath("img", filepath));
request.fields['_id'] = "abcdef";
request.headers.addAll({
"Content-type": "multipart/form-data",
});
var response = request.send();
return response;
}
On the server Side: (Nodejs)
For this, first install multer (npm install multer)
const multer = require('multer');
const path = require('path')
const storage = multer.diskStorage({
destination: './uploads',
filename: (req, file, cb) => {
cb(null, (new Date()).getTime().toString() + ".jpg");
},
});
const fileFilter = (req, file, cb) => {
if (file.mimetype == "image/jpeg" || file.mimetype == "image/png") {
cb(null, true);
} else {
cb(null, false);
}
};
const upload = multer({
storage: storage,
limits: {
fileSize: 1024 * 1024 * 6,
},
fileFilter: fileFilter,
});
Finally, honoring the request from flutter application:
(In router.js)
router.post('/upload', upload.single("img"), function (req, res) {
console.log("hit")
console.log(req.body._id)
res.send("ok")
})
This method worked for me and I found it comparatively easier than other methods.