CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate in MultipartFile - flutter

Question

HandshakeException: Handshake error in client (OS Error:
CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate(handshake.cc:354))
getting HandshakeException while upload file and fields
const TestMode = true;
addAssets(Map formFields, List files) async {
Map resp = {
'Status' : false,
'Msg' : "Unable to add asset"
};
try {
Uri url = Uri.parse("$BaseUrl$AddAssetUrl");
http.MultipartRequest multi = http.MultipartRequest("POST", url);
formFields.forEach((key, val) {
multi.fields[key] = val;
});
for (var val in files) {
var myFile = await http.MultipartFile.fromPath('MediaFiles[]', val);
multi.files.add(
myFile,
);
}
http.StreamedResponse streamedResponse = await multi.send().then((response) async {
return response;
});
String body = await streamedResponse.stream.bytesToString();
if(streamedResponse.statusCode == 200 && isJSON(body)){
Map data = json.decode(body);
resp['Status'] = data['Status'];
resp['Msg'] = data['Msg'];
}
debugPrint(body);
} catch (e) {
if(TestMode) print(e.toString());
}
return resp;
}
Upload file using MultipartFile
TestMode is constant
http is alias of package:http/http.

Answer 1

Reference: Github
Just send your request via IOClient
example:
addAssets(Map formFields, List files) async {
Map resp = {
'Status' : false,
'Msg' : "Unable to add asset"
};
try {
Uri url = Uri.parse("$BaseUrl$AddAssetUrl");
http.MultipartRequest multi = http.MultipartRequest("POST", url);
formFields.forEach((key, val) {
multi.fields[key] = val;
});
for (var val in files) {
var myFile = await http.MultipartFile.fromPath('MediaFiles[]', val);
multi.files.add(
myFile,
);
}
HttpClient httpClient = HttpClient();
httpClient .badCertificateCallback = (X509Certificate cert,String host,int port) {
return getBaseUrl() == host;
};
http.StreamedResponse streamedResponse = await IOClient(
httpClient
).send(multi);
String body = await streamedResponse.stream.bytesToString();
if(streamedResponse.statusCode == 200 && isJSON(body)){
Map data = json.decode(body);
resp['Status'] = data['Status'];
resp['Msg'] = data['Msg'];
}
debugPrint(body);
} catch (e) {
if(TestMode) print(e.toString());
}
return resp;
}
String getBaseUrl(){
String url = 'https://hostname.com/api_dir/'; // Your api url
url = url.substring(url.indexOf('://')+3);
return url.substring(0,url.indexOf('/'));
}