I hope to use nutritionix api to get food information for the users of my application, I manage to get the call to work in Postman, however I cannot convert it to dart code. I am getting this error: '{message: Unexpected token " in JSON at position 0}'
Here is my (POST) postman call:
Here is my attempt at converting that to dart code:
Future<void> fetchNutritionix() async {
String url = 'https://trackapi.nutritionix.com/v2/natural/nutrients';
Map<String, String> headers = {
"Content-Type": "application/json",
"x-app-id": "5bf----",
"x-app-key": "c3c528f3a0c68-------------",
"x-remote-user-id": "0",
};
String query = 'query: chicken noodle soup';
http.Response response =
await http.post(url, headers: headers, body: query);
int statusCode = response.statusCode;
print('This is the statuscode: $statusCode');
final responseJson = json.decode(response.body);
print(responseJson);
//print('This is the API response: $responseJson');
}
Any help would be appreciated! And, again thank you!
Your postman screenshot shows x-www-form-urlencoded as the content-type, so why are you changing that to application/json in your headers? Remove the content type header (the package will add it for you) and simply pass a map to the body parameter:
var response = await http.post(
url,
headers: headers,
body: {
'query': 'chicken soup',
'brand': 'acme',
},
);
Also you can now generate Dart code (and many other languages) for your Postman request by clicking the Code button just below the Save button.
click the three dotes button in request tab and select code option then select your language that you want convert code to
review the query you're posting
your Postman input is x-www-form-urlencoded instead of plain text
String query = 'query: chicken noodle soup';
why don't you try JSON better
String query = '{ "query" : "chicken noodle soup" }';
Related
I'm building an application using flutter where the user provides a string and a set of values must be returned.
I'm unable to figure out what is the cause for the issue.I tried all the solutions provided to the questions similar to this issue but weren't successful.Any help would be really appreciated.
I converted the actual code to dart only, for easy testing online using dartpad.
import 'dart:convert' as convert;
import 'package:http/http.dart' as http;
final body = <String, String>{
"id": '1',
"language": "en",
"text": "I love this service",
};
final headers = <String, String>{
"content-type": "application/json",
"X-RapidAPI-Key": "7f980b3d2cmsh1d666b571febd6ep11df80jsna27f76c06e6b",
"X-RapidAPI-Host": "big-five-personality-insights.p.rapidapi.com",
};
void main(List<String> arguments) async {
final response = await http.post(
Uri.parse('https://big-five-personality-insights.p.rapidapi.com/api/big5'),
headers: headers,
body: [
convert.jsonEncode(body),
],
);
if (response.statusCode == 201) {
// If the server did return a 201 CREATED response,
// then parse the JSON.
print('success');
print(convert.jsonDecode(response.body));
} else {
// If the server did not return a 201 CREATED response,
// then throw an exception.
print('fail');
throw Exception('Failed to get a response.');
}
}
You have a bad value for the body argument of http.post.
The documentation for the method states:
body sets the body of the request. It can be a String, a List or a Map<String, String>. [...] If body is a List, it's used as a list of bytes for the body of the request.
Since the API you are talking to requires an array to be sent, you want to wrap the body in a list before converting it all to json (note how the brackets have shifted inside the convert method:
final response = await http.post(
Uri.parse('https://big-five-personality-insights.p.rapidapi.com/api/big5'),
headers: headers,
body: convert.jsonEncode([body]),
);
Sidenote: The API responds with statusCode 200 on a successful request, not 201; at least in my testing.
The body parameter of a post method sets the body of the request. It can be a String, a List or a Map<String, String>. If it's a String, it's encoded using encoding and used as the body of the request. The content-type of the request will default to "text/plain".
As you passed it as a List, then it expects it to be a List of integers, but you are passing it a List type (or in this specific case List type). Here is a fixed code.
final response = await http.post(
Uri.parse('https://big-five-personality-insights.p.rapidapi.com/api/big5'),
headers: headers,
body: convert.jsonEncode(body),
);
I am making a mobile app using Flutter & Dart. I have a put request that updated a database. The request keeps giving a bad request 400. The code is as follow:
Future<void> updateStudent(int id, Student newStudent) async {
var res = await http.put(
Uri.parse('https://10.0.2.2:7030/api/Student/{id}?Id=7'),
headers: {
"Accept": "application/json",
"content-type": "application/json"
},
body: json.encode({
'id': newStudent.id,
'dep_id': newStudent.depId,
'name_ar': newStudent.nameAr,
'name_en': newStudent.nameEn,
'name_moth': newStudent.nameMoth,
'birth': newStudent.birth,
}));
}
I tried many suggestions. Also I tried to do the request this way code. But same issue.
The API is working just fine with postman but for some reason it does not with Flutter. I postman I used query params and body with raw json There is something wrong but I am not able to find it.
Any idea or suggestions?
Update
I debugged the request and it showing an error on "BodyField" stating the Bad state: Cannot access body fields of a Request without "content-type : application/x-www-form-urlencoded
Even though I am using json.
I also tried to change the content type but it is giving unsupported media type.
in postman I am using put method with this url
https://localhost:7030/api/Student/{id}?Id=7
Change your url and body to this:
var url = Uri.https('https://10.0.2.2:7030', 'api/Student/{id}');
var res = await http.put(
url,
headers: {
"Accept": "application/json",
"content-type": "application/json"
},
body: {
'id': newStudent.id,
'dep_id': newStudent.depId,
'name_ar': newStudent.nameAr,
'name_en': newStudent.nameEn,
'name_moth': newStudent.nameMoth,
'birth': newStudent.birth,
});
you already add id in body, no need to put it in url too.
Just learning Flutter and running into this issue when trying to call an API:
final response = await http.get(
Uri.https(apiBaseUrl, apiBaseEndpoint + "/tasks"),
headers: {
"Authorization": "Bearer " + apiKey,
},
);
print(response.body);
Part of my response contains Ä°ftar and it's supposed to be İftar. I imagine it's some encoding problem? curl gives me back the response with the proper characters.
Basically: is this a text encoding problem? If so, how do I fix my request?
Ok, after a little bit more digging on the http docs I realized it wasn't in how I made my request that needed to change, but how I handled the response. I was doing
final decodedJson = json.decode(response.body);
and I should've been doing:
final decodedJson = json.decode(utf8.decode(response.bodyBytes));
That has solved my issue!
I have just updated to Flutter 2. I updated all the dependencies including http. Now I have a problem with the following:
Future<UserLogin> fetchStaff(String pUserName, String pPassword) async {
final response = await http
.post(Uri.encodeFull('$kBaseUrl/LoginService/CheckLogin'),
headers: {'Content-Type': 'application/json', 'Accept': 'application/json'},
body: '{ "pUser": "$pUserName", "pPassword": "$pPassword"}')
.timeout(Duration(seconds: kTimeOutDuration));
I'm getting an error on the: Uri.encodeFull('$kBaseUrl/LoginService/CheckLogin'
"The argument type 'String' can't be assigned to the parameter type 'Uri'."
$kBaseUrl = 'https://subdom.mydomain.com:443/mobile';
What do I need to change?
Post method used to take string previously, now they have modified to Uri
so used, Uri.parse to get the uri
.post(Uri.parse(Uri.encodeFull('$kBaseUrl/LoginService/CheckLogin'))
Like the error says, this is because post function expects a Uri and you have passed a String (returned by Uri.encodeFull) to it. You need to use Uri.parse to pass a Uri to it.
final response = await http
.post(Uri.parse('$kBaseUrl/LoginService/CheckLogin'),
If you had a String, such as:
String strUri="${yourBaseUrl}/yourPath/yourFile";
Using
http.post(Uri.parse(strUri),
headers: {...},
body: {...},
);
is enough to get all working back.
You may try Uri.tryParse(strUri) to handle null if the uri string is not valid as a URI or URI reference.
i have the follow function:
Future<Null> _loadORDER(String menssage) async {
var enZona =await ApiClient.zonaNum(menssage, apiKey);
print('enZona: $enZona');
if (enZona == 'true') {
_moveToNotification(context);
};
}
the print give me the follow message: "enZona: Instance of 'Response'"
if i test the response from postman of the api query is working normally and give me: true ,
then i hope that the print result will be : "enZona: true"
but i don't know how i do to wait the response of the ApiClient before continue with the conditional (if)
thanks for your help!
thanks i add the .body but i get the same response, the apiclient code is the follow:
final response = await http.get(baseUrl + '/shop/order/$message',
headers: {HttpHeaders.authorizationHeader: apiKey});
print("enZona: $response.body");
return response;
the print value for this is: enZona: Instance of 'Response'.body
You should do print("enZona: ${response.body}"); with the curly bracket, or you can assign response.body to some variable first.
final foo = response.body; print(foo);
If you go to the pub.dev documentation for the Response class, you will see that Response is more than the content of the response. It is a wrapper class that also includes information such as the statusCode of the response, the headers, etc.
When you saw the response in Postman, you only cared about the content of the response, that is, the body of the response. What you are looking for in your code is not the enZona instance of Response, but the body of the enZona response.
Therefore, you have to swap enZona by enZona.body when trying to access the contents of your response.