I'm trying to make a demo app with flutter and trying to fetch products from a demo magento site.
This is my code:
Future<List<Product>> fetchProducts() async {
final params = <String, String>{
'searchCriteria[filter_groups][0][filters][0][condition_type]': 'in',
'searchCriteria[filter_groups][0][filters][0][field]': 'type_id',
'searchCriteria[pageSize]': '20',
'searchCriteria[filter_groups][0][filters][0][value]': 'simple,configurable,bundle',
'searchCriteria[currentPage]': '1',
'searchCriteria[sortOrders][0][field]': 'created_at',
'searchCriteria[sortOrders][0][direction]': 'DESC'
};
var uri = Uri.parse('https://demo.com/rest/v1/default/products');
uri = uri.replace(queryParameters: params);
print(uri);
final response =
await http.get(uri, headers: {HttpHeaders.authorizationHeader: "Bearer qb7157owxy8a29ewgogroa6puwoafxxx"});
if (response.statusCode == 200) {
// If the call to the server was successful, parse the JSON.
final data = json.decode(response.body);
final products = data["items"] as List;
return products.map<Product>((json) => Product.fromJson(json)).toList();
} else {
// If that call was not successful, throw an error.
throw Exception('Failed to load post');
}
}
When I debugged, the response was 400 - Bad request. I guess that because the uri was encoded to include percentage characters as I printed as below:
So how can I disable encoding the uri?
Thank you, guys.
I believe you should replace:
var uri = Uri.parse('https://demo.com/rest/v1/default/products');
uri = uri.replace(queryParameters: params);
print(uri);
with:
var uri = Uri.https('demo.com', '/rest/v1/default/products', params);
more on this: Uri.https
more on: replace
example result:
regardless of this, if I try with your params, the library behaves normal and encodes the special characters. (see more here)
if we put the actual request in the browser to check the response:
https://demo.mage-mobile.com/rest/v1/default/products?searchCriteria[filter_groups][0][filters][0][condition_type]=in&searchCriteria[filter_groups][0][filters][0][field]=type_id&searchCriteria[pageSize]=20&searchCriteria[filter_groups][0][filters][0][value]=simple%2Cconfigurable%2Cbundle&searchCriteria[currentPage]=1&searchCriteria[sortOrders][0][field]=created_at&searchCriteria[sortOrders][0][direction]=DESC
we get the following response:
And this brings me to my initial suspicion: the API does not support this call.
Maybe you should also check this type of param from your code: 'searchCriteria[filter_groups][0][filters][0][condition_type]', it seems you are trying to acces some information from a collection but you actually writing a string...
try removing the quotes (' bla bla ') from these params id... also try to put the request direcly in the browser(or postman) to see it work.
About the encoding (changing [ to %5B) -- this is normal and it should happen.
Related
I'm wondering how I can get data from other servers and API with deno ? Everything in the documentation teach me about making http servers and read files from local source. But I can't find anything useful about reading something on the network.
How can read JSON data from the Stripe API ? Or if I want to read a HTML file with text inside ?
Thank you for your time!
I am just giving you an example of the GET request for fetching repositories of Github.
You can change the URL and Request Configuration as per your need.
In the code given below, I am calling another API of Github. By using the fetch() method you can do that.
fetch() method first takes the URL as the first parameter and the next parameter is RequestInit which takes the request method type, headers, body, etc and at the end returning JSON response of that API call.
const githubResponse = async (): Promise<any> => {
const response = await fetch("https://api.github.com/search/repositories?q=android", {
method: "GET",
headers: {
"Content-Type": "application/json",
},
});
return response.json(); // For JSON Response
// return response.text(); // For HTML or Text Response
}
console.log(await githubResponse());
I have written the above code in a ts file named Testing.ts . So, you can run the above code by the command given below:
deno run --allow-net Testing.ts
Next, I am giving you a sample POST request code:
const githubResponse = async (): Promise<any> => {
const body: URLSearchParams = new URLSearchParams({
q: "AvijitKarmakar",
});
const response = await fetch("https://api.github.com/search/repositories", {
method: "POST",
headers: {
"Content-Type": "application/json",
},
body: body
});
return response.json();
// return response.text(); // For HTML or Text Response
}
console.log(await githubResponse());
You can see that I have created a body object and passed it in the RequestInit through the body parameter and also changed the request method type to POST.
You'll need to do a HTTP Request, for that in Deno you use fetch, the same Web API the browsers use.
To read JSON response:
const res = await fetch('https://api.stripe.com');
const data = await res.json();
If you want HTML:
const res = await fetch('https://example.com');
const html = await res.text();
// Now you can use some HTML parsing lib
fetch requires the --allow-net flag.
Deno strives to be as close to the existent browser API as possible.
That means, you can use fetch. Example:
// fetch-kitten.ts
fetch("https://placekitten.com/200/300").then(async (d) =>
Deno.writeFile("kitten.jpg", new Uint8Array(await d.arrayBuffer()))
);
CLI:
deno run --allow-net --allow-write fetch-kitten.ts
Reference
I need a way to set the headers of the dart http Request object to application/JSON.
I want to build a Request object to send to my backend API. I set the body to my JSON object, but when it gets sent, it defaults the headers to text/html instead of application/json.
I have tried using the built-in method
http.post(url,dynamic body);
but unfortunately this method places the body in the parameters of the URL and I need it in the actual body of the request.
So instead I built an http Request object, and manually set the URL and body but like I said, it sets the headers to text/html.
I have read the docs for https://pub.dev/documentation/http/latest/http/Request-class.html, but unfortunately, I haven't found a way to set the headers.
postRequest(uri) async {
Uri url = Uri.tryParse("https://ptsv2.com/t/umt4a-1569012506/post");
http.Request request = new http.Request("post", url);
request.body = '{mediaItemID: 04b568fa, uri: https://www.google.com}';
var letsGo = await request.send();
print(letsGo.statusCode);
}
Much thanks for any possible solutions!
Ps. this is my first ask on Stack Overflow so I apologize if I made any errors in posting.
Solved!
postRequest(uri) async {
Uri url = Uri.tryParse("https://ptsv2.com/t/umt4a-1569012506/post");
http.Request request = new http.Request("post", url);
request.headers.clear();
request.headers.addAll({"content-type":"application/json; charset=utf-8"});
request.body = '{mediaItemID: 04b568fa, uri: https://www.google.com}';
var letsGo = await request.send();
print(letsGo.statusCode);
}
I was having some issues with the Request object default setting the encoding.
By manually specifying utf-8, the server I am contacting accepts it.
for the post or get any request you can Add Header like this -
var permAddUrl = 'your requested url';
var bodyParameters = {
'Email': email,
'MobileNo': mobileNumber,
};
await http.post(
requesturl,
headers: { 'Content-Type': 'application/x-www-form-urlencoded',
"Authorization":"$token",
},
body: bodyParameters,).then((response) {
var data = json.encode(response.body);
print(data);
setState(() {
if(response.statusCode == 200){
//var statesList = data['data'];
UtilAction.showSnackBar(context, " Details Submitted Successfully");
}
});
});
I'm developing a profile card that has to get different value's. I'm getting all the value's but i also want to load a network image. I'm using a filemaker server and i had noticed that i needed coockies to load this. When i make a request copy paste the image url into my browser it just loads. But whenever i'm loading it into my application i get the 401 statusCode with my image.
I have tried just a valid network image that's working, i have readed something about coockies but i'm not sure if i need to use them and how. I also find it weird that whenever i load the image in my browser it works but not on my application.
Future makeRequest() async {
var url4 =
"https://fms.xxxxxx.nl/fmi/data/v1/databases/Roscom Management Systeem/layouts/medewerker pa api/_find";
var body = json.encode({
"query": [
{"Emailadres(1)": "xxxx#xxx.nl"}
],
});
Map<String, String> headers = {
'Content-type': 'application/json',
'Accept': 'application/json',
"Authorization":
'Bearer xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
};
var response = await http.post(url4, body: body, headers: headers);
setState(() {
var responseJson = json.decode(response.body);
data = responseJson['response']['data'][0];
profielfoto = data['fieldData']['iMedewerker Foto'];
print(profielfoto);
});
Value i get in the terminal
I expect that i can load the image in a networkimage with just the var $profielfoto. I don't know what to do with the coockies or maybe there's a much easier way to do it. I hope someone can help me please let me know if i need to provide more information about the server or anything else. ;)
A few things. Please do not put any type of heavy processing in setState
https://docs.flutter.io/flutter/widgets/State/setState.html
Generally it is recommended that the setState method only be used to
wrap the actual changes to the state, not any computation that might
be associated with the change. For example, here a value used by the
build function is incremented, and then the change is written to disk,
but only the increment is wrapped in the setState:
setState tells the widget when it needs to be redrawn
https://flutter.dev/docs/cookbook/images/network-image
String _profilePhoto = "";
//Change await into an async operation
http.post(url4, body: body, headers: headers).then( (response) {
var responseJson = json.decode(response.body);
print(data['fieldData']['iMedewerker Foto']);
setState(() {
_data = responseJson['response']['data'][0];
_profilePhoto = data['fieldData']['iMedewerker Foto'];
});
})
Widget build(BuildContext context){
//Check if string is empty
if ( _profilePhoto == "" ){
return CircularProgressIndicator();
}else {
return Image.network( _profilePhoto );
}
}
https://flutter.dev/docs/cookbook/images/network-image
https://pub.dartlang.org/packages/cached_network_image
You have two choices to grab images from the network. I believe I presented one way.
the authorization token must be the issue. a secure server will return this token when a user logs in. then all ensuing request must have this token in the 'authorization header'. if it is not there or incorrect the server returns a 401
I am trying to call an api and post a simple json string. when debugging using VS Code, the function appears to work but nothing is returned. I suspect I don't have the headers correct. Here is my code:
{return this.http.post(
url,
content,
{ headers: this.getCommonHeaders() }
).pipe(
map(response => response.json()),
tap(data => {
console.log(data.systemAssignId)
this.san = data.systemAssignId
}),
catchError(this.handleErrors)
);}
The getCommonHeaders function looks like this:
getCommonHeaders() {
let headers = new Headers();
headers.append("Authorization", "Bearer "+ Config.token.toString().trim);
headers.append("Content-type", "application/json")
return headers;
}
I've been struggling with this for hours now. I must be missing something fundamental but cannot seem to catch it. The API works fine from Postman.
You should use HttpClient instead of Http module which was deprecated long back. With HttpClient the default response format is JSON.
I'm working on creating a Flutter application that works with LIFX. I'm trying to follow their instructions here, but I'm having issues adding a header to my HTTP GET request.
TestHttpGet() async {
var httpClient = new HttpClient();
var header = "Bearer $token"; //token hidden
var url = 'https://api.lifx.com/v1/lights/all/state';
String result;
try {
var request = await httpClient.getUrl(Uri.parse(url));
request.headers.set("Authorization", header);
var response = await request.close();
if (response.statusCode == HttpStatus.OK) {
var json = await response.transform(UTF8.decoder).join();
print(json);
var data = JSON.decode(json);
result = data['brightness'].toString();
} else {
result =
'Error getting response:\nHttp status ${response.statusCode}';
}
} catch (exception) {
result = 'Failed parsing response';
}
This returns with Error getting response: Http status 404. I've tried various ways of request.headers .set .add [HttpHeaders.Authorization] = "header" all return with a 404. Any advice would be appreciated.
You can pass a Map<String, String> to the http.get call as the headers parameter like this:
await httpClient.get(url, headers: {
'Authorization': 'Bearer $token',
});
In order to set headers you can't set the entire variable since it is set as final. What you need to do is set the value of the individual array items which are also known as the individual "headers" in this case.
For example :
http.Request request = http.Request('GET', uri);
request.headers['Authorization'] = 'Bearer $token';
I believe dart makes all the fields of a HttpHeader to lowercase.
https://github.com/flutter/flutter/issues/16665
The argument for that is because "Field names are case-insensitive". (otherwise it is not HTTP compliant)
https://www.rfc-editor.org/rfc/rfc2616#section-4.2
Let me know if you found a workaround for this.