Summary - HTTP

Combine http.get, http.post and dio to write an API client.

Summary - HTTP

This group covered HTTP clients in Dart: the http package (get/post), Uri.parse, queryParameters, headers (content-type, authorization), dio (interceptor + auto JSON).

Core: GET reads data (no body), POST carries a body (content-type required for JSON). Uri.parse splits a URL into structural parts.

dio is preferred in larger projects; it offers an interceptor chain and automatic JSON parsing.

Exercise Summary: URL + headers

Inside main add var u = Uri.parse('https://api.example.com/users');. Add var headers = {'content-type': 'application/json'};. Add print(u.host); and print(headers.length);.

Show example solution

void main() {
  var u = Uri.parse('https://api.example.com/users');
  var headers = {'content-type': 'application/json'};
  print(u.host);
  print(headers.length);
}

Test yourself

Which is required for a JSON POST?
- Stream
- Isolate
- Router
- content-type header
Show answer

content-type header — the content-type: application/json header is required.
Match the concepts

get(Uri)

GET request
post(url, body:)

POST request
Uri.parse

URL parsing
Dio

Advanced client

Build a Uri

var u = ____(scheme: 'https', host: 'api.example.com');

Show answer

var u = Uri(scheme: 'https', host: 'api.example.com');

Next lesson: jsonDecode

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