jossef/requests

a dart library to make HTTP requests (inspired by python requests module). It comes with JSON support and a lightweight implementation to store cookies like a browser.

Cookies, huh?

Server side cookies (via response header SET-COOKIE) are stored using the assistance of quiver.cache. Stored cookies will be send seamlessly on the next http requests you make to the same domain (simple implementation, similar to a web browser).

Install

Add this to your package's pubspec.yaml file:

dependencies:
  requests: ^4.8.0-alpha.0

Usage

Start by importing the library

import 'package:requests/requests.dart';

Let's make a simple HTTP request

var r = await Requests.get('https://google.com');
r.raiseForStatus();
String body = r.content();

the Response object

just like in python's request module, the Response object has this functionality

• r.throwForStatus() - will throw an exception if the response statusCode is not a great success.
• r.raiseForStatus() - same as throwForStatus
• r.statusCode - the response status code
• r.url - the url in the request
• r.headers - the response headers
• r.success - a boolean. true indicates that the request was a great success
• r.hasError - a boolean. true indicates that the request was not a great success
• r.bytes() - return the body in the response as a list of bytes
• r.content() - return the body in the response as a string
• r.json() - recodes the body in the response and returns the result (dynamic type)

Optional Arguments

• json - a dynamic object that will be json encoded and then be set as the request's body
• body - a raw string to be used as the request's body
• bodyEncoding - default RequestBodyEncoding.FormURLEncoded. will set the content-type header
• headers - Map<String, String> of custom client headers to add in the request
• timeoutSeconds - default 10 seconds. after that period of time without server response an exception is thrown
• persistCookies - default true. if should respect server's command to persist cookie
• verify - default true. if the SSL verification enabled
• withCredentials - default false. for dart web to handle cookies, authorization headers, or TLS client certificates

Note: Only one optional argument can be used in a single request body or json

Class Methods

• .clearStoredCookies(url) - clears the stored cookies for the url
• .setStoredCookies(url, CookieJar) - set the stored cookies for the url
• .getStoredCookies(url) - returns a CookieJar of the stored cookies for the url
• .addCookie(url, name, value) - add a Cookie to the CookieJar associated to the url

Examples

HTTP post, body encoded as application/x-www-form-urlencoded, parse response as json

var r = await Requests.post(
  'https://reqres.in/api/users',
  body: {
    'userId': 10,
    'id': 91,
    'title': 'aut amet sed',
  },
  bodyEncoding: RequestBodyEncoding.FormURLEncoded);

r.raiseForStatus();
dynamic json = r.json();
print(json!['id']);

HTTP delete

var r = await Requests.delete('https://reqres.in/api/users/10');
r.raiseForStatus();

Ignore SSL self-signed certificate

var r = await Requests.get('https://expired.badssl.com/', verify: false);
r.raiseForStatus();

Play with stored cookies

String url = "https://example.com";
await Requests.clearStoredCookies(url);

// Set cookies using [CookieJar.parseCookiesString]
var cookies = CookieJar.parseCookiesString("name=value");
await Requests.setStoredCookies(url, cookies);

// Add single cookie using [CookieJar.parseCookiesString]
var cookieJar = await Requests.getStoredCookies(url);
cookieJar["name"] = Cookie("name", "value");
await Requests.setStoredCookies(url, cookieJar);

// Add a single cookie using [Requests.addCookie]
// Same as the above one but without exposing `cookies.dart`
Requests.addCookie(url, "name", "value");

More examples can be found in example/.

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